Force “portrait” orientation mode

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I’m trying to force the “portrait” mode for my application because my application is absolutely not designed for the “landscape” mode.

After reading some forums, I added these lines in my manifest file:

<application 
  android:debuggable="true"
  android:icon="@drawable/icon" 
  android:label="@string/app_name"
  android:screenOrientation="portrait">

But it doesn’t work on my device (HTC Desire). It switches from “portrait” lo “landscape”, ignoring the lines from the manifest file.

After more forums reading, I tried to add this in my manifest file:

<application 
  android:debuggable="true"
  android:icon="@drawable/icon" 
  android:label="@string/app_name"
  android:configChanges="orientation"       
  android:screenOrientation="portrait">

and this function in my activity class:

public void onConfigurationChanged(Configuration newConfig)
{
    super.onConfigurationChanged(newConfig);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

But again, no luck.

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