Question

My app offers a “share/tell-a-friend” function. When the “share” button is pressed the following method is being called to open a list of apps, which can perform the action (Eg. Gmail, Twittroid, Facebook…):

public void share() {
    Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
    shareIntent.setType("text/plain");
    shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, getText(R.string.menu_share_subject));
    shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, getText(R.string.menu_share_body));

    startActivity(Intent.createChooser(shareIntent, getText(R.string.menu_share_intent)));      
}

The sharing functionality works basically. But when the sharing app (Facebook, Twitter, …) tries to return to my app, a force close is thrown.

I guess that my app gets closed in the background during the sharing process. At least that is what the debugger says.

Any ideas?

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The problem seems to be that the app closes in the background. Also when I open the browser from my app an try to return to my app with the back key. A force close is thrown. This is the Log Cat output

04-13 22:28:42.003: ERROR/AndroidRuntime(18915): Uncaught handler: thread main exiting due to uncaught exception 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.xxx.xxx/eu.xxx.xxx.xxx}: java.lang.NullPointerException 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2401) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread.access$2100(ActivityThread.java:116) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.os.Handler.dispatchMessage(Handler.java:99) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.os.Looper.loop(Looper.java:123) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread.main(ActivityThread.java:4203) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at java.lang.reflect.Method.invokeNative(Native Method) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at java.lang.reflect.Method.invoke(Method.java:521) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at dalvik.system.NativeStart.main(Native Method) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): Caused by: java.lang.NullPointerException 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at eu.xxx.xxx.xxx.fillData(xxx.java:178) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at eu.xxx.xxx.xxx.access$1(xxx.java:173) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at eu.xxx.xxx.xxx$1.onTextChanged(xxx.java:139) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.TextView.sendOnTextChanged(TextView.java:6096) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.TextView.setText(TextView.java:2677) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.TextView.setText(TextView.java:2542) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.EditText.setText(EditText.java:71) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.TextView.setText(TextView.java:2517) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.widget.TextView.onRestoreInstanceState(TextView.java:2417) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.view.View.dispatchRestoreInstanceState(View.java:5689) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1125) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1125) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1125) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.view.View.restoreHierarchyState(View.java:5668) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1506) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.Activity.onRestoreInstanceState(Activity.java:833) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ListActivity.onRestoreInstanceState(ListActivity.java:221) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.Activity.performRestoreInstanceState(Activity.java:805) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1172) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2378) 04-13 22:28:42.253: ERROR/AndroidRuntime(18915): ... 11 more

Answer 1

04-13 22:28:42.253: ERROR/AndroidRuntime(18915): Caused by: java.lang.NullPointerException
04-13 22:28:42.253: ERROR/AndroidRuntime(18915): at xx.xxx.xxx.xxx.fillData(xxx.java:178)

You have a NullPointerException. Fix that, and with luck, your problems will go away.