Android Open Source - hacker-live-wallpaper Color Picker Preference

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License

The source code is released under:

Copyright (C) 2013 Gulshan Singh 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 Soft...

Java Source Code

/*
 * Copyright (C) 2011 Sergey Margaritov// w w  w  .  j  a  va 2 s .  c o  m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.margaritov.preference.colorpicker;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

/**
 * A preference type that allows a user to choose a time
 * @author Sergey Margaritov
 */
public class ColorPickerPreference
  extends
    Preference
  implements
    Preference.OnPreferenceClickListener,
    ColorPickerDialog.OnColorChangedListener {

  View mView;
  ColorPickerDialog mDialog;
  private int mValue = Color.BLACK;
  private float mDensity = 0;
  private boolean mAlphaSliderEnabled = false;
  private boolean mHexValueEnabled = false;

  public ColorPickerPreference(Context context) {
    super(context);
    init(context, null);
  }

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

  public ColorPickerPreference(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init(context, attrs);
  }

  @Override
  protected Object onGetDefaultValue(TypedArray a, int index) {
    return a.getColor(index, Color.BLACK);
  }

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

  private void init(Context context, AttributeSet attrs) {
    mDensity = getContext().getResources().getDisplayMetrics().density;
    setOnPreferenceClickListener(this);
    if (attrs != null) {
      mAlphaSliderEnabled = attrs.getAttributeBooleanValue(null, "alphaSlider", false);
      mHexValueEnabled = attrs.getAttributeBooleanValue(null, "hexValue", false);
    }
  }

  @Override
  protected void onBindView(View view) {
    super.onBindView(view);
    mView = view;
    setPreviewColor();
  }

  private void setPreviewColor() {
    if (mView == null) return;
    ImageView iView = new ImageView(getContext());
    LinearLayout widgetFrameView = ((LinearLayout)mView.findViewById(android.R.id.widget_frame));
    if (widgetFrameView == null) return;
    widgetFrameView.setVisibility(View.VISIBLE);
    widgetFrameView.setPadding(
      widgetFrameView.getPaddingLeft(),
      widgetFrameView.getPaddingTop(),
      (int)(mDensity * 8),
      widgetFrameView.getPaddingBottom()
    );
    // remove already create preview image
    int count = widgetFrameView.getChildCount();
    if (count > 0) {
      widgetFrameView.removeViews(0, count);
    }
    widgetFrameView.addView(iView);
    widgetFrameView.setMinimumWidth(0);
    iView.setBackgroundDrawable(new AlphaPatternDrawable((int)(5 * mDensity)));
    iView.setImageBitmap(getPreviewBitmap());
  }

  private Bitmap getPreviewBitmap() {
    int d = (int) (mDensity * 31); //30dip
    int color = mValue;
    Bitmap bm = Bitmap.createBitmap(d, d, Config.ARGB_8888);
    int w = bm.getWidth();
    int h = bm.getHeight();
    int c = color;
    for (int i = 0; i < w; i++) {
      for (int j = i; j < h; j++) {
        c = (i <= 1 || j <= 1 || i >= w-2 || j >= h-2) ? Color.GRAY : color;
        bm.setPixel(i, j, c);
        if (i != j) {
          bm.setPixel(j, i, c);
        }
      }
    }

    return bm;
  }

  @Override
  public void onColorChanged(int color) {
    if (isPersistent()) {
      persistInt(color);
    }
    mValue = color;
    setPreviewColor();
    try {
      getOnPreferenceChangeListener().onPreferenceChange(this, color);
    } catch (NullPointerException e) {

    }
  }

  public boolean onPreferenceClick(Preference preference) {
    showDialog(null);
    return false;
  }
  
  protected void showDialog(Bundle state) {
    mDialog = new ColorPickerDialog(getContext(), mValue);
    mDialog.setOnColorChangedListener(this);
    if (mAlphaSliderEnabled) {
      mDialog.setAlphaSliderVisible(true);
    }
    if (mHexValueEnabled) {
      mDialog.setHexValueEnabled(true);
    }
    if (state != null) {
      mDialog.onRestoreInstanceState(state);
    }
    mDialog.show();
  }

  /**
   * Toggle Alpha Slider visibility (by default it's disabled)
   * @param enable
   */
  public void setAlphaSliderEnabled(boolean enable) {
    mAlphaSliderEnabled = enable;
  }

  /**
   * Toggle Hex Value visibility (by default it's disabled)
   * @param enable
   */
  public void setHexValueEnabled(boolean enable) {
    mHexValueEnabled = enable;
  }

  /**
   * For custom purposes. Not used by ColorPickerPreferrence
   * @param color
   * @author Unknown
   */
    public static String convertToARGB(int color) {
        String alpha = Integer.toHexString(Color.alpha(color));
        String red = Integer.toHexString(Color.red(color));
        String green = Integer.toHexString(Color.green(color));
        String blue = Integer.toHexString(Color.blue(color));

        if (alpha.length() == 1) {
            alpha = "0" + alpha;
        }

        if (red.length() == 1) {
            red = "0" + red;
        }

        if (green.length() == 1) {
            green = "0" + green;
        }

        if (blue.length() == 1) {
            blue = "0" + blue;
        }

        return "#" + alpha + red + green + blue;
    }
    
    /**
   * For custom purposes. Not used by ColorPickerPreference
   * @param color
   * @author Charles Rosaaen
   * @return A string representing the hex value of color,
   * without the alpha value
   */
    public static String convertToRGB(int color) {
        String red = Integer.toHexString(Color.red(color));
        String green = Integer.toHexString(Color.green(color));
        String blue = Integer.toHexString(Color.blue(color));

        if (red.length() == 1) {
            red = "0" + red;
        }

        if (green.length() == 1) {
            green = "0" + green;
        }

        if (blue.length() == 1) {
            blue = "0" + blue;
        }

        return "#" + red + green + blue;
    }

    /**
     * For custom purposes. Not used by ColorPickerPreferrence
     * @param argb
     * @throws NumberFormatException
     * @author Unknown
     */
  public static int convertToColorInt(String argb) throws IllegalArgumentException {

    if (!argb.startsWith("#")) {
      argb = "#" + argb;
    }

    return Color.parseColor(argb);
  }
    
    @Override
    protected Parcelable onSaveInstanceState() {
        final Parcelable superState = super.onSaveInstanceState();
        if (mDialog == null || !mDialog.isShowing()) {
            return superState;
        }

        final SavedState myState = new SavedState(superState);
        myState.dialogBundle = mDialog.onSaveInstanceState();
        return myState;
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        if (state == null || !(state instanceof SavedState)) {
            // Didn't save state for us in onSaveInstanceState
            super.onRestoreInstanceState(state);
            return;
        }

        SavedState myState = (SavedState) state;
        super.onRestoreInstanceState(myState.getSuperState());
        showDialog(myState.dialogBundle);
    }

    private static class SavedState extends BaseSavedState {
        Bundle dialogBundle;
        
        public SavedState(Parcel source) {
            super(source);
            dialogBundle = source.readBundle();
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
            super.writeToParcel(dest, flags);
            dest.writeBundle(dialogBundle);
        }

        public SavedState(Parcelable superState) {
            super(superState);
        }
        
        @SuppressWarnings("unused")
        public static final Parcelable.Creator<SavedState> CREATOR =
                new Parcelable.Creator<SavedState>() {
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }

            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }
}

Java Source Code List

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