package com.example.skotc.servicedemo;import android.app.Application;
import android.content.Context;
/*** Created by skotc on 2018/8/20.*/
public class MyApplication extends Application {private static Context context;@Overridepublic void onCreate() {super.onCreate();context = getApplicationContext();}public static Context getContext() {return context;}
}

 <applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:supportsRtl="true"android:theme="@style/AppTheme"android:name=".MyApplication"><activityandroid:name=".ServiceMainActivity"android:label="@string/app_name"android:theme="@style/AppTheme.NoActionBar"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity>
</application>

class person implements Serializable{private String name;private int age;public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public int getAge() {return age;}
}

person zhangxu = new person();
zhangxu.setAge(18);
zhangxu.setName("tiancia");//传递
Intent intent = new Intent(ServiceMainActivity.this,SecondActivity.class);
intent.putExtra("person", zhangxu);
startActivity(intent);
// 获取
person zhangxu2 = (person) getIntent().getSerializableExtra("person");

/*
*
* 实现Parcelable接口
* 就要重写里面的两个方法
* describeContents
* writeToParcel
*
* */class person implements Parcelable{private String name;private int age;public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public int getAge() {return age;}@Overridepublic int describeContents() {return 0;}// 把数据写入到parcel中 @Overridepublic void writeToParcel(Parcel parcel, int i) {parcel.writeString(name);parcel.writeInt(age);}// 我们还必须在person类中创建一个CREATOR常量，这里创建了一个Parcelable.Creator接口的实现// 并且将泛型类型指定为person,接着重写里面的两个方法// createFromParcel  这个方法中读取刚才存入的字段// newArray          public static final Parcelable.Creator<person>CREATOR = new Parcelable.Creator<person>(){@Overridepublic person createFromParcel(Parcel parcel) {person person = new person();       // 读取数据person.name = parcel.readString();person.age = parcel.readInt();return person;}@Overridepublic person[] newArray(int i) {return new person[i];}};
}

class LogUntil{public static final  int VERBOSE  = 1;public static final  int DEBUG  = 2;public static final  int INFO  = 3;public static final  int WARN  = 4;public static final  int ERROR  = 5;public static final  int NOTHING  = 6;public static final  int leven  = VERBOSE;public static void v(String tag,String msg){if (leven<=VERBOSE){Log.d(tag,msg);}}public static void d(String tag,String msg){if (leven<=DEBUG){Log.d(tag,msg);}}public static void i(String tag,String msg){if (leven<=INFO){Log.d(tag,msg);}}public static void w(String tag,String msg){if (leven<=WARN){Log.d(tag,msg);}}public static void e(String tag,String msg){if (leven<=ERROR){Log.d(tag,msg);}}
}

class LongRunningService extends Service{@Nullable@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {new Thread(new Runnable() {@Overridepublic void run() {}}).start();// 获取AlarmManager对象AlarmManager manager = (AlarmManager)getSystemService(ALARM_SERVICE);// 一个小时的毫秒数int anHour = 60*60*1000;// SystemClock.elapsedRealtime方法表示系统开机至今经历的毫秒数// SystemClock.currentTimeMillis方法表示获取1970年1月1日零时至今所经历的毫秒数long triggerAtTime = SystemClock.elapsedRealtime()+anHour;// 指定处理定时任务的服务为LongRunningService 最后在调用set方法Intent i = new Intent(this,LongRunningService.class);PendingIntent pendingIntent = PendingIntent.getService(this,0,i,0);//AlarmManager.ELAPSED_REALTIME_WAKEUP 表示让定时任务的触发时间从系统开机算起，但是会唤醒CPU//AlarmManager.ELAPSED_REALTIME 表示让定时任务的触发时间从系统开机算起，但是不会唤醒CPU//AlarmManager.RTC          表示让定时任务的触发时间从1970,1,1算起，但是不会唤醒CPU//AlarmManager.RTC_WAKEUP   表示让定时任务的触发时间从1970,1,1算起，但是会唤醒CPU//triggerAtTime 时间manager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,triggerAtTime,pendingIntent);return super.onStartCommand(intent, flags, startId);}
}

 <activity android:name=".SecondActivity"android:configChanges="orientation|keyboardHidden|screenSize|screenLayout"></activity>

android:screenOrientation="portrait"