Databases
StackOverflow2013
Postsdbo
PONullpointerexception when togglebutton is clicked
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONullpointerexception when togglebutton is clicked
    primarykey
    data
    text
    <p>I am trying to get a ToggleButton working but am having a few problems. 1. Its seems to revert back to the default value when it is clicked and I navigate to another screen. 2. I tried transferring its isChecked() value to another activity using SharedPreferences and it now crashes. </p> <pre><code> &lt;ToggleButton android:id="@+id/togBTN" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/homeBtn" android:layout_centerHorizontal="true" android:layout_marginTop="106dp" android:text="Voice Alerts" android:textOff="OFF" android:textOn="ON" /&gt; </code></pre> <p>The above code is in my xml file. The code below is the onClickListener code for it.</p> <pre><code> case R.id.togBTN: SharedPreferences.Editor editor = preferences.edit(); editor.putBoolean("tgpref", tg.isChecked()); // value to store editor.commit(); break; } </code></pre> <p>And this code is where I try to retrieve the value</p> <pre><code>SharedPreferences preferences = getPreferences(MODE_PRIVATE); boolean tgpref = preferences.getBoolean("tgpref", true); //default is true if (tgpref = true) //if (tgpref) may be enough, not sure { speakValue = true; } else { speakValue = false; } </code></pre> <p>This is what I am getting in the <code>Logcat</code>:</p> <pre><code> 02-21 14:49:09.587: W/dalvikvm(483): threadid=1: thread exiting with uncaught exception (group=0x40015560) 02-21 14:49:09.597: E/AndroidRuntime(483): FATAL EXCEPTION: main 02-21 14:49:09.597: E/AndroidRuntime(483): java.lang.NullPointerException 02-21 14:49:09.597: E/AndroidRuntime(483): at ohalleran.stephanie.Traffic.SettingsActivity.onClick(SettingsActivity.java:45) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.view.View.performClick(View.java:2485) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.widget.CompoundButton.performClick(CompoundButton.java:99) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.view.View$PerformClick.run(View.java:9080) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.os.Handler.handleCallback(Handler.java:587) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.os.Handler.dispatchMessage(Handler.java:92) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.os.Looper.loop(Looper.java:130) 02-21 14:49:09.597: E/AndroidRuntime(483): at android.app.ActivityThread.main(ActivityThread.java:3683) 02-21 14:49:09.597: E/AndroidRuntime(483): at java.lang.reflect.Method.invokeNative(Native Method) 02-21 14:49:09.597: E/AndroidRuntime(483): at java.lang.reflect.Method.invoke(Method.java:507) 02-21 14:49:09.597: E/AndroidRuntime(483): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 02-21 14:49:09.597: E/AndroidRuntime(483): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 02-21 14:49:09.597: E/AndroidRuntime(483): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Would really appreciate some help with this.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USLuksprog
    1. USMillyMonster
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COI usually use a OnCheckedChangeListener for toggle buttons: http://developer.android.com/reference/android/widget/CompoundButton.OnCheckedChangeListener.html
      singulars
      1. PONullpointerexception when togglebutton is clicked
      1. USAJcodez
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload