Android Open Source - material-design-icons-for-android Material Drawable

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License

The source code is released under:

Apache License

Java Source Code

/* 
 * Copyright Vin Wong @ vinexs.com//from w w w  .  j  av a2 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 com.vinexs.mdicon;

import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.TextPaint;
import android.util.DisplayMetrics;
import android.util.Log;

public class MaterialDrawable extends Drawable {

    private final Context context;

    protected TextPaint paint;

    protected int theme = -1;
    protected int color = Color.BLACK;
    protected int size = -1;
    protected int alpha = 255;
    
    protected String iconUnicode = "";

    public MaterialDrawable(Context context, String iconUnicode) {
        this.context = context;
        this.iconUnicode = iconUnicode;
        setProperties();
    }
    
    public MaterialDrawable(Context context, String iconUnicode, int color) {
        this.context = context;
        this.iconUnicode = iconUnicode;
        this.color = color;
        this.theme = 255;
        setProperties();
  }

  public MaterialDrawable(Context context, String iconUnicode, int theme, int color, int alpha) {
        this.context = context;
        this.iconUnicode = iconUnicode;
        this.theme = theme;
        this.color = color;
        this.alpha = alpha;
        setProperties();
  }

    public MaterialDrawable setMenuItemSize() {
      DisplayMetrics dm = context.getResources().getDisplayMetrics();
      this.size = (int) ( 24 * dm.density );
      setBounds(0, 0, size, size);
        invalidateSelf();
        return this;
    }
    
    public void setProperties(){
      paint = new TextPaint();
      if (theme < 0) {
          getThemeIconColor();
        }
      try {
        paint.setTypeface(MaterialIcon.getTypeface(context));
      } catch (Exception e) {
       e.printStackTrace();
     }
      paint.setStyle(Paint.Style.STROKE);
      paint.setTextAlign(Paint.Align.CENTER);
      paint.setUnderlineText(false);
      paint.setColor(color);
      paint.setAlpha(alpha);
      paint.setAntiAlias(true);
    }
    
    public void getThemeIconColor() {
      int color = 0x000000;
      Resources.Theme theme = context.getTheme();
      if (theme != null) {
        TypedArray backgroundAttributes = theme.obtainStyledAttributes(new int[]{android.R.attr.colorBackground});
      if (backgroundAttributes != null) {
        color = backgroundAttributes.getColor(0, 0x000000);
        backgroundAttributes.recycle();
      }
      }
      Log.d( "Detect Theme", "Theme Color: "+ String.format("#%06X", (0xFFFFFF & color)) );
      // Convert color to greyscale, check if < 128
      if (color != 0xFFFFFF && 0.21 * Color.red(color) + 0.72 * Color.green(color) + 0.07 * Color.blue(color) < 128) {
      this.color = Color.parseColor("#FFFFFF");      
      this.alpha = (int) (255 * 0.8);
    } else {
      this.color = Color.parseColor("#333333");    
      this.alpha = (int) (255 * 0.6);
    }
    }    

    @Override
    public void draw(Canvas canvas) {
        paint.setTextSize(getBounds().height());
        Rect textBounds = new Rect();
        paint.getTextBounds(iconUnicode, 0, 1, textBounds);
        float textBottom = (getBounds().height() - textBounds.height()) / 2f + textBounds.height() - textBounds.bottom;
        canvas.drawText(iconUnicode, getBounds().width() / 2f, textBottom, paint);
    }

    @Override
    public void clearColorFilter() {
        paint.setColorFilter(null);
    }    
    
  /** ActionBar icon display wrong without this. */
  @Override
  public int getIntrinsicHeight() {
      return size;
  }
  
  /** ActionBar icon display wrong without this. */
  @Override
  public int getIntrinsicWidth() {
      return size;
  }

    @Override
    public int getOpacity() {
        return this.alpha;
    }

    @Override
    public void setAlpha(int alpha) {
        this.alpha = alpha;
        paint.setAlpha(alpha);
    }

    @Override
    public void setColorFilter(ColorFilter cf) {
        paint.setColorFilter(cf);
    }
    
}

Java Source Code List

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