/**
   * Converts TMS tile coordinates to QuadTree
   *
   * @param aTile The tile coordinates to convert
   * @return The QuadTree as String.
   */
  protected String quadTree(final MapTile aTile) {
    final StringBuilder quadKey = new StringBuilder();
    for (int i = aTile.getZoomLevel(); i > 0; i--) {
      int digit = 0;
      final int mask = 1 << (i - 1);
      if ((aTile.getX() & mask) != 0) digit += 1;
      if ((aTile.getY() & mask) != 0) digit += 2;
      quadKey.append("" + digit);
    }

    return quadKey.toString();
  }
  public byte[] getImage(final ITileSource pTileSource, final MapTile pTile) {

    try {
      byte[] bits = null;
      final String[] tile = {COLUMN_TILE};
      final long x = (long) pTile.getX();
      final long y = (long) pTile.getY();
      final long z = (long) pTile.getZoomLevel();
      final long index = ((z << z) + x << z) + y;
      final Cursor cur =
          mDatabase.query(
              TABLE,
              tile,
              COLUMN_KEY
                  + " = "
                  + index
                  + " and "
                  + COLUMN_PROVIDER
                  + " = '"
                  + pTileSource.name()
                  + "'",
              null,
              null,
              null,
              null);

      if (cur.getCount() != 0) {
        cur.moveToFirst();
        bits = (cur.getBlob(0));
      }
      cur.close();
      if (bits != null) {
        return bits;
      }
    } catch (final Throwable e) {
      Log.w(IMapView.LOGTAG, "Error getting db stream: " + pTile, e);
    }

    return null;
  }
Beispiel #3
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        @Override
        public void handleTile(
            final Canvas pCanvas,
            final int pTileSizePx,
            final MapTile pTile,
            final int pX,
            final int pY) {
          // no overflow detected here Log.d(IMapView.LOGTAG, "handleTile " + pTile.toString() +
          // ","+pX + "," + pY);
          Drawable currentMapTile = mTileProvider.getMapTile(pTile);
          boolean isReusable = currentMapTile instanceof ReusableBitmapDrawable;
          final ReusableBitmapDrawable reusableBitmapDrawable =
              isReusable ? (ReusableBitmapDrawable) currentMapTile : null;
          if (currentMapTile == null) {
            currentMapTile = getLoadingTile();
          }

          if (currentMapTile != null) {
            mTilePoint.set(pX * pTileSizePx, pY * pTileSizePx);
            mTileRect.set(
                mTilePoint.x, mTilePoint.y, mTilePoint.x + pTileSizePx, mTilePoint.y + pTileSizePx);
            if (isReusable) {
              reusableBitmapDrawable.beginUsingDrawable();
            }
            try {
              if (isReusable && !((ReusableBitmapDrawable) currentMapTile).isBitmapValid()) {
                currentMapTile = getLoadingTile();
                isReusable = false;
              }
              onTileReadyToDraw(pCanvas, currentMapTile, mTileRect);
            } finally {
              if (isReusable) reusableBitmapDrawable.finishUsingDrawable();
            }
          }

          if (DEBUGMODE) {
            mTileRect.set(
                pX * pTileSizePx,
                pY * pTileSizePx,
                pX * pTileSizePx + pTileSizePx,
                pY * pTileSizePx + pTileSizePx);
            pCanvas.drawText(
                pTile.toString(),
                mTileRect.left + 1,
                mTileRect.top + mDebugPaint.getTextSize(),
                mDebugPaint);
            pCanvas.drawLine(
                mTileRect.left, mTileRect.top, mTileRect.right, mTileRect.top, mDebugPaint);
            pCanvas.drawLine(
                mTileRect.left, mTileRect.top, mTileRect.left, mTileRect.bottom, mDebugPaint);
          }
        }