Android Open Source - simple_color_chooser_demo Color Box View

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License

The source code is released under:

MIT License

Java Source Code

package com.fumobox.demo;
/*w w  w  .  j a v a 2  s . co m*/
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.RectF;
import android.graphics.Paint.Style;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class ColorBoxView extends SurfaceView implements SurfaceHolder.Callback {

  private SurfaceHolder _sh;
  
  public static final int PADDING_DEFAULT = 4;
  private int _padding = PADDING_DEFAULT;

  public static final int COLOR_DEFAULT = 0xffffffff;
  private int _color = COLOR_DEFAULT;  
  
  public ColorBoxView(Context context) {
    super(context);
    init();
  }

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

  public ColorBoxView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }
  
  private void init() {
    _sh = getHolder();
    _sh.addCallback(this);
    _sh.setFormat(PixelFormat.TRANSLUCENT);
    
    setFocusable(true);
    setZOrderOnTop(true);
  }
  
  @Override
  public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
  }

  @Override
  public void surfaceCreated(SurfaceHolder arg0) {
    draw();
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder arg0) {
  }
  
  public void draw() {
    Canvas canvas = _sh.lockCanvas();
    if(canvas == null) {
      return;
    }
    
    float w = this.getWidth();
    float h = this.getHeight();
    float bw = w - _padding * 2f;
    float bh = h - _padding * 2f;
    RectF rect = new RectF(_padding, _padding, _padding + bw, _padding + bh);
    
    Paint p = new Paint();
    p.setAntiAlias(true);
    
    canvas.drawColor(Color.TRANSPARENT, android.graphics.PorterDuff.Mode.CLEAR);

    p.setStyle(Style.FILL);
    p.setColor(_color);
    canvas.drawRoundRect(rect, 4, 4, p);

    p.setStyle(Style.STROKE);
    p.setStrokeWidth(2);
    p.setColor(0xff666666);
    canvas.drawRoundRect(rect, 4, 4, p);
    
    _sh.unlockCanvasAndPost(canvas);
  }
  
  @Override
  public boolean onTouchEvent(MotionEvent e) {
    return true;
  }
  
  public int getColor() {
    return _color;
  }
  
  public void setColor(int color) {
    _color = color | 0xff000000;
    draw();
  }
  
}

Java Source Code List

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