問題:
Fragment中沒有提供監聽touch事件的方法。
解決方案:
Activity中可以監聽touch事件。
因而在Activity中寫一個接口,MyOnTouchListener,在須要監聽touch事件的fragment中實現這個窗口。
在Activity中實現以下方法:
[java] view plain copy
在CODE上查看代碼片派生到個人代碼片
/**
* 如下的幾個方法用來,讓fragment可以監聽touch事件
*/
private ArrayList<MyOnTouchListener> onTouchListeners = new ArrayList<MyOnTouchListener>(
10);
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
for (MyOnTouchListener listener : onTouchListeners) {
listener.onTouch(ev);
}
return super.dispatchTouchEvent(ev);
}
public void registerMyOnTouchListener(MyOnTouchListener myOnTouchListener) {
onTouchListeners.add(myOnTouchListener);
}
public void unregisterMyOnTouchListener(MyOnTouchListener myOnTouchListener) {
onTouchListeners.remove(myOnTouchListener);
}
public interface MyOnTouchListener {
public boolean onTouch(MotionEvent ev);
}
dispatchTouchEvent 能夠監聽全部的關於屏幕的行爲。。。。。
在Fragment中實現以下代碼:
[java] view plain copy
在CODE上查看代碼片派生到個人代碼片
private GestureDetector mGestureDetector;
MainActivity.MyOnTouchListener myOnTouchListener;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.e(TAG, "onCreateView");
View view = inflater.inflate(R.layout.fragment_contact, container,
false);
this.view = view;
mGestureDetector = new GestureDetector(getActivity(),
new SideIndexGestureListener());
listView = (ListView) view.findViewById(R.id.listview_contacts);
getDataFromSQLite();
spliceData();
showListView();
myOnTouchListener = new MainActivity.MyOnTouchListener() {
@Override
public boolean onTouch(MotionEvent ev) {
boolean result = mGestureDetector.onTouchEvent(ev);
return result;
}
};
((MainActivity) getActivity())
.registerMyOnTouchListener(myOnTouchListener);
return view;
}
java