Hi,everyone.
I am new to android.
I implemented a gridview with 7 rows and 3 columns(7,3).
I am trying to get item in gridview on touch.
I can get item but it is not what I want.
for example
when I touched (2,2),I should get (2,2) but I got item of (3,2) .
Please check my source code as following,any idea is welcome.
public class GridviewflickActivity extends Activity implements
OnGestureListener{
private GridView gv;
private GestureDetector gestureDetecotr;
private GestureDetector.OnGestureListener gl;
private ImageView imageview;
private int dragposition;
private ImageAdapter ia;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
gv=(GridView)findViewById(R.id.drag_grid);
ia=new ImageAdapter(this);
gv.setAdapter(ia);
gestureDetecotr = new GestureDetector(this);
}
public boolean dispatchTouchEvent(MotionEvent ev) {
System.out.println("dispatchTouchEvent");
return gestureDetecotr.onTouchEvent(ev);
}
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 mThumbIds[position];
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup
parent) {
ImageView imageView1;
if (convertView == null) {
imageView1 = new ImageView(mContext);
imageView1.setLayoutParams(new
GridView.LayoutParams(85, 85));
imageView1.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView1.setPadding(8, 8, 8, 8);
} else {
imageView1 = (ImageView) convertView;
}
imageView1.setImageResource(mThumbIds[position]);
return imageView1;
}
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
};
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float
velocityX,
float velocityY) {
System.out.println("onFling");
int x=(int)e1.getX();
int y=(int)e1.getY();
dragposition=gv.pointToPosition(x, y);
if (dragposition==gv.INVALID_POSITION){
return false;
}
int cnt=gv.getChildCount();
int fvp=gv.getFirstVisiblePosition();
imageview=(ImageView)gv.getChildAt(dragposition-fvp);
System.out.println("X: "+ x +" Y: " + y +" dragposition: "
+dragposition+" fvp: " +fvp);
................
................
return true;
}
}
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