Simple example of SeekBarPreference in Android

There is no predefined SeekBarPreference in Android. But we can make our own SeekBarPreference very simply. Here is simple example of making and using SeekBarPreference in Android.

SeekBarPreference.java

  
public class SeekBarPreference extends Preference implements SeekBar.OnSeekBarChangeListener {
    private TextView textValue;

    public SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    public SeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public SeekBarPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SeekBarPreference(Context context) {
        super(context);
    }

    @Override
    protected View onCreateView(ViewGroup parent) {
        super.onCreateView(parent);
        View view = LayoutInflater.from(getContext()).inflate(R.layout.seekbar, parent, false);
        textValue = view.findViewById(R.id.textValue);
        TextView textTitle = view.findViewById(R.id.textTitle);
        textTitle.setText(getTitle());
        SeekBar seekBar = view.findViewById(R.id.seekBar);
        seekBar.setOnSeekBarChangeListener(this);

        SharedPreferences preferences = getSharedPreferences();
        int value = preferences.getInt(getKey(), 0);
        textValue.setText(String.format(Locale.getDefault(), "%d", value));
        seekBar.setProgress(value);
        return view;
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
        textValue.setText(String.format(Locale.getDefault(), "%d", i));
        SharedPreferences.Editor editor = getEditor();
        editor.putInt(getKey(), i);
        editor.apply();
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }
}

seekbar.xml

  
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="5dp"
    android:paddingTop="5dp">

    <TextView
        android:id="@+id/textTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:textColor="#000"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/textTitle" />

    <TextView
        android:id="@+id/textValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="10dp"
        android:textColor="#000"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/seekBar" />
</android.support.constraint.ConstraintLayout>

Here is the settings.xml used in SettingsActivityFragment.

  
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <com.guna.testapplication.widgets.SeekBarPreference
        android:defaultValue="50"
        android:key="seekBar"
        android:title="Seek Bar" />
</PreferenceScreen>

SettingsActivity.java

 
public class SettingsActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_settings);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

}

SettingsActivityFragment.java

 
public class SettingsActivityFragment extends PreferenceFragment {

    public SettingsActivityFragment() {
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);
    }
}

Here is the full video tutorial

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