收银台 Android 组件

<manifest package="com.your.app">
    <queries>
        <package android:name="com.tencent.mm" />
    </queries>
</manifest>

implementation(name: "WecardPay-release-v0.x.x", ext: "aar")
implementation(name: "msepay-sdk-android-1.0.2", ext: "aar")

implementation 'com.tencent.mm.opensdk:wechat-sdk-android:6.8.0'

package com.tencent.wecard.platform;
 
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
 
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
 
import com.tencent.wecard.wecardpay.WecardPay;
 
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import android.widget.Toast;
 
import java.util.HashMap;
 
public class MainActivity extends AppCompatActivity {
 
    // 定义变量保存拉起支付需要的参数
    private HashMap<String, Object> paymentParams = null;
 
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
 
        // 初始化 WecardPay, 参数为微信开放平台申请的appId
        WecardPay.init(this.getApplicationContext(), "wx02563b8cf7b1048b");
 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        // 提前请求 预支付订单 参数
        requestPreOrder();
 
        TextView tvView = findViewById(R.id.C2BPay);
        tvView.setOnClickListener(v -> {
            // 检查是否有支付参数并拉起支付
            if (paymentParams != null) {
                WecardPay.openPayment(MainActivity.this, paymentParams, new WecardPay.PayStatusChangeCallback() {
                    @Override
                    public void onPayStatusChange(String value) {
                        // 支付状态变更回调
                        Log.d("MainActivity", "onPayStatusChange: " + value);
                        // toast
                        Toast.makeText(MainActivity.this, "支付状态改变: " + value, Toast.LENGTH_SHORT).show();
                    }
                });
            } else {
                // 可以在这里处理没有预支付订单的情况
                Log.d("MainActivity", "Payment parameters are not ready.");
                // toast
                Toast.makeText(MainActivity.this, "Payment parameters are not ready.", Toast.LENGTH_SHORT).show();
                requestPreOrder();
            }
        });
    }
 
    @Override
    protected void onResume() {
        super.onResume();
        // 每次Activity回到前台时请求最新的预支付订单
        requestPreOrder();
    }
 
    private void requestPreOrder() {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://typ.wecard.tencent.com/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
 
        WeCardService service = retrofit.create(WeCardService.class);
        PreOrderRequest request = new PreOrderRequest("openPayment");
 
        service.getPreOrder(request).enqueue(new Callback<PreOrderResponse>() {
            @Override
            public void onResponse(Call<PreOrderResponse> call, Response<PreOrderResponse> response) {
                // 打印请求结果
                Log.d("MainActivity", "onResponse: " + response.body());
 
                if (response.isSuccessful() && response.body() != null) {
                    PreOrderResponse preOrderResponse = response.body();
                    if (preOrderResponse.getCode() == 0
                            && "SUCCESS".equals(preOrderResponse.getData().getResponse().getErrCode())) {
                        PreOrderResponse.Result result = preOrderResponse.getData().getResponse().getResult();
                        paymentParams = new HashMap<>();
                        paymentParams.put("OutOrderId", result.getOutOrderId());
                        paymentParams.put("OrderStatus", result.getOrderStatus());
                        paymentParams.put("FailReason", result.getFailReason());
                        paymentParams.put("PayInfo", result.getPayInfo());
                    }
                }
            }
 
            @Override
            public void onFailure(Call<PreOrderResponse> call, Throwable t) {
                // 处理请求失败的情况
                Log.e("MainActivity", "onFailure: " + t.getMessage());
                Toast.makeText(MainActivity.this, "Request failed.", Toast.LENGTH_SHORT).show();
            }
        });
    }
}