在Android Studio中调试应用内购买时，可以使用谷歌提供的测试帐号来进行模拟购买，以确保应用内购买功能正常工作。以下是一些示例代码，可以帮助您进行调试。

1. 在应用程序的build.gradle文件中添加以下依赖：

dependencies {
    // Google Play Billing Library
    implementation 'com.android.billingclient:billing:4.0.0'
    ...
}

2. 创建BillingManager类，该类将负责与Google Play Billing Library交互。此类将负责购买操作以及检索SKU信息和购买历史记录。

public class BillingManager implements PurchasesUpdatedListener {
 
    private final BillingClient mBillingClient;
    private final Activity mActivity;
 
    public BillingManager(Activity activity) {
        mActivity = activity;
        mBillingClient = BillingClient.newBuilder(mActivity).setListener(this).build();
        initBillingClient();
    }
 
    private void initBillingClient() {
        mBillingClient.startConnection(new BillingClientStateListener() {
            @Override
            public void onBillingSetupFinished(BillingResult billingResult) {
                if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK) {
                    // The BillingClient is ready. You can query purchases here.
                }
            }
 
            @Override
            public void onBillingServiceDisconnected() {
                // Try to restart the connection on the next request to
                // Google Play by calling the startConnection() method.
            }
        });
    }
    
    ...
    
}

3. 在Activity中使用BillingManager类来进行购买操作。在此处，使用指定的SKU ID进行购买操作，该ID在Google Play Console中创建。

public class MainActivity extends AppCompatActivity implements PurchasesUpdatedListener {
 
    private BillingManager mBillingManager;
    private Button mButtonBuy;
    private String mSkuId = "test_sku";
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mBillingManager = new BillingManager