Question

我想在用户按下它时删除gridView项目的阴影，然后在用户释放后恢复它。（不能使用selector.xml，因为项目具有用户选择的颜色）

此代码在第一次按下时会移除阴影，但在释放后会保持卡住而没有阴影。

gridItemView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if(event.getAction()==MotionEvent.ACTION_DOWN) {
                image.removeShadow();
                image.invalidate();
            }
            else if(event.getAction()==MotionEvent.ACTION_UP){
                image.setShadow();
                image.invalidate();

            }
            return false;
        }
    });

我无法将其设置为true，因为然后.nnItemClickListener在片段中运行。另外我通过在onItemClickListener中设置阴影来修复它，但是如果用户将拇指滑出项目而不是仅仅点击它将保持按下

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @TargetApi(Build.VERSION_CODES.HONEYCOMB)
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            MainActivity.selectedItem = position;
            if (lastView[0] != null) {
                lastView[0].setBackgroundResource(R.drawable.nullr);
            }
            picker.setOldCenterColor(MainActivity.items.get(MainActivity.selectedItem).getColor());
            picker.setColor(MainActivity.items.get(MainActivity.selectedItem).getColor());

            View imageContainer = view.findViewById(R.id.imageContainer);
            CircularImageView circleImage = (CircularImageView) view.findViewById(R.id.circleView);

            artistText.setText(MainActivity.items.get(position).getArtist());
            songText.setText(MainActivity.items.get(position).getSong());

            int backgroundColor = Color.parseColor("#FFEECC");
            GradientDrawable drawable = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, new int[]{backgroundColor, backgroundColor});
            drawable.setShape(GradientDrawable.OVAL);
            drawable.setStroke(25, MainActivity.items.get(MainActivity.selectedItem).getColor());

            imageContainer.setBackgroundDrawable(drawable);
            circleImage.setShadow();
            circleImage.invalidate();

            lastView[0] = imageContainer;
            MainActivity.anItemIsSelected = true;
        }
    });

Answer 1

你忘了

else if(event.getAction()==MotionEvent.ACTION_UP){
            image.setShadow();
            image.invalidate();
}

你可以在这里做的是尝试创建一个自定义Gridview并覆盖onTouchEvent，就像这样，（虽然它不准确）

public class MyGridv extends GridView{
    //implement all constructors;
    //the override onTouchEvent(MotionEvent event);
    @override
    protected boolean onTouchEvent(MotionEvent event){
    // put your ontouch code here and return true, you might need to do
     //some changes because you can not get access to your methods or 
     //you can make this class a private class to your mainActivity
     // now delete your ontouch for your gridview
    }
   }

这里的逻辑onTouchEvent()最初是在onTouchListener之前调用的，它是第一个被调用的，返回true然后会将事件传递给onTouch()和{{1}一切都会好起来的

希望它有用

Answer 2

尝试在视图上添加以下内容。

android:clickable="true"

检测到ACTION_DOWN但没有检测到ACTION_UP？ android gridView项目的onTouch

2 个答案: