Android - 切换到相同方向时调用“onConfigurationChanged（）”（即横向反转横向）

Question

I have this in my manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.apps.foo.bar" >

    <uses-feature android:name="android.hardware.camera" />
    <uses-permission android:name="android.permission.CAMERA" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainPreviewActivity"
            android:label="@string/app_name"
            android:screenOrientation="fullSensor"
            android:configChanges="orientation|screenSize" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Now the problem is here:

 @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
         .............
         .................
          ............
    }

This is being called fine when I rotate the screen from portrait to landscape. But once I am in landscape, if I turn to the other landscape (ie 180 degrees) it is not firing. The strange thing is that it fires only from portrait to landscape and landscape to portrait .

Answer 1

Flipping from landscape to reverse landscape is not a configuration change as it is invisible to the environment the app is in and hence the system does not send an event.

You can find more information and alternate solutions here: https://groups.google.com/forum/#!topic/android-developers/IgBNQNgFUmk