private Drawable getLoadingTile() {
if (userSelectedLoadingDrawable != null) return userSelectedLoadingDrawable;
if (mLoadingTile == null && mLoadingBackgroundColor != Color.TRANSPARENT) {
try {
final int tileSize =
mTileProvider.getTileSource() != null
? mTileProvider.getTileSource().getTileSizePixels()
: 256;
final Bitmap bitmap = Bitmap.createBitmap(tileSize, tileSize, Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
final Paint paint = new Paint();
canvas.drawColor(mLoadingBackgroundColor);
paint.setColor(mLoadingLineColor);
paint.setStrokeWidth(0);
final int lineSize = tileSize / 16;
for (int a = 0; a < tileSize; a += lineSize) {
canvas.drawLine(0, a, tileSize, a, paint);
canvas.drawLine(a, 0, a, tileSize, paint);
}
mLoadingTile = new BitmapDrawable(bitmap);
} catch (final OutOfMemoryError e) {
Log.e(IMapView.LOGTAG, "OutOfMemoryError getting loading tile");
System.gc();
} catch (final NullPointerException e) {
Log.e(IMapView.LOGTAG, "NullPointerException getting loading tile");
System.gc();
}
}
return mLoadingTile;
}
@Override
public void initialiseLoop(final int pZoomLevel, final int pTileSizePx) {
// make sure the cache is big enough for all the tiles
final int numNeeded =
(mLowerRight.y - mUpperLeft.y + 1) * (mLowerRight.x - mUpperLeft.x + 1);
mTileProvider.ensureCapacity(numNeeded + mOvershootTileCache);
}
@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);
}
}
/**
* Set whether to use the network connection if it's available.
*
* @param aMode if true use the network connection if it's available. if false don't use the
* network connection even if it's available.
*/
public void setUseDataConnection(final boolean aMode) {
mTileProvider.setUseDataConnection(aMode);
}
/** Whether to use the network connection if it's available. */
public boolean useDataConnection() {
return mTileProvider.useDataConnection();
}
public int getMaximumZoomLevel() {
return mTileProvider.getMaximumZoomLevel();
}