Android Open Source - hellomap3d-android My Merged Raster Tile Data Source

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License

The source code is released under:

MIT License

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Java Source Code

package com.nutiteq.advancedmap3.datasource;
/*w  w w . j a v a  2 s.  co m*/
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;

import com.nutiteq.core.MapTile;
import com.nutiteq.datasources.TileDataSource;
import com.nutiteq.core.TileData;
import com.nutiteq.utils.BitmapUtils;

public class MyMergedRasterTileDataSource extends TileDataSource {
  private TileDataSource dataSource1;
    private TileDataSource dataSource2;
    private Paint paint;

  public MyMergedRasterTileDataSource(TileDataSource dataSource1, TileDataSource dataSource2) {
    super(dataSource1.getMinZoom(), dataSource1.getMaxZoom());
      this.dataSource1 = dataSource1;
      this.dataSource2 = dataSource2;
  }

  public TileData loadTile(MapTile tile) {
    TileData tileData1 = dataSource1.loadTile(tile);
      TileData tileData2 = dataSource2.loadTile(tile);
      
      if (tileData1 == null) {
          return tileData2;
      }
      
      if (tileData2 == null) {
          return tileData1;
      }
      
      // Combine the bitmaps
      com.nutiteq.graphics.Bitmap tileBitmap1 = new com.nutiteq.graphics.Bitmap(tileData1.getData(), false);
      com.nutiteq.graphics.Bitmap tileBitmap2 = new com.nutiteq.graphics.Bitmap(tileData2.getData(), false);
      Bitmap bitmap1 = BitmapUtils.CreateAndroidBitmapFromBitmap(tileBitmap1);
      Bitmap bitmap2 = BitmapUtils.CreateAndroidBitmapFromBitmap(tileBitmap2);
      
      if (paint == null) {
        paint = new Paint(Paint.FILTER_BITMAP_FLAG);
      }
      
      Canvas canvas = new Canvas(bitmap1);
      canvas.drawBitmap(bitmap2, null, new Rect(0, 0, bitmap1.getWidth(), bitmap1.getHeight()), paint);
      
      return new TileData(BitmapUtils.CreateBitmapFromAndroidBitmap(bitmap1).compressToInternal());
  }
  
}

Java Source Code List