Android Open Source - InfoWallpaper Background

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Back to project page InfoWallpaper.
License

The source code is released under:
MIT License
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Java Source Code

package com.andreashedin.infowallpaper;
/*from  ww w .j  a va 2  s.  c  o m*/
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.Rect;

public class Background {

  private Bitmap mImage = null;
  private ColorHandler mColor = null;
  private Paint mPaint = new Paint();
  private float mOffset = 0.0f;
  
  public Background() {
    
  }
  
  public boolean hasDifferentScreens() {
    return false;
  }
  
  public void setColor(int color) {
    if(mColor == null) {
      mColor = new ColorHandler(color);
    }
    else
      mColor.setColor(color);
  }
  
  public void setColor(int colorTop, int colorBottom) {
    if(mColor == null) {
      mColor = new ColorHandler(colorTop, colorBottom);
    }
    else {
      mColor.setColor(colorTop, colorBottom);
    }
  }
  
  public boolean setOffset(float offsetX) {
    mOffset = offsetX;
    
    if(imgExtraWidth > 0.0f)
      return true;
    
    return false;
  }
  
  public void clearColor() {
    mColor = null;
    mPaint.setColor(0xffffffff);
    mPaint.setShader(null);
  }
  
  private String mCurrentFile = "";
  public boolean setImage(String file) throws Exception {
    if(file.equals(mCurrentFile) == false)
      clearImage();
    else
      return true;
    
    if(file.equals("") == false) {
      //Options options = new Options();
      //options.inDensity = Phone.instance().screen().getDensity();
      
      try {
        mImage = BitmapFactory.decodeFile(file);
      }
      catch(Exception ex) {
        try {
          Options options = new Options();
          options.inSampleSize = 2;
          System.gc();
          mImage = BitmapFactory.decodeFile(file, options);
        }
        catch(Exception ex2) {
          mImage = null;
          throw ex2;
        }
      }
    }
    
    if(mImage != null) {
      mNewImage = true;
      mCurrentFile = file;
    }
    
    return (mImage != null);
  }
  
  public void clearImage() {
    if(mImage != null)
      mImage.recycle();
    mImage = null;
  }

  private int imgExtraWidth = 0;
  public void decideImageScaling() {
    if(mImage != null) {
      int screenHeight =Phone.instance().screen().getHeight();
      int screenWidth = Phone.instance().screen().getWidth();
      int imgHeight = mImage.getHeight();
      int imgWidth = mImage.getWidth();
      
      int newImgWidth = (int)(((float)imgWidth / (float)imgHeight) * screenHeight);
      if(newImgWidth < screenWidth)
        newImgWidth = screenWidth;
      
      mImage = Bitmap.createScaledBitmap(mImage, newImgWidth, screenHeight, true);
      
      imgExtraWidth = newImgWidth - screenWidth;
    }
  }
  
  private boolean mNewImage = false;
  public void draw(Canvas canvas) { 
    canvas.drawColor(0xff000000, PorterDuff.Mode.CLEAR);
    
    if(mImage != null) {
      if(mNewImage == true) {
        decideImageScaling();
        mNewImage = false;
      }
      mPaint.setColor(0xffffffff);
      mPaint.setFilterBitmap(true);
      mPaint.setDither(true);
      canvas.drawBitmap(mImage, -(imgExtraWidth * mOffset), 0.0f, mPaint);
    }
    
    mPaint = mColor.getPaint(mPaint);
    canvas.drawRect(0, 0, Phone.instance().screen().getWidth(), Phone.instance().screen().getHeight(), mPaint);
  }
  
  public void update() {
    mColor.update();
  }
}
Java Source Code List
