Android Button监听的方式

<Button
        android:id="@+id/btn_test"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="test listener"
        android:onClick="test"
        />

public void test(View v){
        // to do something
        Toast.makeText(this, "xml绑定监听响应", Toast.LENGTH_SHORT).show();
}

Button btnTest = (Button) findViewById(R.id.btn_test);
btnTest.setOnClickListener(new OnClickListener() {
    
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
                
    }
});

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
　　　　 Button btnTest = (Button) findViewById(R.id.btn_test);
        Button btnDeploy = (Button) findViewById(R.id.btn_deploy);
        btnTest.setOnClickListener(listener);
        btnDeploy.setOnClickListener(listener);
　　}
    
    OnClickListener listener = new OnClickListener() {
        
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            switch (v.getId()) {
            case R.id.btn_test:
                
                break;
            case R.id.btn_deploy:
                
                break;
            default:
                break;
            }
            
        }
    };
}

public class MainActivity extends Activity implements OnClickListener{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
　　　　 Button btnTest = (Button) findViewById(R.id.btn_test);
        Button btnDeploy = (Button) findViewById(R.id.btn_deploy);
        btnTest.setOnClickListener(this);
        btnDeploy.setOnClickListener(this);
        
    }
    
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.btn_test:
            
            break;
        case R.id.btn_deploy:
            
            break;
        default:
            break;
        }
    }
}