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.
newseekbar.jpg
Step 2
Open the "activity_main.xml" file and update it with the following code:
  1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2. xmlns:tools="http://schemas.android.com/tools"
  3. android:paddingBottom="@dimen/activity_vertical_margin"
  4. android:paddingLeft="@dimen/activity_horizontal_margin"
  5. android:paddingRight="@dimen/activity_horizontal_margin"
  6. android:paddingTop="@dimen/activity_vertical_margin"
  7. tools:context=".MainActivity"
  8. android:layout_width="fill_parent"
  9. android:layout_height="fill_parent"
  10. android:orientation="vertical" >
  11. <TextView
  12. android:id="@+id/textView1"
  13. android:layout_width="match_parent"
  14. android:layout_height="wrap_content"
  15. android:text="Adjust Media player volume"
  16. android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>
  17. <SeekBar
  18. android:id="@+id/seekBar1"
  19. android:layout_width="match_parent"
  20. android:layout_height="wrap_content"
  21. />
  22. <TextView
  23. android:id="@+id/textView2"
  24. android:layout_width="match_parent"
  25. android:layout_height="wrap_content"
  26. android:text="Adjust Ringer volume"
  27. android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px" />
  28. <SeekBar
  29. android:id="@+id/seekBar2"
  30. android:layout_width="match_parent"
  31. android:layout_height="wrap_content" />
  32. <TextView
  33. android:id="@+id/textView2"
  34. android:layout_width="match_parent"
  35. android:layout_height="wrap_content"
  36. android:text="Adjust Alarm volume"
  37. android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>
  38. <SeekBar
  39. android:id="@+id/seekBar3"
  40. android:layout_width="match_parent"
  41. android:layout_height="wrap_content" />
  42. <TextView
  43. android:id="@+id/textView2"
  44. android:layout_width="match_parent"
  45. android:layout_height="wrap_content"
  46. android:text="Adjust Notification volume"
  47. android:textAppearance="?android:attr/textAppearanceLarge" android:padding="10px"/>
  48. <SeekBar
  49. android:id="@+id/seekBar4"
  50. android:layout_width="match_parent"
  51. android:layout_height="wrap_content" />
  52. </LinearLayout>
Step 3
Open the "MainActivity.java" file and update it with the following code:
  1. package com.example.androidfourthapp;
  2. import android.os.Bundle;
  3. import android.app.Activity;
  4. import android.view.Menu;
  5. public class MainActivity extends Activity {
  6. @Override
  7. protected void onCreate(Bundle savedInstanceState) {
  8. super.onCreate(savedInstanceState);
  9. setContentView(R.layout.activity_main);
  10. }
  11. @Override
  12. public boolean onCreateOptionsMenu(Menu menu) {
  13. // Inflate the menu; this adds items to the action bar if it is present.
  14. getMenuInflater().inflate(R.menu.main, menu);
  15. return true;
  16. }
  17. }
Step 4
Now create a new Java file named "SeekBarExampleAcitivity.java" with the following code:
  1. package com.example.androidfourthapp;
  2. import android.app.Activity;
  3. import android.content.Context;
  4. import android.media.AudioManager;
  5. import android.os.Bundle;
  6. import android.widget.SeekBar;
  7. import android.widget.SeekBar.OnSeekBarChangeListener;
  8. public class SeekBarExampleAcitvity extends Activity{
  9. private SeekBar mediaVlmSeekBar = null;
  10. private SeekBar ringerVlmSeekBar = null;
  11. private SeekBar alarmVlmSeekBar = null;
  12. private SeekBar notifyVlmSeekBar = null;
  13. private AudioManager audioManager = null;
  14. @Override
  15. protected void onCreate(Bundle savedInstanceState) {
  16. // TODO Auto-generated method stub
  17. super.onCreate(savedInstanceState);
  18. setContentView(R.layout.activity_main);
  19. this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
  20. this.setVolumeControlStream(AudioManager.STREAM_RING);
  21. this.setVolumeControlStream(AudioManager.STREAM_ALARM);
  22. this.setVolumeControlStream(AudioManager.STREAM_NOTIFICATION);
  23. initControls();
  24. }
  25. private void initControls() {
  26. //Return the handle to a system-level service - 'AUDIO'.
