ButterKnife的使用

1.在Activity中使用注解
class ExampleActivity extends Activity {
  @InjectView(R.id.title) TextView title;
  @InjectView(R.id.subtitle) TextView subtitle;
  @InjectView(R.id.footer) TextView footer;
 
  @Override 
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.simple_activity);
    ButterKnife.inject(this);
  }
}

2.Fragment中使用注解
public class FancyFragment extends Fragment {
  @InjectView(R.id.button1) Button button1;
  @InjectView(R.id.button2) Button button2;
 
  @Override 
  View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fancy_fragment, container, false);
    ButterKnife.inject(this, view);
    return view;
  }
}

3.Adapter中使用注解
public class MyAdapter extends BaseAdapter {
  @Override 
  public View getView(int position, View view, ViewGroup parent) {
    ViewHolder holder;
    if (view != null) {
      holder = (ViewHolder) view.getTag();
    } else {
      view = inflater.inflate(R.layout.whatever, parent, false);
      holder = new ViewHolder(view);
      view.setTag(holder);
    }
 
    holder.name.setText("John Doe");
    return convertView;
  }
 
  static class ViewHolder {
    @InjectView(R.id.title) TextView name;
    @InjectView(R.id.job_title) TextView jobTitle;
 
    public ViewHolder(View view) {
      ButterKnife.inject(this, view);
    }
  }
}

4.点击事件注入
@OnClick(R.id.submit)
public void sayHi(Button button) {
  button.setText("Hello!");
}

5.多个控件具有相同的事件
@OnClick({ R.id.door1, R.id.door2, R.id.door3 })
public void pickDoor(DoorView door) {
  if (door.hasPrizeBehind()) {
    Toast.makeText(this, "You win!", LENGTH_SHORT).show();
  } else {
    Toast.makeText(this, "Try again", LENGTH_SHORT).show();
  }
}

6.使用ButterKnife混淆时proguard-project.txt配置
-dontwarn butterknife.internal.**
-keep class **$$ViewInjector { *; }
-keepnames class * { @butterknife.InjectView *;}