Android中创办和检测快捷方式

public class ShortcutUtil {	/**	 * 创建快捷方式	 * 	 * @param context	 */	public static void createShortcut(Context context, Class<?> target) {		// <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />		Intent intent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");		intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(context, R.drawable.icon));		intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, context.getString(R.string.app_name));		intent.putExtra("duplicate", false);		Intent sIntent = new Intent(Intent.ACTION_MAIN);		sIntent.addCategory(Intent.CATEGORY_LAUNCHER);// 加入action,和category之后，程序卸载的时候才会主动将该快捷方式也卸载		sIntent.setClass(context, target);		intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, sIntent);		context.sendBroadcast(intent);	}	/**	 * 判断桌面上是否有的快捷方式	 * 	 * @return	 */	public static boolean hasShortcut(Context context) {		final ContentResolver cr = context.getContentResolver();		final String AUTHORITY = "com.android.launcher.settings";		final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/favorites?notify=true");		// <uses-permission android:name="com.android.launcher.permission.READ_SETTINGS"/>		Cursor c = cr.query(CONTENT_URI, new String[] { "intent" }, null, null, null);		if (c == null) {			// 注: 2.1update和2.2版本的真机上测试无法访问com.android.launcher.settings，2.1update1的模拟器上可以			// ERROR/ActivityThread(1136): Failed to find provider info for com.android.launcher.settings			return false;		}		while (c.moveToNext()) {			String intentstring = c.getString(c.getColumnIndex("intent"));			if (intentstring == null) {				continue;			}			String componentString = getComponentString(intentstring);			if (componentString.startsWith(context.getPackageName())) {				return true;			}		}		return false;	}	private static String getComponentString(String intentInfo) {		// intent info 的格式:intent=#Intent;action=android.intent.action.MAIN;category=android.intent.category.LAUNCHER;launchFlags=0x10200000;component=com.allstar.tanzhi/.activities.StartActivity;end		int start = intentInfo.indexOf("component") + 9 + 1;		int end = intentInfo.indexOf(";", start);		return intentInfo.substring(start, end);	}

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