c22bdbe205
Reviewed By: passy Differential Revision: D15900104 fbshipit-source-id: 90f53fefbedfa32ed275900542f94650f487a679
89 lines
2.6 KiB
Markdown
89 lines
2.6 KiB
Markdown
---
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id: images-plugin
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title: Images Setup
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sidebar_label: Images
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---
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Currently, the images plugin only supports [Fresco](https://frescolib.org/) for Android as backend, but just like the network plugin, support for other image loading libraries
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could easily be added. Send us a PR!
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## Fresco and Android
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```java
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import com.facebook.flipper.plugins.fresco.FrescoFlipperPlugin;
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client.addPlugin(new FrescoFlipperPlugin());
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```
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The `FrescoFlipperPlugin` constructor offers a whole lot of configuration options which
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can be useful if you have an advanced setup of Fresco in your application:
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```java
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FrescoFlipperPlugin(
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DebugImageTracker imageTracker,
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PlatformBitmapFactory bitmapFactory,
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@Nullable FlipperObjectHelper flipperObjectHelper,
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DebugMemoryManager memoryManager,
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FlipperPerfLogger perfLogger,
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@Nullable FrescoFlipperDebugPrefHelper debugPrefHelper,
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@Nullable CloseableReferenceLeakTracker closeableReferenceLeakTracker) { ... }
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```
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### Leak Tracking
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The Flipper plugin can help you track down `CloseableReferences` who have not had
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`close()` called on them. This can have a negative impact on the performance of
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your application.
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Do enable this functionality, you need to create a `CloseableReferenceLeakTracker`
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and set it in both your `ImagePipelineConfig` for Fresco and the `FrescoPluginPlugin`
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on creation.
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```java
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import com.facebook.imagepipeline.debug.FlipperCloseableReferenceLeakTracker;
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// ...
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FlipperCloseableReferenceLeakTracker leakTracker = new FlipperCloseableReferenceLeakTracker();
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new ImagePipelineConfig.Builder()
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// ...
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.setCloseableReferenceLeakTracker(leakTracker)
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.build();
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client.addPlugin(new FrescoFlipperPlugin(
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new FlipperImageTracker(),
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Fresco.getImagePipelineFactory().getPlatformBitmapFactory(),
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null,
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new NoOpDebugMemoryManager(),
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new NoOpFlipperPerfLogger(),
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null,
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leakTracker));
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```
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### Attribution
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In order to annotate images with the context they are used in, you have to set a
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caller context when loading the image. This can be any object, so for the simplest
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case, a String will suffice.
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```java
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String callerContext = "my_feature";
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// For DraweeViews:
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draweeView.setImageURI(uri, callerContext);
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// For prefetching:
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ImagePipeline imagePipeline = Fresco.getImagePipeline();
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imagePipeline.prefetchToDiskCache(imageRequest, callerContext);
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// For manually fetching an image:
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DataSource<CloseableReference<CloseableImage>>
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dataSource = imagePipeline.fetchDecodedImage(imageRequest, callerContext);
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```
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If a caller context is supplied, the image will be properly attributed in the
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Flipper image plugin.
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