Android 开发 框架系列 Android-Universal-Image-Loader 图片加载使用demo

Android-Universal-Image-Loader

github地址：https://github.com/nostra13/Android-Universal-Image-Loader

加载缓存网络图片的工具，此工具的最大优点是提供了下载缓存进度接口，缺点需要自己处理加载后的图片

使用效果：

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageSize;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
import com.nostra13.universalimageloader.core.listener.ImageLoadingProgressListener;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
/** 图片下载demo
 *  https://github.com/nostra13/Android-Universal-Image-Loader
 */
public class UnlversalImageLoaderDemo extends AppCompatActivity implements View.OnClickListener {
    private Button mBtn1,mBtn2,mBtn3,mBtn4,mBtn5,mBtn6;
    private ImageView mImage;
    private ImageLoader mImageLoader;
    private Bitmap mBitmap;
    private DisplayImageOptions mOptions;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_unlversal_image_loader);
        mBtn1 = (Button)findViewById(R.id.btn1);
        mBtn2 = (Button)findViewById(R.id.btn2);
        mBtn3 = (Button)findViewById(R.id.btn3);
        mBtn4 = (Button)findViewById(R.id.btn4);
        mBtn5 = (Button)findViewById(R.id.btn5);
        mBtn6 = (Button)findViewById(R.id.btn6);
        mBtn1.setOnClickListener(this);
        mBtn2.setOnClickListener(this);
        mBtn3.setOnClickListener(this);
        mBtn4.setOnClickListener(this);
        mBtn5.setOnClickListener(this);
        mBtn6.setOnClickListener(this);
        mImage = (ImageView)findViewById(R.id.image);
        /**
         * 初始化工作
         */
        ImageLoaderConfiguration imageLoaderConfiguration = new ImageLoaderConfiguration.Builder(UnlversalImageLoaderDemo.this).build();
        mImageLoader = ImageLoader.getInstance();
        mImageLoader.init(imageLoaderConfiguration);
        /* 选项功能模板
        DisplayImageOptions options = new DisplayImageOptions.Builder()
            .showImageOnLoading(R.drawable.ic_stub) // resource or drawable
            .showImageForEmptyUri(R.drawable.ic_empty) // resource or drawable
            .showImageOnFail(R.drawable.ic_error) // resource or drawable
            .resetViewBeforeLoading(false)  // default
            .delayBeforeLoading(1000)
            .cacheInMemory(false) // default
            .cacheOnDisk(false) // default
            .preProcessor(...)
            .postProcessor(...)
            .extraForDownloader(...)
            .considerExifParams(false) // default
            .imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2) // default
            .bitmapConfig(Bitmap.Config.ARGB_8888) // default
            .decodingOptions(...)
            .displayer(new SimpleBitmapDisplayer()) // default
            .handler(new Handler()) // default
            .build();
         */
        mOptions = new DisplayImageOptions.Builder().build();
    }
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.btn1:
                /**
                 * 第一种加载图片的方式
                 */
                mImageLoader.displayImage("https://s0.52poke.wiki/wiki/thumb/2/21/001Bulbasaur.png/300px-001Bulbasaur.png",mImage);
                break;
            case R.id.btn2:
                /**
                 * 第二种加载图片的方式
                 */
                mImageLoader.loadImage("https://s0.52poke.wiki/wiki/thumb/7/73/002Ivysaur.png/300px-002Ivysaur.png",new SimpleImageLoadingListener(){
                    @Override
                    public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                        mImage.setImageBitmap(loadedImage);
                    }
                });
                break;
            case R.id.btn3:
                /**
                 * 第三种加载图片的方式
                 */
                mImageLoader.displayImage("https://s0.52poke.wiki/wiki/thumb/a/ae/003Venusaur.png/300px-003Venusaur.png", mImage,mOptions, new ImageLoadingListener() {
                    @Override
                    public void onLoadingStarted(String s, View view) {
                        //开始加载
                        Toast.makeText(UnlversalImageLoaderDemo.this,"开始加载妙蛙花",Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    public void onLoadingFailed(String s, View view, FailReason failReason) {
                        //加载失败
                        Toast.makeText(UnlversalImageLoaderDemo.this,"妙蛙花加载失败",Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    public void onLoadingComplete(String s, View view, Bitmap bitmap) {
                        //加载成功
                        Toast.makeText(UnlversalImageLoaderDemo.this,"妙蛙花加载成功",Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    public void onLoadingCancelled(String s, View view) {
                        //取消加载
                        Toast.makeText(UnlversalImageLoaderDemo.this,"妙蛙花取消加载",Toast.LENGTH_SHORT).show();
                    }
                }, new ImageLoadingProgressListener() {
                    @Override
                    public void onProgressUpdate(String s, View view, int i, int i1) {
                        //下载进度
                        /**
                         * String s = 下载网站url
                         * View view = 你导入的view 可以是null
                         * int i = 当前下载字节
                         * int i1 = 总字节
                         */
                    }
                });
                break;
            case R.id.btn4:
                /**
                 * 第四种加载图片的方式
                 */
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        mBitmap = mImageLoader.loadImageSync("https://s0.52poke.wiki/wiki/thumb/5/53/054Psyduck.png/300px-054Psyduck.png");
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                mImage.setImageBitmap(mBitmap);
                            }
                        });
                    }
                }).start();
                break;
            case R.id.btn5:
                /**
                 * 第五种处理图片的方式,处理图片大小
                 */
                ImageSize targetSize1 = new ImageSize(100, 100); // result Bitmap will be fit to this size
                mImageLoader.loadImage("https://s0.52poke.wiki/wiki/thumb/c/c6/094Gengar.png/300px-094Gengar.png", targetSize1, mOptions, new SimpleImageLoadingListener() {
                    @Override
                    public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                        mImage.setImageBitmap(loadedImage);
                    }
                });
                break;
            case R.id.btn6:
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        ImageSize targetSize2 = new ImageSize(80, 50); // result Bitmap will be fit to this size
                        mBitmap = mImageLoader.loadImageSync("https://s0.52poke.wiki/wiki/thumb/e/e2/133Eevee.png/300px-133Eevee.png", targetSize2, mOptions);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                mImage.setImageBitmap(mBitmap);
                            }
                        });
                    }
                }).start();
                break;
            default:
                break;
        }
    }
}