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POUnable to setContentView with my tabhost with nested activities
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  1. POUnable to setContentView with my tabhost with nested activities
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    copied!<p>My code below is based on this: <a href="http://web.archive.org/web/20100816175634/http://blog.henriklarsentoft.com/2010/07/android-tabactivity-nested-activities/" rel="nofollow">http://web.archive.org/web/20100816175634/http://blog.henriklarsentoft.com/2010/07/android-tabactivity-nested-activities/</a> </p> <p>My issue is with the history ArrayList that is supposed to store the activities so I can properly utilize the back button, however my app crashes when I hit back. I think it's because history isn't exactly storing Views. </p> <p>I added:</p> <pre><code> View view = getLocalActivityManager().startActivity("ViewPagerActivity", new Intent(this,ViewPagerActivity.class) .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)) .getDecorView(); </code></pre> <p>to my back method to see if it would load it and it works.</p> <pre><code>public class FeaturedTabGroup extends ActivityGroup { // Keep this in a static variable to make it accessible for all the nesten activities, lets them manipulate the view public static FeaturedTabGroup group; // Need to keep track of the history if you want the back-button to work properly, don't use this if your activities requires a lot of memory. private ArrayList history; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.history = new ArrayList(); group = this; // Start the root activity withing the group and get its view View view = getLocalActivityManager().startActivity("ViewPagerActivity", new Intent(this,ViewPagerActivity.class) .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)) .getDecorView(); // Replace the view of this ActivityGroup replaceView(view); } public void replaceView(View v) { // Adds the old one to history history.add(v); // Changes this Groups View to the new View. setContentView(v); System.out.println("view set successful"); } public void back() { if(history.size() &gt; 0) { history.remove(history.size()-1); setContentView((Integer) history.get(history.size()-1)); }else { finish(); } } @Override public void onBackPressed() { FeaturedTabGroup.group.back(); return; } } </code></pre> <p>EDIT:</p> <p>For brevity, I'll approach this problem with another question: why does setContentView(v) work, but not when the Views are store in an ArrayList? What happens to the view when it is stored in an arraylist?</p>
 

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