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Android: Fix Image.getSize to be memory friendly #15887

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Android: Fix Image.getSize to be memory friendly #15887

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99 changes: 61 additions & 38 deletions ReactAndroid/src/main/java/com/facebook/react/modules/image/ImageLoaderModule.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,32 +9,40 @@

package com.facebook.react.modules.image;

import javax.annotation.Nullable;

import android.content.Context;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Pair;
import android.util.SparseArray;

import com.facebook.common.executors.CallerThreadExecutor;
import com.facebook.common.references.CloseableReference;
import com.facebook.common.util.UriUtil;
import com.facebook.datasource.BaseDataSubscriber;
import com.facebook.datasource.DataSource;
import com.facebook.datasource.DataSubscriber;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.imagepipeline.core.ImagePipeline;
import com.facebook.imagepipeline.image.CloseableImage;
import com.facebook.imagepipeline.request.ImageRequest;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
import com.facebook.imageutils.BitmapUtil;
import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.GuardedAsyncTask;
import com.facebook.react.bridge.LifecycleEventListener;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.bridge.ReadableArray;
import com.facebook.react.bridge.WritableMap;
import com.facebook.react.module.annotations.ReactModule;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.annotation.Nullable;

@ReactModule(name = "ImageLoader")
public class ImageLoaderModule extends ReactContextBaseJavaModule implements
LifecycleEventListener {
Expand Down Expand Up @@ -79,45 +87,60 @@ public void getSize(
}

Uri uri = Uri.parse(uriString);
ImageRequest request = ImageRequestBuilder.newBuilderWithSource(uri).build();

DataSource<CloseableReference<CloseableImage>> dataSource =
Fresco.getImagePipeline().fetchDecodedImage(request, mCallerContext);
new DecodeDimensionsTask(getReactApplicationContext(), uri, promise)
.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}

private static class DecodeDimensionsTask extends GuardedAsyncTask<Void, Void> {

DataSubscriber<CloseableReference<CloseableImage>> dataSubscriber =
new BaseDataSubscriber<CloseableReference<CloseableImage>>() {
@Override
protected void onNewResultImpl(
DataSource<CloseableReference<CloseableImage>> dataSource) {
if (!dataSource.isFinished()) {
return;
}
CloseableReference<CloseableImage> ref = dataSource.getResult();
if (ref != null) {
try {
CloseableImage image = ref.get();

WritableMap sizes = Arguments.createMap();
sizes.putInt("width", image.getWidth());
sizes.putInt("height", image.getHeight());

promise.resolve(sizes);
} catch (Exception e) {
promise.reject(ERROR_GET_SIZE_FAILURE, e);
} finally {
CloseableReference.closeSafely(ref);
}
} else {
promise.reject(ERROR_GET_SIZE_FAILURE);
private final Context mContext;
private final Uri mUri;
private final Promise mPromise;

private DecodeDimensionsTask(ReactContext reactContext, Uri uri, Promise promise) {
super(reactContext);
mContext = reactContext;
mUri = uri;
mPromise = promise;
}

@Override
protected void doInBackgroundGuarded(Void... params) {
InputStream inputStream = null;
try {
if (UriUtil.isLocalFileUri(mUri) || UriUtil.isLocalContentUri(mUri)) {
inputStream = mContext.getContentResolver().openInputStream(mUri);
} else if (UriUtil.isNetworkUri(mUri)) {
inputStream = new URL(mUri.toString()).openStream();
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@foghina foghina Oct 23, 2017

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This is not nice. This is bypassing Fresco's network layer (e.g. OkHttp).

} else if (UriUtil.isLocalAssetUri(mUri)) {
inputStream = mContext.getAssets().open(mUri.getPath().substring(1));
} else if (UriUtil.isLocalResourceUri(mUri)) {
inputStream = mContext.getResources().openRawResource(Integer.parseInt(mUri.getPath().substring(1)));
}
if (inputStream != null) {
final Pair<Integer, Integer> size = BitmapUtil.decodeDimensions(inputStream);
if (size != null && size.first > 0 && size.second > 0) {
WritableMap sizes = Arguments.createMap();
sizes.putInt("width", size.first);
sizes.putInt("height", size.second);
mPromise.resolve(sizes);
}
} else {
mPromise.reject(ERROR_GET_SIZE_FAILURE, "Open file failed");
}

@Override
protected void onFailureImpl(DataSource<CloseableReference<CloseableImage>> dataSource) {
promise.reject(ERROR_GET_SIZE_FAILURE, dataSource.getFailureCause());
} catch (IOException e) {
mPromise.reject(ERROR_GET_SIZE_FAILURE, e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// Do nothing
}
}
};
dataSource.subscribe(dataSubscriber, CallerThreadExecutor.getInstance());
}
}
}

/**
Expand Down