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fix(android): parsing base64 (#44)
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@osamaqarem
osamaqarem authored Dec 11, 2021
1 parent a71d248 commit 8cabe47
Showing 1 changed file with 117 additions and 120 deletions.
237 changes: 117 additions & 120 deletions android/src/main/java/com/reactnativeimagecolors/ImageColorsModule.java
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Original file line number Diff line number Diff line change
Expand Up @@ -27,20 +27,20 @@
import java.util.concurrent.TimeUnit;

public class ImageColorsModule extends ReactContextBaseJavaModule {
private static final String base64Scheme = "data";
private final ExecutorService executorService;
private Integer pixelSpacing;
private static final String base64Scheme = "data";
private final ExecutorService executorService;
private Integer pixelSpacing;


ImageColorsModule(ReactApplicationContext reactContext) {
super(reactContext);
executorService = new ThreadPoolExecutor(
0,
Integer.MAX_VALUE,
30L,
TimeUnit.SECONDS,
new SynchronousQueue<>()
);
super(reactContext);
executorService = new ThreadPoolExecutor(
0,
Integer.MAX_VALUE,
30L,
TimeUnit.SECONDS,
new SynchronousQueue<>()
);
}

@NonNull
Expand Down Expand Up @@ -70,7 +70,7 @@ private int calculateAverageColor(@NonNull Bitmap bitmap) {

int spacing = 5;

if(pixelSpacing != null){
if (pixelSpacing != null) {
spacing = pixelSpacing;
}

Expand All @@ -94,114 +94,111 @@ private int parseColorFromHex(String colorHex) {

@ReactMethod
public void getColors(String source, ReadableMap config, Promise promise) {
executorService.execute(() -> {
try {
String defColor = "#000000";
pixelSpacing = null;

if (config != null){
if (config.hasKey("defaultColor")) {
defColor = config.getString("defaultColor");
}
if (config.hasKey("pixelSpacing")) {
pixelSpacing = config.getInt("pixelSpacing");
}
}

int defColorInt = parseColorFromHex(defColor);

WritableMap resultMap = Arguments.createMap();
resultMap.putString("platform", "android");


Context context = getReactApplicationContext();
int resourceId = context.getResources().getIdentifier(source, "drawable", context.getPackageName());
Bitmap image = null;

if (resourceId == 0) {
// resource is not a local file
// could be a URL, base64.
URI uri = new URI(source);
String scheme = uri.getScheme();

if(scheme == null) throw new Exception("Invalid URI scheme");

if (scheme.equals(base64Scheme)) {
String[] parts = source.split(",");
String base64Uri = parts[1];
byte[] decodedString = Base64.decode(base64Uri, Base64.DEFAULT);
image = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
} else {
URLConnection urlConnection = uri.toURL().openConnection();

ReadableMap headers = config != null ? config.getMap("headers") : null;
if(headers != null){
ReadableMapKeySetIterator iterator = headers.keySetIterator();
while(iterator.hasNextKey()){
String key = iterator.nextKey();
urlConnection.setRequestProperty(key, headers.getString(key));
}
}

image = BitmapFactory.decodeStream(urlConnection.getInputStream());
}
} else {
image = BitmapFactory.decodeResource(context.getResources(), resourceId);
}

if (image == null) throw new Exception("Invalid image URI – failed to get image");

int rgbAvg = calculateAverageColor(image);
String hexAvg = getHex(rgbAvg);
resultMap.putString("average", hexAvg);

