Android Open Source - vanilindy Seek Bar Preference

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2012 Christopher Eby <kreed@kreed.org>
 *//from  w w w  . j a  v a2  s  .c  o m
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package ch.blinkenlights.android.vanilla;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;

/**
 * SeekBar preference to set the shake force threshold.
 */
public class SeekBarPreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener {
  /**
   * The current value.
   */
  private int mValue;
  
  /**
   * Our context (needed for getResources())
   */
  private Context mContext;
  
  /**
   * TextView to display current threshold.
   */
  private TextView mValueText;

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

  @Override
  public CharSequence getSummary()
  {
    return getSummary(mValue);
  }

  @Override
  protected Object onGetDefaultValue(TypedArray a, int index)
  {
    return a.getInt(index, 100);
  }

  @Override
  protected void onSetInitialValue(boolean restoreValue, Object defaultValue)
  {
    mValue = restoreValue ? getPersistedInt(mValue) : (Integer)defaultValue;
    }

  /**
   * Create the summary for the given value.
   *
   * @param value The force threshold.
   * @return A string representation of the threshold.
   */
  private String getSummary(int value)
  {
    if ("shake_threshold".equals(getKey())) {
      return String.valueOf(value / 10.0f);
    } else if("replaygain_bump".equals(getKey())) {
      return String.format("%+.1fdB", 2*(value-75)/10f);
    } else if("replaygain_untagged_debump".equals(getKey())) {
      String summary = (String)mContext.getResources().getText(R.string.replaygain_untagged_debump_summary);
      return String.format("%s %.1fdB", summary, (value-150)/10f);
    } else {
      return String.format("%d%% (%+.1fdB)", value, 20 * Math.log10(Math.pow(value / 100.0, 3)));
    }
  }

  @Override
  protected View onCreateDialogView()
  {
    View view = super.onCreateDialogView();

    mValueText = (TextView)view.findViewById(R.id.value);
    mValueText.setText(getSummary(mValue));

    SeekBar seekBar = (SeekBar)view.findViewById(R.id.seek_bar);
    seekBar.setMax(150);
    seekBar.setProgress(mValue);
    seekBar.setOnSeekBarChangeListener(this);

    return view;
  }

  @Override
  protected void onDialogClosed(boolean positiveResult)
  {
    notifyChanged();
  }

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
  {
    if (fromUser) {
      mValue = progress;
      mValueText.setText(getSummary(progress));
      persistInt(progress);
    }
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar)
  {
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar)
  {
  }
}

Java Source Code List

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