Android中的UPI付款集成

如果您要在android应用程序中出售任何产品或提供任何服务，那么您应该已经在android应用程序中集成了一项功能，您可以在其中允许用户通过您的应用程序进行付款。在本文中，我们将介绍Android中支付网关集成的实现。在本文中，我们将使用Easy UPI Payment网关库添加此功能。

我们将在本文中构建什么?

我们将创建一个简单的应用程序，其中将显示多个编辑文本字段，我们将在其中允许用户输入进行付款的详细信息。点击“付款”按钮后，我们将向用户显示一个对话框，供用户通过安装在用户设备中的不同应用进行付款。下面是视频，我们将在其中观看我们将要构建的内容。

分步实施

步骤1：创建一个新项目

要在Android Studio中创建新项目，请参阅如何在Android Studio中创建/启动新项目。请注意，选择Java作为编程语言。

步骤2：在Android中为轻松付款网关添加依赖项

导航至应用程序> Gradle脚本> build.gradle(：app)，然后在“依赖项”部分添加以下依赖项。

implementation ‘com.shreyaspatil:EasyUpiPayment:2.0’

添加此依赖项后，现在同步您的项目，现在我们将朝着添加Internet权限的方向发展。

步骤3：在AndroidManifest.xml中添加互联网权限。

导航到app> AndroidManifest.xml，然后将以下代码添加到其中。

步骤4：使用activity_main.xml文件

导航到应用程序> res>布局> activity_main.xml，然后将以下代码添加到该文件中。以下是activity_main.xml文件的代码。

步骤5：使用MainActivity。 Java文件

转到MainActivity。 Java文件并参考以下代码。下面是MainActivity的代码。 Java文件。在代码内部添加了注释，以更详细地了解代码。

Java

import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
  
import androidx.appcompat.app.AppCompatActivity;
  
import com.shreyaspatil.EasyUpiPayment.EasyUpiPayment;
import com.shreyaspatil.EasyUpiPayment.listener.PaymentStatusListener;
import com.shreyaspatil.EasyUpiPayment.model.TransactionDetails;
  
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
  
public class MainActivity extends AppCompatActivity implements PaymentStatusListener {
      
    // initializing variables for our edit text and button.
    private EditText amountEdt, upiEdt, nameEdt, descEdt;
    private TextView transactionDetailsTV;
  
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
          
        // initializing all our variables.
        amountEdt = findViewById(R.id.idEdtAmount);
        upiEdt = findViewById(R.id.idEdtUpi);
        nameEdt = findViewById(R.id.idEdtName);
        descEdt = findViewById(R.id.idEdtDescription);
        Button makePaymentBtn = findViewById(R.id.idBtnMakePayment);
        transactionDetailsTV = findViewById(R.id.idTVTranscationDetails);
          
        // on below line we are getting date and then we are setting this date as transaction id.
        Date c = Calendar.getInstance().getTime();
        SimpleDateFormat df = new SimpleDateFormat("ddMMyyyyHHmmss", Locale.getDefault());
        String transcId = df.format(c);
          
        // on below line we are adding click listener for our payment button.
        makePaymentBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // on below line we are getting data from our edit text.
                String amount = amountEdt.getText().toString();
                String upi = upiEdt.getText().toString();
                String name = nameEdt.getText().toString();
                String desc = descEdt.getText().toString();
                // on below line we are validating our text field.
                if (TextUtils.isEmpty(amount) && TextUtils.isEmpty(upi) && TextUtils.isEmpty(name) && TextUtils.isEmpty(desc)) {
                    Toast.makeText(MainActivity.this, "Please enter all the details..", Toast.LENGTH_SHORT).show();
                } else {
                    // if the edit text is not empty then
                    // we are calling method to make payment.
                    makePayment(amount, upi, name, desc, transcId);
                }
            }
        });
    }
  
    private void makePayment(String amount, String upi, String name, String desc, String transcationId) {
        // on below line we are calling an easy payment method and passing 
        // all parameters to it such as upi id,name, description and others.
        final EasyUpiPayment easyUpiPayment = new EasyUpiPayment.Builder()
                .with(this)
                // on below line we are adding upi id.
                .setPayeeVpa(upi)
                // on below line we are setting name to which we are making oayment.
                .setPayeeName(name)
                // on below line we are passing transaction id.
                .setTransactionId(transcationId)
                // on below line we are passing transaction ref id.
                .setTransactionRefId(transcationId)
                // on below line we are adding description to payment.
                .setDescription(desc)
                // on below line we are passing amount which is being paid.
                .setAmount(amount)
                // on below line we are calling a build method to build this ui.
                .build();
        // on below line we are calling a start 
        // payment method to start a payment.
        easyUpiPayment.startPayment();
        // on below line we are calling a set payment
        // status listener method to call other payment methods.
        easyUpiPayment.setPaymentStatusListener(this);
    }
  
    @Override
    public void onTransactionCompleted(TransactionDetails transactionDetails) {
        // on below line we are getting details about transaction when completed.
        String transcDetails = transactionDetails.getStatus().toString() + "\n" + "Transaction ID : " + transactionDetails.getTransactionId();
        transactionDetailsTV.setVisibility(View.VISIBLE);
        // on below line we are setting details to our text view.
        transactionDetailsTV.setText(transcDetails);
    }
  
    @Override
    public void onTransactionSuccess() {
        // this method is called when transaction is successful and we are displaying a toast message.
        Toast.makeText(this, "Transaction successfully completed..", Toast.LENGTH_SHORT).show();
    }
  
    @Override
    public void onTransactionSubmitted() {
        // this method is called when transaction is done 
        // but it may be successful or failure.
        Log.e("TAG", "TRANSACTION SUBMIT");
    }
  
    @Override
    public void onTransactionFailed() {
        // this method is called when transaction is failure.
        Toast.makeText(this, "Failed to complete transaction", Toast.LENGTH_SHORT).show();
    }
  
    @Override
    public void onTransactionCancelled() {
        // this method is called when transaction is cancelled.
        Toast.makeText(this, "Transaction cancelled..", Toast.LENGTH_SHORT).show();
    }
  
    @Override
    public void onAppNotFound() {
        // this method is called when the users device is not having any app installed for making payment.
        Toast.makeText(this, "No app found for making transaction..", Toast.LENGTH_SHORT).show();
    }
}

现在运行您的应用程序，并查看该应用程序的输出。

Note: Make sure to run your app on a real device and you should be having an app for making payments. And put the amount in decimal.

输出：