ImageLoader基础使用

需要配置权限

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

需要配置依赖

compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'

需要在清单文件中配置name值

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //初始化Imageloader框架;链式开发思想
        ImageLoaderConfiguration build = new ImageLoaderConfiguration.Builder(this).build();
        //获取ImageLoader的实例初始化配置参数;
        ImageLoader.getInstance().init(build);
    }
}
MyActivity类
public class MainActivity extends AppCompatActivity {
    String urlBitmap = "https://img-my.youkuaiyun.com/uploads/201407/26/1406383265_8550.jpg";
    private ImageView iv;
    private ImageLoader instance;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv = (ImageView) findViewById(R.id.iv);
        instance = ImageLoader.getInstance();
        iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                instance.displayImage(urlBitmap,iv);
            }
        });

    }
}