Palette.Builder builder = new Palette.Builder(image);
builder.generate(palette -> {
try {
if (palette != null) {
int rgb = palette.getDominantColor(defColorInt);
String hex = getHex(rgb);
resultMap.putString("dominant", hex);

int rgb1 = palette.getVibrantColor(defColorInt);
String hex1 = getHex(rgb1);
resultMap.putString("vibrant", hex1);

int rgb2 = palette.getDarkVibrantColor(defColorInt);
String hex2 = getHex(rgb2);
resultMap.putString("darkVibrant", hex2);

int rgb3 = palette.getLightVibrantColor(defColorInt);
String hex3 = getHex(rgb3);
resultMap.putString("lightVibrant", hex3);

int rgb4 = palette.getDarkMutedColor(defColorInt);
String hex4 = getHex(rgb4);
resultMap.putString("darkMuted", hex4);

int rgb5 = palette.getLightMutedColor(defColorInt);
String hex5 = getHex(rgb5);
resultMap.putString("lightMuted", hex5);

int rgb6 = palette.getMutedColor(defColorInt);
String hex6 = getHex(rgb6);
resultMap.putString("muted", hex6);

promise.resolve(resultMap);
} else {
throw new Exception("Palette was null");
}
} catch (Exception e) {
handleException(e, promise);
}
});

} catch (MalformedURLException e) {
handleException(new Exception("Invalid URL"), promise);
} catch (Exception e) {
handleException(e, promise);
}
});
executorService.execute(() -> {
try {
String defColor = "#000000";
pixelSpacing = null;

if (config != null) {
if (config.hasKey("defaultColor")) {
defColor = config.getString("defaultColor");
}
if (config.hasKey("pixelSpacing")) {
pixelSpacing = config.getInt("pixelSpacing");
}
}

int defColorInt = parseColorFromHex(defColor);

WritableMap resultMap = Arguments.createMap();
resultMap.putString("platform", "android");


Context context = getReactApplicationContext();
int resourceId = context.getResources().getIdentifier(source, "drawable", context.getPackageName());
Bitmap image = null;

if (resourceId == 0) {
// resource is not a local file
// could be a URL, base64.
if (source.startsWith(base64Scheme)) {
String[] parts = source.split(",");
String base64Uri = parts[1];
byte[] decodedString = Base64.decode(base64Uri, Base64.DEFAULT);
image = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
} else {
URI uri = new URI(source);
URLConnection urlConnection = uri.toURL().openConnection();

ReadableMap headers = config != null ? config.getMap("headers") : null;
if (headers != null) {
ReadableMapKeySetIterator iterator = headers.keySetIterator();
while (iterator.hasNextKey()) {
String key = iterator.nextKey();
urlConnection.setRequestProperty(key, headers.getString(key));
}
}

// download image
image = BitmapFactory.decodeStream(urlConnection.getInputStream());
}
} else {
image = BitmapFactory.decodeResource(context.getResources(), resourceId);
}

if (image == null) throw new Exception("Invalid image URI – failed to get image");

int rgbAvg = calculateAverageColor(image);
String hexAvg = getHex(rgbAvg);
resultMap.putString("average", hexAvg);

Palette.Builder builder = new Palette.Builder(image);
builder.generate(palette -> {
try {
if (palette != null) {
int rgb = palette.getDominantColor(defColorInt);
String hex = getHex(rgb);
resultMap.putString("dominant", hex);

int rgb1 = palette.getVibrantColor(defColorInt);
String hex1 = getHex(rgb1);
resultMap.putString("vibrant", hex1);

int rgb2 = palette.getDarkVibrantColor(defColorInt);
String hex2 = getHex(rgb2);
resultMap.putString("darkVibrant", hex2);

int rgb3 = palette.getLightVibrantColor(defColorInt);
String hex3 = getHex(rgb3);
resultMap.putString("lightVibrant", hex3);

int rgb4 = palette.getDarkMutedColor(defColorInt);
String hex4 = getHex(rgb4);
resultMap.putString("darkMuted", hex4);

int rgb5 = palette.getLightMutedColor(defColorInt);
String hex5 = getHex(rgb5);
resultMap.putString("lightMuted", hex5);

int rgb6 = palette.getMutedColor(defColorInt);
String hex6 = getHex(rgb6);
resultMap.putString("muted", hex6);

promise.resolve(resultMap);
} else {
throw new Exception("Palette was null");
}
} catch (Exception e) {
handleException(e, promise);
}
});

} catch (MalformedURLException e) {
handleException(new Exception("Invalid URL"), promise);
} catch (Exception e) {
handleException(e, promise);
}
});
}


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