Question

使用Glide将网址下载到ImageView非常简单：

Glide
   .with(context)
   .load(getIntent().getData())
   .placeholder(R.drawable.ic_loading)
   .centerCrop()
   .into(imageView);

我想知道我是否也可以下载到Bitmap？我想下载到原始位图，然后我可以使用其他工具进行操作。我已经完成了代码并且没有看到如何做到这一点。

Answer 1

我对Glide不太熟悉，但看起来如果你知道目标尺寸，你可以使用这样的东西：

Bitmap theBitmap = Glide.
        with(this).
        load("http://....").
        asBitmap().
        into(100, 100). // Width and height
        get();

看起来您可以传递-1,-1，并获得完整尺寸的图像（纯粹基于测试，无法看到它记录在案）。

注意into(int,int)会返回FutureTarget<Bitmap>，因此您必须将其包含在涵盖ExecutionException和InterruptedException的try-catch块中。这是一个更完整的示例实现，经过测试和运行：

class SomeActivity extends Activity {

    private Bitmap theBitmap = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // onCreate stuff ...
        final ImageView image = (ImageView) findViewById(R.id.imageView);

        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... params) {
                Looper.prepare();
                try {
                    theBitmap = Glide.
                        with(SomeActivity.this).
                        load("https://www.google.es/images/srpr/logo11w.png").
                        asBitmap().
                        into(-1,-1).
                        get();
                 } catch (final ExecutionException e) {
                     Log.e(TAG, e.getMessage());
                 } catch (final InterruptedException e) {
                     Log.e(TAG, e.getMessage());
                 }
                 return null;
            }
            @Override
            protected void onPostExecute(Void dummy) {
                if (null != theBitmap) {
                    // The full bitmap should be available here
                    image.setImageBitmap(theBitmap);
                    Log.d(TAG, "Image loaded");
                };
            }
        }.execute();
    }
}

在下面的评论（和this appears to be the official way too）中遵循Monkeyless的建议，您可以使用SimpleTarget，可选择与override(int,int)结合使用，以大大简化代码。但是，在这种情况下，必须提供确切的大小（不接受任何低于1的值）：

Glide
    .with(getApplicationContext())
    .load("https://www.google.es/images/srpr/logo11w.png")
    .asBitmap()
    .into(new SimpleTarget<Bitmap>(100,100) {
        @Override
        public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
            image.setImageBitmap(resource); // Possibly runOnUiThread()
        }
    });

如@hennry 所示，如果您需要相同的图片，请使用new SimpleTarget<Bitmap>()

Answer 2

确保您在Lastest version

implementation 'com.github.bumptech.glide:glide:4.9.0'

<强>科特林：

Glide.with(this)
        .asBitmap()
        .load(imagePath)
        .into(object : CustomTarget<Bitmap>(){
            override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {
                imageView.setImageBitmap(resource)
            }
            override fun onLoadCleared(placeholder: Drawable?) {
                // this is called when imageView is cleared on lifecycle call or for
                // some other reason.
                // if you are referencing the bitmap somewhere else too other than this imageView
                // clear it here as you can no longer have the bitmap
            }
        })

位图大小：

如果你想使用图像的原始大小，请使用上面的默认构造函数，否则你可以传递所需的位图大小

into(object : CustomTarget<Bitmap>(1980, 1080)

<强>爪哇：

Glide.with(this)
        .asBitmap()
        .load(path)
        .into(new CustomTarget<Bitmap>() {
            @Override
            public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
                imageView.setImageBitmap(resource);
            }

            @Override
            public void onLoadCleared(@Nullable Drawable placeholder) {
            }
        });

旧答案：

compile 'com.github.bumptech.glide:glide:4.8.0'及以下

Glide.with(this)
        .asBitmap()
        .load(path)
        .into(new SimpleTarget<Bitmap>() {
            @Override
            public void onResourceReady(Bitmap resource, Transition<? super Bitmap> transition) {
                imageView.setImageBitmap(resource);
            }
        });

compile 'com.github.bumptech.glide:glide:3.7.0'及以下

Glide.with(this)
        .load(path)
        .asBitmap()
        .into(new SimpleTarget<Bitmap>() {
            @Override
            public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
                imageView.setImageBitmap(resource);
            }
        });

现在您可能会看到警告SimpleTarget is deprecated

<强>原因：

弃用SimpleTarget的主要目的是警告你它诱使你打破Glide的API合同的方式。具体来说，它没有做任何事情迫使你停止使用任何清除SimpleTarget后加载的资源，可以导致崩溃和图形损坏。

只要清除了imageView，确保不使用位图，SimpleTarget仍然可以使用。

Answer 3

看起来像重写Target类或其中一个类似BitmapImageViewTarget的实现，并重写setResource方法来捕获位图可能是要走的路......

