ButterKnifer使用
ButterKnifer使用
1.集成
github地址: https://github.com/JakeWharton/butterknife
1.1在主Moduel中的使用
在主moduel中的build.gradle中添加一下配置
android {
...
// Butterknife requires Java 8.
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'com.jakewharton:butterknife:10.2.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.0'
}
如果您使用的是Kotlin,请替换annotationProcessor
为kapt
。
1.2在Library projects项目中使用
1.在Android project的build.gradle中添加
buildscript {
repositories {
mavenCentral()
google()
}
dependencies {
classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.0'
}
}
2.在Library的buid.gradle中添加如下配置
apply plugin: 'com.android.library'
apply plugin: 'com.jakewharton.butterknife'
3.确保在Butter knife annotations中使用R2替换R。
class ExampleActivity extends Activity {
@BindView(R2.id.user) EditText username;
@BindView(R2.id.pass) EditText password;
...
}
2. ButterKnife的基本使用场景
2.1 在Activity中绑定ButterKnife:
@BindView(R.id.bt)
Button bt;
@BindView(R.id.bt2)
Button bt2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
}
@OnClick({R.id.bt, R.id.bt2})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.bt:
Toast.makeText(this,"button1被点击了",Toast.LENGTH_LONG).show();
break;
case R.id.bt2:
Toast.makeText(this,"button2被点击了",Toast.LENGTH_LONG).show();
break;
}
}
2.2 在Fragment中绑定ButterKnife
private Unbinder unbinder;
@BindView(R.id.bt1)
Button bt1;
@BindView(R.id.bt2)
Button bt2;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_first, container, false);
unbinder= ButterKnife.bind(this,view);
return view;
}
@OnClick({R.id.bt1, R.id.bt2})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.bt1:
break;
case R.id.bt2:
break;
}
}
@Override
public void onDestroyView() {
super.onDestroyView();
unbinder.unbind();//视图销毁时必须解绑
}
2.3 在Adapter的ViewHolder中绑定ButterKnife
public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ViewHolder> {
private Context context;
private List<Item> datas;
public ItemAdapter(Context context, List<Item> datas) {
this.context = context;
this.datas = datas;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_rv, parent,
false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
holder.img.setImageResource(datas.get(position).getImgId());
holder.tv.setText(datas.get(position).getContent());
holder.img.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context,"图片被点击了...",Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return datas.size();
}
class ViewHolder extends RecyclerView.ViewHolder {
@BindView(R.id.img)
ImageView img;
@BindView(R.id.tv)
TextView tv;
public ViewHolder(@NonNull View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
}
3. Butterknife具体使用
3.1 绑定View
1.单个控件id注解: @BindView()
@BindView(R.id.bt)Button bt;
2.布局内多个控件id注解; @BindViews()
@BindViews({R.id.butter,R.id.butter1,R.id.butter2})
List<Button> buttons;
3.2 绑定资源文件
1.绑定string 字符串:@BindString()
@BindString(R.string.app_name) //绑定资源文件中string字符串
String name;
2.绑定array数组:@BindArray()
<resources>
<string name="app_name">开眼视频</string>
<string-array name="weather">
<item>高温</item>
<item>低温</item>
<item>阴天</item>
<item>雨天</item>
<item>晴天</item>
</string-array>
</resources>
@BindArray(R.array.weather) //绑定string资源里面array数组
String [] weathers ;
3.绑定颜色值:@BindColor( )
@BindColor( R.color.colorPrimary) //绑定color文件中颜色值
int colorPrimary;
4.绑定Bitmap:@BindBitmap( )
@BindBitmap(R.mipmap.ic_launcher)
Bitmap bitmap;
5.其他资源绑定:
@BindBool(R.bool.is_tablet) boolean isTablet; //绑定真假boolean
@BindFont(R.font.comic_sans) Typeface comicSans; //绑定字体文字
