要将前景视图中的touchEvent(onClick)传递给后台视图,可以使用以下方法:
public class ForegroundView extends View {
private BackgroundView backgroundView;
public ForegroundView(Context context) {
super(context);
}
public ForegroundView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ForegroundView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setBackgroundView(BackgroundView backgroundView) {
this.backgroundView = backgroundView;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// 将事件传递给后台视图
if (backgroundView != null) {
backgroundView.onTouchEvent(event);
}
return super.onTouchEvent(event);
}
}
public class BackgroundView extends View {
public BackgroundView(Context context) {
super(context);
}
public BackgroundView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public BackgroundView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// 处理传递过来的事件
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// 处理按下事件
break;
case MotionEvent.ACTION_MOVE:
// 处理移动事件
break;
case MotionEvent.ACTION_UP:
// 处理抬起事件
break;
}
return true;
}
}
public class MainActivity extends AppCompatActivity {
private ForegroundView foregroundView;
private BackgroundView backgroundView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
foregroundView = findViewById(R.id.foreground_view);
backgroundView = findViewById(R.id.background_view);
// 将前景视图的对象传递给后台视图
foregroundView.setBackgroundView(backgroundView);
}
}
这样,当在前景视图中发生点击事件时,事件将传递给后台视图进行处理。