Android Open Source - Aviary-Android-SDK Repeatable Horizontal Drawable

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Java Source Code

package com.aviary.android.feather.graphics;
//ww  w.  ja  v a2 s .c  om
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.Shader;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.View;

/**
 * Draw a bitmap repeated horizontally and scaled vertically.
 * 
 * @author alessandro
 */
public class RepeatableHorizontalDrawable extends Drawable {

  private Paint mPaint = new Paint();
  private Rect mRect = new Rect();
  private Matrix mMatrix = new Matrix();
  private Bitmap mBitmap = null;
  private Shader mShader;

  /**
   * Construct a new {@link RepeatableHorizontalDrawable} instance.
   * 
   * @param resources
   *            the current Context {@link Resources} used to extract the resource
   * @param resId
   *            the {@link BitmapDrawable} resource used to draw
   */
  public RepeatableHorizontalDrawable ( Resources resources, int resId ) {
    try {
      Bitmap bitmap = ( (BitmapDrawable) resources.getDrawable( resId ) ).getBitmap();
      init( bitmap );
    } catch ( Exception e ) {
    }

  }

  public static Drawable createFromView( View view ) {
    Drawable drawable = view.getBackground();

    if ( null != drawable ) {
      if ( drawable instanceof BitmapDrawable ) {
        Bitmap bitmap = ( (BitmapDrawable) drawable ).getBitmap();
        return new RepeatableHorizontalDrawable( bitmap );
      }
    }
    return drawable;
  }

  public RepeatableHorizontalDrawable ( Bitmap bitmap ) {
    init( bitmap );
  }

  private void init( Bitmap bitmap ) {
    mBitmap = bitmap;

    if ( mBitmap != null ) {
      mShader = new BitmapShader( mBitmap, TileMode.REPEAT, TileMode.CLAMP );
      mPaint.setShader( mShader );
    }
  }

  @Override
  public void draw( Canvas canvas ) {
    if ( null != mBitmap ) {
      copyBounds( mRect );
      canvas.drawPaint( mPaint );
    }
  }

  @Override
  protected void onBoundsChange( Rect bounds ) {
    super.onBoundsChange( bounds );
    if ( null != mBitmap ) {
      mMatrix.setScale( 1, (float) bounds.height() / mBitmap.getHeight() );
      mShader.setLocalMatrix( mMatrix );
    }
  }

  @Override
  public int getOpacity() {
    return PixelFormat.TRANSLUCENT;
  }

  @Override
  public void setAlpha( int alpha ) {
    mPaint.setAlpha( alpha );
  }

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

Java Source Code List