Android開發常用:Fresco載入圖片的幾種方式
阿新 • • 發佈:2019-01-11
XML使用
xmlns:fresco="http://schemas.android.com/apk/res-auto"
<!--使用者頭像--> <com.facebook.drawee.view.SimpleDraweeView app:layout_marginTopPercent="1%sh" android:layout_alignParentRight="true" app:layout_marginRightPercent="2%sw" app:layout_widthPercent="8%sw" app:layout_heightPercent="8%sw" android:id="@+id/user_photo" android:layout_width="0dp" android:layout_height="0dp" fresco:placeholderImage="@drawable/user" fresco:actualImageScaleType="centerCrop" fresco:placeholderImageScaleType="fitCenter" fresco:roundAsCircle="true" />
封裝的方法:分別是從res和從網路載入(注:下面的從res載入圖片的方法是錯誤的)
private void setImageViewFromRes(final String imageName, final SimpleDraweeView imageView){ Observable.create(new ObservableOnSubscribe<String>() { @Override public void subscribe(@NonNull ObservableEmitter<String> e) throws Exception { e.onNext(imageName); } }).observeOn(AndroidSchedulers.mainThread()).subscribeOn(Schedulers.io()).subscribe(new Observer<String>() { @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<String>() { @Override public void subscribe(@NonNull ObservableEmitter<String> e) throws Exception { e.onNext(uri); } }).observeOn(AndroidSchedulers.mainThread()).subscribeOn(Schedulers.io()).subscribe(new Observer<String>() { @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() { } }); }
<com.facebook.drawee.view.SimpleDraweeView android:layout_alignParentLeft="true" app:layout_heightPercent="80%h" app:layout_widthPercent="80%h" android:id="@+id/user_photo" app:layout_marginLeftPercent="3%w" android:layout_width="0dp" android:layout_height="0dp" android:layout_centerVertical="true" android:background="@drawable/avatar" fresco:roundAsCircle="true" fresco:roundingBorderColor="@color/gray" fresco:roundingBorderWidth="1px" />
1.網路圖
裡面的引數是圖片的網路地址
userPhoto.setImageURI(SharedPreferenceUtils.get(context, "myInfo", "Photo", "").toString());
2.drawable圖
/**
* 載入本地圖片(drawable圖片)
* @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圖
userPhoto.setImageURI(Uri.parse("file://"+result.getImage().getCompressPath()));