Intent to recall activity error

Question

I made a layout xml for the settings of my app. I had a preference and I would like clicking on this will be sent to another activity. In the file of settings.java I put the following code to invoke the other activity but I get an error. This is the code:

Preference info;

info.setOnPreferenceClickListener(new OnPreferenceClickListener()) {
    public boolean onPreferenceClick(Preference preference) {
    intent = new Intent(getBaseContext(), OtherActivity.class);
    startActivity(intent);

    }
}

How can i fix? Thanks

This is the error:

07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): 07-03 14:43:46.314: E/AndroidRuntime(9691): FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{com.XXX}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) at android.app.ActivityThread.access$600(ActivityThread.java:141) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5039) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at com.XXX.onCreate(Impostazioni.java:56) at android.app.Activity.performCreate(Activity.java:5104) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) ... 11 more

I do not know because I can not run the project .. He says it contains errors — John Smoother, Jul 03 '13 at 08:33
If you cannot build your project the console will often tell you which line contains the error and what might be the problem, post this in your question. — Timmetje, Jul 03 '13 at 08:41

mmoghrabi · Answer 1 · 2013-07-03T10:06:04.350

1

you problem is here getBaseContext() replace it with :

     intent = new Intent(YourMainActivity.this, YourTargetedActivity.class);


     info.setOnPreferenceClickListener(new OnPreferenceClickListener() { 
     public boolean onPreferenceClick(Preference preference) 
     { 
     intent = new Intent(Impostazioni.this, Informazioni.class));
     startActivity(intent);
     return true;
     } 
     });

edited Jul 03 '13 at 10:06

answered Jul 03 '13 at 08:36

mmoghrabi

1,233
1
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23

well, but now I get the error at the first line // Error informazioni.setOnPreferenceClickListener(new OnPreferenceClickListener()) { // Error public boolean onPreferenceClick(Preference preference) { intent = new Intent(Impostazioni.this, Informazioni.class); startActivity(intent); } } – John Smoother Jul 03 '13 at 08:43

Intent to recall activity error

1 Answers1