Question

我正在尝试添加双击列表视图项目...

这是我简单的尝试

这里我没有得到代码中的实际问题......

//手势探测器上的消息不推荐使用构造函数GestureDetector（GestureDetector.OnGestureListener）

1.数据加载

setListData();
    Resources res=getResources();
    log_adapter = new Logadapter(screen,arr_list,res);
    list.setAdapter(log_adapter);

手势检测器（检测双击）

gestureScanner = new GestureDetector(this);
gestureScanner.setOnDoubleTapListener(new OnDoubleTapListener(){ 
    public boolean onDoubleTap(MotionEvent e) { 
        LayoutInflater inflater = (LayoutInflater)screen.getSystemService(screen.LAYOUT_INFLATER_SERVICE);
        layout =  inflater.inflate(R.layout.snap_log_viewer,null);

        AlertDialog.Builder builder = new AlertDialog.Builder(SnapLog_Activity.this);
        builder.setView(layout);

        AlertDialog alertDialog = builder.create(); 
        alertDialog.show();

        WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
        Window window = alertDialog.getWindow();
        lp.copyFrom(window.getAttributes());

        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        window.setAttributes(lp);


        return true; 
    } 
    public boolean onDoubleTapEvent(MotionEvent e) { 
        LayoutInflater inflater = (LayoutInflater)screen.getSystemService(screen.LAYOUT_INFLATER_SERVICE);
        layout =  inflater.inflate(R.layout.snap_log_viewer,null);

        AlertDialog.Builder builder = new AlertDialog.Builder(SnapLog_Activity.this);
        builder.setView(layout);

        AlertDialog alertDialog = builder.create(); 
        alertDialog.show();

        WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
        Window window = alertDialog.getWindow();
        lp.copyFrom(window.getAttributes());

        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        window.setAttributes(lp);
        System.out.println("log1");
        return false; 

    } 
    public boolean onSingleTapConfirmed(MotionEvent e) { 

         return false; 
    } });

错误在哪里...... 布局显示为null ... 调试.....

双击不在列表视图上工作

0 个答案: