安卓实现随时获取Context（来自《第一行代码》）

首先，定义类：MyApplication

package app.coolwhether.com.zhihu_16_5_31;import android.app.Application;import android.content.Context;/** * Created by Administrator on 2016/6/3. */public class MyApplication extends Application {    private static Context context;    @Override    public void onCreate() {        super.onCreate();        context = getApplicationContext();    }    public static Context getContext(){        return context;    }}

然后在AndroidManifest,

<application    android:name=".MyApplication"

告知系统，程序启动时，初始化MyApplication.

在引用时：即可获取Context。

MyApplication.getContext();