Android 检测是否安装微信、支付宝

检测设备上是否安装微信、支付宝的代码：

    /**
     * 检测是否安装支付宝
     * @param context
     * @return
     */
    public static boolean isAliPayInstalled(Context context) {
        Uri uri = Uri.parse("alipays://platformapi/startApp");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        ComponentName componentName = intent.resolveActivity(context.getPackageManager());
        return componentName != null;
    }

    /**
     * 检测是否安装微信
     * @param context
     * @return
     */
    public static boolean isWeixinAvilible(Context context) {
        final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (pn.equals("com.tencent.mm")) {
                    return true;
                }
            }
        }
        return false;
    }