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how can i control orientation so that I can change the Activity Lifecycle(onDestroy) in android studio?

I can control orientation in eclipse but I need now change orientation in the android studio.In eclipse I find android manifest file and solved the problem from the file.But in android studio, I only find manifest.xml file.
I also saw the link
So,how can I solve the problem?

You don't need to declare screen orientation in the Manifest.xml file, you can set the screen's orientation in the onCreate method in your Activity which is called when your program runs.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
You can use other orientations as well. This will keep the orientation the same throughout the program's lifecycle.
If however, you want it to return to another setting after OnDestroy is called, simply save the orientation setting using sharedPreferences (https://developer.android.com/reference/android/content/SharedPreferences.html) and then write an if else statement to change the value after the event.

To control orientation ,you have to override the attribute android:configChanges of activity in manifest.
like
`<activity android:name=".MyActivity"
android:configChanges="orientation|keyboardHidden"
android:label="#string/app_name">`
for more detail go through this https://developer.android.com/guide/topics/resources/runtime-changes.html

While rotating device a onActivityCreated() of previous class is always called

I am new to android.I have one problem.I am using fragments.My application has 5 tabs.My application stopped unexpectedly after one particular tab then moves to another tab and rotates the current view.By debugging I got the error.Error is that while rotating current view control goes to onActivtyCreated() of previous class.
datetext.setText(TimeFormater.FormatDate(dateString));
This line gives the null pointer exception.Control always goes to the code given below.
public class ScheduleDailyView extends SherlockFragment{public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
nextbutn = (Button)getActivity().findViewById(R.id.buttonnext);
prebutn = (Button)getActivity().findViewById(R.id.buttonpre);
listview = (ListView)getActivity().findViewById(R.id.lv_schedule_listView);
datetext = (TextView)getActivity().findViewById(R.id.textscheduleviewdate);
dateString = TimeFormater.DateToString(Schedule.currentDate.getTime());
ArrayList<ViewScheduleDTO> scheduleList =scheduleDaily.readschedules(dateString,doctor_id);
datetext.setText(TimeFormater.FormatDate(dateString));
rowitems = scheduleDaily.getScheduleRowList(dateString,scheduleList);
listview.setAdapter(new ScheduleCustomView(appContext, rowitems));
if(userType.equals(UserTypeEnum.Admin.getDisplayName()) || userType.equals(UserTypeEnum.Doctor.getDisplayName()))
listview.setOnItemLongClickListener(this);
listview.setOnItemClickListener(this);
nextbutn.setOnClickListener(this);
prebutn.setOnClickListener(this);
}}

Try this... add this line in your manifest.xml
<activity android:name="Your Activity Name"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:windowSoftInputMode="adjustPan"/>

Whenever device screen is rotated the present activity is recreated. In which orientation you want your application to be.. You can fix it in by declaring it in manifest file.... If it is in both orientations the go through the following link :
Handling Runtime Changes
Hope this will help you....

Check the orientation in Manifest.xml file. Changing from portrait to landscape or vice versa might help.

TextView's text disappearing when device rotated

I am writing a phone dialer app for android. I created a layout for keypad, which contains a TextView and 10 buttons. Buttons are as keys for 10 digits(0 to 9) and TextView is for displaying the number according to keys pressed.
In my app, i am appending the text ("0" or "1", etc.) to the TextView for each button pressed. If i pressed the buttons 1, 2, 3 then the text on TextView is 123.
The problem is, let's take the screen is in landscape mode and TextView contains 123, if i turn it, in portrait mode no text on TextView.
Please Help Me Regarding this.

What #jeet recommended didn't work for me. I had to add "screenSize". This is the line you should add in your manifest.xml in the <activity> node of your activity:
android:configChanges="keyboardHidden|orientation|screenSize"
Thus, the complete node may look like this:
<activity
android:name=".YourActivity"
android:label="#string/app_name"
android:configChanges="keyboardHidden|orientation|screenSize"
android:theme="#style/AppTheme.NoActionBar">

Please check on orientation change, on create method is called, which requires all the views to be created again, so you need to use one of the following methods:
use onSavedInstance method and save the states of components/views to bundle.
Just use following flag true in your manifest file in activity tag android:configChanges="keyboardHidden|orientation". like below:
<activity android:name=".SampleActivity" android:label="#string/app_name"
android:configChanges="keyboardHidden|orientation">
...
</activity>

The reason for this is due to Android basically destroying the activity and creating it again every time you rotate the device. This is mainly to allow for different layouts based on portrait/landscape mode.
The best way to handle this is to store whatever data you need to keep within the Activity Bundle, by responding to the onSavedInstance event (called just before Android destroys the activity), and then reapplying those in the standard onCreate event.
Although you can add "orientation" to the configChanges property, keep in mind that you're basically telling Android that you're going to be handling everything relating to orientation change yourself - including changing layout, etc.

