• 演示效果

　　

 

• 核心代码

　　普通图片

 GlideApp.with(this)
                    .load("https://www.baidu.com/img/bd_logo.png")
                    .into(mImageView);　

　　圆形图片

 GlideApp.with(this)
                    .load("https://www.baidu.com/img/bd_logo.png")
                    .circleCrop()
                    .into(mImageView);

　　圆角图片

 GlideApp.with(this)
                    .load("https://www.baidu.com/img/bd_logo.png")
                    .transform(new RoundedCorners((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                            20, getResources().getDisplayMetrics())))
                    .into(mImageView);

 

• 引用依赖

 　　build.gradle

 　 // 图片加载框架：https://github.com/bumptech/glide
    // 官方使用文档：https://muyangmin.github.io/glide-docs-cn/
    implementation 'com.github.bumptech.glide:glide:4.12.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'

　　⭐由于以上加载的为网络图片，引入网络请求框架以及网络权限

    // 网络请求框架：https://github.com/getActivity/EasyHttp
    implementation 'com.hjq:http:9.0'
    // OkHttp 框架：https://github.com/square/okhttp
    // noinspection GradleDependency
    implementation 'com.squareup.okhttp3:okhttp:3.12.12'

 

• 添加权限

　　AndroidManifest.xml

 <uses-permission android:name="android.permission.INTERNET"></uses-permission>

 

⭐此时加载了Glide 依赖，但仍然无法使用GlideApp

参考以下博文：GlideApp的由来

Glide4.0源码全解析（一），GlideAPP和.with()方法背后的故事

Glide4.0源码全解析（二），load()背后的故事

Glide4.0源码全解析（三），into()方法背后的故事

主要解决方法：创建一个类 extends AppGlideModule 添加 @GlideModule 注解

 

• 添加AndroidProject的有关构建GlideApp代码

　　

 

 GlideConfig.class

package com.hjq.demo.http.glide;

import android.content.Context;

import androidx.annotation.NonNull;

import com.bumptech.glide.Glide;
import com.bumptech.glide.GlideBuilder;
import com.bumptech.glide.Registry;
import com.bumptech.glide.annotation.GlideModule;
import com.bumptech.glide.load.engine.bitmap_recycle.LruBitmapPool;
import com.bumptech.glide.load.engine.cache.DiskLruCacheWrapper;
import com.bumptech.glide.load.engine.cache.LruResourceCache;
import com.bumptech.glide.load.engine.cache.MemorySizeCalculator;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.module.AppGlideModule;
import com.bumptech.glide.request.RequestOptions;
import com.hjq.demo.R;
import com.hjq.http.EasyConfig;

import java.io.File;
import java.io.InputStream;

/**
 *    author : Android 轮子哥
 *    github : https://github.com/getActivity/AndroidProject
 *    time   : 2019/12/15
 *    desc   : Glide 全局配置
 */
@GlideModule
public final class GlideConfig extends AppGlideModule {

    /** 本地图片缓存文件最大值 */
    private static final int IMAGE_DISK_CACHE_MAX_SIZE = 500 * 1024 * 1024;

    @SuppressWarnings("ResultOfMethodCallIgnored")
    @Override
    public void applyOptions(@NonNull Context context, @NonNull GlideBuilder builder) {
        // 读写外部缓存目录不需要申请存储权限
        File diskCacheFile = new File(context.getCacheDir(), "glide");
        // 如果这个路径是一个文件
        if (diskCacheFile.exists() && diskCacheFile.isFile()) {
            // 执行删除操作
            diskCacheFile.delete();
        }
        // 如果这个路径不存在
        if (!diskCacheFile.exists()) {
            // 创建多级目录
            diskCacheFile.mkdirs();
        }
        builder.setDiskCache(() -> DiskLruCacheWrapper.create(diskCacheFile, IMAGE_DISK_CACHE_MAX_SIZE));

        MemorySizeCalculator calculator = new MemorySizeCalculator.Builder(context).build();
        int defaultMemoryCacheSize = calculator.getMemoryCacheSize();
        int defaultBitmapPoolSize = calculator.getBitmapPoolSize();

        int customMemoryCacheSize = (int) (1.2 * defaultMemoryCacheSize);
        int customBitmapPoolSize = (int) (1.2 * defaultBitmapPoolSize);

        builder.setMemoryCache(new LruResourceCache(customMemoryCacheSize));
        builder.setBitmapPool(new LruBitmapPool(customBitmapPoolSize));

        builder.setDefaultRequestOptions(new RequestOptions()
                // 设置默认加载中占位图
                .placeholder(R.drawable.image_loading_bg)
                // 设置默认加载出错占位图
                .error(R.drawable.image_error_bg));
    }

