android 向webview传值

android中可以使用WebView加载网页，同时Android端的java代码可以与网页上的javascript代码之间相互调用。

效果图：

（一）Android部分：

布局代码：

<span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><LinearLayout</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">xmlns:android</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"http://schemas.android.com/apk/res/android"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">xmlns:tools</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"http://schemas.android.com/tools"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"match_parent"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_height</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"match_parent"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:focusable</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"true"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:focusableInTouchMode</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"true"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:orientation</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"vertical"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:padding</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"8dp"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">tools:context</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">".MainActivity"</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

    </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><LinearLayout</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"match_parent"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_height</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"wrap_content"</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><EditText</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:id</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@+id/input_et"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"0dp"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_height</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"wrap_content"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:singleLine</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"true"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_weight</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"1"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:hint</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"请输入信息"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><Button</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:text</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"Java调用JS"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"wrap_content"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_height</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"wrap_content"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:onClick</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"sendInfoToJs"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></LinearLayout></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

    </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><WebView</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:id</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@+id/webView"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"match_parent"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:layout_height</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"match_parent"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></LinearLayout></span>

Activity代码：

<span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">/**
 * Android WebView 与 Javascript 交互。
 */</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">class</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">MainActivity</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">extends</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">ActionBarActivity</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">private</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">WebView</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

    </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">@SuppressLint</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">({</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"SetJavaScriptEnabled"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"AddJavascriptInterface"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">})</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">@Override</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">protected</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">void</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> onCreate</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Bundle</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> savedInstanceState</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">super</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">onCreate</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">savedInstanceState</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        setContentView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">R</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">layout</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">activity_main</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        webView </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">WebView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> findViewById</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">R</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">id</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">setVerticalScrollbarOverlay</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">true</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//设置WebView支持JavaScript</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">getSettings</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">().</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">setJavaScriptEnabled</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">true</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">String</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> url </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"http://192.168.1.27/js_17_android_webview.html"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">loadUrl</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">url</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//在js中调用本地java方法</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">addJavascriptInterface</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">JsInterface</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">this</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">),</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"AndroidWebView"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//添加客户端支持</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">setWebChromeClient</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">new</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">WebChromeClient</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">());</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

    </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">private</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">class</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">JsInterface</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">private</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Context</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> mContext</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">JsInterface</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Context</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> context</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">this</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">mContext </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> context</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

        </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//在js中调用window.AndroidWebView.showInfoFromJs(name)，便会触发此方法。</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">@JavascriptInterface</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">void</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> showInfoFromJs</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">String</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> name</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
            </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Toast</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">makeText</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">mContext</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> name</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Toast</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">LENGTH_SHORT</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">).</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">show</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

    </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//在java中调用js代码</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">public</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">void</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> sendInfoToJs</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">View</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> view</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">String</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> msg </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">((</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">EditText</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> findViewById</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">R</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">id</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">input_et</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">)).</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">getText</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">().</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">toString</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">();</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//调用js中的函数：showInfoFromJava(msg)</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
        webView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">loadUrl</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"javascript:showInfoFromJava('"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">+</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> msg </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">+</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"')"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span>

（二）网页代码：

<span class="dec" style="box-sizing: border-box; color: rgb(102, 0, 102);"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><html></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><meta</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">http-equiv</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"Content-Type"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">content</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"text/html; charset=utf-8"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><meta</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">http-equiv</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"Content-Language"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">content</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"zh-cn"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><title></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">Android WebView 与 Javascript 交互</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></title></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><head></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><style></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  body </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">background</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">color</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:#</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">e6e6e6</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">rect
  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    color</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">white</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    font</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">family</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Verdana</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Arial</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">Helvetica</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">,</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> sans</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">serif</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    font</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">size</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">16px</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    width</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">100px</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    padding</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">6px</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    background</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">color</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:#</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">98bf21</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    text</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">decoration</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">none</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    text</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">align</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">center</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    border</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">none</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    cursor</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">pointer</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">inputStyle </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">{</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">font</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">-</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">size</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">16px</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">padding</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">:</span><span class="lit" style="box-sizing: border-box; color: rgb(0, 102, 102);">6px</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></style></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></head></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><body></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><p></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">测试Android WebView 与 Javascript 交互</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></p></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><input</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">id</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"name_input"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">class</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"inputStyle"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">type</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"text"</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">/></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><a</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">class</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"rect"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> </span><span class="atn" style="box-sizing: border-box; color: rgb(102, 0, 102);">onclick</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">sendInfoToJava</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">()</span><span class="atv" style="box-sizing: border-box; color: rgb(0, 136, 0);">"</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);">></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">JS调用Java</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></a></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"><script></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">function</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> sendInfoToJava</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(){</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//调用android程序中的方法，并传递参数</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">var</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> name </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">=</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> document</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">getElementById</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"name_input"</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">).</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">value</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">;</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    window</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="typ" style="box-sizing: border-box; color: rgb(102, 0, 102);">AndroidWebView</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">.</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">showInfoFromJs</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">name</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

  </span><span class="com" style="box-sizing: border-box; color: rgb(136, 0, 0);">//在android代码中调用此方法</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="kwd" style="box-sizing: border-box; color: rgb(0, 0, 136);">function</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);"> showInfoFromJava</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">msg</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">){</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
    alert</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">(</span><span class="str" style="box-sizing: border-box; color: rgb(0, 136, 0);">"来自客户端的信息："</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">+</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">msg</span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">);</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="pun" style="box-sizing: border-box; color: rgb(102, 102, 0);">}</span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
  </span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></script></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">

</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></body></span><span class="pln" style="box-sizing: border-box; color: rgb(0, 0, 0);">
</span><span class="tag" style="box-sizing: border-box; color: rgb(0, 0, 136);"></html></span>

android 向webview传值的更多相关文章

Android中webView和网页的交互
Android中webView和网页的交互 Android中webView跟网页的交互式通过JavaScript进行的.具体步骤: 1.创建JavaScript,在点击的时候调用JavaScript ...
Android 显示 WebView ，加载URL 时，向webview的 header 里面传递参数
1.主要布局 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:and ...
Android中Webview使用自定义的javascript进行回调
先说为什么需要讨论这个问题. 现在很多的手机应用,都可能会直接嵌入一个web页面.这样做的好处:一个是功能更新方便,维护起来容易,只需要维护服务器的页面即可,不需要更新客户端:另一个是功能通用,不仅a ...
android使用Webview上传图片
package com.example.webview; import java.io.File; import android.net.Uri;import android.os.Bundle;im ...
Android之 -WebView实现离线缓存阅读
前言本篇博客要实现的是一个离线下载和离线阅读的功能,这是很多阅读类app都常见的一个功能,典型的应用就是网易新闻.什么是离线下载?其实这个概念是比较模糊,是离线之后下载呢,还是下载之后离线,但稍微有 ...
Android中Intent传值与Bundle传值的区别详解
Android中Intent传值与Bundle传值的区别详解举个例子我现在要从A界面跳转到B界面或者C界面这样的话我就需要写2个Intent如果你还要涉及的传值的话你的Intent就要写两 ...
在Android的webview中定做js的alert,confirm和prompt对话框的方法
在Android的webview中定制js的alert,confirm和prompt对话框的方法 http://618119.com/archives/2010/12/20/199.html 1.首先 ...
Android 响应webview中图片的点击事件
最近碰到个新需求需要点击webview中的图片进行放大显示. 整理了下思路,想到了下面的一个可行的方案. 方案思路, 1.在点击图片的时候调用本地的java方法并给出响应的图片地址 2.本地获得图片地 ...
android利用WebView实现浏览器的封装
android提供了封装浏览器的接口,可以让开发者利用自己的view显示网页内容.今天又实现研究了一下,利用WebView显示浏览器内容,还可以利用 WebViewClient显示自己需要的内容. 参 ...

随机推荐

JAVA面向对象-----成员内部类访问细节
JAVA面向对象-–成员内部类访问细节私有的成员内部类不能在其他类中直接创建内部类对象来访问. 如果内部类中包含有静态成员,那么java规定内部类必须声明为静态的访问静态内部类的形式:Outer.I ...
【安卓开发】为什么不能往Android的Application对象里存储数据
在一个App里面总有一些数据需要在多个地方用到.这些数据可能是一个 session token,一次费时计算的结果等.通常为了避免activity之间传递对象的开销 ,这些数据一般都会保存到持久化存储 ...
详解EBS接口开发之供应商导入
(一)供应商常用标准表简介 1.1 常用标准表如下表中列出了与供应商相关的表和说明: 表名说明其他信息 ap_suppliers 供应商头表供应商的头信息如:供应商名.供应商编码.税号等 ...
android获取短信并自动填充
package com.velo.quanquan.util; import java.util.regex.Matcher; import java.util.regex.Pattern; impo ...
x264源代码简单分析：x264命令行工具（x264.exe）
===================================================== H.264源代码分析文章列表: [编码 - x264] x264源代码简单分析:概述 x26 ...
Java基本语法-----java变量
1.变量的概述用于存储可变数据的容器. 2.变量存在的意义计算机主要用于处理生活中的数据,由于生活中存在大量的可变数据,那么计算机就必须具备存储可变数据的能力. 比如: 1.时间每一秒都在发生变化 ...
JSP 2.x 自定义标签
JSP 1.x的标签,虽然使用起来非常灵活,但是比较复杂,JSP 2.x提供了一组简化的标签写法 SimpleTagSupport是SimpleTag接口的子类,同时支持参数和标签体,最核心的方法时d ...
15 ActionBar 总结
ActionBar 一, 说明是一个动作栏是窗口特性提供给用户动作导航模式可以适配不同的屏幕二, ActionBar 提供的功能 1. 显示菜单项 always:总是展示到ActionBa ...
Android Demo---如何敲出圆角的Button+圆角头像
经常玩儿App的小伙伴都知道,APP上面有很多按钮都是圆角的,圆形给人感觉饱满,富有张力,不知道设计圆角按钮的小伙伴是不是和小编有着相同的想法`(*∩_∩*)′,听小编公司开发IOS的小伙伴说,他们里 ...
Android使用局和数据实现天气项目-android学习之旅（十二）
1.首先注册聚合数据账号,下载相应的sdk 2.导入jar包和 so文件配置Application,初始化sdk <application //自己新建的application类 androi ...

android 向webview传值

android 向webview传值的更多相关文章

随机推荐

热门专题