Android SeekBar Tutorial
View more Tutorials:

A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch the thumb and drag left or right to set the current progress or use the arrow keys. Placing focusable widgets to the left or right of a SeekBar is discouraged.

Here are some samples seekbar:

Create a Project named SeekBarDemo.
- File > New > New Project > Empty Activity
- Name: SeekBarDemo
- Package name: org.o7planning.seekbardemo
- Language: Java
The interface of the application is quite simple, it is similar to the illustration below, if you are interested in the interface design steps, please see the appendix at the end of the article.

activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <SeekBar android:id="@+id/seekBar" android:layout_width="0dp" android:layout_height="27dp" android:layout_marginStart="19dp" android:layout_marginLeft="19dp" android:layout_marginTop="43dp" android:layout_marginEnd="21dp" android:layout_marginRight="21dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <TextView android:id="@+id/textView" android:layout_width="0dp" android:layout_height="24dp" android:layout_marginStart="22dp" android:layout_marginLeft="22dp" android:layout_marginTop="34dp" android:layout_marginEnd="21dp" android:layout_marginRight="21dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/seekBar" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="1dp" android:layout_marginLeft="1dp" android:layout_marginTop="50dp" android:layout_marginEnd="1dp" android:layout_marginRight="1dp" android:orientation="horizontal" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/textView"> <Button android:id="@+id/button_decrease" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="-" /> <Button android:id="@+id/button_increase" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="+" /> </LinearLayout> </androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package org.o7planning.seekbardemo; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private SeekBar seekBar; private TextView textView; private Button buttonDecrease; private Button buttonIncrease; private static int DELTA_VALUE = 5; private static final String LOGTAG = "SeekBarDemo"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // this.seekBar = (SeekBar) findViewById(R.id.seekBar ); this.textView = (TextView) findViewById(R.id.textView); this.buttonDecrease= (Button) findViewById(R.id.button_decrease); this.buttonIncrease= (Button) findViewById(R.id.button_increase); this.seekBar.setMax(100); this.seekBar.setProgress(15); this.textView.setText("Progress: " + seekBar.getProgress() + "/" + seekBar.getMax()); // this.seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { int progress = 0; // When Progress value changed. @Override public void onProgressChanged(SeekBar seekBar, int progressValue, boolean fromUser) { progress = progressValue; textView.setText("Progress: " + progressValue + "/" + seekBar.getMax()); Log.i(LOGTAG, "Changing seekbar's progress"); Toast.makeText(getApplicationContext(), "Changing seekbar's progress", Toast.LENGTH_SHORT).show(); } // Notification that the user has started a touch gesture. @Override public void onStartTrackingTouch(SeekBar seekBar) { Log.i(LOGTAG, "Started tracking seekbar"); Toast.makeText(getApplicationContext(), "Started tracking seekbar", Toast.LENGTH_SHORT).show(); } // Notification that the user has finished a touch gesture @Override public void onStopTrackingTouch(SeekBar seekBar) { textView.setText("Progress: " + progress + "/" + seekBar.getMax()); Log.i(LOGTAG, "Stopped tracking seekbar"); Toast.makeText(getApplicationContext(), "Stopped tracking seekbar", Toast.LENGTH_SHORT).show(); } }); this.buttonDecrease.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { decreateProgress(); } }); this.buttonIncrease.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { increateProgress(); } }); } private void decreateProgress() { int progress= this.seekBar.getProgress(); if(progress - DELTA_VALUE < 0) { this.seekBar.setProgress(0); } else { this.seekBar.setProgress(progress - DELTA_VALUE); } textView.setText("Progress: " + seekBar.getProgress()+ "/" + seekBar.getMax()); } private void increateProgress() { int progress= this.seekBar.getProgress(); if(progress + DELTA_VALUE > this.seekBar.getMax()) { this.seekBar.setProgress(0); }else { this.seekBar.setProgress(progress + DELTA_VALUE); } textView.setText("Progress: " + seekBar.getProgress()+ "/" + seekBar.getMax()); } }
Running apps:

- TODO
Steps to design an application interface:


Add TextView:


Add 2 Buttons:


Set ID, Text for components on the interface:
