【转】Android AlertDialog自定义布局

原文网址：https://blog.csdn.net/u010694658/article/details/53022294

由于开发中经常使用弹框，然而系统自带的弹框太局限，也不太美观，经常不能满足开发需求，所以就只能自定义布局。其实自定义布局很简单，没不要写出来，但是如果不写一遍的，后面遇到的话就感觉又会忘记，所以在次记一小笔，仅记一个最简单的例子，可以举一反三。 

直接上代码

public class MainActivity extends Activity implements OnClickListener {

    private TextView text1, text2;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        mContext = this;
        initView();

    }

    private void initView() {
        text1 = (TextView) findViewById(R.id.text1);
        text2 = (TextView) findViewById(R.id.text2);

        text1.setOnClickListener(this);
        text2.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.text1:
            dialogShow1();
            break;
        case R.id.text2:
            dialogShow2();
            break;

        default:
            break;
        }
    }

    private void dialogShow1() {
        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle("温馨提示");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setMessage("原理是基本");
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface arg0, int arg1) {
                Toast.makeText(mContext, "no", 1).show();
            }
        });
        builder.setPositiveButton("立即更新",
                new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface arg0, int arg1) {
                        Toast.makeText(mContext, "ok", 1).show();
                    }
                });
        Dialog dialog = builder.create();
        dialog.show();
    }

    /**
     * 自定义布局
     * setView()只会覆盖AlertDialog的Title与Button之间的那部分，而setContentView()则会覆盖全部，
     * setContentView()必须放在show()的后面
     */
    private void dialogShow2() {
        AlertDialog.Builder builder = new Builder(mContext);
        LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.update_manage_dialog, null);
        TextView content = (TextView) v.findViewById(R.id.dialog_content);
        Button btn_sure = (Button) v.findViewById(R.id.dialog_btn_sure);
        Button btn_cancel = (Button) v.findViewById(R.id.dialog_btn_cancel);
        //builer.setView(v);//这里如果使用builer.setView(v)，自定义布局只会覆盖title和button之间的那部分
        final Dialog dialog = builder.create();
        dialog.show();
        dialog.getWindow().setContentView(v);//自定义布局应该在这里添加，要在dialog.show()的后面
        //dialog.getWindow().setGravity(Gravity.CENTER);//可以设置显示的位置
        btn_sure.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                dialog.dismiss();
                Toast.makeText(mContext, "ok", 1).show();
            }
        });

        btn_cancel.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                dialog.dismiss();
                Toast.makeText(mContext, "no", 1).show();
            }
        });
    }

}

activity_main的布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="100dp"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/text1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:gravity="center"
        android:text="弹出dialog"
        android:textSize="@dimen/activity_horizontal_margin" />

    <TextView
        android:id="@+id/text2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:gravity="center"
        android:text="弹出自定义布局dialog"
        android:textSize="@dimen/activity_horizontal_margin" />

</LinearLayout>

update_manage_dialog布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#00FFFFFF" >

    <RelativeLayout
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:layout_centerInParent="true"
        android:background="@drawable/update_bg" >

        <TextView
            android:id="@+id/dialog_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp"
            android:gravity="center"
            android:text="温馨提示"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/dialog_content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/dialog_title"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="30dp"
            android:layout_marginRight="30dp"
            android:text="原理是基本\n实践出真知"
            android:textSize="14sp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/dialog_btn_cancel"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@null"
                android:text="取消"
                android:textColor="#AAAAAA"
                android:textSize="14sp" />

            <Button
                android:id="@+id/dialog_btn_sure"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@null"
                android:text="立即更新"
                android:textSize="14sp" />
        </LinearLayout>
    </RelativeLayout>

</RelativeLayout>

update_bg放在drawable里面，代码如下

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <!-- android:radius 弧形的半径 -->
    <corners android:radius="30dp" />

    <!-- 填充的颜色 -->
    <solid android:color="@android:color/white" />

</shape>