Android初学者：触摸android gridview中的事件

我使用以下代码来处理gridview(从http://developer.android.com/resources/tutorials/views/hello-gridview.html稍微修改).我想用它们的“触摸”等价物替换onClicklistener和onClick()方法,即touchlistener和onTouch(),这样当我触摸gridview中的元素时,元素的图像会发生变化,并且同一个元素上的双击会接受它回到原始状态.

我该怎么做呢？我无法让我的代码执行此操作. clicklistener在某种程度上起作用,但触摸不是.请帮忙.

public class ImageAdapter extends BaseAdapter {
private Context mContext;

public ImageAdapter(Context c) {
    mContext = c;
}

public int getCount() {
    return mThumbIds.length;
}

public Object getItem(int position) {
    return null;
}

public long getItemId(int position) {
    return 0;
}

// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {  // if it's not recycled, initialize some attributes
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(8, 8, 8, 8);

        imageView.setOnClickListener(new View.OnClickListener()
            {

              @Override
              public void onClick(View view) 
              {

                  if(position==0)
                  {
                                  //do this
                              }
                              else
                              {
                                //do this
                              }
                           }
                    });

    } else {
        imageView = (ImageView) convertView;
    }

    imageView.setImageResource(mThumbIds[position]);
    return imageView;
}

// references to our images
private Integer[] mThumbIds = {
        R.drawable.sample_2, R.drawable.sample_3,
        R.drawable.sample_4, R.drawable.sample_5,
        R.drawable.sample_6, R.drawable.sample_7,
        R.drawable.sample_0, R.drawable.sample_1,
        R.drawable.sample_2, R.drawable.sample_3,
        R.drawable.sample_4, R.drawable.sample_5,
        R.drawable.sample_6, R.drawable.sample_7,
        R.drawable.sample_0, R.drawable.sample_1,
        R.drawable.sample_2, R.drawable.sample_3,
        R.drawable.sample_4, R.drawable.sample_5,
        R.drawable.sample_6, R.drawable.sample_7
};
}

解决方法:

以这种方式使用OnTouchListener.阅读ACTION_UP,ACTION_MOVE和ACTION_DOWN之类的MotionEvent类型,这意味着在此处按下了键,移动了鼠标,或者在此处键入了键…

public void addListenerToGrid() {
    gridView = (GridView) findViewById(R.id.gridView1);

    gridView.setOnTouchListener(new OnTouchListener() {
        public boolean onTouch(View v, MotionEvent me) {

            int action = me.getActionMasked();
            float currentXPosition = me.getX();
            float currentYPosition = me.getY();
            int position = gridView.pointToPosition((int) currentXPosition, (int) currentYPosition);
                        if (action == MotionEvent.ACTION_UP) {
                            // Key was pressed here
                        }

            return true;

}

标签：onclick,touch,gridview,android,ontouchlistener
来源： https://codeday.me/bug/20190722/1498237.html