compile files('libs/alipaySdk-20170623-proguard.jar')

 <activity
      android:name="com.alipay.sdk.app.H5PayActivity"
      android:configChanges="orientation|keyboardHidden|navigation"
      android:exported="false"
      android:screenOrientation="behind"/>

    <activity
      android:name="com.alipay.sdk.auth.AuthActivity"
      android:configChanges="orientation|keyboardHidden|navigation"
      android:exported="false"
      android:screenOrientation="behind"/>

<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" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

-libraryjars libs/alipaySDK-20150602.jar

-keep class com.alipay.android.app.IAlixPay{*;}
-keep class com.alipay.android.app.IAlixPay$Stub{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback$Stub{*;}
-keep class com.alipay.sdk.app.PayTask{ public *;}
-keep class com.alipay.sdk.app.AuthTask{ public *;}

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

  private Button btnPay;
  private static final int SDK_PAY_FLAG = 1001;
  private String RSA_PRIVATE = "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";
  public static final String APPID = "2017062807585767";

  private Handler mHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      super.handleMessage(msg);
      switch (msg.what) {
        case SDK_PAY_FLAG:
          PayResult payResult = new PayResult((Map<String, String>) msg.obj);
          //同步获取结果
          String resultInfo = payResult.getResult();
          Log.i("Pay", "Pay:" + resultInfo);
          String resultStatus = payResult.getResultStatus();
          // 判断resultStatus 为9000则代表支付成功
          if (TextUtils.equals(resultStatus, "9000")) {
            Toast.makeText(MainActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
          } else {
            Toast.makeText(MainActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
          }
          break;
      }
    }
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
  }

  private void initView() {
    btnPay = (Button) findViewById(R.id.btnPay);
    btnPay.setOnClickListener(this);
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
      case R.id.btnPay:
        //秘钥验证的类型 true:RSA2 false:RSA
        boolean rsa = false;
        //构造支付订单参数列表
        Map<String, String> params = OrderInfoUtil2_0.buildOrderParamMap(APPID, rsa);
        //构造支付订单参数信息
        String orderParam = OrderInfoUtil2_0.buildOrderParam(params);
        //对支付参数信息进行签名
        String sign = OrderInfoUtil2_0.getSign(params, RSA_PRIVATE, rsa);
        //订单信息
        final String orderInfo = orderParam + "&" + sign;
        //异步处理
        Runnable payRunnable = new Runnable() {

          @Override
          public void run() {
            //新建任务
            PayTask alipay = new PayTask(MainActivity.this);
            //获取支付结果
            Map<String, String> result = alipay.payV2(orderInfo, true);
            Message msg = new Message();
            msg.what = SDK_PAY_FLAG;
            msg.obj = result;
            mHandler.sendMessage(msg);
          }
        };
        // 必须异步调用
        Thread payThread = new Thread(payRunnable);
        payThread.start();
        break;
    }
  }
}