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POApp crashes whenn setting an onClickListener?
 

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    <p>Hi everybody I'm struggling a strange problem. I changed my ViewFlipper to ViewPager and since there my App crashed. I found out that it's not the Viewpager that crashes but the button.setOnClickListener method. I commented out everything else so I noticed that the App works fine if I'm commenting out my two Buttons with that method. And it's not the thing inside onClick(), I treied it out and it crashes even if it's empty.but here is some code of the one im fighting with:</p> <pre><code> public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MyPagerAdapter adapter = new MyPagerAdapter(); ViewPager myPager = (ViewPager)findViewById(R.id.pager); myPager.setAdapter(adapter); myPager.setCurrentItem(1); new Toolbox(); push = (Button)findViewById(R.id.pushbutton); push.setOnClickListener(new OnClickListener() { public void onClick(View v) { head=head_field.getText().toString(); note=note_field.getText().toString(); try { Toolbox.createTask(userToken,task, Dashboard_id, head, note, service); head_field.setText(""); note_field.setText(""); } catch (ProducteevException e) { return; } } }); </code></pre> <p>this is the button xml excerpt:</p> <pre><code>&lt;Button android:id="@+id/pushbutton" android:layout_width="200dp" android:layout_height="200dp" android:layout_gravity="center_horizontal" android:layout_marginTop="35dp" android:background="@drawable/push_button" /&gt; </code></pre> <p>and here the LogCat</p> <pre><code>01-12 20:50:24.402: W/dalvikvm(28405): threadid=1: thread exiting with uncaught exception (group=0x40015578) 01-12 20:50:24.402: E/AndroidRuntime(28405): FATAL EXCEPTION: main 01-12 20:50:24.402: E/AndroidRuntime(28405): java.lang.RuntimeException: Unable to start activity ComponentInfo{producteev.push/producteev.push.Producteev_pushActivity}: java.lang.NullPointerException 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.os.Handler.dispatchMessage(Handler.java:99) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.os.Looper.loop(Looper.java:123) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread.main(ActivityThread.java:3687) 01-12 20:50:24.402: E/AndroidRuntime(28405): at java.lang.reflect.Method.invokeNative(Native Method) 01-12 20:50:24.402: E/AndroidRuntime(28405): at java.lang.reflect.Method.invoke(Method.java:507) 01-12 20:50:24.402: E/AndroidRuntime(28405): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 01-12 20:50:24.402: E/AndroidRuntime(28405): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 01-12 20:50:24.402: E/AndroidRuntime(28405): at dalvik.system.NativeStart.main(Native Method) 01-12 20:50:24.402: E/AndroidRuntime(28405): Caused by: java.lang.NullPointerException 01-12 20:50:24.402: E/AndroidRuntime(28405): at producteev.push.Producteev_pushActivity.onCreate(Producteev_pushActivity.java:122) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 01-12 20:50:24.402: E/AndroidRuntime(28405): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 01-12 20:50:24.402: E/AndroidRuntime(28405): ... 11 more </code></pre> <p>Would be amazing if somebody knows that Problem.</p>
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    1. COsee this line 01-12 20:50:24.402: E/AndroidRuntime(28405): at producteev.push.Producteev_pushActivity.onCreate(Producteev_pushActivity.java:122) this is your best friend, learn to look for you package name to find the cause of the crash
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      1. POApp crashes whenn setting an onClickListener?
      1. USShereef Marzouk
 

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