这是未经测试的。： - ）

    Glide.with(context)
         .load("http://goo.gl/h8qOq7")
         .asBitmap()
         .into(new BitmapImageViewTarget(imageView) {
                     @Override
                     protected void setResource(Bitmap resource) {
                         // Do bitmap magic here
                         super.setResource(resource);
                     }
         });

Answer 4

这对我有用：https://github.com/bumptech/glide/wiki/Custom-targets#overriding-default-behavior

import com.bumptech.glide.Glide;
import com.bumptech.glide.request.transition.Transition;
import com.bumptech.glide.request.target.BitmapImageViewTarget;

...

Glide.with(yourFragment)
  .load("yourUrl")
  .asBitmap()
  .into(new BitmapImageViewTarget(yourImageView) {
    @Override
    public void onResourceReady(Bitmap bitmap, Transition<? super Bitmap> anim) {
        super.onResourceReady(bitmap, anim);
        Palette.generateAsync(bitmap, new Palette.PaletteAsyncListener() {  
            @Override
            public void onGenerated(Palette palette) {
                // Here's your generated palette
                Palette.Swatch swatch = palette.getDarkVibrantSwatch();
                int color = palette.getDarkVibrantColor(swatch.getTitleTextColor());
            }
        });
    }
});

Answer 5

更新

现在我们需要使用Custom Targets

示例代码

    Glide.with(mContext)
            .asBitmap()
            .load("url")
            .into(new CustomTarget<Bitmap>() {
                @Override
                public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {

                }

                @Override
                public void onLoadCleared(@Nullable Drawable placeholder) {
                }
            });

如何使用滑行将图像下载到位图中？

以上所有答案正确无误

因为新版本的Glide implementation 'com.github.bumptech.glide:glide:4.8.0'

您会在代码中找到以下错误

.asBitmap() 中没有 glide:4.8.0

~~SimpleTarget<Bitmap>~~ 已弃用

这是解决方法

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.request.Request;
import com.bumptech.glide.request.RequestOptions;
import com.bumptech.glide.request.target.SizeReadyCallback;
import com.bumptech.glide.request.target.Target;
import com.bumptech.glide.request.transition.Transition;



public class MainActivity extends AppCompatActivity {

    ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = findViewById(R.id.imageView);

        Glide.with(this)
                .load("")
                .apply(new RequestOptions().diskCacheStrategy(DiskCacheStrategy.NONE))
                .into(new Target<Drawable>() {
                    @Override
                    public void onLoadStarted(@Nullable Drawable placeholder) {

                    }

                    @Override
                    public void onLoadFailed(@Nullable Drawable errorDrawable) {

                    }

                    @Override
                    public void onResourceReady(@NonNull Drawable resource, @Nullable Transition<? super Drawable> transition) {

                        Bitmap bitmap = drawableToBitmap(resource);
                        imageView.setImageBitmap(bitmap);
                        // now you can use bitmap as per your requirement
                    }

                    @Override
                    public void onLoadCleared(@Nullable Drawable placeholder) {

                    }

                    @Override
                    public void getSize(@NonNull SizeReadyCallback cb) {

                    }

                    @Override
                    public void removeCallback(@NonNull SizeReadyCallback cb) {

                    }

                    @Override
                    public void setRequest(@Nullable Request request) {

                    }

                    @Nullable
                    @Override
                    public Request getRequest() {
                        return null;
                    }

                    @Override
                    public void onStart() {

                    }

                    @Override
                    public void onStop() {

                    }

                    @Override
                    public void onDestroy() {

                    }
                });

    }

    public static Bitmap drawableToBitmap(Drawable drawable) {

        if (drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable) drawable).getBitmap();
        }

        int width = drawable.getIntrinsicWidth();
        width = width > 0 ? width : 1;
        int height = drawable.getIntrinsicHeight();
        height = height > 0 ? height : 1;

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    }
}

Answer 6

如果要将动态位图图像分配给位图变量

kotlin

的示例

backgroundImage = Glide.with(applicationContext).asBitmap().load(PresignedUrl().getUrl(items!![position].img)).into(100, 100).get();

以上答案对我不起作用

.asBitmap应该在.load("http://....")

