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package com.mapbox.mapboxsdk.annotations;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.util.DisplayMetrics;
import android.view.WindowManager;
import com.mapbox.mapboxsdk.R;
import com.mapbox.mapboxsdk.exceptions.TooManyIconsException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* Factory for creating Icons from bitmap images.
* <p>
* {@link Icon} is used to display bitmaps on top of the map using {@link Marker} and {@link MarkerView}.
* </p>
*
* @see Icon
*/
public final class IconFactory {
private static final String ICON_ID_PREFIX = "com.mapbox.icons.icon_";
public static final Bitmap ICON_MARKERVIEW_BITMAP = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
public static final String ICON_MARKERVIEW_ID = ICON_ID_PREFIX + "marker_view";
private Context context;
private static IconFactory instance;
private Icon defaultMarker;
private Icon defaultMarkerView;
private BitmapFactory.Options options;
private int nextId = 0;
public static synchronized IconFactory getInstance(@NonNull Context context) {
if (instance == null) {
instance = new IconFactory(context.getApplicationContext());
}
return instance;
}
private IconFactory(@NonNull Context context) {
this.context = context;
DisplayMetrics realMetrics = null;
DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
realMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getRealMetrics(realMetrics);
}
wm.getDefaultDisplay().getMetrics(metrics);
options = new BitmapFactory.Options();
options.inScaled = true;
options.inDensity = DisplayMetrics.DENSITY_DEFAULT;
options.inTargetDensity = metrics.densityDpi;
if (realMetrics != null) {
options.inScreenDensity = realMetrics.densityDpi;
}
}
/**
* Creates an {@link Icon} from a given Bitmap image.
*
* @param bitmap image used for creating the Icon.
* @return The {@link Icon} using the given Bitmap image.
*/
public Icon fromBitmap(@NonNull Bitmap bitmap) {
if (nextId < 0) {
throw new TooManyIconsException();
}
String id = ICON_ID_PREFIX + ++nextId;
return new Icon(id, bitmap);
}
/**
* Create an {@link Icon} using the resource ID of a Bitmap image.
*
* @param resourceId The resource ID of a Bitmap image.
* @return The {@link Icon} that was loaded from the asset or {@code null} if failed to load.
*/
public Icon fromResource(@DrawableRes int resourceId) {
Drawable drawable = ContextCompat.getDrawable(context, resourceId);
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
return fromBitmap(bitmapDrawable.getBitmap());
} else {
throw new IllegalArgumentException("Failed to decode image. The resource provided must be a Bitmap.");
}
}
/**
* Provides an {@link Icon} using the default marker icon used for {@link Marker}.
*
* @return An {@link Icon} with the default {@link Marker} icon.
*/
public Icon defaultMarker() {
if (defaultMarker == null) {
defaultMarker = fromResource(R.drawable.mapbox_marker_icon_default);
}
return defaultMarker;
}
/**
* Provides an {@link Icon} using the default marker icon used for {@link MarkerView}.
*
* @return An {@link Icon} with the default {@link MarkerView} icon.
*/
public Icon defaultMarkerView() {
if (defaultMarkerView == null) {
defaultMarkerView = fromResource(R.drawable.mapbox_markerview_icon_default);
}
return defaultMarkerView;
}
private Icon fromInputStream(@NonNull InputStream is) {
Bitmap bitmap = BitmapFactory.decodeStream(is, null, options);
return fromBitmap(bitmap);
}
/**
* Creates an {@link Icon} using the name of a Bitmap image in the assets directory.
*
* @param assetName The name of a Bitmap image in the assets directory.
* @return The {@link Icon} that was loaded from the asset or {@code null} if failed to load.
*/
public Icon fromAsset(@NonNull String assetName) {
InputStream is;
try {
is = context.getAssets().open(assetName);
} catch (IOException ioException) {
return null;
}
return fromInputStream(is);
}
/**
* Creates an {@link Icon} using the absolute file path of a Bitmap image.
*
* @param absolutePath The absolute path of the Bitmap image.
* @return The {@link Icon} that was loaded from the absolute path or {@code null} if failed to
* load.
*/
public Icon fromPath(@NonNull String absolutePath) {
Bitmap bitmap = BitmapFactory.decodeFile(absolutePath, options);
return fromBitmap(bitmap);
}
/**
* Create an {@link Icon} using the name of a Bitmap image file located in the internal storage.
* In particular, this calls {@link Context#openFileInput(String)}.
*
* @param fileName The name of the Bitmap image file.
* @return The {@link Icon} that was loaded from the asset or {@code null} if failed to load.
* @see <a href="https://developer.android.com/guide/topics/data/data-storage.html#filesInternal">
* Using the Internal Storage</a>
*/
public Icon fromFile(@NonNull String fileName) {
FileInputStream is;
try {
is = context.openFileInput(fileName);
} catch (FileNotFoundException fileNotFoundException) {
return null;
}
return fromInputStream(is);
}
/**
* Create an {@link Icon} using a previously created icon identifier along with a provided
* Bitmap.
*
* @param iconId The {@link Icon} identifier you'd like to recreate.
* @param bitmap a Bitmap used to replace the current one.
* @return The {@link Icon} using the new Bitmap.
*/
public static Icon recreate(@NonNull String iconId, @NonNull Bitmap bitmap) {
return new Icon(iconId, bitmap);
}
}
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