Fresco 缓存+进度条+渐进效果

最新推荐文章于 2022-08-24 15:05:38 发布

原创最新推荐文章于 2022-08-24 15:05:38 发布 · 219 阅读

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本文介绍了如何在Android应用中使用Fresco库设置磁盘缓存，并演示了如何配置渐进式图片加载，包括创建ImagePipelineConfig和使用GenericDraweeHierarchy实现加载过程中的进度条和图片预加载。

设置缓存

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //TODO 设置磁盘缓存的配置 , 生成配置文件
        ImagePipelineConfig week2 = ImagePipelineConfig.newBuilder(this)
                .setMainDiskCacheConfig(DiskCacheConfig.newBuilder(this)
                        .setBaseDirectoryName("week2")//TODO 设置缓存文件名称
                        .setBaseDirectoryPath(Environment.getExternalStorageDirectory())//TODO 设置缓存路径
                        .setMaxCacheSize(10 * 1024 * 1024)//TODO 设置缓存大小
                        .build())
                .build();

        Fresco.initialize(this);
    }
}

进度条 + 渐进式

public class MainActivity extends AppCompatActivity {


    private SimpleDraweeView img;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        img = (SimpleDraweeView) findViewById(R.id.img);
        //TODO 进度条
        GenericDraweeHierarchyBuilder builder = new GenericDraweeHierarchyBuilder(getResources());
        GenericDraweeHierarchy build = builder
                .setFadeDuration(3000)
                .setProgressBarImage(new ProgressBarDrawable())//TODO 设置进度条图片
                .build();
        img.setHierarchy(build);
//        img.setImageURI("http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2");
        //TODO 渐进式
        AbstractDraweeController adc = Fresco.newDraweeControllerBuilder()
                .setImageRequest(ImageRequestBuilder.newBuilderWithSource(Uri.parse("http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2"))
                        .setProgressiveRenderingEnabled(true)
                        .build())
                .setTapToRetryEnabled(true)
                .setOldController(img.getController())
                .build();
        img.setController(adc);
    }
}