Android 在TextView上滑动/投掷也会随机运行其onLongClick
我有一个活动,我想能够听到它的滑动。在我的活动中有一个Android 在TextView上滑动/投掷也会随机运行其onLongClick,android,textview,swipe,touch-event,onlongclicklistener,Android,Textview,Swipe,Touch Event,Onlongclicklistener,我有一个活动,我想能够听到它的滑动。在我的活动中有一个ScrollView,一个大的TextView占据了该滚动视图的所有区域。为了在我的整个活动中启用滑动,我扩展了Activity类并定义了SwipeActivity,如下所示: public abstract class SwipeActivity extends Activity { private static final int SWIPE_MIN_DISTANCE = 120; private static final int SW
ScrollView
,一个大的TextView
占据了该滚动视图的所有区域。为了在我的整个活动中启用滑动,我扩展了Activity
类并定义了SwipeActivity
,如下所示:
public abstract class SwipeActivity extends Activity {
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private int SWIPE_THRESHOLD_VELOCITY;
private GestureDetector gestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gestureDetector = new GestureDetector(new SwipeDetector());
ViewConfiguration configuration = ViewConfiguration.get(this);
SWIPE_THRESHOLD_VELOCITY = configuration.getScaledMinimumFlingVelocity();
}
private class SwipeDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// Check movement along the Y-axis. If it exceeds
// SWIPE_MAX_OFF_PATH,
// then dismiss the swipe.
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// Swipe from right to left.
// The swipe needs to exceed a certain distance (SWIPE_MIN_DISTANCE)
// and a certain velocity (SWIPE_THRESHOLD_VELOCITY).
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
leftSwipe();
return true;
}
// Swipe from left to right.
// The swipe needs to exceed a certain distance (SWIPE_MIN_DISTANCE)
// and a certain velocity (SWIPE_THRESHOLD_VELOCITY).
if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
rightSwipe();
return true;
}
return false;
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
// TouchEvent dispatcher.
if (gestureDetector != null) {
if (gestureDetector.onTouchEvent(ev))
// If the gestureDetector handles the event, a swipe has been
// executed and no more needs to be done.
return true;
}
return super.dispatchTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
protected abstract void rightSwipe();
protected abstract void leftSwipe();
}
public class ContentActivity extends SwipeActivity implements OnLongClickListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Here I add a TextView programmatically to my Vertical ScrollView and set this activity to listen to its long clicks (touches)
ScrollView scrollView = (ScrollView) findViewById(R.id.content_scroll);
TextView textView = new TextView(ContentActivity.this);
textView.setText("Some Really Long Text!");
textView.setOnLongClickListener(this);
scrollView.addView(textView);
}
@Override
public boolean onLongClick(View v) {
return doLongClickAction();
}
@Override
public void rightSwipe() {
doSwipeAction();
}
@Override
public void leftSwipe() {
doSwipeAction();
}
}
现在我可以在任何扩展SwipeActivity的活动上捕获rightSwipe()
和leftSwipe()
。因此,我宣布我的主要活动如下:
public abstract class SwipeActivity extends Activity {
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private int SWIPE_THRESHOLD_VELOCITY;
private GestureDetector gestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gestureDetector = new GestureDetector(new SwipeDetector());
ViewConfiguration configuration = ViewConfiguration.get(this);
SWIPE_THRESHOLD_VELOCITY = configuration.getScaledMinimumFlingVelocity();
}
private class SwipeDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// Check movement along the Y-axis. If it exceeds
// SWIPE_MAX_OFF_PATH,
// then dismiss the swipe.
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// Swipe from right to left.
// The swipe needs to exceed a certain distance (SWIPE_MIN_DISTANCE)
// and a certain velocity (SWIPE_THRESHOLD_VELOCITY).
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
leftSwipe();
return true;
}
// Swipe from left to right.
// The swipe needs to exceed a certain distance (SWIPE_MIN_DISTANCE)
// and a certain velocity (SWIPE_THRESHOLD_VELOCITY).
if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
rightSwipe();
return true;
}
return false;
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
// TouchEvent dispatcher.
if (gestureDetector != null) {
if (gestureDetector.onTouchEvent(ev))
// If the gestureDetector handles the event, a swipe has been
// executed and no more needs to be done.
return true;
}
return super.dispatchTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
protected abstract void rightSwipe();
protected abstract void leftSwipe();
}
public class ContentActivity extends SwipeActivity implements OnLongClickListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Here I add a TextView programmatically to my Vertical ScrollView and set this activity to listen to its long clicks (touches)
ScrollView scrollView = (ScrollView) findViewById(R.id.content_scroll);
TextView textView = new TextView(ContentActivity.this);
textView.setText("Some Really Long Text!");
textView.setOnLongClickListener(this);
scrollView.addView(textView);
}
@Override
public boolean onLongClick(View v) {
return doLongClickAction();
}
@Override
public void rightSwipe() {
doSwipeAction();
}
@Override
public void leftSwipe() {
doSwipeAction();
}
}
现在,所有内容都显示良好,垂直scrollView
可以正确滚动,滑动操作和长时间单击可以在textView
上工作,除了一件事:
我在textView
上滑动了大约10次,3次它同时启动doLongClickAction()
和DosweepAction()
,这对用户来说一点都不友好。
我知道我的问题与触摸事件的碰撞有关,但经过数小时的研究和测试,我无法解决它。你能告诉我我的错在哪里吗
(我应该补充一点:当我在TextView上捕获点击而不是长时间点击时,一切正常,但当用户单击TextView内的链接时,TextView的onClick事件启动,然后浏览器打开!)