Android开发常用：Fresco加载图片的几种方式

XML使用

xmlns:fresco="http://schemas.android.com/apk/res-auto"

封装的方法：分别是从res和从网络加载（注：下面的从res加载图片的方法是错误的）

   private void setImageViewFromRes(final String imageName, final SimpleDraweeView imageView){        Observable.create(new ObservableOnSubscribe() {            @Override            public void subscribe(@NonNull ObservableEmitter e) throws Exception {                e.onNext(imageName);            }        }).observeOn(AndroidSchedulers.mainThread()).subscribeOn(Schedulers.io()).subscribe(new Observer() {            @Override            public void onSubscribe(@NonNull Disposable d) {            }            @Override            public void onNext(@NonNull String s) {                Uri uri = Uri.parse("res://" +                        mContext.getPackageName() +                        "/" + s);                imageView.setImageURI( Uri.parse("res://" +                        mContext.getPackageName() +                        "/" + s));            }            @Override            public void onError(@NonNull Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void setImageView(final String uri, final SimpleDraweeView imageView){        Observable.create(new ObservableOnSubscribe() {            @Override            public void subscribe(@NonNull ObservableEmitter e) throws Exception {                e.onNext(uri);            }        }).observeOn(AndroidSchedulers.mainThread()).subscribeOn(Schedulers.io()).subscribe(new Observer() {            @Override            public void onSubscribe(@NonNull Disposable d) {            }            @Override            public void onNext(@NonNull String s) {                imageView.setImageURI(Uri.parse(s));            }            @Override            public void onError(@NonNull Throwable e) {            }            @Override            public void onComplete() {            }        });    }

1.网络图

里面的参数是图片的网络地址

userPhoto.setImageURI(SharedPreferenceUtils.get(context, "myInfo", "Photo", "").toString());

2.drawable图

 /**     * 加载本地图片（drawable图片）     * @param context     * @param simpleDraweeView     * @param id     */    public static void loadResPic(Context context, SimpleDraweeView simpleDraweeView, int id) {        Uri uri = Uri.parse("res://" +                context.getPackageName() +                "/" + id);        simpleDraweeView.setImageURI(uri);    }

3.file图

userPhoto.setImageURI(Uri.parse("file://"+result.getImage().getCompressPath()));

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