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POIn App Purchase problems
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  1. POIn App Purchase problems
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    copied!<p>Working on my latest app I am implementing In app purchases.</p> <p>I have looked for good tutorials online and found one from Bundell.</p> <p>I went over the code quite a few times, but I keep getting an Error. Looks like this:</p> <pre><code>01-30 21:14:17.415: E/AndroidRuntime(680): FATAL EXCEPTION: main 01-30 21:14:17.415: E/AndroidRuntime(680): java.lang.RuntimeException: Unable to destroy activity {com.crosscommunications.adalert/com.crosscommunications.adalert.inapppurchaseStarter}: java.lang.NullPointerException 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:2672) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:2690) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread.access$2100(ActivityThread.java:117) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:964) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.os.Handler.dispatchMessage(Handler.java:99) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.os.Looper.loop(Looper.java:130) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread.main(ActivityThread.java:3683) 01-30 21:14:17.415: E/AndroidRuntime(680): at java.lang.reflect.Method.invokeNative(Native Method) 01-30 21:14:17.415: E/AndroidRuntime(680): at java.lang.reflect.Method.invoke(Method.java:507) 01-30 21:14:17.415: E/AndroidRuntime(680): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 01-30 21:14:17.415: E/AndroidRuntime(680): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 01-30 21:14:17.415: E/AndroidRuntime(680): at dalvik.system.NativeStart.main(Native Method) 01-30 21:14:17.415: E/AndroidRuntime(680): Caused by: java.lang.NullPointerException 01-30 21:14:17.415: E/AndroidRuntime(680): at android.content.ComponentName.&lt;init&gt;(ComponentName.java:75) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.content.Intent.&lt;init&gt;(Intent.java:2702) 01-30 21:14:17.415: E/AndroidRuntime(680): at com.crosscommunications.adalert.BillingHelper.stopService(BillingHelper.java:261) 01-30 21:14:17.415: E/AndroidRuntime(680): at com.crosscommunications.adalert.inapppurchaseStarter.onDestroy(inapppurchaseStarter.java:129) 01-30 21:14:17.415: E/AndroidRuntime(680): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:2659) 01-30 21:14:17.415: E/AndroidRuntime(680): ... 11 more </code></pre> <p>It's a nullpointerException but I can't figure out what is happening. I use this code to make an in app purchase:</p> <pre><code>package com.crosscommunications.adalert; import java.util.Calendar; import java.util.Date; import java.util.HashMap; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; 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 inapppurchaseStarter extends Activity { private static final String TAG = "BillingService"; private Context mContext; private ImageView purchaseableItem; private Button purchaseButton; SessionManager session; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.i("BillingService", "Starting"); setContentView(R.layout.purchasestarter); mContext = this; Button annuleren = (Button) findViewById(R.id.purchaseAnnuleren); Button starter = (Button) findViewById(R.id.koopStarter); purchaseableItem = (ImageView) findViewById(R.id.gekocht); startService(new Intent(mContext, BillingService.class)); BillingHelper.setCompletedHandler(mTransactionHandler); annuleren.setOnClickListener(new OnClickListener(){ @Override public void onClick(View arg0) { finish(); } }); starter.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { if(BillingHelper.isBillingSupported()){ BillingHelper.requestPurchase(mContext, "android.test.purchased"); // 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 } Log.i(TAG,"default. ID: "+v.getId()); } }); } 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()){ showItem(); if(BillingHelper.latestPurchase.productId.equals("android.test.purchased")){ System.out.println("Starter is vanaf nu aangekocht"); } } }; }; public static Date addMonth(Date date, int i) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.MONTH, i); return cal.getTime(); } private void showItem() { purchaseableItem.setVisibility(View.VISIBLE); Toast toast = Toast.makeText(this, "Product gekocht", Toast.LENGTH_LONG); toast.show(); } @Override protected void onPause() { Log.i(TAG, "onPause())"); super.onPause(); } @Override public void onDestroy() { super.onDestroy(); BillingHelper.stopService(); } } </code></pre> <p>You see that i've got a button, and when clicked on it's gonna finish the activity. every time I finish the activity i get this error....</p> <p>When onDestroy gets called then things go bad.. I think it has something to do with the stopService() method.</p> <p>that method looks like this:</p> <pre><code>public static void stopService(){ mContext.stopService(new Intent(mContext, BillingService.class)); mService = null; mContext = null; mCompletedHandler = null; Log.i(TAG, "Stopping Service"); } </code></pre> <p>Please guys.. Can you give me tips/pointers or just an explanation?</p> <p>EDIT</p> <p>Ok... Done that... I've removed onDestroy and copied the stopService to before the finish method... Getting another nullpointerexception.. Kinda the same:</p> <pre><code>01-30 21:51:07.135: E/AndroidRuntime(741): FATAL EXCEPTION: main 01-30 21:51:07.135: E/AndroidRuntime(741): java.lang.NullPointerException 01-30 21:51:07.135: E/AndroidRuntime(741): at android.content.ComponentName.&lt;init&gt;(ComponentName.java:75) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.content.Intent.&lt;init&gt;(Intent.java:2702) 01-30 21:51:07.135: E/AndroidRuntime(741): at com.crosscommunications.adalert.BillingHelper.stopService(BillingHelper.java:261) 01-30 21:51:07.135: E/AndroidRuntime(741): at com.crosscommunications.adalert.inapppurchaseStarter$2.onClick(inapppurchaseStarter.java:48) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.view.View.performClick(View.java:2485) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.view.View$PerformClick.run(View.java:9080) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.os.Handler.handleCallback(Handler.java:587) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.os.Handler.dispatchMessage(Handler.java:92) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.os.Looper.loop(Looper.java:130) 01-30 21:51:07.135: E/AndroidRuntime(741): at android.app.ActivityThread.main(ActivityThread.java:3683) 01-30 21:51:07.135: E/AndroidRuntime(741): at java.lang.reflect.Method.invokeNative(Native Method) 01-30 21:51:07.135: E/AndroidRuntime(741): at java.lang.reflect.Method.invoke(Method.java:507) 01-30 21:51:07.135: E/AndroidRuntime(741): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 01-30 21:51:07.135: E/AndroidRuntime(741): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 01-30 21:51:07.135: E/AndroidRuntime(741): at dalvik.system.NativeStart.main(Native Method) </code></pre>
 

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