public static boolean hasShortcut(Context context, String appName) {
		String readSettingsPermission = "com.android.launcher.permission.READ_SETTINGS";
		String authority = getAuthorityFromPermission2(context, readSettingsPermission);
		String url = "content://" + authority + "/favorites?notify=true";
		final Uri CONTENT_URI = Uri.parse(url);
		Cursor c = context.getContentResolver().query(CONTENT_URI, null, " title= ? ", new String[] { appName }, null);
		if (c != null && c.moveToNext()) {
			return true;
		}
		return false;
	}
	
	@SuppressLint("NewApi")
	private static String getAuthorityFromPermission2(Context context, String permission) {
		List<PackageInfo> packs = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
		if (packs != null) {
			for (PackageInfo pack : packs) {
				ProviderInfo[] providers = pack.providers;
				if (providers != null) {
					for (ProviderInfo provider : providers) {
						if (permission.equals(provider.readPermission))
							return provider.authority;
						if (permission.equals(provider.writePermission))
							return provider.authority;
					}
				}
			}
		}
		return null;
	}

2这是我自己想的方法，虽然思路走到一起了，但是多少有点出入：

	public static boolean hasShortcut(Context context, String appName) {
		String readSettingsPermission = "com.android.launcher.permission.READ_SETTINGS";
		String authority = getAuthorityFromPermission1(context, readSettingsPermission);
		String url = "content://" + authority + "/favorites?notify=true";
		final Uri CONTENT_URI = Uri.parse(url);
		Cursor c = context.getContentResolver().query(CONTENT_URI, null, " title= ? ", new String[] { appName }, null);
		if (c != null && c.moveToNext()) {
			return true;
		}
		return false;
	}

	private static String getAuthorityFromPermission1(Context context, String permission) {
		ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
		List<RunningAppProcessInfo> appProcessInfos = am.getRunningAppProcesses();
		for (int i = 0; i < appProcessInfos.size(); i++) {
			RunningAppProcessInfo appInfo = appProcessInfos.get(i);
			List<ProviderInfo> info = context.getPackageManager().queryContentProviders(appInfo.processName, appInfo.uid, PackageManager.GET_PROVIDERS);
			if (info != null) {
				for (int j = 0; j < info.size(); j++) {
					ProviderInfo provider = info.get(j);
					if (permission.equals(provider.readPermission)) {
						return provider.authority;
					}
					if (permission.equals(provider.writePermission)) {
						return provider.authority;
					}
				}
			}
		}
		return null;
	}