@BindDimen(R.dimen.horizontal_gap) int gapPx //绑定尺寸
@BindDimen(R.dimen.horizontal_gap) float gap; //绑定尺寸
@BindAnim(R.anim.fade_in) Animation fadeIn; //绑定动画
@BindDrawable(R.drawable.placeholder) Drawable placeholder;//绑定Drawable
3.3 绑定监听事件
1.绑定控件点击事件:@OnClick( )
- 单个控件点击事件:
@OnClick(R.id.butter)
public void onClick(){
Toast.makeText(this, "绑定单个view事件", Toast.LENGTH_SHORT).show();
}
- 多个控件同一点击事件:
@OnClick({R.id.share_wechat,R.id.share_moments,R.id.share_weibo})
public void onClick(){
Toast.makeText(this, "都执行此事件", Toast.LENGTH_SHORT).show();
}
- 多个控件点击事件:
@OnClick({R.id.share_wechat,R.id.share_moments,R.id.share_weibo})
public void onClick(View v) {
switch (v.getId()){
case R.id.share_wechat:
sharePlatform(Wechat.NAME);
break;
case R.id.share_moments:
sharePlatform(WechatMoments.NAME);
break;
case R.id.share_weibo:
sharePlatform(SinaWeibo.NAME);
break;
}
}
2.绑定控件长按事件:@OnLongClick( )
@OnLongClick( R.id.button1 ) //给 button1 设置一个长按事件
public boolean onLongClick (){
Toast.makeText(this, "is a long click", Toast.LENGTH_SHORT).show();
return true ;
}
3.其他事件绑定
//选中,选中取消
@OnCheckedChanged(R.id.example)
public void onChecked(boolean checked) {
Toast.makeText(this, checked ? "Checked!" : "Unchecked!", Toast.LENGTH_SHORT).show();
}
//软键盘的功能按键
@OnEditorAction(R.id.example)
public boolean onEditorAction(KeyEvent key) {
Toast.makeText(this, "Pressed: " + key, Toast.LENGTH_SHORT).show();
return true;
}
//焦点改变
@OnFocusChange(R.id.example)
public void onFocusChanged(boolean focused) {
Toast.makeText(this, focused ? "Gained focus" : "Lost focus", Toast.LENGTH_SHORT).show();
}
//Item长按,返回true则可以拦截onItemClick
@OnItemLongClick(R.id.example_list)
public boolean onItemLongClick(int position) {
Toast.makeText(this, "Long clicked position " + position + "!", Toast.LENGTH_SHORT).show();
return true;
}
//Item点击事件
@OnItemClick(R.id.example_list)
public void onItemClick(int position) {
Toast.makeText(this, "Clicked position " + position + "!", Toast.LENGTH_SHORT).show();
}
//Item被选择事件
@OnItemSelected(R.id.example_list)
public void onItemSelected(int position) {
Toast.makeText(this, "Selected position " + position + "!", Toast.LENGTH_SHORT).show();
}
//EditText里面的文本变化事件
@OnTextChanged(R.id.example)
public void onTextChanged(CharSequence text) {
Toast.makeText(this, "Text changed: " + text, Toast.LENGTH_SHORT).show();
}
//页面改变事件
@OnPageChange(R.id.example_pager)
public void onPageSelected(int position) {
Toast.makeText(this, "Selected " + position + "!", Toast.LENGTH_SHORT).show();
}
//触摸事件
@OnTouch(R.id.example)
public boolean onTouch() {
Toast.makeText(this, "Touched!", Toast.LENGTH_SHORT).show();
return false;
}
3.4 Action接口与Setter接口
Action接口主要是为了对View或者Views进行管理初始化等操作,而Setter接口其实就是对view或者views的属性或者值进行操作.使用 ButterKnife.apply()方法启用接口.
ButterKnife.Action<View> action = new ButterKnife.Action<View>() {
@Override
public void apply(@NonNull View view, int index) {
if (view instanceof Button ){
Button button = (Button) view;
button.setText("点击我");
}
}
};
ButterKnife.Setter<View,Boolean> setter = new ButterKnife.Setter<View, Boolean>() {
@Override
public void set(@NonNull View view, Boolean value, int index) {
view.setEnabled(value);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
ButterKnife.apply(buttons,action);//初始化或修改每个view的属性值
ButterKnife.apply(buttons,setter,true);
}
4 ButterKnife Zelezny插件
打开Android studio:点击File--->Settings--->Plugins--->搜索 Butterknife Zelezny--->下载安装--->重启Android studio.
参考;
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