之前

Answer 7

@ outlyer的回答是正确的，但新的Glide版本有一些变化

我的版本：4.7.1

代码：

 Glide.with(context.applicationContext)
                .asBitmap()
                .load(iconUrl)
                .into(object : SimpleTarget<Bitmap>(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL) {
                    override fun onResourceReady(resource: Bitmap, transition: com.bumptech.glide.request.transition.Transition<in Bitmap>?) {
                        callback.onReady(createMarkerIcon(resource, iconId))
                    }
                })

注意：此代码在UI Thread中运行，因此您可以使用AsyncTask，Executor或其他东西来实现并发（例如@outlyer的代码）如果您想获得原始大小，请将Target.SIZE_ORIGINA作为我的代码。不要使用-1，-1

Answer 8

科特琳的方式-

fun Context.bitMapFromImgUrl(imageUrl: String, callBack: (bitMap: Bitmap) -> Unit) {
    GlideApp.with(this)
        .asBitmap()
        .load(imageUrl)
        .into(object : CustomTarget<Bitmap>() {
            override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {
                callBack(resource)
            }

            override fun onLoadCleared(placeholder: Drawable?) {
                // this is called when imageView is cleared on lifecycle call or for
                // some other reason.
                // if you are referencing the bitmap somewhere else too other than this imageView
                // clear it here as you can no longer have the bitmap
            }
        })
}

Answer 9

对于 Glide 4.10.0 版： Glide.with(context).download(mImageUrl).submit().get()

Answer 10

在 kotlin 中你可以使用

CoroutineScope(Dispatchers.IO).launch {
      Glide.with(this@&YourActivity).asBitmap().load(imageUrl)                           
                        .listener(object : RequestListener<Bitmap> {
                            override fun onLoadFailed(
                                e: GlideException?,
                                model: Any?,
                                target: Target<Bitmap>?,
                                isFirstResource: Boolean
                            ): Boolean {
                                  Log.e("GlideException" ,"${e.message}")
                                return false
                            }

                            override fun onResourceReady(
                                resource: Bitmap?,
                                model: Any?,
                                target: Target<Bitmap>?,
                                dataSource: DataSource?,
                                isFirstResource: Boolean
                            ): Boolean {
                                resource?.let {bitmap->
                                    //here your bitmap is ready you can use it
                                }
                                return false
                            }

                        })
                        .submit().get()//by using this line glide lib behave as synchronously(block instructions until the task is completed) and by removing this line you can use it as a asynchronously(without blocking other operations)  
}

我正在使用

api 'com.github.bumptech.glide:glide:4.12.0'
kapt 'com.github.bumptech.glide:compiler:4.12.0'

Answer 11

较新版本：

GlideApp.with(imageView)
    .asBitmap()
    .override(200, 200)
    .centerCrop()
    .load(mUrl)
    .error(R.drawable.defaultavatar)
    .diskCacheStrategy(DiskCacheStrategy.ALL)
    .signature(ObjectKey(System.currentTimeMillis() / (1000*60*60*24))) //refresh avatar cache every day
    .into(object : CustomTarget<Bitmap>(){
        override fun onLoadCleared(placeholder: Drawable?) {}
        override fun onLoadFailed(errorDrawable: Drawable?) {
            //add context null check in case the user left the fragment when the callback returns
            context?.let { imageView.addImage(BitmapFactory.decodeResource(resources, R.drawable.defaultavatar)) }
        }
        override fun onResourceReady(
            resource: Bitmap,
            transition: Transition<in Bitmap>?) { context?.let { imageView.addImage(resource) } }
    })

如何使用滑动将图像下载到位图中？

11 个答案: