Android Integration

1.Download the SDK package and unzip it，what you get are:

    .
    |____alipaySdk-15.5.9-20181123210601.aar   // Dependency: Alipay SDK
    |____android-demo                          // Demo project
    |____scanforpay-sdk-0.1.0.aar              // scanforpay SDK

2.Put the two aar files into the libs directory in app module，and add code in your project build.gradle file.

    flatDir {
        dirs 'libs'
    }

1. Add dependencies in build.gradle of the module which need to use this SDK. ScanForPay sdk depends on okhttp3.

    compile(name: 'scanforpay-sdk-1.0', ext: 'aar')
    compile(name: 'alipaySdk-15.5.9-20181123210601', ext: 'aar')
    implementation("com.squareup.okhttp3:okhttp:3.10.0")

1. Add permissions that Alipay needs to AndroidManifest.xml

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
   

2. Call SDK methods to create payment.

    // New a ScanForPayPayTask object
    mTask = new ScanForPayPayTask(MainActivity.this);
    // Set Listener to deal the payment result
    mTask.setListener(new ScanForPayResultListener() {
        @Override
            public void onSuccess(ScanForPayResult result) {
                Log.d("MainActivity", "ScanForPayResult:" + result.toString());
   
                int status = result.getStatus(); // Payment status，1 indicates pay success
                String params = result.getParams(); // order information which should be passed to the server and used to check signature and query the order.
   
                if(status == 1 && !params.isEmpty()){
                    // TODO pass params to server to check signature and query result.
   
                    // Operations after successed
                    showAlert(MainActivity.this, "Payment success!");
                }
            }
   
            @Override
            public void onFail(ScanForPayResult result) {
                // Something to do after failed
                Log.d("MainActivity", "ScanForPayResult:" + result.toString());
                if(result.getCode() < 0){
                    // Errorcodes from Alipay are transformed to nagative, and there's no need to deal. Generally speaking, it's cancelled by users.
                }else{
                    // Fail
                    showAlert(MainActivity.this, "Fail：" + result.getMsg());
                }
            }
    });
    // Set to sandbox environment
    mTask.setSandBox(true);
   
    // Generate payment request string, it's an example here. 
    // This must implemente on merchant's server
    String request = buildRequest(WALLET_ALIPAY, "Test item", 0.01f);
    // Call pay method
    mTask.pay(request);