ImageLoader和Picasso

#下載下傳資源jar

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

将jar導入libs

必須加入權限

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

public class MyAppilication extends Application{
	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this)
		.memoryCacheExtraOptions(480, 800)
		//max width ,max height ,即儲存的每個緩存檔案的最大長度
		.discCacheExtraOptions(480, 800, null)
		// Can slow ImageLoader use it carefully(Better don't use it
		// 設定緩存的詳細資訊，最好不要設定這個
		.threadPoolSize(3)
		// 線程池内加載的數量
		.threadPriority(Thread.NORM_PRIORITY-2)
		.denyCacheImageMultipleSizesInMemory()
		.memoryCache(new UsingFreqLimitedMemoryCache(2*1024*1024))
		// You can pass your own memory cache
		// implementation 你可以通過自己的記憶體緩存實作
		.memoryCacheSize(2*1024*1024)
		.discCacheSize(50*1024*1024)
		.discCacheFileNameGenerator(new Md5FileNameGenerator())
		// 将儲存的時候的url名稱用MD5加密
		.tasksProcessingOrder(QueueProcessingType.LIFO)
		.discCacheFileCount(100)
		//緩存檔案的數量
		.discCache(new UnlimitedDiskCache(new File(Environment.getExternalStorageDirectory()+"myApp/imgCache")
				))
		//自定義緩存路徑
		.defaultDisplayImageOptions(getDisplayOptions())
		.imageDownloader(
				new BaseImageDownloader(this, 5*1000, 30*1000))
				//  5*1000 連接配接時間
				//  30*1000 加載逾時時間
				.writeDebugLogs()// Remove for release app
		.build();
		ImageLoader.getInstance().init(config);
		
	}
	private DisplayImageOptions getDisplayOptions(){
		DisplayImageOptions options;
		options = new DisplayImageOptions.Builder()
		.showImageOnLoading(R.drawable.ic_launcher)//設定圖檔在下載下傳期間顯示的圖檔
		.showImageForEmptyUri(R.drawable.ic_launcher)// 設定圖檔Uri為空或者錯誤的時候顯示的圖檔
		.showImageOnFail(R.drawable.ic_launcher)//設定圖檔加載/解碼過程中錯誤時候顯示的圖檔
		.cacheInMemory(true)//設定下載下傳的圖檔是否緩存在記憶體中
		.cacheOnDisc(true)//設定下載下傳的圖檔是否緩存在SD卡中
		.considerExifParams(true)//是否考慮JPEG圖像EXIF參數（旋轉，翻轉）
		.imageScaleType(ImageScaleType.EXACTLY_STRETCHED)// 設定圖檔一如何的編碼方式顯示
		.bitmapConfig(Bitmap.Config.RGB_565)//設定圖檔的解碼類型
		// .delayBeforeLoading(int delayInMillis)
		// delayInMillis為你設定的下載下傳前的延遲時間
		//設定圖檔加入緩存前，對bitmap進行設定
		//.preProcessor(BitmapProcessor preProcessor)
		.resetViewBeforeLoading(true)//設定圖檔在下載下傳前是否重置，複位
		.displayer(new RoundedBitmapDisplayer(20))//是否設定為圓角，弧度為多少
		.displayer(new FadeInBitmapDisplayer(100))//是否圖檔加載好後漸入的動畫的時間
		.build();// 建構完成
		return options;
	}

}

           

MainActivity

public class MainActivity extends Activity {
	private ImageLoader loader;
	private ImageView mImageView;
	

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        loader = ImageLoader.getInstance(); 
        
        loader.init(ImageLoaderConfiguration.createDefault(MainActivity.this));
        mImageView = (ImageView) findViewById(R.id.imageview);
//        loader.displayImage("http://www.baidu.com/img/bd_logo1.png", mImageView);
        loader.displayImage("http://www.baidu.com/img/bd_logo1.png", mImageView, new ImageLoadingListener() {
			
			@Override
			public void onLoadingStarted(String arg0, View arg1) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this, "onLoadingStarted", Toast.LENGTH_SHORT).show();
			}
			
			@Override
			public void onLoadingFailed(String arg0, View arg1, FailReason arg2) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this, "onLoadingFailed", Toast.LENGTH_SHORT).show();
			}
			
			@Override
			public void onLoadingComplete(String arg0, View arg1, Bitmap arg2) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this, "onLoadingComplete", Toast.LENGTH_SHORT).show();
			}
			
			@Override
			public void onLoadingCancelled(String arg0, View arg1) {
				// TODO Auto-generated method stub
				Toast.makeText(MainActivity.this, "onLoadingCancelled", Toast.LENGTH_SHORT).show();
			}
		});
    }

}
           

##Picasso

http://blog.csdn.net/theone10211024/article/details/45604373