    @Override
    public void registerComponents(@NonNull Context context, @NonNull Glide glide, @NonNull Registry registry) {
        // Glide 默认使用的是 HttpURLConnection 来做网络请求，这里切换成更高效的 OkHttp
        registry.replace(GlideUrl.class, InputStream.class, new OkHttpLoader.Factory(EasyConfig.getInstance().getClient()));
    }

    @Override
    public boolean isManifestParsingEnabled() {
        return false;
    }
}

OkHttpFetcher.class

package com.vertex.myapplication.http.glide;

import androidx.annotation.NonNull;

import com.bumptech.glide.Priority;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.HttpException;
import com.bumptech.glide.load.data.DataFetcher;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.util.ContentLengthInputStream;
import com.bumptech.glide.util.Preconditions;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
 *    author : Android 轮子哥
 *    github : https://github.com/getActivity/AndroidProject
 *    time   : 2019/12/15
 *    desc   : OkHttp 加载器
 */
public final class OkHttpFetcher implements DataFetcher<InputStream>, Callback {

    private final Call.Factory mCallFactory;
    private final GlideUrl mGlideUrl;
    private InputStream mInputStream;
    private ResponseBody mResponseBody;
    private DataCallback<? super InputStream> mDataCallback;
    private volatile Call mCall;

    OkHttpFetcher(Call.Factory factory, GlideUrl url) {
        mCallFactory = factory;
        mGlideUrl = url;
    }

    @Override
    public void loadData(@NonNull Priority priority, @NonNull final DataCallback<? super InputStream> callback) {
        Request.Builder requestBuilder = new Request.Builder().url(mGlideUrl.toStringUrl());
        for (Map.Entry<String, String> headerEntry : mGlideUrl.getHeaders().entrySet()) {
            String key = headerEntry.getKey();
            requestBuilder.addHeader(key, headerEntry.getValue());
        }
        Request request = requestBuilder.build();
        mDataCallback = callback;

        mCall = mCallFactory.newCall(request);
        mCall.enqueue(this);
    }

    @Override
    public void onFailure(@NonNull Call call, @NonNull IOException e) {
        mDataCallback.onLoadFailed(e);
    }

    @Override
    public void onResponse(@NonNull Call call, @NonNull Response response) {
        mResponseBody = response.body();
        if (response.isSuccessful()) {
            long contentLength = Preconditions.checkNotNull(mResponseBody).contentLength();
            mInputStream = ContentLengthInputStream.obtain(mResponseBody.byteStream(), contentLength);
            mDataCallback.onDataReady(mInputStream);
        } else {
            mDataCallback.onLoadFailed(new HttpException(response.message(), response.code()));
        }
    }

    @Override
    public void cleanup() {
        try {
            if (mInputStream != null) {
                mInputStream.close();
            }
        } catch (IOException ignored) {}

        if (mResponseBody != null) {
            mResponseBody.close();
        }
        mDataCallback = null;
    }

    @Override
    public void cancel() {
        if (mCall != null) {
            mCall.cancel();
        }
    }

    @NonNull
    @Override
    public Class<InputStream> getDataClass() {
        return InputStream.class;
    }

    @NonNull
    @Override
    public DataSource getDataSource() {
        return DataSource.REMOTE;
    }
}

 OkHttpLoader.class

package com.hjq.demo.http.glide;

import androidx.annotation.NonNull;

import com.bumptech.glide.load.Options;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.load.model.ModelLoader;
import com.bumptech.glide.load.model.ModelLoaderFactory;
import com.bumptech.glide.load.model.MultiModelLoaderFactory;

import java.io.InputStream;

import okhttp3.Call;

/**
 *    author : Android 轮子哥
 *    github : https://github.com/getActivity/AndroidProject
 *    time   : 2019/12/15
 *    desc   : OkHttp 加载模型
 */
public final class OkHttpLoader implements ModelLoader<GlideUrl, InputStream> {

    private final Call.Factory mFactory;

    private OkHttpLoader(@NonNull Call.Factory factory) {
        mFactory = factory;
    }

    @Override
    public boolean handles(@NonNull GlideUrl url) {
        return true;
    }

    @Override
    public LoadData<InputStream> buildLoadData(@NonNull GlideUrl model, int width, int height, @NonNull Options options) {
        return new LoadData<>(model, new OkHttpFetcher(mFactory, model));
    }

    public static class Factory implements ModelLoaderFactory<GlideUrl, InputStream> {

        private final Call.Factory mFactory;

        Factory(@NonNull Call.Factory factory) {
            mFactory = factory;
        }

        @NonNull
        @Override
        public ModelLoader<GlideUrl, InputStream> build(@NonNull MultiModelLoaderFactory multiFactory) {
            return new OkHttpLoader(mFactory);
        }

