支付宝人脸认证（安卓）

支付宝人脸认证后端接入前端的实现

/**
     * 启动支付宝进行认证
     * @param url 开放平台返回的URL
     */
    private void doVerify(String url) {
        if (hasApplication()) {
            Intent action = new Intent(Intent.ACTION_VIEW);
            StringBuilder builder = new StringBuilder();
            // 这里使用固定appid 20000067
            builder.append("alipays://platformapi/startapp?appId=20000067&url=");
            builder.append(URLEncoder.encode(url));
            action.setData(Uri.parse(builder.toString()));
            startActivity(action);
        } else {
            // 处理没有安装支付宝的情况
            new AlertDialog.Builder(this)
                    .setMessage("是否下载并安装支付宝完成认证?")
                    .setPositiveButton("好的", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Intent action = new Intent(Intent.ACTION_VIEW);
                            action.setData(Uri.parse("https://m.alipay.com"));
                            startActivity(action);
                        }
                    }).setNegativeButton("算了", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            }).show();
        }
    }
	/**
     * 判断是否安装了支付宝
     * @return true 为已经安装
     */
    private boolean hasApplication() {
        PackageManager manager = getPackageManager();
        Intent action = new Intent(Intent.ACTION_VIEW);
        action.setData(Uri.parse("alipays://"));
        List list = manager.queryIntentActivities(action, PackageManager.GET_RESOLVED_FILTER);
        return list != null && list.size() > 0;
    }

 <!-- 用来认证完成返回的界面 -->
 <activity android:name=".CertificationActivity"
         android:launchMode="singleTask">
         <intent-filter>

             <!-- 随便设置 -->
             <data
                 android:host="name"
                 android:path="/path"
                 android:scheme="scheme" />
             <!-- 下面这几行必须得设置 -->
             <category android:name="android.intent.category.DEFAULT" />

             <action android:name="android.intent.action.VIEW" />

             <category android:name="android.intent.category.BROWSABLE" />
         </intent-filter>
     </activity>