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POHow to restore state of an Android View (UI)?
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  1. POHow to restore state of an Android View (UI)?
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    copied!<p>I'm trying to save state of my view in one activity and pass it to another activity using a Bundle. In the second activity I try to restore the view state using the bundle. </p> <p>First Activity</p> <pre><code>private View CreateView() { ScrollView scrollView = new ScrollView(this); final LinearLayout layout = new LinearLayout(this); layout.setOrientation(android.widget.LinearLayout.VERTICAL); scrollView.addView(layout); Button btn = new Button(this); btn.setId(100); btn.setText("Button Text"); btn.setOnClickListener(new ClickListener()); layout.addView(btn); return scrollView; } </code></pre> <p>onCreate</p> <pre><code>super.onCreate(savedInstanceState); View v = CreateView(); setContentView(v); </code></pre> <p>Saving state</p> <pre><code>SparseArray&lt;Parcelable&gt; array = new SparseArray&lt;Parcelable&gt;(); view.saveHierarchyState(array); Bundle bundle = new Bundle(); bundle.putSparseParcelableArray("state", array); Intent intent = new Intent(context, SecondActivity.class); intent.putExtras(bundle); startActivity(intent); </code></pre> <p>Second Activity onCreate</p> <pre><code>bundle = this.getIntent().getExtras(); View view = new View(this); view.restoreHierarchyState(bundle.getSparseParcelableArray("state")); setContentView(view.getRootView()); Button btn = (Button)findViewById(100); </code></pre> <p>Everything works without an exception. However, I face two issues: 1. The view in second activity is blank. Though I've restored the saved state I can't see anything 2. Instance for the button (with id 100) in second activity is always null</p> <p>While debugging I can see one of the values in the bundle having an id 100</p> <p>Any help on what I seem to be doing wrong will be appreciated. Thanks</p>
 

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