Android 如何禁用多媒体资料';什么项目?
我有一个图库,其中实现了一个扩展BaseAdapter的自定义适配器。对于某些项目,我希望它们被禁用,并且不可单击 重写isEnabled(int)方法无效。我仍然可以单击禁用的项目,然后,画廊将此项目集中在其中Android 如何禁用多媒体资料';什么项目?,android,gallery,baseadapter,Android,Gallery,Baseadapter,我有一个图库,其中实现了一个扩展BaseAdapter的自定义适配器。对于某些项目,我希望它们被禁用,并且不可单击 重写isEnabled(int)方法无效。我仍然可以单击禁用的项目,然后,画廊将此项目集中在其中 有什么想法吗?以下是gallery widget的相关源代码 public boolean onSingleTapUp(MotionEvent e) { if (mDownTouchPosition >= 0) { // An item tap
有什么想法吗?以下是gallery widget的相关源代码
public boolean onSingleTapUp(MotionEvent e) {
if (mDownTouchPosition >= 0) {
// An item tap should make it selected, so scroll to this child.
scrollToChild(mDownTouchPosition - mFirstPosition);
// Also pass the click so the client knows, if it wants to.
if (mShouldCallbackOnUnselectedItemClick || mDownTouchPosition == mSelectedPosition) {
performItemClick(mDownTouchView, mDownTouchPosition, mAdapter
.getItemId(mDownTouchPosition));
}
return true;
}
return false;
}
如您所见,在执行单击之前,库将滚动到点击的子项。
因此,真正禁用项目的唯一方法是扩展Gallery
并覆盖其中的onsingletaup(MotionEvent e)
@Override
public boolean onSingleTapUp(MotionEvent e) {
int itemPosition = pointToPosition((int) e.getX(), (int) e.getY());
if (item at itemPosition is disabled) {
// Do nothing.
return true;
}
return super.onSingleTapUp(e);
}
试着让我知道 尝试下面的代码,您可以在其中处理特定位置的单击事件。您还可以禁用特定项目
public class SplashActivity extends Activity{
private Activity _activity;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Gallery g = new Gallery(this);
g.setAdapter(new ImageAdapter(this));
setContentView(g);
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private Integer[] mImageIds = {
R.drawable.menu1,
R.drawable.menu2,
R.drawable.menu3,
R.drawable.menu4,
R.drawable.menu1,
R.drawable.menu2,
R.drawable.menu3,
R.drawable.menu4
};
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mImageIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageResource(mImageIds[position]);
i.setLayoutParams(new Gallery.LayoutParams(150, 100));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
if(position!=0){
i.setEnabled(false);
i.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(SplashActivity.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
return i;
}
}
}
尝试设置可聚焦(false);可能行得通这也行不通。调用onItemClick事件。您可以粘贴一些代码或到这个房间来吗