SeekBarPreference.java

package com.samknows.measurement.activity.components;

import com.samknows.libcore.R;
import com.samknows.measurement.util.TimeUtils;

import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.preference.DialogPreference;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.LinearLayout;

public class SeekBarPreference extends DialogPreference implements
		SeekBar.OnSeekBarChangeListener {
	private static final String androidns = "http://schemas.android.com/apk/res/android";

	private SeekBar mSeekBar;
	private TextView mSplashText, mValueText;
	private final Context mContext;

	private int initialValue;

	private final String mDialogMessage;
	private final String mPrefix;
	private final int mDefault;
	private int mMax;
	private int mValue = 0;

	public SeekBarPreference(Context context, AttributeSet attrs) {
		super(context, attrs);
		mContext = context;
		mDialogMessage = attrs.getAttributeValue(androidns, "dialogMessage");
		mPrefix = context.getString(attrs.getAttributeResourceValue(androidns, "text",0));
		mDefault = attrs.getAttributeIntValue(androidns, "defaultValue", 0);
		mMax = attrs.getAttributeIntValue(androidns, "max", 100);
	}

	@Override
	protected void onDialogClosed(boolean positiveResult) {
		if (!positiveResult) {
			mSeekBar.setProgress(initialValue);
			callChangeListener(initialValue);
		}
	}

	@Override
	protected View onCreateDialogView() {
		LinearLayout.LayoutParams params;
		LinearLayout layout = new LinearLayout(mContext);
		layout.setOrientation(LinearLayout.VERTICAL);
		layout.setPadding(6, 6, 6, 6);

		mSplashText = new TextView(mContext);
		if (mDialogMessage != null)
			mSplashText.setText(mDialogMessage);
		layout.addView(mSplashText);

		mValueText = new TextView(mContext);
		mValueText.setGravity(Gravity.CENTER_HORIZONTAL);
		mValueText.setTextSize(32);
		params = new LinearLayout.LayoutParams(
				LinearLayout.LayoutParams.MATCH_PARENT,
				LinearLayout.LayoutParams.WRAP_CONTENT);
		layout.addView(mValueText, params);

		mSeekBar = new SeekBar(mContext);
		mSeekBar.setOnSeekBarChangeListener(this);

		Button btn_Reset = new Button(mContext);
		btn_Reset.setText(mContext.getString(R.string.set_default));
		btn_Reset.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				mSeekBar.setProgress(mDefault - 1);
				callChangeListener(mDefault - 1);
			}
		});

		layout.addView(mSeekBar, new LinearLayout.LayoutParams(
				LinearLayout.LayoutParams.MATCH_PARENT,
				LinearLayout.LayoutParams.WRAP_CONTENT));
		layout.addView(btn_Reset);

		if (shouldPersist())
			mValue = getPersistedInt(mDefault);
		mValue--;
		initialValue = mValue;

		mSeekBar.setMax(mMax);
		mSeekBar.setProgress(mValue);
		return layout;
	}

	@Override
	protected void onBindDialogView(View v) {
		super.onBindDialogView(v);
		mSeekBar.setMax(mMax);
		mSeekBar.setProgress(mValue);
	}

	@Override
	protected void onSetInitialValue(boolean restore, Object defaultValue) {
		super.onSetInitialValue(restore, defaultValue);
		if (restore)
			mValue = shouldPersist() ? getPersistedInt(mDefault) : 0;
		else
			mValue = (Integer) defaultValue;
	}

	public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
		value++;
		
		String t = TimeUtils.getDayOfMonthFrom1AsStringWithNoSuffix(value);
		mSeekBar.setContentDescription(t);
		mValueText.setText( mPrefix == null ? t: mPrefix.concat(t));
		if (shouldPersist())
			persistInt(value);
		callChangeListener(value);
	}

	public void onStartTrackingTouch(SeekBar seek) {
	}

	public void onStopTrackingTouch(SeekBar seek) {
	}

	public void setMax(int max) {
		mMax = max;
	}

	public int getMax() {
		return mMax;
	}

	public void setProgress(int progress) {
		mValue = progress;
		if (mSeekBar != null)
			mSeekBar.setProgress(progress);
	}

	public int getProgress() {
		return mValue;
	}
}