当我调用购买屏幕时，我可以购买应用内产品并且一切正常，但是当用户离开应用并返回查看产品时，它一直要求他们再次购买，
我需要知道如何做到这一点，因此当用户购买应用程序时，商店屏幕不再出现并且他们可以访问产品，该应用程序的设计使得当用户购买应用程序时，他们可以访问新活动内置功能
如果有人可以提供帮助，我将不胜感激
我使用了本教程，这对我开始很有帮助：[TUT] Simple InApp Billing / Payment By blundell
这是我的代码
package com.IrishSign.app;
import java.util.Locale;
import com.IrishSign.app.BillingHelper;
import com.IrishSign.app.R;
import com.IrishSign.app.BillingService;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class IrishSignAppActivity extends Activity implements OnClickListener {
private static final String TAG = "BillingService";
private Context mContext;
private ImageView purchaseableItem;
private Button purchaseButton;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
Log.i("BillingService", "Starting");
setContentView(R.layout.main);
mContext = this;
Button A = (Button) findViewById(R.id.alphabet);
Button purchaseableItem = (Button) findViewById(R.id.topics);
Button Intro = (Button) findViewById(R.id.intro);
Button G = (Button) findViewById(R.id.about);
purchaseableItem.setOnClickListener(this);
startService(new Intent(mContext, BillingService.class));
BillingHelper.setCompletedHandler(mTransactionHandler);
A.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent1 = new Intent("com.IrishSign.app.alpha");
startActivity(intent1);
}
});
Intro.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent1 = new Intent("com.IrishSign.app.Intro");
startActivity(intent1);
}
});
G.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
AlertDialog alertDialog = new AlertDialog.Builder(
IrishSignAppActivity.this).setCancelable(false)
.create(); // Reads Update
alertDialog.setTitle("Welcome");
alertDialog.setMessage("-----");//
alertDialog.setButton("Continue",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int arg1) {
Intent intent5 = new Intent(
IrishSignAppActivity.this,
IrishSignAppActivity.class);
}
});
alertDialog.show(); // <-- Shows dialog on screen.
}
});
}
public Handler mTransactionHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
Log.i(TAG, "Transaction complete");
Log.i(TAG, "Transaction status: "
+ BillingHelper.latestPurchase.purchaseState);
Log.i(TAG, "Item purchased is: "
+ BillingHelper.latestPurchase.productId);
if (BillingHelper.latestPurchase.isPurchased()) {
Intent intent = new Intent("com.IrishSign.app.Topics");
startActivity(intent);
}
};
};
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.topics:
if (BillingHelper.isBillingSupported()) {
BillingHelper.requestPurchase(mContext,
"com.blundell.item.passport");
// android.test.purchased or android.test.canceled or
// android.test.refunded or com.blundell.item.passport
} else {
Log.i(TAG, "Can't purchase on this device");
purchaseButton.setEnabled(false); // XXX press button before
// service started will
// disable when it shouldnt
}
break;
default:
// nada
Log.i(TAG, "default. ID: " + v.getId());
break;
}
}
@Override
protected void onPause() {
Log.i(TAG, "onPause())");
super.onPause();
}
@Override
protected void onDestroy() {
BillingHelper.stopService();
super.onDestroy();
}
}