以下扩展的linearlayout使用SimpleGestureListener来检测滑动事件。
public class MyLinearLayout extends LinearLayout implements SimpleGestureListener {
private SimpleGestureFilter detector;
private SwipeEvent listener;
@SuppressLint("NewApi")
public MyLinearLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
detector = new SimpleGestureFilter((Activity) context, this);
// TODO Auto-generated constructor stub
}
public MyLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
detector = new SimpleGestureFilter((Activity) context, this);
// TODO Auto-generated constructor stub
}
public MyLinearLayout(Context context) {
super(context);
detector = new SimpleGestureFilter((Activity) context, this);
// TODO Auto-generated constructor stub
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
this.detector.onTouchEvent(ev);
boolean ret = super.dispatchTouchEvent(ev);
Log.e("MLL","ret = "+String.valueOf(ret));
return /*super.dispatchTouchEvent(ev);*/ ret;
}
/*@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
this.detector.onTouchEvent(ev);
return super.onInterceptTouchEvent(ev);
}*/
@Override
public void onSwipe(int direction) {
// TODO Auto-generated method stub
Log.e("LinearLayout","Inside onSwipe");
switch (direction) {
case SimpleGestureFilter.SWIPE_RIGHT:
// Toast.makeText(getContext(), "Swipe Right", Toast.LENGTH_SHORT).show();
listener.onRightSwipe();
break;
case SimpleGestureFilter.SWIPE_LEFT:
// Toast.makeText(getContext(), "Swipe SWIPE_LEFT", Toast.LENGTH_SHORT).show();
listener.onLeftSwipe();
break;
case SimpleGestureFilter.SWIPE_DOWN:
// Toast.makeText(getContext(), "Swipe SWIPE_DOWN", Toast.LENGTH_SHORT).show();
listener.onDownSwipe();
//TODO As playerControls becomes null on each orientation switch, let's change playerControls to playerControlFragments
break;
case SimpleGestureFilter.SWIPE_UP:
// Toast.makeText(getContext(), "Swipe SWIPE_UP", Toast.LENGTH_SHORT).show();
listener.onUpSwipe();
break;
}
}
@Override
public void onDoubleTap() {
// TODO Auto-generated method stub
}
static public interface SwipeEvent {
public void onRightSwipe();
public void onLeftSwipe();
public void onDownSwipe();
public void onUpSwipe();
}
public void setSwipeEventListener(SwipeEvent listener) {
// TODO Auto-generated method stub
this.listener = listener;
}
}
问题是我无法使用放置在此布局中的Imagebutton的Onclick侦听器
<com.example.player.MyLinearLayout
android:id="@+id/details"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dip"
android:orientation="vertical"
android:animateLayoutChanges="true"
android:descendantFocusability="afterDescendants"
android:padding="3dip" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dip"
android:orientation="horizontal"
android:animateLayoutChanges="true"
android:padding="3dip"
>
<TextView
android:id="@+id/firstTitle"
android:layout_width="0dip"
android:layout_weight="0.8"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:ellipsize="marquee"
android:singleLine="true"
android:text="First"
android:clickable="true"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageButton
android:id="@+id/hideControl"
android:layout_weight="0.2"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
android:background="@android:color/transparent"
android:rotation="90"
android:src="@drawable/hide"
android:clickable="true"
/>
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dip" />
<TextView
android:id="@+id/secondTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left|bottom"
android:text="Second"
android:clickable="true"
android:textAppearance="?android:attr/textAppearanceSmall" />
</com.example.player.MyLinearLayout>
我正在听hideControls，但不知道为什么它没有被调用......
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Log.e(TAG, "Inside fragment'sonCreateView");
View rootView = inflater.inflate(R.layout.frag_layout,
container, false);
hideControl = (ImageButton) rootView.findViewById(R.id.hideControl);
hideControl.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.e(TAG,"PlayerControl clicked via listener");
}
});
其中frag_layout.xml包含MyLinearLayout，例如
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:orientation="horizontal" >
<LinearLayout
... >
</LinearLayout>
<com.example.player.MyLinearLayout
... />
</com.example.player.MyLinearLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:orientation="horizontal" >
...
</RelativeLayout>
<LinearLayout
... />
</LinearLayout>