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POTheme change doesn't work on <4.0 as it should
 

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  1. POTheme change doesn't work on <4.0 as it should
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    <p>I have some difficulties with setting up a "theme switcher" programmatically. I would like to switch themes from app (between White (Theme.Light.NoTitleBar) and Dark (Theme.Black.NoTitleBar)) and what I do is: I set a SharedPreference:</p> <pre><code>final String PREFS_NAME = "MyPrefsFile"; final SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); final SharedPreferences.Editor editor = settings.edit(); </code></pre> <p>and than I have a two buttons to switch themes (second one is almost identical)</p> <pre><code>Button ThemeWhite = (Button) findViewById(R.id.ThemeWhite); ThemeWhite.setOnClickListener(new OnClickListener() { public void onClick(View v) { editor.putBoolean("Theme", false); editor.commit(); System.exit(2); } }); </code></pre> <p>and in begging of each activity I check SharedPreference</p> <pre><code>boolean theme = settings.getBoolean("Theme", false); if(theme){ this.setTheme(R.style.Theme_NoBarBlack); } else{ this.setTheme(R.style.Theme_NoBar); } setContentView(R.layout.aplikacja); </code></pre> <p>I define themes in file <em>styles.xml</em> in folder values:</p> <pre><code>&lt;resources&gt; &lt;style name="Theme.NoBar" parent="@android:style/Theme.Light.NoTitleBar" /&gt; &lt;style name="Theme.NoBarBlack" parent="@android:style/Theme.NoTitleBar" /&gt; </code></pre> <p></p> <p>in values-v11:</p> <pre><code>&lt;resources&gt; &lt;style name="Theme.NoBar" parent="@android:style/Theme.Holo.Light.NoActionBar" /&gt; &lt;style name="Theme.NoBarBlack" parent="@android:style/Theme.Holo.NoActionBar" /&gt; </code></pre> <p></p> <p>in values-v14:</p> <pre><code>&lt;resources&gt; &lt;style name="Theme.NoBar" parent="@android:style/Theme.DeviceDefault.Light.NoActionBar" /&gt; &lt;style name="Theme.NoBarBlack" parent="@android:style/Theme.DeviceDefault.NoActionBar" /&gt; </code></pre> <p></p> <p>manifest file:</p> <pre><code> &lt;application ... android:theme="@style/Theme.NoBar" &gt; </code></pre> <p>Everything is working excellent on android >4.0 <strong>but when I use 2.2 it doesn't change theme</strong> - just font is getting white as it should be but there is no dark background.</p> <p>I tried checking if it at least works and changed Theme.NoBarBlack in values (for android &lt;3.0) and its value the same as Theme.NoBar and then when I pressed button font wasn't changed -as it should do.</p> <p>EDIT (<strong>PROBLEM FOUND</strong>): So after trying it turn out that on Android 2.2 Manifest file set Background and rest, and programmatically changing theme affect only text color. any idea why that happens?</p> <p><strong>ANSWER (as I don't have 10 reputation):</strong> On android &lt;3.0 it matters if </p> <pre><code>super.onCreate(savedInstanceState); </code></pre> <p>Is before setting up theme or not.</p> <p>So it should be:</p> <pre><code>public void onCreate(Bundle savedInstanceState) { setTheme(R.style.Theme_NoBar); super.onCreate(savedInstanceState); setContentView(R.layout.lista); } </code></pre> <p>Sorry guys for making problem out of nothing but as it was working on >3.0 I was confused. Spend half of day on it but working. :)</p>
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