Android Open Source - SamyGo-Android-Remote Seek Bar Preference

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 *  Copyright (C) 2011  Tom Quist// w  ww .j  av  a2s  . c o m
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You can get the GNU General Public License at
 *  http://www.gnu.org/licenses/gpl.html
 */
package de.quist.app.samyGoRemote;

import android.content.Context;
import android.content.res.Resources;
import android.preference.DialogPreference;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;


public class SeekBarPreference extends DialogPreference {

  private static final String ANDROID_NAMESPACE = "http://schemas.android.com/apk/res/android";
  private static final String SAMYGO_NAMESPACE = "http://samyGoRemote.app.quist.de/apk/res/android";

  private static final String DIALOG_TEXT_ATTRIBUTE = "dialogText";
  private static final String VALUE_TEXT_ATTRIBUTE = "valueText";
  private static final String DEFAULT_VALUE_ATTRIBUTE = "defaultValue";
  private static final String MAX_ATTRIBUTE = "max";

  private static final int DEFAULT_VALUE = 0;
  private static final int DEFAULT_MAX = 100;

  private Context mContext;

  private SeekBar mSeekBar;
  private TextView mValueTextView;

  private CharSequence mDialogText;
  private CharSequence mValueText;
  private int mDefault;
  private int mMax;
  private int mValue = DEFAULT_VALUE;

  public SeekBarPreference(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    mContext = context;
    Resources res = context.getResources();
    mDialogText = attrs.getAttributeValue(ANDROID_NAMESPACE,DIALOG_TEXT_ATTRIBUTE);

    // Get the dialog text
    int dialogTextResource = attrs.getAttributeResourceValue(ANDROID_NAMESPACE, DIALOG_TEXT_ATTRIBUTE, -1);
    if (dialogTextResource != -1) {
      mDialogText = res.getText(dialogTextResource);
    } else {
      mDialogText = attrs.getAttributeValue(ANDROID_NAMESPACE, DIALOG_TEXT_ATTRIBUTE);
    }

    // Get the value text
    mValueText = attrs.getAttributeValue(SAMYGO_NAMESPACE, VALUE_TEXT_ATTRIBUTE);
    int valueTextResource = attrs.getAttributeResourceValue(SAMYGO_NAMESPACE, VALUE_TEXT_ATTRIBUTE, -1);
    if (valueTextResource != -1) {
      mValueText = res.getText(valueTextResource);
    } else {
      mValueText = attrs.getAttributeValue(SAMYGO_NAMESPACE, VALUE_TEXT_ATTRIBUTE);
    }

    mDefault = attrs.getAttributeIntValue(ANDROID_NAMESPACE,DEFAULT_VALUE_ATTRIBUTE, DEFAULT_VALUE);
    mMax = attrs.getAttributeIntValue(ANDROID_NAMESPACE,MAX_ATTRIBUTE, DEFAULT_MAX);

  }
  @Override 
  protected View onCreateDialogView() {
    LayoutInflater layoutInflator = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View layout = layoutInflator.inflate(R.layout.seek_bar_preference_layout, null);

    // Message text
    TextView messageTextView = (TextView) layout.findViewById(android.R.id.text1);
    if (mDialogText != null) {
      messageTextView.setText(mDialogText);
    } else {
      messageTextView.setVisibility(View.GONE);
    }

    // Value text
    mValueTextView = (TextView) layout.findViewById(android.R.id.text2);

    // Seek bar
    mSeekBar = (SeekBar) layout.findViewById(android.R.id.progress);
    mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

      public void onProgressChanged(SeekBar seekBar, int progress,
          boolean fromUser) {
        String valueString = Integer.toString(progress);
        if (mValueText == null) {
          mValueTextView.setText(valueString);
        } else {
          mValueTextView.setText(TextUtils.expandTemplate(mValueText, valueString));
        }
        mValue = progress;
        if (shouldPersist()) persistInt(progress);
        callChangeListener(progress);
      }

      public void onStartTrackingTouch(SeekBar seekBar) {
      }

      public void onStopTrackingTouch(SeekBar seekBar) {
      }
    });
    mSeekBar.setMax(mMax);
    mSeekBar.setProgress(mValue);
    if (shouldPersist()) {
      mValue = getPersistedInt(mDefault);
    }

    return layout;
  }

  @Override
  protected int getPersistedInt(int defaultReturnValue) {
    int result;
    try {
      result = super.getPersistedInt(defaultReturnValue);
    } catch (ClassCastException e) {
      String stringValue = super.getPersistedString(Integer.toString(defaultReturnValue));
      result = Integer.parseInt(stringValue);
    }
    return result;
  }

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

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

}
Java Source Code List