  27. audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
  28. //Find the seekbar 1
  29. mediaVlmSeekBar = (SeekBar) findViewById(R.id.seekBar1);
  30. //Set the max range(Volume in this case) of seekbar
  31. //for Media player volume
  32. mediaVlmSeekBar.setMax(audioManager
  33. .getStreamMaxVolume(AudioManager.STREAM_MUSIC));
  34. //Set the progress with current Media Volume
  35. mediaVlmSeekBar.setProgress(audioManager
  36. .getStreamVolume(AudioManager.STREAM_MUSIC));
  37. //Find the seekbar 2
  38. ringerVlmSeekBar = (SeekBar) findViewById(R.id.seekBar2);
  39. //Set the max range(Volume in this case) of seekbar
  40. //for Phone ringer volume
  41. ringerVlmSeekBar.setMax(audioManager
  42. .getStreamMaxVolume(AudioManager.STREAM_RING));
  43. //Set the progress with current Ringer Volume
  44. ringerVlmSeekBar.setProgress(audioManager
  45. .getStreamVolume(AudioManager.STREAM_RING));
  46. //Find the seekbar 3
  47. alarmVlmSeekBar = (SeekBar) findViewById(R.id.seekBar3);
  48. //Set the max range(Volume in this case) of seekbar
  49. //for Alarm volume
  50. alarmVlmSeekBar.setMax(audioManager
  51. .getStreamMaxVolume(AudioManager.STREAM_ALARM));
  52. //Set the progress with current Alarm Volume
  53. alarmVlmSeekBar.setProgress(audioManager
  54. .getStreamVolume(AudioManager.STREAM_ALARM));
  55. //Find the seekbar 4
  56. notifyVlmSeekBar = (SeekBar) findViewById(R.id.seekBar4);
  57. //Set the max range(Volume in this case) of seekbar
  58. //for Notification volume
  59. notifyVlmSeekBar.setMax(audioManager
  60. .getStreamMaxVolume(AudioManager.STREAM_NOTIFICATION));
  61. //Set the progress with current Notification Volume
  62. notifyVlmSeekBar.setProgress(audioManager
  63. .getStreamVolume(AudioManager.STREAM_NOTIFICATION));
  64. try {
  65. //Listener to receive changes to the SeekBar1's progress level
  66. mediaVlmSeekBar
  67. .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
  68. public void onStopTrackingTouch(SeekBar arg0) {
  69. }
  70. public void onStartTrackingTouch(SeekBar arg0) {
  71. }
  72. //When progress level of seekbar1 is changed
  73. public void onProgressChanged(SeekBar arg0,
  74. int progress, boolean arg2) {
  75. audioManager.setStreamVolume(
  76. AudioManager.STREAM_MUSIC, progress, 0);
  77. }
  78. });
  79. ringerVlmSeekBar
  80. .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
  81. public void onStopTrackingTouch(SeekBar arg0) {
  82. }
  83. public void onStartTrackingTouch(SeekBar arg0) {
  84. }
  85. //When progress level of seekbar2 is changed
  86. public void onProgressChanged(SeekBar arg0,
  87. int progress, boolean arg2) {
  88. audioManager.setStreamVolume(
  89. AudioManager.STREAM_RING, progress, 0);
  90. }
  91. });
  92. alarmVlmSeekBar
  93. .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
  94. public void onStopTrackingTouch(SeekBar arg0) {
  95. }
  96. public void onStartTrackingTouch(SeekBar arg0) {
  97. }
  98. //When progress level of seekbar3 is changed
  99. public void onProgressChanged(SeekBar arg0,
  100. int progress, boolean arg2) {
  101. audioManager.setStreamVolume(
  102. AudioManager.STREAM_ALARM, progress, 0);
  103. }
  104. });
  105. //Listener to receive changes to the SeekBar4's progress level
  106. notifyVlmSeekBar
  107. .setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
  108. public void onStopTrackingTouch(SeekBar arg0) {
  109. }
  111. public void onStartTrackingTouch(SeekBar arg0) {
  112. }
  113. //When progress level of seekbar4 is changed
  114. public void onProgressChanged(SeekBar arg0,
  115. int progress, boolean arg2) {
  116. audioManager.setStreamVolume(
  117. AudioManager.STREAM_NOTIFICATION, progress,0);
  118. }
  119. });
  120. } catch (Exception e) {
  121. e.printStackTrace();
  122. }
  123. }
  124. }
Step 5
See the output.
SeekBarOutput.jpg