178

使用 Glide将 URL 下载到一个ImageView非常容易：

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

我想知道我是否可以下载到一个Bitmap以及？我想下载一个原始位图，然后我可以使用其他工具进行操作。我已经浏览了代码，但不知道该怎么做。

4

13 回答 13

241

确保您使用的是最新版本

implementation 'com.github.bumptech.glide:glide:4.10.0'

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：

如果要使用图像的原始大小，请使用上述默认构造函数，否则您可以将所需大小传递给位图

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

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) {
            }
        });

老答案：

有 compile 'com.github.bumptech.glide:glide:4.8.0'及低于

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

对于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

原因：

弃用 SimpleTarget 的主要目的是警告您它诱使您破坏 Glide 的 API 契约的方式。具体来说，一旦 SimpleTarget 被清除，它不会强制您停止使用已加载的任何资源，这可能会导致崩溃和图形损坏。

SimpleTarget只要您确保在清除 imageView 后不使用位图，仍然可以使用。

于 2017-01-23T10:40:27.820 回答
199

我对 Glide 不够熟悉，但看起来如果你知道目标大小，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();

看起来您可以通过-1,-1，并获得完整尺寸的图像（纯粹基于测试，看不到它的文档）。

Noteinto(int,int)返回 a FutureTarget<Bitmap>，因此您必须将其包装在覆盖ExecutionExceptionand的 try-catch 块中InterruptedException。这是一个更完整的示例实现，经过测试和工作：

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();
    }
}

按照下面评论中的 Monkeyless 建议（这似乎也是官方方式），您可以使用 a SimpleTarget，可选地加上 withoverride(int,int)来大大简化代码。但是，在这种情况下，必须提供确切的大小（不接受小于 1 的任何内容）：

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()
        }
    });

正如@hennry 所建议的，如果您需要相同的图像，然后使用new SimpleTarget<Bitmap>()

更新

 bitmap = Glide.with(c).asBitmap().load( "url").submit().get();
于 2014-12-10T06:22:34.283 回答
17

它看起来像覆盖Target类或实现之一，BitmapImageViewTarget并覆盖setResource捕获位图的方法可能是要走的路......

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);
                     }
         });
于 2014-12-10T06:17:17.397 回答
11

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 glide 将图像下载到位图中？

以上所有答案都是正确但已过时

因为在新版本的 Glideimplementation 'com.github.bumptech.glide:glide:4.8.0'

您会在代码中发现以下错误

  • .asBitmap()不可用glide:4.8.0

在此处输入图像描述

  • SimpleTarget<Bitmap>已弃用

在此处输入图像描述

这是解决方案

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;
    }
}
于 2019-01-09T06:37:23.143 回答
9

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());
            }
        });
    }
});
于 2015-06-24T00:25:29.390 回答
7

如果要将动态位图图像分配给位图变量

示例kotlin

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

以上答案对我不起作用

.asBitmap应该在.load("http://....")

于 2018-04-26T06:31:38.293 回答
6

新版本更新

Glide.with(context.applicationContext)
    .load(url)
    .listener(object : RequestListener<Drawable> {
        override fun onLoadFailed(
            e: GlideException?,
            model: Any?,
            target: Target<Drawable>?,
            isFirstResource: Boolean
        ): Boolean {
            listener?.onLoadFailed(e)
            return false
        }

        override fun onResourceReady(
            resource: Drawable?,
            model: Any?,
            target: com.bumptech.glide.request.target.Target<Drawable>?,
            dataSource: DataSource?,
            isFirstResource: Boolean
        ): Boolean {
            listener?.onLoadSuccess(resource)
            return false
        }

    })
    .into(this)

旧答案

@outlyer 的回答是正确的，但是新的 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 线程中运行，因此您可以使用 AsyncTask、Executor 或其他东西进行并发（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

于 2018-06-15T03:46:21.463 回答
3

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

于 2021-04-23T09:29:36.137 回答
2

较新的版本：

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) } }
    })
于 2020-03-26T14:22:48.740 回答
2

Kotlin 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
            }
        })
}
于 2020-10-02T08:20:17.770 回答
2

在科特林你可以使用

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)  
}

我在用

api 'com.github.bumptech.glide:glide:4.12.0'
kapt 'com.github.bumptech.glide:compiler:4.12.0'
于 2021-06-18T05:02:10.150 回答
2

Kotlin 函数

inline fun getBitmap(imageUrl: String, block: (Bitmap?) -> Unit) {
        return try {
            val url = URL(imageUrl)
            val image = BitmapFactory.decodeStream(url.openConnection().getInputStream())
            block(image)
        } catch (e: IOException) {
            println(e)
            block(null)
        }
    }
于 2021-11-01T06:58:11.120 回答
1

完整答案

我必须添加一个 try-catch 块，因为如果 URL 无效，现在 Glide 会使应用程序崩溃。

  return try {
            Glide.with(context)
                .asBitmap()
                .load(imageURL)
                .listener(object : RequestListener<Bitmap> {
                    override fun onLoadFailed(
                        e: GlideException?,
                        model: Any?,
                        target: Target<Bitmap>?,
                        isFirstResource: Boolean
                    ): Boolean {
                        Log.e(
                            TAG,
                            "Texture from ResourceID $resourceId could not be Loaded. " +
                                    "Using default Texture"
                        )
                        return false
                    }

                    override fun onResourceReady(
                        resource: Bitmap?,
                        model: Any?,
                        target: Target<Bitmap>?,
                        dataSource: DataSource?,
                        isFirstResource: Boolean
                    ): Boolean {
                        return false
                    }
                })
                .placeholder(DEFAULT_IMAGE)
                .error(DEFAULT_IMAGE)
                .submit()
                .get()
        } catch (ex: Exception) {
            return fromResource(DEFAULT_IMAGE)
        }
于 2021-08-20T19:20:17.073 回答