        @Override
        public void teardown() {}
    }
}

 

•  GlideConfig占位图

Android vector 参考博文：Android Studio神器之Vector Asset

R.drawable.image_loading_bg

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="180dp"
    android:height="180dp"
    android:viewportWidth="180"
    android:viewportHeight="180">

    <path
        android:fillColor="@color/black"
        android:fillAlpha="0.18"
        android:strokeAlpha="0.18"
        android:pathData="M116.69,42.5 C118.34,42.3,120.68,41.43,121.74,43.27
C122.94,46.03,123.19,49.07,123.84,51.98 C124.39,55.2,125.59,58.45,124.77,61.74
C110.83,60.27,96.93,58.41,83.01,56.68 C79.82,56.36,76.64,55.92,73.55,55.04
C74.11,53.54,74.86,51.92,76.67,51.72 C89.99,48.59,103.36,45.63,116.69,42.5 Z" />
    <path
        android:fillColor="@color/black"
        android:fillAlpha="0.18"
        android:strokeAlpha="0.18"
        android:pathData="M39.17,62.06 C39.85,59.59,42.92,59.71,44.91,59.02
C45.75,64.24,44.56,69.47,43.63,74.6 C43.05,74.66,41.91,74.77,41.34,74.83
C40.41,70.62,39.1,66.41,39.17,62.06 Z" />
    <path
        android:fillColor="@color/black"
        android:fillAlpha="0.18"
        android:strokeAlpha="0.18"
        android:pathData="M55.17,63.02 C56.68,62.27,58.44,62.9,60.04,62.93
C85.05,66.1,110.07,69.09,135.08,72.19 C138.1,72.15,139.04,75.49,138.56,77.95
C136.78,94.98,134.69,111.99,132.7,129 C132.23,132.41,132.31,135.96,131.14,139.24
C129.69,141.09,127.08,140.18,125.09,140.15
C102.51,137.22,79.9,134.5,57.32,131.53 C54.25,131.04,51,131.11,48.08,129.93
C46.39,128.87,46.92,126.63,46.99,124.98 C49.21,106.65,51.23,88.31,53.18,69.95
C53.69,67.69,53.14,64.57,55.17,63.02 M118.3,81.47
C114.1,83.2,112.65,88.96,115.62,92.43 C118.38,96.38,125.14,95.34,126.76,90.86
C128.97,85.83,123.8,79.05,118.3,81.47 M84.19,87.31
C82.76,88.13,81.59,89.33,80.43,90.49 C73.1,98.12,65.54,105.54,58.11,113.07
C56.74,114.2,56.52,116.68,58.35,117.48 C61.47,118.46,64.76,118.66,67.99,119.05
C79.67,120.21,91.26,122.13,102.94,123.32 C108.96,123.91,114.94,125.48,121,125.15
C122.17,125.26,123.01,123.61,122.26,122.73
C118.02,115.66,113.63,108.67,109.28,101.66
C108.33,100.31,107.51,98.68,105.95,97.94 C102.43,97.99,100.63,103.03,97.03,101.9
C93.15,97.93,91.6,92.26,87.88,88.14 C86.97,87.13,85.45,86.64,84.19,87.31 Z" />
</vector>

 

R.drawable.image_error_bg

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="180dp"
    android:height="180dp"
    android:viewportWidth="180"
    android:viewportHeight="180">

    <path
        android:fillAlpha="0.18"
        android:fillColor="@color/black"
        android:pathData="M43.81,52.8 C45.6,50.77,48.52,51.06,50.96,50.96
C66.31,51.08,81.66,50.92,97.01,51.04 C95.9,55.94,94.85,60.85,93.65,65.73
C92.59,70.05,88.83,72.85,86.23,76.23 C82.75,80.75,77.93,84.49,76.21,90.12
C71.8,103.07,67.12,115.92,62.69,128.86 C57.47,128.98,52.24,129.3,47.04,128.82
C43.75,128.52,41.71,125.09,42.01,121.98 C41.95,101.33,42.07,80.68,41.96,60.03
C42.06,57.56,41.75,54.61,43.81,52.8 M62.28,66.36
C57.05,67.76,55.21,75.2,59.27,78.81 C63.12,83.04,70.98,80.6,71.83,74.97
C73.14,69.67,67.41,64.51,62.28,66.36 Z"
        android:strokeAlpha="0.18" />

    <path
        android:fillAlpha="0.18"
        android:fillColor="@color/black"
        android:pathData="M113.09,51.02 C119.42,51.05,125.76,50.82,132.09,51.08
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C137.94,122.48,138.23,125.42,136.18,127.23
C134.37,129.24,131.45,128.94,129.01,129.04
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Z"
        android:strokeAlpha="0.18" />
</vector>