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POandroid intent giving nullpointer exception
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  1. POandroid intent giving nullpointer exception
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    copied!<pre><code>package com.org.myOxygen.activities; import java.util.Stack; import android.app.Activity; import android.app.ActivityGroup; import android.app.LocalActivityManager; import android.content.Intent; import android.os.Bundle; import android.view.Window; public class ApplicationTabActivityGroup extends ActivityGroup{ private static Stack&lt;String&gt; stack; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (stack == null) stack = new Stack&lt;String&gt;(); //start default activity push("Search Activity", new Intent(this, ApplicaitonActivity.class)); } @Override public void finishFromChild(Activity child) { pop(); } @Override public void onBackPressed() { pop(); } public void push(String id, Intent intent) { Window window = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)); if (window != null) { stack.push(id); setContentView(window.getDecorView()); } } public void pop() { if (stack.size() == 1) finish(); LocalActivityManager manager = getLocalActivityManager(); manager.destroyActivity(stack.pop(), true); if (stack.size() &gt; 0) { Intent lastIntent = manager.getActivity(stack.peek()).getIntent(); Window newWindow = manager.startActivity(stack.peek(), lastIntent); setContentView(newWindow.getDecorView()); } } </code></pre> <p>}</p> <p>I am getting error on line </p> <pre><code>Intent lastIntent = manager.getActivity(stack.peek()).getIntent(); </code></pre> <p>The error is <code>NullPointerException</code>.</p> <p>What might be wrong there?</p> <h1>edit - 1</h1> <pre><code> 11-26 14:58:57.256: E/AndroidRuntime(557): FATAL EXCEPTION: main 11-26 14:58:57.256: E/AndroidRuntime(557): java.lang.NullPointerException 11-26 14:58:57.256: E/AndroidRuntime(557): at com.org.myOxygen.activities.SearchTabActivityGroup.pop(SearchTabActivityGroup.java:59) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.org.myOxygen.activities.SearchTabActivityGroup.onBackPressed(SearchTabActivityGroup.java:36) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.app.Activity.onKeyUp(Activity.java:1888) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.KeyEvent.dispatch(KeyEvent.java:1061) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.app.Activity.dispatchKeyEvent(Activity.java:2068) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1643) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:788) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:788) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:788) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.widget.TabHost.dispatchKeyEvent(TabHost.java:275) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:788) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:788) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1667) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1102) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.app.Activity.dispatchKeyEvent(Activity.java:2063) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1643) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2471) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2441) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.view.ViewRoot.handleMessage(ViewRoot.java:1735) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.os.Handler.dispatchMessage(Handler.java:99) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.os.Looper.loop(Looper.java:123) 11-26 14:58:57.256: E/AndroidRuntime(557): at android.app.ActivityThread.main(ActivityThread.java:4627) 11-26 14:58:57.256: E/AndroidRuntime(557): at java.lang.reflect.Method.invokeNative(Native Method) 11-26 14:58:57.256: E/AndroidRuntime(557): at java.lang.reflect.Method.invoke(Method.java:521) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 11-26 14:58:57.256: E/AndroidRuntime(557): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 11-26 14:58:57.256: E/AndroidRuntime(557): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Here is the stack trace!</p>
 

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