SwitchPreference.java

package moe.feng.nhentai.view.pref;

import android.content.Context;
import android.content.res.TypedArray;
import android.support.v7.widget.SwitchCompat;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;
import android.widget.CompoundButton;

import moe.feng.nhentai.R;

/**
 * A {@link Preference} that provides a two-state toggleable option.
 * <p/>
 * This preference will store a boolean into the SharedPreferences.
 *
 * @attr ref android.R.styleable#SwitchPreference_summaryOff
 * @attr ref android.R.styleable#SwitchPreference_summaryOn
 * @attr ref android.R.styleable#SwitchPreference_switchTextOff
 * @attr ref android.R.styleable#SwitchPreference_switchTextOn
 * @attr ref android.R.styleable#SwitchPreference_disableDependentsState
 */
public class SwitchPreference extends TwoStatePreference
{
	private final Listener mListener = new Listener();

	private CharSequence mSwitchOn;
	private CharSequence mSwitchOff;

	private class Listener implements CompoundButton.OnCheckedChangeListener {
		@Override
		public void onCheckedChanged (CompoundButton buttonView, boolean isChecked) {
			if (!callChangeListener(isChecked)) {
				buttonView.setChecked(!isChecked);
				return;
			}
			SwitchPreference.this.setChecked(isChecked);
		}
	}

	/**
	 * Construct a new SwitchPreference with the given style options.
	 *
	 * @param context      The Context that will style this preference
	 * @param attrs        Style attributes that differ from the default
	 * @param defStyleAttr An attribute in the current theme that contains a
	 *                     reference to a style resource that supplies default values for
	 *                     the view. Can be 0 to not look for defaults.
	 * @param defStyleRes  A resource identifier of a style resource that
	 *                     supplies default values for the view, used only if
	 *                     defStyleAttr is 0 or can not be found in the theme. Can be 0
	 *                     to not look for defaults.
	 */
	public SwitchPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
		super(context, attrs, defStyleAttr, defStyleRes);
	}

	/**
	 * Construct a new SwitchPreference with the given style options.
	 *
	 * @param context      The Context that will style this preference
	 * @param attrs        Style attributes that differ from the default
	 * @param defStyleAttr An attribute in the current theme that contains a
	 *                     reference to a style resource that supplies default values for
	 *                     the view. Can be 0 to not look for defaults.
	 */
	public SwitchPreference(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
	}

	/**
	 * Construct a new SwitchPreference with the given style options.
	 *
	 * @param context The Context that will style this preference
	 * @param attrs   Style attributes that differ from the default
	 */
	public SwitchPreference(Context context,AttributeSet attrs) {
		this(context, attrs, R.attr.switchPreferenceStyle);
	}

	/**
	 * Construct a new SwitchPreference with default style options.
	 *
	 * @param context The Context that will style this preference
	 */
	public SwitchPreference(Context context) {
		this(context, null);
	}

	@Override
	protected void init(final Context context,final AttributeSet attrs,final int defStyleAttr,final int defStyleRes) {
		super.init(context,attrs,defStyleAttr,defStyleRes);
		this.setWidgetLayoutResource(R.layout.custom_preference_widget_switch);

		TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SwitchPreference, defStyleAttr, defStyleRes);
		setSummaryOn(a.getString(R.styleable.SwitchPreference_summaryOn));
		setSummaryOff(a.getString(R.styleable.SwitchPreference_summaryOff));
		setSwitchTextOn(a.getString(R.styleable.SwitchPreference_switchTextOn));
		setSwitchTextOff(a.getString(R.styleable.SwitchPreference_switchTextOff));
		setDisableDependentsState(a.getBoolean(R.styleable.SwitchPreference_disableDependentsState, false));
		a.recycle();
	}

	@Override
	protected void onBindView(View view) {
		super.onBindView(view);
		View checkableView = view.findViewById(android.R.id.checkbox);
		if (checkableView != null && checkableView instanceof Checkable) {
			if (checkableView instanceof SwitchCompat) {
				final SwitchCompat switchView = (SwitchCompat) checkableView;
				switchView.setOnCheckedChangeListener(null);
			}

			((Checkable) checkableView).setChecked(mChecked);

			if (checkableView instanceof SwitchCompat) {
				final SwitchCompat switchView = (SwitchCompat) checkableView;
				switchView.setTextOn(mSwitchOn);
				switchView.setTextOff(mSwitchOff);
				switchView.setOnCheckedChangeListener(mListener);
			}
		}

		syncSummaryView(view);
	}

	/**
	 * Set the text displayed on the switch widget in the on state.
	 * This should be a very short string; one word if possible.
	 *
	 * @param onText Text to display in the on state
	 */
	public void setSwitchTextOn(CharSequence onText) {
		mSwitchOn = onText;
		notifyChanged();
	}

	/**
	 * Set the text displayed on the switch widget in the off state.
	 * This should be a very short string; one word if possible.
	 *
	 * @param offText Text to display in the off state
	 */
	public void setSwitchTextOff(CharSequence offText) {
		mSwitchOff = offText;
		notifyChanged();
	}

	/**
	 * Set the text displayed on the switch widget in the on state.
	 * This should be a very short string; one word if possible.
	 *
	 * @param resId The text as a string resource ID
	 */
	public void setSwitchTextOn(int resId) {
		setSwitchTextOn(getContext().getString(resId));
	}

	/**
	 * Set the text displayed on the switch widget in the off state.
	 * This should be a very short string; one word if possible.
	 *
	 * @param resId The text as a string resource ID
	 */
	public void setSwitchTextOff(int resId) {
		setSwitchTextOff(getContext().getString(resId));
	}

	/**
	 * @return The text that will be displayed on the switch widget in the on state
	 */
	public CharSequence getSwitchTextOn() {
		return mSwitchOn;
	}

	/**
	 * @return The text that will be displayed on the switch widget in the off state
	 */
	public CharSequence getSwitchTextOff() {
		return mSwitchOff;
	}

}