Clicking back button causes force close / NullPointerException

StackOverflow https://stackoverflow.com/questions/23282567

Question

I'm experiencing a NullPointerException and ForceClose issue when clicking the back button after launching either the gallery or the default audio player using the android application I've built.

I've seen a few examples that state I'll need to finish the activity or check for a back button press - but I'm not sure how exactly that would fit into this scenario.

It's crashing on line 84 which is: Uri selectedImage = data.getData();

Source:

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    // if (resultCode == Activity.RESULT_OK) {
    if (requestCode == SELECT_VIDEO) {
        {
            Uri selectedVideo = data.getData();
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(selectedVideo, "video/*");
            startActivity(intent);

        }
    } else if (requestCode == SELECT_PHOTO) {

        Uri selectedImage = data.getData();
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(selectedImage, "image/*");
        startActivity(intent);
    }

LogCat:

04-24 21:04:26.441: D/AndroidRuntime(4491): Shutting down VM
04-24 21:04:26.441: W/dalvikvm(4491): threadid=1: thread exiting with uncaught exception (group=0x41df5930)
04-24 21:04:26.451: E/AndroidRuntime(4491): FATAL EXCEPTION: main
04-24 21:04:26.451: E/AndroidRuntime(4491): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=0, data=null} to activity {com.tablet.hairmax/com.tablet.hairmax.UI}: java.lang.NullPointerException
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:3362)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread.access$1100(ActivityThread.java:141)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1282)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.os.Looper.loop(Looper.java:137)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at java.lang.reflect.Method.invokeNative(Native Method)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at java.lang.reflect.Method.invoke(Method.java:511)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at dalvik.system.NativeStart.main(Native Method)
04-24 21:04:26.451: E/AndroidRuntime(4491): Caused by: java.lang.NullPointerException
04-24 21:04:26.451: E/AndroidRuntime(4491):     at com.tablet.hairmax.UI.onActivityResult(UI.java:84)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.Activity.dispatchActivityResult(Activity.java:5293)
04-24 21:04:26.451: E/AndroidRuntime(4491):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
04-24 21:04:26.451: E/AndroidRuntime(4491):     ... 11 more
04-24 21:04:28.721: I/Process(4491): Sending signal. PID: 4491 SIG: 9
04-24 21:04:39.681: D/AndroidRuntime(4543): Shutting down VM
04-24 21:04:39.681: W/dalvikvm(4543): threadid=1: thread exiting with uncaught exception (group=0x41df5930)
04-24 21:04:39.691: E/AndroidRuntime(4543): FATAL EXCEPTION: main
04-24 21:04:39.691: E/AndroidRuntime(4543): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=0, data=null} to activity {com.tablet.hairmax/com.tablet.hairmax.UI}: java.lang.NullPointerException
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:3362)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread.access$1100(ActivityThread.java:141)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1282)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.os.Looper.loop(Looper.java:137)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at java.lang.reflect.Method.invokeNative(Native Method)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at java.lang.reflect.Method.invoke(Method.java:511)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at dalvik.system.NativeStart.main(Native Method)
04-24 21:04:39.691: E/AndroidRuntime(4543): Caused by: java.lang.NullPointerException
04-24 21:04:39.691: E/AndroidRuntime(4543):     at com.tablet.hairmax.UI.onActivityResult(UI.java:76)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.Activity.dispatchActivityResult(Activity.java:5293)
04-24 21:04:39.691: E/AndroidRuntime(4543):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
04-24 21:04:39.691: E/AndroidRuntime(4543):     ... 11 more
04-24 21:05:14.191: D/AndroidRuntime(4586): Shutting down VM
04-24 21:05:14.191: W/dalvikvm(4586): threadid=1: thread exiting with uncaught exception (group=0x41df5930)
04-24 21:05:14.191: E/AndroidRuntime(4586): FATAL EXCEPTION: main
04-24 21:05:14.191: E/AndroidRuntime(4586): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=0, data=null} to activity {com.tablet.hairmax/com.tablet.hairmax.UI}: java.lang.NullPointerException
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:3362)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread.access$1100(ActivityThread.java:141)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1282)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.os.Looper.loop(Looper.java:137)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at java.lang.reflect.Method.invokeNative(Native Method)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at java.lang.reflect.Method.invoke(Method.java:511)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at dalvik.system.NativeStart.main(Native Method)
04-24 21:05:14.191: E/AndroidRuntime(4586): Caused by: java.lang.NullPointerException
04-24 21:05:14.191: E/AndroidRuntime(4586):     at com.tablet.hairmax.UI.onActivityResult(UI.java:84)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.Activity.dispatchActivityResult(Activity.java:5293)
04-24 21:05:14.191: E/AndroidRuntime(4586):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
04-24 21:05:14.191: E/AndroidRuntime(4586):     ... 11 more
Was it helpful?

Solution

data is null. You need to check before that line if data is null. Since you are pressing the Back button, you aren't sending an Intent back with setResult() like would normally be done.

public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if (resultCode == Activity.RESULT_OK) {
if (data != null)
{
    if (requestCode == SELECT_VIDEO) {
        Uri selectedVideo = data.getData();
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(selectedVideo, "video/*");
        startActivity(intent);
    } else if (requestCode == SELECT_PHOTO) {

        Uri selectedImage = data.getData();
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(selectedImage, "image/*");
        startActivity(intent);
    }
}

See this answer about getting an image from gallery

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