I've looked at many of the other posts for this question and the most common solution is to ensure that you have the following in your manifest:
<activity android:name=".activities.myActivity"
android:configChanges="orientation|keyboard|keyboardHidden|screenSize">
This sub is already in my manifest and I'm not forcing my activity' orientation to landscape or portrait yet onConfigurationChanged(...) is not called.
My onConfigureationChanged(...) function is as follows and I am not receiving the logcat output:
#Override
public void onConfigurationChanged(Configuration newConfig) {
Logger.e(getClass().getSimpleName(), "onConfigurationChanged()");
super.onConfigurationChanged(newConfig);
}
I've also verified that the activity is not going through the standard life cycle by adding loggers in onCreate() and onPause().
OnConfigurationChanged will be called only when the specified config in the AndroidManifest.xml change. For instance, this method will be called after a screen orietation change. If i understood, your app's configs are not changing.
From the Android documentation:
For example, the following manifest code declares an activity that handles both the screen orientation change and keyboard availability change:
<activity android:name=".MyActivity"
android:configChanges="orientation|keyboardHidden"
android:label="#string/app_name">
Now, when one of these configurations change, MyActivity does not restart. Instead, the MyActivity receives a call to onConfigurationChanged(). This method is passed a Configuration object that specifies the new device configuration.
I developed an application in which I don't want sensor.
For that I use,
android:screenOrientation="nosensor" in manifest file.
But, In sliding devices when I open slider It doesn't work. So please give me some solution for that.
You can look at the android:configChanges attribute. By calling android:configChanges="keyboardHidden" you can handle keyboard changes yourself (through the onConfigurationChanged method).
Add the configChanges and catch them using onConfigurationChanged
<activity
android:name=".ABC"
android:configChanges="orientation|keyboardHidden|screenSize"
>
</activity>
configuration change function overridden:
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setContentView(R.layout.main);
}
Add all three and check it. screenSize is added from API13 and is required to catch the slider orientation change.
Is it possible to start an intent when the phone goes from portrait to landscape mode and vice versa?
Thanks!
Yes it is possible.
Add the following to the activity declaration in the manifest:
android:configChanges="orientation"
so it looks like
<activity android:label="#string/app_name"
android:configChanges="orientation|keyboardHidden"
android:name=".your.package">
Write the code to whatever you want in onConfigurationChanged() method
#Override
public void onConfigurationChanged(Configuration newConfig) {
//write your logic here
System.out.println("...inside config change...");
super.onConfigurationChanged(newConfig);
}
Have you tried to implement the OrientationEventListener and load the Intent on onOrientationChanged?
Create a static field in your Activity and check the current orientation in onCreate() using Configuration. If the field is empty, store the configuration, if it's not, check for changes, take the necessary actions and store the new configuration afterwards.
I simply need nothing to change when the screen is rotated. My app displays a random image when it first loads and rotating the device should not select another random image.
How can I (simply) make this behavior stop?
There are generally three ways to do this:
As some of the answers suggested, you could distinguish the cases of your activity being created for the first time and being restored from savedInstanceState. This is done by overriding onSaveInstanceState and checking the parameter of onCreate.
You could lock the activity in one orientation by adding android:screenOrientation="portrait" (or "landscape") to <activity> in your manifest.
You could tell the system that you meant to handle screen changes for yourself by specifying android:configChanges="orientation|screenSize" in the <activity> tag. This way the activity will not be recreated, but will receive a callback instead (which you can ignore as it's not useful for you).
Personally I'd go with (3). Of course if locking the app to one of the orientations is fine with you, you can also go with (2).
Xion's answer was close, but #3 (android:configChanes="orientation") won't work unless the application has an API level of 12 or lower.
In API level 13 or above, the screen size changes when the orientation changes, so this still causes the activity to be destroyed and started when orientation changes.
Simply add the "screenSize" attribute like I did below:
<activity
android:name=".YourActivityName"
android:configChanges="orientation|screenSize">
</activity>
Now, when you change orientation (and screen size changes), the activity keeps its state and onConfigurationChanged() is called. This will keep whatever is on the screen (ie: webpage in a Webview) when the orientation changes.
Learned this from this site:
http://developer.android.com/guide/topics/manifest/activity-element.html
Also, this is apparently a bad practice so read the link below about Handling Runtime Changes:
http://developer.android.com/guide/topics/resources/runtime-changes.html
You just have to go to the AndroidManifest.xml and inside or in your activities labels, you have to type this line of code as someone up there said:
android:configChanges="orientation|screenSize"
So, you'll have something like this:
<activity android:name="ActivityMenu"
android:configChanges="orientation|screenSize">
</activity>
Hope it works!
<activity android:name="com.example.abc"
android:configChanges="orientation|screenSize"></activity>
Just add android:configChanges="orientation|screenSize" in activity tab of manifest file.
So, Activity won't restart when orientation change.
It's my experience that it's actually better to just deal with the orientation changes properly instead of trying to shoehorn a non-default behavior.
You should save the image that's currently being displayed in onSaveInstanceState() and restore it properly when your application runs through onCreate() again.
This solution is by far the best working one. In your manifest file add
<activity
android:configChanges="keyboardHidden|orientation|screenSize"
android:name="your activity name"
android:label="#string/app_name"
android:screenOrientation="landscape">
</activity
And in your activity class add the following code
#Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
//your code
} else if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
//your code
}
}
In manifiest file add to each activity this. This will help
android:configChanges = "orientation|keyboard|keyboardHidden|screenLayout|screenSize"
add android:configChanges="keyboardHidden|orientation|screenSize" for all the app activities tags in manifest.
Just add this to your AndroidManifest.xml
<activity android:screenOrientation="landscape">
I mean, there is an activity tag, add this as another parameter. In case if you need portrait orientation, change landscape to portrait. Hope this helps.
just use : android:configChanges="keyboardHidden|orientation"
As Pacerier mentioned,
android:configChanges="orientation|screenSize"
All above answers are not working for me. So, i have fixed by mentioning the label with screenOrientation like below. Now everything fine
<activity android:name=".activity.VideoWebViewActivity"
android:label="#string/app_name"
android:configChanges="orientation|screenSize"/>
http://animeshrivastava.blogspot.in/2017/08/activity-lifecycle-oncreate-beating_3.html
#Override
protected void onSaveInstanceState(Bundle b)
{
super.onSaveInstanceState(b);
String str="Screen Change="+String.valueOf(screenChange)+"....";
Toast.makeText(ctx,str+"You are changing orientation...",Toast.LENGTH_SHORT).show();
screenChange=true;
}
Prevent Activity to recreated
Most common solution to dealing with orientation changes by setting the android:configChanges flag on your Activity in AndroidManifest.xml. Using this attribute your Activities won’t be recreated and all your views and data will still be there after orientation change.
<activity
android:name="com.example.test.activity.MainActivity"
android:configChanges="orientation|screenSize|keyboardHidden"/>
this is work for me😊😊😊
Save the image details in your onPause() or onStop() and use it in the onCreate(Bundle savedInstanceState) to restore the image.
EDIT:
More info on the actual process is detailed here http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle as it is different in Honeycomb than previous Android versions.
I dont know if the a best solution, but i describe it here:
First of all, you need certificate with you class Application of your app is in your manifest of this:
<application
android:name=".App"
...
Second, in my class App i did like this:
public class App extends Application {
public static boolean isOrientationChanged = false;
#Override
public void onCreate() {
super.onCreate();
}
#Override
public void onConfigurationChanged(#NotNull Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE ||
newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
isOrientationChanged = true;
}
}
}
Third, you need to set a flag to Orientation Change, in my case, I always set it when the previous activity within the app navigation is called, so only calling once when the later activity is created.
isOrientationChanged = false;
So every time I change the orientation of my screen in that context, I set it every time it changes this setting, it checks if there is a change in orientation, if so, it validates it based on the value of that flag.
Basically, I had to use it whenever I made an asynchronous retrofit request, which he called every moment that changed orientation, constantly crashing the application:
if (!isOrientationChanged) {
presenter.retrieveAddress(this, idClient, TYPE_ADDRESS);
}
I don't know if it's the most elegant and beautiful solution, but at least here it's functional :)
Add this code after the onCreate ,method in your activity containing the WebView
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
#Override
protected void onRestoreInstanceState(Bundle state) {
super.onRestoreInstanceState(state);
}
Can you please tell me how can I keep the MediaRecorder keeps recording after an orientation change? I try looking into source code of packages/apps/SoundRecorder/src/com/android/soundrecorder/Recorder.java, I don't see it handles that cases.
Thank you.
This might be because by default the system destroys and recreates the Activity when the orientation changes. You can tell the system that your app handles changes like these by modifying the activity's tag in the manifast like this:
<activity android:name=".UIActivity"
android:configChanges="orientation|keyboardHidden"
android:label="#string/app_name"> ...
</activity>
This way you can react to these changes overriding this method:
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
//---code to redraw your activity here---
//...
}
Here, you can redraw your views to support landscape mode, or do simply nothing.