package com.example.testapplication;
import android.app.Application;
import android.content.Context;
/**
 * 编写自己的Application，管理全局状态信息，比如Context
 * @author yy
 *
 */
public class MyApplication extends Application {
  private static Context context;
  @Override
  public void onCreate() {
    //获取Context
    context = getApplicationContext();
  }
  //返回
  public static Context getContextObject(){
    return context;
  }
}

<application
  android:name="com.example.testapplication.MyApplication"
   ....
  >