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POHow to prevent the layout from getting reset when the screen orientation changes?
 

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  1. POHow to prevent the layout from getting reset when the screen orientation changes?
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    <p>My example is adapted from one of the sample applications that come with one of the compatibility libraries. That's the layout file:</p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="8dp"&gt; &lt;TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textAppearance="?android:attr/textAppearanceMedium" android:text="@string/fragment_menu_msg" /&gt; &lt;CheckBox android:id="@+id/menu1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:checked="true" android:text="@string/fragment1menu"&gt; &lt;/CheckBox&gt; &lt;CheckBox android:id="@+id/menu2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:checked="true" android:text="@string/fragment2menu"&gt; &lt;/CheckBox&gt; &lt;/LinearLayout&gt; </code></pre> <p>And here some Java code:</p> <pre><code>@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_menu); ViewGroup layout = (ViewGroup) findViewById(R.id.layout); Button btn = new Button(getApplication()); btn.setId(1); btn.setText("Button 1"); layout.addView(btn); mCheckBox1 = (CheckBox) findViewById(R.id.menu1); mCheckBox1.setOnClickListener(mClickListener); } final OnClickListener mClickListener = new OnClickListener() { public void onClick(View v) { ViewGroup layout = (ViewGroup) findViewById(R.id.layout); Button btn = new Button(v.getContext()); btn.setId(2); btn.setText("Button 2"); layout.addView(btn); } }; </code></pre> <p>The activity starts, you disable the first checkbox, one button (button 2) is added to the layout, you change the screen orientation and button 2 (added in the onClickListener method) disappears.</p> <p><a href="http://s14.directupload.net/file/d/2931/zvqkubis_png.htm" rel="nofollow">Screenshots on Directupload.net</a></p> <p>I have read a lot of stuff about <a href="http://developer.android.com/guide/topics/resources/runtime-changes.html" rel="nofollow">Handling Runtime Changes</a> but I still don't have a clear picture how to prevent Button 2 to disappear in the avobe example. Any help is highly appreciated.</p>
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      1. POHow to prevent the layout from getting reset when the screen orientation changes?
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    1. COThis is already discussed http://stackoverflow.com/questions/2730855/prevent-screen-rotation-android
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    2. COPlease note this (android:screenOrientation="portrait") is just hiding a bug in your app, making it less likely for users to trip over it.
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