How to set ringtone in Android from Android activity?

This example demonstrates how do I set ringtone in android from android activity.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <Button
      android:id="@+id/btnSelRingtone"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:text="Select Ringtone"/>
   <TextView
      android:id="@+id/tvRingtone"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:textStyle="bold|italic"
      android:layout_below="@id/btnSelRingtone"
      android:text="Ringtone Path"/>
</RelativeLayout>
Step 3 − Add the following code to src/MainActivity.java
import android.annotation.SuppressLint;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
   Button btn;
   TextView txtView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      btn = findViewById(R.id.btnSelRingtone);
      txtView = findViewById(R.id.tvRingtone);
      btn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View view) {
            //Intent to select Ringtone.
            final Uri currentTone=
               RingtoneManager.getActualDefaultRingtoneUri(MainActivity.this,
               RingtoneManager.TYPE_ALARM);
            Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "Select Tone");
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, currentTone);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, false);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);
            startActivityForResult(intent, 999);
         }
      });
   }
   @SuppressLint("SetTextI18n")
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      if(requestCode == 999 && resultCode == RESULT_OK){
         Uri uri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
         txtView.setText("From :" + uri.getPath());
      }
   }
}
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   package="app.com.sample">
   <uses-permission
      android:name="android.permission.WRITE_SETTINGS"
      tools:ignore="ProtectedPermissions" />
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action
               android:name="android.intent.action.MAIN" />
            <category
               android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −