[英]I want to display some text onDoubleClick event how to do so ? i have attached my sourcecode Along
我想在一個文本字段上應用doubleClick事件,該文本字段在double事件上顯示一些文本,但是它一直給我帶來錯誤,是否有任何方法可以簡單地做到這一點
TextView tv;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.mytext);
tv.setOnTouchListener(new OnDoubleTapListener() {
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
return true;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
tv.setText("DoubleTouch");
return true;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
tv.setText("Double Touch ");
return true;
}
}
);
}
您應該像這樣初始化手勢探測器
GestureDetector gd = new GestureDetector(this, new GestureDetector.OnGestureListener() {
@Override
public boolean onDown(MotionEvent motionEvent) {
return false;
}
@Override
public void onShowPress(MotionEvent motionEvent) {
}
@Override
public boolean onSingleTapUp(MotionEvent motionEvent) {
return false;
}
@Override
public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
return false;
}
@Override
public void onLongPress(MotionEvent motionEvent) {
}
@Override
public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
return false;
}
});
然后像這樣設置雙擊偵聽器
gd.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
@Override
public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
return false;
}
@Override
public boolean onDoubleTap(MotionEvent motionEvent) {
return false;
}
@Override
public boolean onDoubleTapEvent(MotionEvent motionEvent) {
return false;
}
});
最后,像這樣將偵聽器應用於視圖
tv.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
gd.onTouchEvent(event);
return false;
}
});
有關更多信息,請參考Android文檔檢測常見手勢
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