增加控件可点击区域

一.使用TouchDelegate增加控件可点击区域

TouchDelegate API
TouchDelegate Demo

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Get the parent view
        View parentView = findViewById(R.id.parent_layout);

        parentView.post(new Runnable() {
            // Post in the parent's message queue to make sure the parent
            // lays out its children before you call getHitRect()
            @Override
            public void run() {
                // The bounds for the delegate view (an ImageButton
                // in this example)
                Rect delegateArea = new Rect();
                ImageButton myButton = (ImageButton) findViewById(R.id.button);
                myButton.setEnabled(true);
                myButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        Toast.makeText(MainActivity.this,
                                "Touch occurred within ImageButton touch region.",
                                Toast.LENGTH_SHORT).show();
                    }
                });

                // 获取子视图初始时的区域
                myButton.getHitRect(delegateArea);

           
                delegateArea.right += 100;
                delegateArea.bottom += 100;

                     
                                                                                                   增加后的区域 ，子控件
                TouchDelegate touchDelegate = new TouchDelegate(delegateArea,myButton);

     
                if (View.class.isInstance(myButton.getParent())) {
                    ((View) myButton.getParent()).setTouchDelegate(touchDelegate);///父容器设置代理
                }
            }
        });
    }
}

二.使用Padding

增加padding语气变大