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;
}
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