GridView MultiTouch Test

GridViewActivity.java

/*
 *  ref
 *   http://www.mkyong.com/android/android-gridview-example/
 *   http://blog.fujiu.jp/2011/11/android.html
 *   http://d.hatena.ne.jp/xuwei/20120316/1331868246
 *   http://stackoverflow.com/questions/5730240/android-get-bounding-rectangle-of-a-view
 */


import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
 
public class GridViewActivity extends Activity {
	private String TAG="GridViewActivity";
	
	Activity activity;
	GridView gridView;
	TextView viewText;
 
	static final String[] numbers = new String[] { 
			"A", "B", "C", "D", "E",
			"F", "G", "H", "I", "J",
			"K", "L", "M", "N", "O",
			"P", "Q", "R", "S", "T",
			"U", "V", "W", "X", "Y", "Z"};
 
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
 
		setContentView(R.layout.gview);
		activity=this;
 
		gridView = _findViewById(R.id.gridView1);
 
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, numbers);
 
		gridView.setAdapter(adapter);
		
		viewText = _findViewById(R.id.viewText);
		
		
		gridView.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
				int gridView, long id) {
			  CharSequence tx = v==null ? "" : ((TextView) v).getText();
			  Log.v(TAG,"onItemClick:("+gridView + ","+ id + "," + tx + ")");
//			  Toast.makeText(activity,tx, Toast.LENGTH_SHORT).show();
			  if("".equals(tx))return;
			  viewText.setText(viewText.getText() + ","+tx);
			}
		});
		
		gridView.setOnTouchListener(new OnTouchListener() {
			public boolean onTouch(View v, MotionEvent event){
				

				switch (event.getAction()) {
					case MotionEvent.ACTION_DOWN:
					case MotionEvent.ACTION_POINTER_DOWN:
					case MotionEvent.ACTION_POINTER_2_DOWN:
					case MotionEvent.ACTION_POINTER_3_DOWN:
					case 0x305:
					case 0x405:
						Log.v(TAG,"onTouch:ACTION_DOWN");
						if(Build.VERSION.SDK_INT>=5){
							int pointCount = event.getPointerCount();
							for (int p = 0; p < pointCount; p++) {
								int px=(int)event.getX(p);
								int py=(int)event.getY(p);
								clickItemView(px, py);
							}
						}
						else{
							int px=(int)event.getX();
							int py=(int)event.getY();
							clickItemView(px, py);
						}
						
						break;
				}
						
				
//				int pv = gridView.pointToPosition((int)event.getX(), (int)event.getY());
//				long id = gridView.pointToRowId((int)event.getX(), (int)event.getY());
//				View lv = gridView.getChildAt(pv);
//				gridView.performItemClick(lv, pv, id);
				return true;
			}
		});
		
 
	}
	
	private void clickItemView(int px, int py) {
		int pv = gridView.pointToPosition(px,py);
		long id = gridView.pointToRowId(px,py);
		View lv = gridView.getChildAt(pv);
		Log.v(TAG,"HIT:"+isViewContains(lv,px,py));
		gridView.performItemClick(lv, pv, id);
	}
	
	private boolean isViewContains(View view, int rx, int ry) {
		if(view==null)return false;
//	    int[] l = new int[2];
//	    view.getLocationOnScreen(l);
	    int x = view.getLeft();// l[0];
	    int y = view.getTop();//l[1];
	    int w = view.getWidth();
	    int h = view.getHeight();

	    Log.v(TAG,"(x,y,x+w,y+h,rx,ry)=("+x+","+y+","+(x+w)+","+(y+h)+","+rx+","+ry+")");
	    
	    if (rx < x || rx > x + w || ry < y || ry > y + h) {
	        return false;
	    }
	    return true;
	}
	
	protected <T extends View> T _findViewById(final int id){
	    return (T)findViewById(id);
	}

 
}

gview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:orientation="vertical"
    >
    
    
<GridView 
    android:id="@+id/gridView1"
    android:numColumns="auto_fit"
    android:gravity="center"
    android:columnWidth="50dp"
    android:stretchMode="columnWidth"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />


<TextView
    android:id="@+id/viewText"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>

</LinearLayout>