To preserve a TextView's text, you can simply set the TextView's freezesText property to true.
As in:
<TextView
...
android:freezesText="true"
.../>
This is the accepted answer here:
Restoring state of TextView after screen rotation?

If someone is still having troubles... this did the trick for me
public class BranjeKP extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_branje_kp);
//...
}
#Override
protected void onSaveInstanceState(Bundle out) {
super.onSaveInstanceState(out);
out.putString("TVNazivPod", TVNazivPodatka.getText().toString());
out.putString("TVEnotaMere", TVEnotaMere.getText().toString());
}
#Override
protected void onRestoreInstanceState(Bundle in) {
super.onRestoreInstanceState(in);
TVNazivPodatka.setText(in.getString("TVNazivPod"));
TVEnotaMere.setText(in.getString("TVEnotaMere"));
}
You basically save any values you want before rotation (that's when onSaveInstanceState is called) into a Bundle and after rotation (onRestoreInstanceState) you just pull all values out from Bundle.
Just to clarify, TVNazivPodatka and TVEnotaMere are TextView widgets.
...with a help from
How to prevent custom views from losing state across screen orientation changes

Don't reload application when orientation changes

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);
}

How to avoid restarting activity when orientation changes on Android

I am creating an Android app in which I'm drawing a view on a canvas. When the device's orientation changes, the activity restarts. I don't want it to.
How can I avoid restarting the activity when the orientation changes?

There are various ways to do it, but as given here, using
android:configChanges="keyboardHidden|orientation|screenSize"
allows you to listen for the config changes. You then respond to these changes by overriding onConfigurationChanged and calling setContentView.
This is the way I've been doing it, but I'd be interested to know other people's thoughts.

Define your activity in the AndroidManifest.xml like this:
<activity
android:name="com.name.SampleActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:icon="#drawable/sample_icon"
android:label="#string/sample_title"
android:screenOrientation="portrait" >
</activity>

Check in your android manifest file that you have written android:configChanges="orientation" on the activity..

I tried to write android:configChanges="keyboardHidden|orientation|screenSize" in activity tag but in not works.
I tried a lot of methods but nothing works until I added android:configChanges="keyboardHidden|orientation|screenSize" for all the app activities and it works perfectly.

For xamarin users,
To avoid the application restart on orientation change in Android, add this
ConfigurationChanges = Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize
to Activity attribute of all Activity classes.
For example, below is my demo code
[Activity(Label = "DemoApp", ConfigurationChanges = Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
{
protected override void OnCreate(Bundle bundle)
{
//Some code here
}
}

Add android:configChanges="keyboardHidden|orientation" to your activity

I would recommend using Fragments. You can simply use setRetainInstance(true) to notify that you want to keep your fragment.

Add this to all of your activities in the manifest.
android:configChanges="orientation|screenSize"
Example:
<activity android:name=".activity.ViewActivity"
android:label="#string/app_name"
android:configChanges="orientation|screenSize"/>

TO avoid restart on keyboardHidden|orientation - How to disable orientation change in Android?Please follow Android API guide - Handling Runtime Changes Using the Application Class - Activity restart on rotation Android

Declare this in your AndroidManifest.xml
<activity android:name=".complex_examples.VideoPlayerActivity"
android:configChanges="keyboard|keyboardHidden|orientation
|screenSize|screenLayout|smallestScreenSize|uiMode"
android:launchMode="singleTop"/>
But take care, Android Developers Documentation says that you should do it only if there is no better options left.
Note: Using this attribute should be avoided and used only as a last
resort. Please read Handling Runtime Changes for more information
about how to properly handle a restart due to a configuration change.
If you are sure about doing it, you can handle the configuration changes by your self in onConfigurationChanged() method.

To stop from destroying the activity on rotation
`android:configChanges="keyboardHidden|orientation|screenSize"`

just add android:configChanges="keyboardHidden|orientation|screenSize" for all the app activities in the manifest file

For me occur when change the night mode, only write this in the manifest:
android:configChanges="uiMode"

Put this under AndroidManifest.xml
<activity android:name=".MainActivity"android:configChanges="orientation|screenSize">
please let me know if it worked(It worked for me, I'm new to Android studio)
I saw this code on web.

If you are using a "TextView" field to output answers it will reset on orientation changes.
Take note that "EditText" fields do not reset on orientation changes. with no additional code needed.
However, "android:inputType="none" does not work.
"android:editable="false"" works but its depreciated.
I'm using the latest version of Android Studio (Bumblebee)

If you use this code in your Android Manifest file in Android Studio Bumblebee:
<activity android:name=".MainActivity"android:configChanges="keyboardHidden|orientation|screenSize">
You need additional code as this code above messes your layout up when you change orientation. However, it keeps the text/numbers in your choice of text input fields respectively.