public class Act_Share extends Activity {

	private ShareCustomAdapter adapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.act_share);
		
		ImageView btn_back = (ImageView) findViewById(R.id.share_back);
		btn_back.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				finish();
			}
		});

		ListView shareList = (ListView) findViewById(R.id.act_share_list);
		List<AppInfo> shareAppInfos = getShareAppList();
		adapter = new ShareCustomAdapter(this, shareAppInfos);
		shareList.setAdapter(adapter);
		shareList.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				AppInfo appInfo = (AppInfo) adapter.getItem(position);
				Intent shareIntent = new Intent(Intent.ACTION_SEND);
				shareIntent.setComponent(new ComponentName(appInfo.packageName,
						appInfo.appLauncherClassName));
				shareIntent.setType("image/*");
				File file = new File("/sdcard/com.igoatech.wxrepack/shareimg.png");
				if (!file.exists()) {
					Bitmap bm = FileUtil.drawableToBitmap(getResources()
							.getDrawable(R.drawable.erweima));
					FileUtil.saveBitmap(bm, file);
				}
				Uri imageUri = Uri.fromFile(file);
				shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				shareIntent.putExtra(Intent.EXTRA_STREAM, imageUri);
				startActivity(shareIntent);
			}
		});
	}
	
	private List<AppInfo> getShareAppList() {
		List<AppInfo> shareAppInfos = new ArrayList<AppInfo>();
		PackageManager packageManager = getPackageManager();
		List<ResolveInfo> resolveInfos = getShareApps(this);
		if (null == resolveInfos) {
			return null;
		} else {
			for (ResolveInfo resolveInfo : resolveInfos) {
				AppInfo appInfo = new AppInfo();
				appInfo.packageName = resolveInfo.activityInfo.packageName;
				appInfo.appLauncherClassName = resolveInfo.activityInfo.name;
				appInfo.appName = resolveInfo.loadLabel(packageManager)
						.toString();
				appInfo.appIcon = resolveInfo.loadIcon(packageManager);
				shareAppInfos.add(appInfo);
			}
		}
		return shareAppInfos;
	}
	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");
		PackageManager pManager = context.getPackageManager();
		mApps = pManager.queryIntentActivities(intent,
				PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
		return mApps;
	}
}

XML：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/all_bg" >

    <LinearLayout
        android:id="@+id/share_title"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@color/main_bg"
        android:gravity="center_vertical" >

        <ImageView
            android:id="@+id/share_back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:background="@drawable/fanhui" />

        <TextView
            style="@style/all_title"
            android:text="@string/share" />
    </LinearLayout>

    <ListView
        android:id="@+id/act_share_list"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/share_title"
        android:layout_marginTop="4dp"
        android:background="#FFFFFF"
        android:cacheColorHint="#00000000"
        android:divider="@color/line"
        android:dividerHeight="1.0dip"
        android:fadingEdge="none"
        android:footerDividersEnabled="false"
        android:headerDividersEnabled="true" />

</RelativeLayout>

adapter:

public class ShareCustomAdapter extends BaseAdapter {

	private Context context;
	private List<AppInfo> list;

	public ShareCustomAdapter(Context context, List<AppInfo> list) {
		super();
		this.context = context;
		this.list = list;
	}

	@Override
	public int getCount() {
		return list.size();
	}

	@Override
	public Object getItem(int position) {
		return list.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View v, ViewGroup arg2) {

		if (v == null) {
			v = LayoutInflater.from(context).inflate(
					R.layout.share_item, null);
		}

		AppInfo item = list.get(position);

		ImageView iv = (ImageView) v.findViewById(R.id.share_item_icon);
		TextView tv = (TextView) v.findViewById(R.id.share_item_name);

		iv.setImageDrawable(item.appIcon);
		tv.setText(item.appName);
		v.setTag(item);

		return v;
	}

}

XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:orientation="horizontal">

    <ImageView 
		android:id="@+id/share_item_icon" 
		android:layout_width="45dp" 
		android:layout_height="45dp" 
		android:layout_marginLeft="3.0dip" 
		android:scaleType="fitXY" />
	<TextView 
		android:id="@+id/share_item_name" 
		android:layout_gravity="center_vertical"
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content" 
		android:text="分享" 
		android:singleLine="true" 
		android:textSize="14sp"
		android:textColor="@color/item_text"
		android:layout_marginLeft="5dip" />

</LinearLayout>

public class AppInfo {

	public String appName = "";
	public String packageName = "";
	public String versionName = "";
	public int versionCode = 0;
	public Drawable appIcon = null;
	public String date = "";
	public String size = "";
	public String iconUrl = "";
	public String downloadurl = "";
	public String brief = "";
	public int downloadPercent = 0;
	public boolean isInWhite = false;
	public PackageInfo packageInfo = null;
	public String isInstalled = "false";
	public String path = "";
	public PackageInfo packageinfo = null;
	public String appLauncherClassName = "";
	public int number = 0;
	public String filePath = "";
	public int installedType = 1;
	public int upgrade = 0;
	public boolean isChecked = false;

	public void print() {
		Log.v("app", "Name:" + appName + " Package:" + packageName);
		Log.v("app", "Name:" + appName + " versionName:" + versionName);
		Log.v("app", "Name:" + appName + " versionCode:" + versionCode);
	}

}

图片处理代码：

/**
	 * Drawableת��ΪBitmap
	 */
	public static Bitmap drawableToBitmap(Drawable drawable) {
		int width = drawable.getIntrinsicWidth();
		int height = drawable.getIntrinsicHeight();
		Bitmap bitmap = Bitmap.createBitmap(width, height, drawable
				.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
				: Bitmap.Config.RGB_565);
		Canvas canvas = new Canvas(bitmap);
		drawable.setBounds(0, 0, width, height);
		drawable.draw(canvas);
		return bitmap;

	}

	/** ���淽�� */
	public static void saveBitmap(Bitmap bm, File file) {
		// Log.e(TAG, "����ͼƬ");

		try {

			if (!file.exists()) {
				file.getParentFile().mkdirs();
				file.createNewFile();
			}

			FileOutputStream out = new FileOutputStream(file);
			bm.compress(Bitmap.CompressFormat.PNG, 90, out);
			out.flush();
			out.close();
			// Log.i(TAG, "�Ѿ�����");
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}