CODEWITHSUNDEEP
javaandroidscreen-orientation
Oleksiy
Oleksiy

Reputation: 39810

Why doesn't the emulator behave correctly on orientation change?

As far as I know, by default, when device is rotated, the current activity is destroyed and recreated. I'm rotating the emulator using LeftCTRL+F12 but it's not destroyed. I have logs in OnDestroy, OnCreate and OnStart and OnResume, but none of those fire up when I rotate the device.

Before:

before the change

After:

after the change

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.geo_quiz"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.geo_quiz.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Upvotes: 4

Views: 1557

Answers (4)

Thomas Mok
Thomas Mok

Reputation: 41

Your emulated device, i.e., the phone, (not the emulator) may not have rotation detection turned on. In the phone's settings, turn on rotation detection. Here is a screenshot of what that icon looks like.

1

Upvotes: 3

Keng Onn
Keng Onn

Reputation: 336

I think I know the answer. I have the same problem using the emulator for Pixel 2, API level 28, on Android Studio 3.4.1 (the latest as of writing this).

How I fixed this was by dragging the Quick Settings drop-down menu on the emulator (click and drag from the top right corner of the emulator's screen), and ensuring that auto-rotation was enabled.

When I checked, it wasn't, so I enabled it. After enabling it, the emulator worked normally :).

Hope this helped!

Upvotes: 8

user2350459
user2350459

Reputation: 351

Go to the camera app first, then run your application. The camera app automatically changes your view.

Upvotes: 0

Guy
Guy

Reputation: 12512

Based on your screen shots, it seems that the device was not changing orientation. Your activity still shows a portrait layout. THe only thing that changed is the orientation of the displayed window. When an orientation change happen, your text should be upright, in the screenshot their "up" points to the left. Run it on a real device, and onDestroy will be called. 100% of the time. guaranteed

Edit following Oleksiy comments:

  1. try numpad7 first and then CMD+f12.

  2. Also make sure your ADT is up to date (not just your build tools) - you do that by Eclipse > Check for Updates.

  3. If the above does not work, try to do this programmatically, so you can debug your code (which will work on a real device): call setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); in your onCreate

  4. You shouldn't be doing development with emulator. Its too slow and unreliable. Bunch of stuff won't work there. Work with your device connected. you'll save yourself trouble.

    I also found this bugreport, which was tagged "unreproducable": http://code.google.com/p/android/issues/detail?id=17963

Upvotes: 0

Related Questions