android -> Simple way to bind click events to all Buttons in XML

 

In the XML file "display the onClick attribute of the specified button, so that when the button is clicked, the click() method in the corresponding Activity will be called by reflection"

 

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="onClick"
    android:text="Button1" />
 
  <Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="onClick"
    android:text="Button2" />

 

Here, when you finish typing android:, press Alt+/, there will be a prompt for the onClick attribute

 

public class TestButtonActivity extends Activity {
 
  Button btn1, btn2;
  Toast tst;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate (savedInstanceState);
    setContentView(R.layout.activity_test_button);
  }
 
  // Note that there is no @Override tag here
  public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
    case R.id.button1:
      tst = Toast.makeText(this, "111111111", Toast.LENGTH_SHORT);
      tst.show();
      break;
    case R.id.button2:
      tst = Toast.makeText(this, "222222222", Toast.LENGTH_SHORT);
      tst.show();
      break;
    default:
      break;
    }
  }
}

 

In this way, the click event of the button can be realized without declaring the button in the whole code.