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Android Build a Blog Reader Android App Rebuilding from Scratch Creating the Project and ListActivity

Posted by Wasif Ahmed
Wasif Ahmed
1,798 Points

Unfortunately, Blog Reader has stopped

when i run my app on the emulator, it says "Unfortunately, Blog Reader has stopped. I am using android studio.

Please Help ASAP!

Harry James
Harry James
14,780 Points
Harry James
Harry James
14,780 Points

Hey Wasif!

Can you please provide the Logcat of the crash here and I'll take a look? :)

Wasif Ahmed
Wasif Ahmed
1,798 Points

01-26 20:09:21.079 1456-1456/com.example.wasifahmed.blogreader E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.wasifahmed.blogreader, PID: 1456 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.wasifahmed.blogreader/com.example.wasifahmed.blogreader.MainListActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' at android.app.ListActivity.onContentChanged(ListActivity.java:243) at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:293) at android.app.Activity.setContentView(Activity.java:1929) at com.example.wasifahmed.blogreader.MainListActivity.onCreate(MainListActivity.java:15) at android.app.Activity.performCreate(Activity.java:5231) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)             at android.app.ActivityThread.access$800(ActivityThread.java:135)             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)             at android.os.Handler.dispatchMessage(Handler.java:102)             at android.os.Looper.loop(Looper.java:136)             at android.app.ActivityThread.main(ActivityThread.java:5001)             at java.lang.reflect.Method.invokeNative(Native Method)             at java.lang.reflect.Method.invoke(Method.java:515)             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)             at dalvik.system.NativeStart.main(Native Method)

Its Pretty Long !

Wasif Ahmed
Wasif Ahmed
1,798 Points

I Think This Is The Actual Problem!

java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'

Wasif Ahmed
Wasif Ahmed
1,798 Points

Well I Fixed The App Not Running But Now I've Got Another Problem!

It doesn't load the list view. all it loads is the action bar at the top

Please Help!

Harry James
Harry James
14,780 Points
Harry James
Harry James
14,780 Points

Hmm...

Are you getting any errors? If so, provide a new Logcat. If not, post your code onto here and I'll take a look.

Wasif Ahmed
Wasif Ahmed
1,798 Points

01-27 19:55:57.775 1353-1353/com.example.wasifahmed.blogreader E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from GradienCache

01-27 19:55:57.779 1353-1353/com.example.wasifahmed.blogreader E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384

01-27 19:55:57.831 1353-1353/com.example.wasifahmed.blogreader E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from Caches::initConstraints()

01-27 19:55:57.835 1353-1353/com.example.wasifahmed.blogreader E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384

Wasif Ahmed
Wasif Ahmed
1,798 Points

The ListView Id is "@android:id/list" but it still doesn't work

4 Answers

Harry James
Harry James
14,780 Points
Harry James
Harry James
14,780 Points

It sounds as though this is an issue with your emulator rather than your app.

Please follow the instructions below for the corresponding emulator:

Default Emulator

Go to AVD Manager >> Click the Pencil icon/Edit icon beside the device you are using >> Click Show Advanced Settings >> Make sure Use Host GPU is checked.

If you have made sure that you have Use Host GPU checked, from the same screen, increase the RAM amount (You are getting this error because your emulator is running out of video memory):

Genymotion Emulator

Open Genymotion >> Click on the Settings icon beside the device you are using >> Increase the RAM amount (You are getting this error because your emulator is running out of video memory):

If this does not fix the issue, open Oracle VM VirtualBox >> Click Settings with the device you are using selected >> Go to System and increase the Base Memory.

If again, it is still not fixed, from the same screen, go to Display and increase the Video Memory:

Hope it helps and if you have any more issues, give me a shout :)

elfproductivity
elfproductivity
10,489 Points
elfproductivity
elfproductivity
10,489 Points

In the xml layout file for your MainActivity, is your ListView id set to "@android:id/list" ? If not, try setting it to that.

Wasif Ahmed
Wasif Ahmed
1,798 Points
Wasif Ahmed
Wasif Ahmed
1,798 Points

Im pretty sure its a problem with my code because when I run it on a real device it still doesn't show the list view

Wasif Ahmed
Wasif Ahmed
1,798 Points

Im pretty sure its a problem with my code because when I run it on a real device it still doesn't show the list view

Harry James
Harry James
14,780 Points
Harry James
Harry James
14,780 Points

Have you tried both a real device and an emulator?

If so, paste your code here and I'll take a look and see if anything stands out.

Wasif Ahmed
Wasif Ahmed
1,798 Points
Wasif Ahmed
Wasif Ahmed
1,798 Points

it is still not working