我正在尝试在我的应用程序中设置应用程序内结算。我没有走得太远，并且在尝试启动IabHelper时遇到了空指针异常。我正在关注this google tutorial。
import com.iabtest.util.IabHelper;
import com.iabtest.util.IabResult;
public class MainActivity extends Activity
{
IabHelper mHelper;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String base64EncodedPublicKey = "My_secret_key";
mHelper = new IabHelper(this, base64EncodedPublicKey);
mHelper.enableDebugLogging(true); //Turned on to try to help solve the issue
Log.d("TEST", "Starting setup.");
mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener()
{
public void onIabSetupFinished(IabResult result)
{
Log.d("TEST", "Setup finished.");
if(!result.isSuccess())
{
// Oh noes, there was a problem.
Log.d("TEST", "Problem setting up in-app billing: " + result);
return;
}
//IAB SET UP!
Log.d("TEST", "IAB ready");
}
});
}
}
在下面的logcat中，似乎在第267行的IabHelper.java中触发了空指针异常。由于这是谷歌代码，我不知道如何解决这个问题。这是第267行。
if (!mContext.getPackageManager().queryIntentServices(serviceIntent, 0).isEmpty()) {
这是我的LogCat，错误：
12-17 05:28:29.908: E/Trace(1478): error opening trace file: No such file or directory (2)
12-17 05:28:30.898: W/GooglePlayServicesUtil(1478): Google Play Store is missing.
12-17 05:28:31.838: D/TEST(1478): Starting setup.
12-17 05:28:31.838: D/IabHelper(1478): Starting in-app billing setup.
12-17 05:28:31.848: D/AndroidRuntime(1478): Shutting down VM
12-17 05:28:31.848: W/dalvikvm(1478): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
12-17 05:28:31.878: E/AndroidRuntime(1478): FATAL EXCEPTION: main
12-17 05:28:31.878: E/AndroidRuntime(1478): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.iabtest/com.iabtest.MainActivity}: java.lang.NullPointerException
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.os.Handler.dispatchMessage(Handler.java:99)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.os.Looper.loop(Looper.java:137)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread.main(ActivityThread.java:5041)
12-17 05:28:31.878: E/AndroidRuntime(1478): at java.lang.reflect.Method.invokeNative(Native Method)
12-17 05:28:31.878: E/AndroidRuntime(1478): at java.lang.reflect.Method.invoke(Method.java:511)
12-17 05:28:31.878: E/AndroidRuntime(1478): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-17 05:28:31.878: E/AndroidRuntime(1478): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-17 05:28:31.878: E/AndroidRuntime(1478): at dalvik.system.NativeStart.main(Native Method)
12-17 05:28:31.878: E/AndroidRuntime(1478): Caused by: java.lang.NullPointerException
12-17 05:28:31.878: E/AndroidRuntime(1478): at com.iabtest.util.IabHelper.startSetup(IabHelper.java:267)
12-17 05:28:31.878: E/AndroidRuntime(1478): at com.iabtest.MainActivity.onCreate(MainActivity.java:112)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.Activity.performCreate(Activity.java:5104)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-17 05:28:31.878: E/AndroidRuntime(1478): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-17 05:28:31.878: E/AndroidRuntime(1478): ... 11 more
编辑：我仍然不确定错误的原因。但是，我找到了一个比google文档更好的有用教程。 http://www.techotopia.com/index.php/Integrating_Google_Play_In-app_Billing_into_an_Android_Application_%E2%80%93_A_Tutorial
答案 0 :(得分：67)
Googles的另一个很好的例子是写一次，让其他人解决我们的问题＆＃39;。即使在这个时刻（2014年6月），补丁也是如此。还没有发布的sdk。要解决问题，请更换
if (!mContext.getPackageManager().queryIntentServices(serviceIntent, 0).isEmpty()) {
带
PackageManager pm=mContext.getPackageManager();
List<ResolveInfo> intentServices = pm.queryIntentServices(serviceIntent, 0);
if (intentServices != null && !intentServices.isEmpty())
然后在配置代码中
替换
if (mContext != null) mContext.unbindService(mServiceConn);
带
if (mContext != null && mService!=null) mContext.unbindService(mServiceConn);
我希望这会有所帮助。
答案 1 :(得分：0)
请添加谷歌播放服务的jar文件。这是错误注册缺少谷歌播放服务
答案 2 :(得分：0)
这个问题可能与提出的问题here
有关更新的代码尚未推送到SDK Manager，但您可以在此处查看与此问题相关的所有更改：
https://code.google.com/p/marketbilling/source/detail?r=7ec85a9b619fc5f85023bc8125e7e6b1ab4dd69f
此问题影响了4个文件。进行他们建议的更改，看看是否仍然遇到同样的问题。
答案 3 :(得分：0)
实际上，它在这里返回null。
Intent serviceIntent = getExplicitIapIntent();
对待这种情况：
Intent serviceIntent = getExplicitIapIntent();
if(serviceIntent != null) {
if (!mContext.getPackageManager().queryIntentServices(serviceIntent, 0).isEmpty()) {
// service available to handle that Intent
mContext.bindService(serviceIntent, mServiceConn, Context.BIND_AUTO_CREATE);
}
}