android 打开微信扫一扫

    public static void openWeixinQRCode(Context context) {
        try {
            Intent intent = context.getPackageManager().getLaunchIntentForPackage("com.tencent.mm");
            intent.putExtra("LauncherUI.From.Scaner.Shortcut", true);
            intent.setAction("android.intent.action.VIEW");
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }