使用GestureDetector调用Longpress后调用滚动事件
使用GestureDetector调用Longpress后调用滚动事件
提问于 2017-04-25 15:09:57
在调用Longpress而不释放屏幕(使用手势检测器)之后，我应该如何调用滚动事件？
这是我的班级：
public class TestingGestureDetector extends AppCompatActivity implements GestureDetector.OnGestureListener {
TextView mTextView;
private GestureDetector mGestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_testing_gesture_detector);
mTextView = (TextView) findViewById(R.id.gesture);
mTextView.setOnTouchListener(a());
mGestureDetector = new GestureDetector(this, this); //
}
protected View.OnTouchListener a() {
return new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
mGestureDetector.onTouchEvent(event); //
if (event.getAction() == MotionEvent.ACTION_UP)
mTextView.setText("Release");
return true;
}
};
}
@Override
public boolean onDown(MotionEvent event) {
mTextView.setText("Press");
return true;
}
@Override
public void onShowPress(MotionEvent event) {
}
@Override
public boolean onSingleTapUp(MotionEvent event) {
return true;
}
@Override
public boolean onScroll(MotionEvent event1, MotionEvent event2, float distanceX, float distanceY) {
mTextView.setText("Move");
return true;
}
@Override
public void onLongPress(MotionEvent event) {
mTextView.setText("Long Press");
//mGestureDetector.setIsLongpressEnabled(false);
}
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY) {
return true;
}
}回答 1
Stack Overflow用户
发布于 2017-04-25 15:25:09
- 使用setIsLongpressEnabled(isLongpressEnabled)禁用gestureDetector上的长按压。
- 使用计时器或线程检查0.5s后按下的某些标志的状态。
尝试：
public boolean onTouchEvent(MotionEvent event) {
if (mGestureDetector.onTouchEvent(event)== true)
{
//Fling or other gesture detected (not logpress because it is disabled)
}
else
{
//Manually handle the event.
if (event.getAction() == MotionEvent.ACTION_DOWN)
{
//Remember the time and press position
Log.e("test","Action down");
}
if (event.getAction() == MotionEvent.ACTION_MOVE)
{
//Check if user is actually longpressing, not slow-moving
// if current position differs much then press positon then discard whole thing
// If position change is minimal then after 0.5s that is a longpress. You can now process your other gestures
Log.e("test","Action move");
}
if (event.getAction() == MotionEvent.ACTION_UP)
{
//Get the time and position and check what that was :)
Log.e("test","Action down");
}
}
return true;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/43614551
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