How to Set a Seek Bar in Android

Introduction

Hi guys. Today I explain how to work with the seek bar in Android. To demonstrate how it is used to set the Media Player, Ringer, Alarm and Notification volume for your device. So you can easily understand using the following instructions.

Step 1

As usual create a new project file as in the following.

Step 2

Open the "activity_main.xml" file and update it with the following code:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Adjust Media player volume"

        android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>

    <SeekBar

        android:id="@+id/seekBar1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Adjust Ringer volume"

        android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px" />

    <SeekBar

        android:id="@+id/seekBar2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />   

    <TextView

        android:id="@+id/textView2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Adjust Alarm volume"

        android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>

    <SeekBar

        android:id="@+id/seekBar3"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Adjust Notification volume"

        android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>

    <SeekBar

        android:id="@+id/seekBar4"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

Step 3

Open the "MainActivity.java" file and update it with the following code:

package com.example.androidfourthapp;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

public class MainActivity extends Activity {

      @Override

      protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

      }

      @Override

      public boolean onCreateOptionsMenu(Menu menu) {

            // Inflate the menu; this adds items to the action bar if it is present.

            getMenuInflater().inflate(R.menu.main, menu);

            return true;

      }

}

 Step 4

Now create a new Java file named "SeekBarExampleAcitivity.java" with the following code:

package com.example.androidfourthapp;

import android.app.Activity;

import android.content.Context;

import android.media.AudioManager;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

public class SeekBarExampleAcitvity extends Activity{

      private SeekBar mediaVlmSeekBar = null;

      private SeekBar ringerVlmSeekBar = null;

      private SeekBar alarmVlmSeekBar = null;

      private SeekBar notifyVlmSeekBar = null;

      private AudioManager audioManager = null;

      @Override

      protected void onCreate(Bundle savedInstanceState) {

            // TODO Auto-generated method stub

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

            this.setVolumeControlStream(AudioManager.STREAM_MUSIC);       

            this.setVolumeControlStream(AudioManager.STREAM_RING);   

            this.setVolumeControlStream(AudioManager.STREAM_ALARM);

            this.setVolumeControlStream(AudioManager.STREAM_NOTIFICATION);

            initControls();

      }

      private void initControls() {

            //Return the handle to a system-level service - 'AUDIO'.

            audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

            //Find the seekbar 1

            mediaVlmSeekBar = (SeekBar) findViewById(R.id.seekBar1);

            //Set the max range(Volume in this case) of seekbar

            //for Media player volume

            mediaVlmSeekBar.setMax(audioManager

                    .getStreamMaxVolume(AudioManager.STREAM_MUSIC));

            //Set the progress with current Media Volume

            mediaVlmSeekBar.setProgress(audioManager

                    .getStreamVolume(AudioManager.STREAM_MUSIC));

            //Find the seekbar 2

            ringerVlmSeekBar = (SeekBar) findViewById(R.id.seekBar2);

            //Set the max range(Volume in this case) of seekbar

            //for Phone ringer volume

            ringerVlmSeekBar.setMax(audioManager

                    .getStreamMaxVolume(AudioManager.STREAM_RING));

            //Set the progress with current Ringer Volume

            ringerVlmSeekBar.setProgress(audioManager

                    .getStreamVolume(AudioManager.STREAM_RING));

            //Find the seekbar 3

            alarmVlmSeekBar = (SeekBar) findViewById(R.id.seekBar3);

            //Set the max range(Volume in this case) of seekbar

            //for Alarm volume

            alarmVlmSeekBar.setMax(audioManager

                    .getStreamMaxVolume(AudioManager.STREAM_ALARM));

            //Set the progress with current Alarm Volume

            alarmVlmSeekBar.setProgress(audioManager

                    .getStreamVolume(AudioManager.STREAM_ALARM));

            //Find the seekbar 4

            notifyVlmSeekBar = (SeekBar) findViewById(R.id.seekBar4);

            //Set the max range(Volume in this case) of seekbar

            //for Notification volume

            notifyVlmSeekBar.setMax(audioManager

                    .getStreamMaxVolume(AudioManager.STREAM_NOTIFICATION));

            //Set the progress with current Notification Volume

            notifyVlmSeekBar.setProgress(audioManager

                    .getStreamVolume(AudioManager.STREAM_NOTIFICATION));

            try {

                //Listener to receive changes to the SeekBar1's progress level

                mediaVlmSeekBar

                    .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

                public void onStopTrackingTouch(SeekBar arg0) {

                    }

                public void onStartTrackingTouch(SeekBar arg0) {

                    }

                //When progress level of seekbar1 is changed

                public void onProgressChanged(SeekBar arg0,

                    int progress, boolean arg2) {

                audioManager.setStreamVolume(

                    AudioManager.STREAM_MUSIC, progress, 0);

                }

             });

               ringerVlmSeekBar

                     .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

               public void onStopTrackingTouch(SeekBar arg0) {

                    }

               public void onStartTrackingTouch(SeekBar arg0) {

                    }

               //When progress level of seekbar2 is changed

               public void onProgressChanged(SeekBar arg0,

                    int progress, boolean arg2) {

                audioManager.setStreamVolume(

                    AudioManager.STREAM_RING, progress, 0);

                 }

             });

               alarmVlmSeekBar

                    .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

               public void onStopTrackingTouch(SeekBar arg0) {

                    }

               public void onStartTrackingTouch(SeekBar arg0) {

                    }

               //When progress level of seekbar3 is changed

               public void onProgressChanged(SeekBar arg0,

                    int progress, boolean arg2) {

                 audioManager.setStreamVolume(

                        AudioManager.STREAM_ALARM, progress, 0);

                }

             });

               //Listener to receive changes to the SeekBar4's progress level

               notifyVlmSeekBar

                    .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

               public void onStopTrackingTouch(SeekBar arg0) {

                    }

             

               public void onStartTrackingTouch(SeekBar arg0) {

                    }

               //When progress level of seekbar4 is changed

               public void onProgressChanged(SeekBar arg0,

                        int progress, boolean arg2) {

                 audioManager.setStreamVolume(

                    AudioManager.STREAM_NOTIFICATION, progress,0);

                }

             });

            } catch (Exception e) {

                e.printStackTrace();

            }

            }

}

Step 5

See the output.