CODEWITHSUNDEEP
androidandroid-toolbar
amanuel2
amanuel2

Reputation: 4646

setSupportActionBar() Makes my app disfunction

For some reason when i put the line setSupportActionBar(MyToolBarVariable)... It goes on to my Genymotion Emulator.. But when it opens the app, it says :

Unfourtuanetly "AppName" has Stoped

But if i delete the setSupportActionBar() Everything works fine... Whats the problem here.. Im going to post MainActivity.java file.. If you need to see others please tell me so below. Thanks for helping!

package com.example.amanuel.zoo4;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
      Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        setContentView(R.layout.activity_main);
    }


}

Here is the LOGCAT When i press the app in my emulator! 

04-06 02:09:02.522 652-1011/? I/ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.example.amanuel.zoo4/.MainActivity (has extras)} from uid 10008 on display 0
04-06 02:09:02.721 3360-3360/? I/art: Late-enabling -Xcheck:jni
04-06 02:09:02.762 652-1021/? I/ActivityManager: Start proc 3360:com.example.amanuel.zoo4/u0a63 for activity com.example.amanuel.zoo4/.MainActivity
04-06 02:09:02.815 652-667/? W/art: Long monitor contention event with owner method=void com.android.server.am.ActivityManagerService.activityPaused(android.os.IBinder) from ActivityManagerService.java:6439 waiters=1 for 136ms
04-06 02:09:02.978 3360-3360/? W/System: ClassLoader referenced unknown path: /data/app/com.example.amanuel.zoo4-2/lib/x86
04-06 02:09:03.170 3360-3360/? D/AndroidRuntime: Shutting down VM
04-06 02:09:03.178 3360-3360/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                 Process: com.example.amanuel.zoo4, PID: 3360
                                                 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.amanuel.zoo4/com.example.amanuel.zoo4.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                                                     at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:148)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                     at java.lang.reflect.Method.invoke(Native Method)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                  Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference
                                                     at android.support.v7.internal.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:94)
                                                     at android.support.v7.internal.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:87)
                                                     at android.support.v7.internal.app.ToolbarActionBar.<init>(ToolbarActionBar.java:77)
                                                     at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:198)
                                                     at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:96)
                                                     at com.example.amanuel.zoo4.MainActivity.onCreate(MainActivity.java:13)
                                                     at android.app.Activity.performCreate(Activity.java:6237)
                                                     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                                                     at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                                                     at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                     at android.os.Looper.loop(Looper.java:148) 
                                                     at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                     at java.lang.reflect.Method.invoke(Native Method) 
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
04-06 02:09:03.193 652-1021/? W/ActivityManager:   Force finishing activity com.example.amanuel.zoo4/.MainActivity
04-06 02:09:03.500 652-1021/? I/WindowManager: Screenshot max retries 4 of Token{75d8954 ActivityRecord{722f0a7 u0 com.example.amanuel.zoo4/.MainActivity t42 f}} appWin=Window{450aeec u0 Starting com.example.amanuel.zoo4} drawState=1
04-06 02:09:03.514 652-652/? W/art: Long monitor contention event with owner method=void com.android.server.am.ActivityManagerService.crashApplication(com.android.server.am.ProcessRecord, android.app.ApplicationErrorReport$CrashInfo) from ActivityManagerService.java:12502 waiters=0 for 299ms
04-06 02:09:03.639 652-666/? W/art: Long monitor contention event with owner method=void com.android.server.am.ActivityManagerService.crashApplication(com.android.server.am.ProcessRecord, android.app.ApplicationErrorReport$CrashInfo) from ActivityManagerService.java:12502 waiters=1 for 216ms
04-06 02:09:03.640 652-652/? W/art: Long monitor contention event with owner method=void com.android.server.am.ActivityManagerService$UiHandler.handleMessage(android.os.Message) from ActivityManagerService.java:1397 waiters=1 for 111ms
04-06 02:09:03.814 652-1641/? I/OpenGLRenderer: Initialized EGL, version 1.4
04-06 02:09:04.021 652-666/? W/ActivityManager: Activity pause timeout for ActivityRecord{722f0a7 u0 com.example.amanuel.zoo4/.MainActivity t42 f}
04-06 02:09:04.129 652-1641/? W/EGL_emulation: eglSurfaceAttrib not implemented
04-06 02:09:04.130 652-1641/? W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xd60610a0, error=EGL_SUCCESS
04-06 02:09:04.198 652-667/? I/Choreographer: Skipped 32 frames!  The application may be doing too much work on its main thread.
04-06 02:09:04.303 652-981/? I/ActivityManager: Killing 1792:com.android.keychain/1000 (adj 15): empty for 3078s
04-06 02:09:04.763 652-668/? E/BluetoothAdapter: Bluetooth binder is null
04-06 02:09:04.825 652-667/? I/Choreographer: Skipped 37 frames!  The application may be doing too much work on its main thread.
04-06 02:09:07.697 3360-3360/? I/Process: Sending signal. PID: 3360 SIG: 9
04-06 02:09:07.732 652-679/? I/ActivityManager: Process com.example.amanuel.zoo4 (pid 3360) has died
04-06 02:09:07.771 652-1641/? E/Surface: getSlotFromBufferLocked: unknown buffer: 0xde8f0df0
04-06 02:09:07.844 652-1641/? D/OpenGLRenderer: endAllStagingAnimators on 0xda3b2380 (RippleDrawable) with handle 0xdc57f670
04-06 02:09:07.852 652-652/? W/art: Long monitor contention event with owner method=void android.view.WindowManagerGlobal.removeView(android.view.View, boolean) from WindowManagerGlobal.java:349 waiters=0 for 102ms
04-06 02:09:07.854 652-1164/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@bc8dc8f attribute=null, token = android.os.BinderProxy@4b639cb
04-06 02:09:08.200 652-671/? W/AppOps: Finishing op nesting under-run: uid 1000 pkg android code 24 time=0 duration=0 nesting=0
04-06 02:09:12.630 308-647/? W/AudioFlinger: write blocked for 9842 msecs, 14 delayed writes, thread 0xf1e00000
04-06 02:09:18.081 100-100/? D/Genyd: Received Set Clipboard
04-06 02:09:18.081 100-100/? D/Genymotion: Received Set Clipboard

Upvotes: 0

Views: 207

Answers (1)

toidiu
toidiu

Reputation: 965

Try putting setContentView(R.layout.activity_main); before trying to instantiate the Toolbar.

Upvotes: 2

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