android 在自各儿的程序中添加Widget

package com.test;import java.util.List;import android.app.Activity;import android.appwidget.AppWidgetHost;import android.appwidget.AppWidgetHostView;import android.appwidget.AppWidgetManager;import android.appwidget.AppWidgetProviderInfo;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.LinearLayout;public class AndroidImActivity extends Activity {    //	private WallpaperManager manager;		private static final int APPWIDGET_HOST_ID = 1024;	private AppWidgetHost  mAppWidgetHost ;		private AppWidgetManager manager;				int current;	    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        manager = AppWidgetManager.getInstance(this);        mAppWidgetHost = new AppWidgetHost(this, APPWIDGET_HOST_ID);        mAppWidgetHost.startListening();        current   = mAppWidgetHost.allocateAppWidgetId();//        manager = WallpaperManager.getInstance(this);    }    /*    private void deCodeImage(){    	InputStream in = getResources().openRawResource(R.drawable.logo);    	Bitmap image = BitmapFactory.decodeStream(in);    	int height = image.getHeight();    	int width = image.getWidth();    	image.getPixel(1, 1);    }        public void test(View v){    	deCodeImage();    	manager.setWallpaperOffsetSteps(1.0f / 2, 0);    	IBinder windowToken = v.getWindowToken();		manager.setWallpaperOffsets(windowToken ,  Math.max(0.f, Math.min(0.3f, 1.f)), 0);//		manager.sendWallpaperCommand(windowToken, "android.wallpaper.tap", -1, -1, -1,null);    	current++;    	if(current ==3) current=0;////    	try {////			manager.clear();////		} catch (IOException e) {////			e.printStackTrace();////		}    	    }*/        public void test(View v){//    	Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);    	 int appWidgetId = mAppWidgetHost.allocateAppWidgetId();//    	 intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId );//    	startActivityForResult(intent, 101);    	List<AppWidgetProviderInfo> insts = manager.getInstalledProviders();    	for(AppWidgetProviderInfo info :insts){    		if(info.provider.getClassName().equals("com.android.music.MediaAppWidgetProvider")){    			manager.bindAppWidgetId(appWidgetId, info.provider);    			break;    		}    	}    	System.out.println(appWidgetId);    	AppWidgetProviderInfo info =manager. getAppWidgetInfo(appWidgetId);		 AppWidgetHostView view = mAppWidgetHost.createView(this, appWidgetId,info);		 view.setAppWidget(appWidgetId, info);		 view.setMinimumHeight(info.minHeight);		 view.setMinimumWidth(info.minWidth);		 LinearLayout l = (LinearLayout) findViewById(R.id.roots);		 l.addView(view);    }        @Override    	protected void onActivityResult(int requestCode, int resultCode, Intent data) {    		System.out.println(requestCode +"==============="+ resultCode);    		if(requestCode == 101){    			int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);    			System.out.println(appWidgetId);    			 AppWidgetProviderInfo info =manager. getAppWidgetInfo(appWidgetId);    			 AppWidgetHostView view = mAppWidgetHost.createView(this, appWidgetId,info);    			 view.setAppWidget(appWidgetId, info);    			 view.setMinimumHeight(info.minHeight);    			 view.setMinimumWidth(info.minWidth);    			 LinearLayout l = (LinearLayout) findViewById(R.id.roots);    			 l.addView(view);    		}    	}}