Android SeekBar Example

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:id="@+id/rl"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:padding="10dp"     tools:context=".MainActivity"     android:background="#c6d1c6"     >     <TextView         android:id="@+id/tv"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:textSize="35sp"         android:layout_centerHorizontal="true"         />     <!--         SeekBar             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 level or use the arrow keys.             Placing focusable widgets to the left or right of a SeekBar is discouraged.              Clients of the SeekBar can attach a SeekBar.OnSeekBarChangeListener to be notified             of the user's actions.     -->     <SeekBar         android:id="@+id/seekbar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:max="100"         android:layout_below="@id/tv"         /> </RelativeLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.content.Context; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Window; import android.widget.RelativeLayout; import android.widget.SeekBar; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {     private Context mContext;      private RelativeLayout mRelativeLayout;     private SeekBar mSeekBar;     private TextView mTextView;      @Override     protected void onCreate(Bundle savedInstanceState) {         // Request window feature action kafe         requestWindowFeature(Window.FEATURE_ACTION_BAR);         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the application context         mContext = getApplicationContext();          // Change the action kafe color         getSupportActionBar().setBackgroundDrawable(                 new ColorDrawable(Color.parseColor("#FFFF00BF"))         );          // Get the widgets reference from XML layout         mRelativeLayout = (RelativeLayout) findViewById(R.id.rl);         mSeekBar = (SeekBar) findViewById(R.id.seekbar);         mTextView = (TextView) findViewById(R.id.tv);          /*             SeekBar.OnSeekBarChangeListener                 A callback that notifies clients when the progress level has been changed. This                 includes changes that were initiated by the user through a touch gesture or arrow                 key/trackball as well as changes that were initiated programmatically.         */          // Set a SeekBar change listener         mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {             /*                 public abstract void onProgressChanged (SeekBar seekBar, int progress, boolean fromUser)                     Notification that the progress level has changed. Clients can use the fromUser                     parameter to distinguish user-initiated changes from those that                     occurred programmatically.                  Parameters                     seekBar : The SeekBar whose progress has changed                     progress : The current progress level. This will be in the range 0..max where                         max was set by setMax(int). (The default value for max is 100.)                     fromUser : True if the progress change was initiated by the user.             */             @Override             public void onProgressChanged(SeekBar seekBar, int i, boolean b) {                 // Display the current progress of SeekBar                 mTextView.setText(""+i);             }              /*                 public abstract void onStartTrackingTouch (SeekBar seekBar)                     Notification that the user has started a touch gesture. Clients may want to use                     this to disable advancing the SeekBar.                  Parameters                     seekBar : The SeekBar in which the touch gesture began             */             @Override             public void onStartTrackingTouch(SeekBar seekBar) {              }              /*                 public abstract void onStopTrackingTouch (SeekBar seekBar)                     Notification that the user has finished a touch gesture. Clients may want to                     use this to re-enable advancing the SeekBar.                  Parameters                     seekBar : The SeekBar in which the touch gesture began             */             @Override             public void onStopTrackingTouch(SeekBar seekBar) {              }         });     } }