i have called webview in android now i want to preserve state when orientation changes ,
i had called android:configChanges for activity still not working
see below
<activity
android:name=".MainActivity"
android:configChanges="orientation|keyboardHidden|keyboard"/>
#Override
public void onConfigurationChanged(Configuration newConfig){
super.onConfigurationChanged(newConfig);
}
what have i to do to make it work
Try This, It works very fine for me. Add "screenSize" in configChanges
android:configChanges="orientation|keyboardHidden|screenSize"
I wrote a programm,you must fill edittext and save it in the list view but when I rotate my phone the whole information is lost.What can I do not to lose my information?
The layout is reloaded on each screen rotation.
You can bypass this by doing the following:
Add this in the AndroidManifest.xml to the activity that should not be reloaded:
<activity
...
android:configChanges="keyboardHidden|orientation|screenSize"
...
</activity>
In the source code of the activity add the following method:
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
Just leave the method blank, and when the screen rotates nothing will be reloaded.
how i can stop the restarting or recalling of on create() on screen orientation ,i want to stop the recreation of activity on screen orientation. thanks in advance please tell me any better solution its really creating a problem. like in my program i am selecting some picture but on screen orientation the image goes off so thats why i want to stop the recreation of activity on screen orientation.
enter code here
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.mainwindow);
Toast.makeText(getApplicationContext(),"a", 1).show();
bitmap = (Bitmap)getLastNonConfigurationInstance();
//Toast.makeText(getApplicationContext(),"a1", 1).show();
if (savedInstanceState != null)
{
bitmap=BitmapFactory.decodeFile(mImageCaptureUri.getPath());
Toast.makeText(getApplicationContext(),"preview have value", 1).show();
preview.setVisibility(View.VISIBLE);
From_Folder.setVisibility(View.GONE);
From_Camera.setVisibility(View.GONE);
preview.setImageBitmap(bitmap);
}
Up to API 13 there was a new value to the configChanges attribute, screenSize
So if you're using large screens make sure to add screenSize in your configChanges attribute:
android:configChanges="orientation|keyboardHidden|screenSize"
This is happening because when screen orientation rotates the Activity gets re-started. In this case you can add configChanges attribute in your tag in the AndroidManifest file to stop the re-creation of the Activity.
<activity android:name=".Activity_name"
android:configChanges="orientation|keyboardHidden">
By, this also it won't stop though the orientation changes.
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if(newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE){
setContentView(R.layout.login_landscape);
}
else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
setContentView(R.layout.login);
}
}
In your AndroidManifest.xml file, in the activity add
android:configChanges="keyboardHidden|orientation"
Example as below:
<activity android:name=".YourActivity" android:label="#string/app_name" android:configChanges="keyboardHidden|orientation">
Not the best, but maybe the easiest solution is to add
android:configChanges="keyboardHidden|orientation"
to youractivity in your manifest so it looks like
<activity android:name="com.your.activity"
android:configChanges="keyboardHidden|orientation"/>
There are a more full list of parameters for prevent activity recreations (in Manifest.xml):
<activity
android:name = ".MyActivity"
android:configChanges = "orientation|keyboard|keyboardHidden|screenLayout|screenSize">
</activity>
Two ways for this:
Either you can set android:configChanges="keyboardHidden|orientation" in Manifest file to avoid recreation of activity.
Or
Make the changes you want to apply on changing the orientation inside the overrided method
#Override
public void onConfigurationChanged(Configuration newConfig) {
// Perform the actions
super.onConfigurationChanged(newConfig);
}
Add
android:orientation="vertical"
or
android:orientation="horizontal"
to your layout in mainwindow.xml.
Example:::
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
No need to add anything in Activity class.
Hope this may help you
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.