Android listView scroll 恢復滾動位置

相信你們嘗試過許多方法恢復滾動位置，本人也找了許多方法，惟有這個方法好用，下面把代碼貼出來

聲明兩個變量

 

private int mPosition;
private int lvChildTop;

 

pause , resume方法

 

        @Override
	public void onPause() {
		// TODO Auto-generated method stub
		super.onPause();

		SharedPreferences mySharedPreferences = activity.getSharedPreferences(MY_PREFS, Activity.MODE_PRIVATE);
		SharedPreferences.Editor edit = mySharedPreferences.edit();
		edit.putInt("mPositionChildTop", lvChildTop);
		edit.putInt("mPosition", mPosition);

		edit.commit();
	}

	@Override
	public void onResume() {
		// TODO Auto-generated method stub
		super.onResume();

		SharedPreferences mySharedPreferences = activity.getSharedPreferences(MY_PREFS, Activity.MODE_PRIVATE); // MY_PREFES 是聲明的字符串
		lvChildTop = mySharedPreferences.getInt("mPositionChildTop", 0);
		mPosition = mySharedPreferences.getInt("mPosition", 0);
		listMessage.setSelectionFromTop(mPosition, lvChildTop); // listMessage 是listview ，
	}

 

listview 的監聽事件

 

private OnScrollListener lvScrollListener = new OnScrollListener() {

		@Override
		public void onScrollStateChanged(AbsListView view, int scrollState) {
			// TODO Auto-generated method stub
			// 不滾動時保存當前滾動到的位置
			if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
				mPosition = listMessage.getFirstVisiblePosition();
				View v = listMessage.getChildAt(0);
				lvChildTop = (v == null) ? 0 : v.getTop();
			}
		}

		@Override
		public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
			// TODO Auto-generated method stub

		}
	};