Android Singletap/onclick In Webview

i am loading Web view with Html String,i want to show navigate buttons when the user tap on the web view,i tried With onTouch listener,touch event raises when scrolling and tapping

Solution 1:

WebView does not support the OnClickListener. And also it does consume touch events even though nothing happened on the web page thus ancestors views (like your LinearLayout) don't have any chance to produce an OnClick event. It is very unfortunate.

As a workaround I extended a RelativeLayout and put my WebView inside of it. In the RelativeLayout I've overwritten onInterceptTouchEvent and were looking for tap events. If a tap is detected then the RelativeLayout's OnClickListener is invoked with performClick().

publicclassTapAwareRelativeLayoutextendsRelativeLayout {

    privatefinalfloatMOVE_THRESHOLD_DP=20 * getResources().getDisplayMetrics().density;

    privateboolean mMoveOccured;
    privatefloat mDownPosX;
    privatefloat mDownPosY;

publicTapAwareRelativeLayout(Context context) {
    super(context);
}

publicTapAwareRelativeLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
}

@OverridepublicbooleanonInterceptTouchEvent(MotionEvent ev) {

    finalintaction= ev.getAction();
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mMoveOccured = false;
        mDownPosX = ev.getX();
        mDownPosY = ev.getY();
        break;
    case MotionEvent.ACTION_UP:
        if (!mMoveOccured) {
            // TAP occured
            performClick();
        }
        break;
    case MotionEvent.ACTION_MOVE:
        if (Math.abs(ev.getX() - mDownPosX) > MOVE_THRESHOLD_DP || Math.abs(ev.getY() - mDownPosY) > MOVE_THRESHOLD_DP) {
            mMoveOccured = true;
        }
        break;

    }
    returnsuper.onInterceptTouchEvent(ev);
}

}

Solution 2:

I modified Zsolt Safrany's answer and I put his onInterceptTouchEvent's content into webview's onTouch method and it worked.

webview.setOnTouchListener(newView.OnTouchListener() {
@OverridepublicbooleanonTouch(View v, MotionEvent event) {
    Log.v(TAG,"Got a touch event in the web view!");

    final int action = ev.getAction();
    switch (action) {
        caseMotionEvent.ACTION_DOWN:
           mMoveOccured = false;
           mDownPosX = ev.getX();
           mDownPosY = ev.getY();
       break;
       caseMotionEvent.ACTION_UP:
           if (!mMoveOccured) {
             //click operation is here
           }
      break;
      caseMotionEvent.ACTION_MOVE:
          if (Math.abs(ev.getX() - mDownPosX) > MOVE_THRESHOLD_DP || Math.abs(ev.getY() - mDownPosY) > MOVE_THRESHOLD_DP) {
          mMoveOccured = true;
      }
      break;
}
    returnfalse;
}           });

Solution 3:

From this page: http://www.codeshogun.com/blog/2009/04/16/how-to-implement-swipe-action-in-android/

It seems that touch events must be properly trapped. Check this out:

@OverridepublicbooleandispatchTouchEvent(MotionEvent e){
    super.dispatchTouchEvent(e);
    return mGestureDetector.onTouchEvent(e);
} 

Solution 4:

Worked code ::

finalBoolean[] mMoveOccured = newBoolean[1];
finalfloat[] mDownPosX = newfloat[1];
finalfloat[] mDownPosY = newfloat[1];

finalfloat MOVE_THRESHOLD_DP = 20 * getResources().getDisplayMetrics().density;

userPic.setOnTouchListener(new View.OnTouchListener() {
      @Override
      publicboolean onTouch(View v, MotionEvent event) {
           finalint action = event.getAction();
           switch (action) {
               case MotionEvent.ACTION_DOWN:
                    mMoveOccured[0] = false;
                    mDownPosX[0] = event.getX();
                    mDownPosY[0] = event.getY();
                    break;
               case MotionEvent.ACTION_UP:
                    if (!mMoveOccured[0]) {
                       Toast.makeText(v.getContext(), "Webview pressed", Toast.LENGTH_SHORT).show();
                    }
                    break;
               case MotionEvent.ACTION_MOVE:
                    if (Math.abs(event.getX() - mDownPosX[0]) > MOVE_THRESHOLD_DP || Math.abs(event.getY() - mDownPosY[0]) > MOVE_THRESHOLD_DP) {
                            mMoveOccured[0] = true;
                    }
                    break;
            }
            returnfalse;
      }
 });