分享应用列表怎么在Android应用中获取

<&#63;xml version="1.0" encoding="utf-8"&#63;> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent"  
  android:layout_height="wrap_content" > 
 <ListView  
    android:id="@+id/share_list"  
    android:background="#2F4F4F"  
    android:fadingEdge="none"  
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:cacheColorHint="#00000000"  
    android:divider="#E2DD75"  
    android:dividerHeight="1.0dip"  
    android:headerDividersEnabled="true"  
    android:footerDividersEnabled="false" /> 
</LinearLayout> 

<&#63;xml version="1.0" encoding="utf-8"&#63;> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:gravity="center_vertical"  
  android:layout_width="wrap_content"  
  android:layout_height="wrap_content"  
  android:padding="2.0dip" > 
  <ImageView  
    android:id="@+id/share_item_icon"  
    android:layout_width="32.0dip"  
    android:layout_height="32.0dip"  
    android:layout_marginLeft="3.0dip"  
    android:scaleType="fitXY" /> 
  <TextView  
    android:id="@+id/share_item_name"  
    android:gravity="center"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:text="分享"  
    android:textColor="@color/white"  
    android:singleLine="true"  
    android:textSize="@dimen/s_size"  
    android:layout_marginLeft="3.0dip"  
    android:layout_marginRight="3.0dip" /> 
</LinearLayout> 

public List<ResolveInfo> getShareApps(Context context) {  
    List<ResolveInfo> mApps = new ArrayList<ResolveInfo>(); 
    Intent intent = new Intent(Intent.ACTION_SEND, null); 
    intent.addCategory(Intent.CATEGORY_DEFAULT); 
    intent.setType("text/plain"); 
//   intent.setType("*/*"); 
    PackageManager pManager = context.getPackageManager(); 
    mApps = pManager.queryIntentActivities(intent,  
        PackageManager.COMPONENT_ENABLED_STATE_DEFAULT); 
    return mApps; 
  } 

private List<AppInfo> getShareAppList() {  
    List<AppInfo> shareAppInfos = new ArrayList<AppInfo>(); 
    PackageManager packageManager = getPackageManager(); 
    List<ResolveInfo> resolveInfos = getShareApps(mContext); 
    if (null == resolveInfos) { 
      return null; 
    } else { 
      for (ResolveInfo resolveInfo : resolveInfos) { 
        AppInfo appInfo = new AppInfo(); 
        appInfo.setAppPkgName(resolveInfo.activityInfo.packageName); 
//       showLog_I(TAG, "pkg>" + resolveInfo.activityInfo.packageName + ";name>" + resolveInfo.activityInfo.name); 
        appInfo.setAppLauncherClassName(resolveInfo.activityInfo.name); 
        appInfo.setAppName(resolveInfo.loadLabel(packageManager).toString()); 
        appInfo.setAppIcon(resolveInfo.loadIcon(packageManager)); 
        shareAppInfos.add(appInfo); 
      } 
    }     
    return shareAppInfos; 
  } 

private void initSharePopupWindow(View parent) { 
    PopupWindow sharePopupWindow = null; 
    View view = null; 
    ListView shareList = null; 
    if(null == sharePopupWindow) { 
      //加载布局文件 
      view = LayoutInflater.from(DetailExchangeActivity.this).inflate(R.layout.popup_share, null); 
      shareList = (ListView) view.findViewById(R.id.share_list); 
      List<AppInfo> shareAppInfos = getShareAppList(); 
      final ShareCustomAdapter adapter = new ShareCustomAdapter(mContext, shareAppInfos); 
      shareList.setAdapter(adapter); 
       
      shareList.setOnItemClickListener(new OnItemClickListener() { 
 
        @Override 
        public void onItemClick(AdapterView<&#63;> parent, View view, 
            int position, long id) { 
          // TODO Auto-generated method stub 
          Intent shareIntent = new Intent(Intent.ACTION_SEND); 
          AppInfo appInfo = (AppInfo) adapter.getItem(position); 
          shareIntent.setComponent(new ComponentName(appInfo.getAppPkgName(), appInfo.getAppLauncherClassName())); 
          shareIntent.setType("text/plain"); 
//         shareIntent.setType("*/*"); 
          //这里就是组织内容了， 
          shareIntent.putExtra(Intent.EXTRA_TEXT, "test"); 
          shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
          DetailExchangeActivity.this.startActivity(shareIntent); 
        } 
      }); 
       
      sharePopupWindow = new PopupWindow(view,  
          (int)(160 * density), LinearLayout.LayoutParams.WRAP_CONTENT); 
    } 
    //使其聚焦 
    sharePopupWindow.setFocusable(true); 
    //设置允许在外点击消失 
    sharePopupWindow.setOutsideTouchable(true); 
    // 这个是为了点击“返回Back”也能使其消失，并且并不会影响你的背景 
    sharePopupWindow.setBackgroundDrawable(new BitmapDrawable()); 
    //xoff,yoff基于anchor的左下角进行偏移。正数表示下方右边，负数表示（上方左边） 
    //showAsDropDown(parent, xPos, yPos); 
    sharePopupWindow.showAsDropDown(parent, -5, 5); 
  }