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POSharedPreferences returns a null even though it haves a default value
 

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  1. POSharedPreferences returns a null even though it haves a default value
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    <p>I have my main activity which saves and load some data from the SharedPreferences... I've been able to do this until now.</p> <p>These are my onCreate, onPause and OnResume methods.</p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setTitle(R.string.title_activity_main); this.spinner = (Spinner) findViewById(R.id.geomObject); this.sbWidth = (SeekBar) findViewById(R.id.widthSB); this.sbDepth = (SeekBar) findViewById(R.id.depthSB); this.sbHeight = (SeekBar) findViewById(R.id.heightSB); this.widthProgress = (TextView) findViewById(R.id.widthDisplay); this.depthProgress = (TextView) findViewById(R.id.depthDisplay); this.heightProgress = (TextView) findViewById(R.id.heightDisplay); ...more code... } protected void onResume() { super.onResume(); loadPrefs(); } protected void onPause() { super.onPause(); savePrefs(); } </code></pre> <p>And these are the method I do most of the work, so I can keep the onX methods clean:</p> <pre><code>private void savePrefs() { this.width = this.sbWidth.getProgress(); this.depth = this.sbDepth.getProgress(); this.height = this.sbHeight.getProgress(); this.forma = this.spinner.getSelectedItemPosition(); getSharedPreferences("SEEKBARS", MODE_PRIVATE).edit().putInt("width", width).commit(); getSharedPreferences("SEEKBARS", MODE_PRIVATE).edit().putInt("depth", depth).commit(); getSharedPreferences("SEEKBARS", MODE_PRIVATE).edit().putInt("height", height).commit(); getSharedPreferences("SEEKBARS", MODE_PRIVATE).edit().putInt("forma", forma).commit(); getSharedPreferences("LOCKBARS", MODE_PRIVATE).edit().putBoolean("lockbars", menuLock.isChecked()).commit(); } private void loadPrefs() { int savedSpinner = getSharedPreferences("SEEKBARS", MODE_PRIVATE).getInt("forma", SPINNER_DEFAULT); int savedWidth = getSharedPreferences("SEEKBARS", MODE_PRIVATE).getInt("width", SEEKBAR_DEFAULT); int savedDepth = getSharedPreferences("SEEKBARS", MODE_PRIVATE).getInt("depth", SEEKBAR_DEFAULT); int savedHeight = getSharedPreferences("SEEKBARS", MODE_PRIVATE).getInt("height", SEEKBAR_DEFAULT); boolean savedLockFlag = getSharedPreferences("LOCKBARS", MODE_PRIVATE).getBoolean("lockbars", false); this.spinner.setSelection(savedSpinner); this.sbWidth.setProgress(savedWidth); this.sbDepth.setProgress(savedDepth); this.sbHeight.setProgress(savedHeight); //This is the line raising the exception Display: this.menuLock.setChecked(savedLockFlag); this.widthProgress.setText(String.valueOf(savedWidth) + " " + getResources().getString(R.string.blocks)); this.depthProgress.setText(String.valueOf(savedDepth) + " " + getResources().getString(R.string.blocks)); this.heightProgress.setText(String.valueOf(savedHeight) + " " + getResources().getString(R.string.blocks)); } </code></pre> <p>I don't see where is the error. I've been searching and I know that I can't call getSharedPreferences on onCreate, that's why I do it on onResume. What's wrong?</p> <p>I also attach the logcat, just in case:</p> <pre><code>FATAL EXCEPTION: main java.lang.RuntimeException: Unable to resume activity {es.nirvash.android.msg/es.nirvash.android.msg.MainActivity}: java.lang.NullPointerException at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2567) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2595) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2109) at android.app.ActivityThread.access$600(ActivityThread.java:132) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1157) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4575) 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:789) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at es.nirvash.android.msg.MainActivity.loadPrefs(MainActivity.java:231) at es.nirvash.android.msg.MainActivity.onResume(MainActivity.java:147) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1154) at android.app.Activity.performResume(Activity.java:4539) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2557) ... 12 more </code></pre>
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    1. This table or related slice is empty.
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      1. POSharedPreferences returns a null even though it haves a default value
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    1. CO"I don't see where is the error. I've been searching and I know that I can't call getSharedPreferences on onCreate, that's why I do it on onResume" Where did you hear this? That's wrong.
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    2. COHere: http://stackoverflow.com/a/5991458/1569084 "getSharedPreferences() can only be called AFTER onCreate() has been called on an Activity."
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    3. COuse the debugger. to see what exactly is null.
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