Android launcher crashes when I click the app drawer button

Question

Hello I am working on a android launcher everything worked on my faea f2 but when i tried to run it on my faea f1 and my moto atrix 4g when I click the app drawer button the launcher crashes LogCat shows this error:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.d4a.tobiasuil2/com.guillaumecendre.android.launcher.Main}: java.lang.NullPointerException

Heres the full logicat log:

    01-01 18:18:30.778: E/PhonePolicy(4746): Could not preload class for phone policy: com.android.internal.policy.impl.PhoneWindow$ContextMenuCallback
01-01 18:18:37.237: E/Click event(4746): Home button tapped
01-01 18:18:37.837: E/AndroidRuntime(4746): FATAL EXCEPTION: main
01-01 18:18:37.837: E/AndroidRuntime(4746): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.d4a.tobiasuil2/com.guillaumecendre.android.launcher.Main}: java.lang.NullPointerException
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2077)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2102)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread.access$600(ActivityThread.java:133)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1198)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.os.Looper.loop(Looper.java:137)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread.main(ActivityThread.java:4765)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at java.lang.reflect.Method.invokeNative(Native Method)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at java.lang.reflect.Method.invoke(Method.java:511)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at dalvik.system.NativeStart.main(Native Method)
01-01 18:18:37.837: E/AndroidRuntime(4746): Caused by: java.lang.NullPointerException
01-01 18:18:37.837: E/AndroidRuntime(4746):     at com.guillaumecendre.android.launcher.Main.doLayout(Main.java:1207)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at com.guillaumecendre.android.launcher.Main.onCreate(Main.java:261)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.Activity.performCreate(Activity.java:5024)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
01-01 18:18:37.837: E/AndroidRuntime(4746):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2041)
01-01 18:18:37.837: E/AndroidRuntime(4746):     ... 11 more

Main.java //code is to big to post so heres a link to it via Drive:

https://docs.google.com/document/d/15xlQ3nZ0b1pBq82xopcq-htEWAmrRnqQDY5uX8gabqM/edit?usp=sharing

Any help would be amazing

Thanks way in advance!

D3vs4apps

http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it — Karakuri, Jun 18 '14 at 15:37
the code is to long to post heres a link to main.java: https://docs.google.com/document/d/15xlQ3nZ0b1pBq82xopcq-htEWAmrRnqQDY5uX8gabqM/edit?usp=sharing — D3vs4apps, Jun 18 '14 at 15:45
Code is to big to fit in post added link for main.java via google drive to discerption Thanks in advance — D3vs4apps, Jun 18 '14 at 15:49

score 0 · Answer 1 · answered Jun 18 '14 at 15:51

0

In your code you are doing this:

View v = null;

cva = new CustomViewAdapter(this, 0, apps, Settings.font, Settings.font_color, Settings.font_size, Settings.icon_size, Settings.list_style, mode);

orientation = getResources().getConfiguration().orientation;
if (Settings.list_style == LIST_STYLE) {

    lv = (ListView) v;
    lv.setAdapter(cva);

You are setting v to be null, and then casting it to ListView (Does nothing), and then you are trying to access setAdapter method of a null variable, hence, there you have your NullPointerException on line 1207, which is lv.setAdapter(cva);

answered Jun 18 '14 at 15:51

Alejandro Alcalde

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so what do i need to do to fix it – D3vs4apps Jun 18 '14 at 15:55
Your code is huge. You should retrieve the listview you want to use via findviewbyid or inflate it. – Alejandro Alcalde Jun 18 '14 at 16:04
The ListView you want to use there is the same that `private ListView lv;`? – Alejandro Alcalde Jun 18 '14 at 16:16
Try removing the line `lv = (ListView) v;` and just use your ListView `lv` – Alejandro Alcalde Jun 18 '14 at 16:17
The ListView you want to use is declared in xml? – Alejandro Alcalde Jun 18 '14 at 16:48

Android launcher crashes when I click the app drawer button

1 Answers1