我的Android应用程序要求在特定时间安排任务。它可以是每日,每周,每月等。因此,当插入输入数据时,如果用户选择“每日”。将有后台服务,每天将插入相同的数据。
我尝试创建服务和相应的接收器类,但看起来服务不会自动运行。有人能告诉我缺少什么吗?
接收者类
public class MyScheduleReceiver extends BroadcastReceiver {
// Restart service every 30 seconds
private static final long REPEAT_TIME = 1000 * 30;
@Override
public void onReceive(Context context, Intent intent) {
AlarmManager service = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, MyStartServiceReceiver.class);
PendingIntent pending = PendingIntent.getBroadcast(context, 0, i,
PendingIntent.FLAG_CANCEL_CURRENT);
Calendar cal = Calendar.getInstance();
// Start 30 seconds after boot completed
cal.add(Calendar.SECOND, 30);
//
// Fetch every 30 seconds
// InexactRepeating allows Android to optimize the energy consumption
service.setInexactRepeating(AlarmManager.RTC_WAKEUP,
cal.getTimeInMillis(), REPEAT_TIME, pending);
// service.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
// REPEAT_TIME, pending);
Toast.makeText(context, "Receving", Toast.LENGTH_SHORT).show();
}
public class MyStartServiceReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent service = new Intent(context, LocalWordService.class);
context.startService(service);
}
}
Android Menifest.xml
<service
android:name=".LocalWordService"
android:label="LocalWordService" >
</service>
<receiver android:name="MyScheduleReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name="MyStartServiceReceiver" >
</receiver>
现在当我启动应用程序时,我调用一个活动类,它基本上使用下面的代码调用服务......但是每30秒就没有发生任何事情。
Intent mServiceIntent = new Intent(this, LocalWordService.class);
startService(mServiceIntent);
服务类
public class LocalWordService extends Service {
private final IBinder mBinder = new MyBinder();
private ArrayList<String> list = new ArrayList<String>();
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Starting", Toast.LENGTH_SHORT).show();
Random random = new Random();
if (random.nextBoolean()) {
list.add("Linux");
}
if (random.nextBoolean()) {
list.add("Android");
}
if (random.nextBoolean()) {
list.add("iPhone");
}
if (random.nextBoolean()) {
list.add("Windows7");
}
if (list.size() >= 20) {
list.remove(0);
}
return Service.START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent arg0) {
return mBinder;
}
public class MyBinder extends Binder {
LocalWordService getService() {
return LocalWordService.this;
}
}
public List<String> getWordList() {
return list;
}
}
请建议,缺少什么?
答案 0 :(得分:3)
Current Alarm Manager state:
Realtime wakeup (now=2013-02-27 20:32:52):
RTC_WAKEUP #1: Alarm{412e05f0 type 0 com.android.providers.calendar}
type=0 when=+20h57m39s289ms repeatInterval=0 count=0
operation=PendingIntent{412e05e0: PendingIntentRecord{412e04f0 com.androi
roviders.calendar broadcastIntent}}
RTC_WAKEUP #0: Alarm{41566480 type 0 android}
type=0 when=+10h56m12s700ms repeatInterval=3725515 count=0
operation=PendingIntent{4162dbc0: PendingIntentRecord{41591808 android br
castIntent}}
RTC #1: Alarm{41532120 type 1 android}
type=1 when=+22h27m7s419ms repeatInterval=0 count=0
operation=PendingIntent{4154e7c8: PendingIntentRecord{415adb68 android br
castIntent}}
RTC #0: Alarm{414eb330 type 1 com.android.calendar}
type=1 when=+3h27m7s419ms repeatInterval=0 count=0
operation=PendingIntent{414eb320: PendingIntentRecord{4166c020 com.androi
alendar broadcastIntent}}
Elapsed realtime wakeup (now=+1h5m9s472ms):
ELAPSED_WAKEUP #1: Alarm{415608e0 type 2 android}
type=2 when=+56m18s779ms repeatInterval=0 count=0
operation=PendingIntent{412fbbc0: PendingIntentRecord{412d26f0 android br
castIntent}}
ELAPSED_WAKEUP #0: Alarm{41b31c20 type 2 com.android.phone}
type=2 when=+21s200ms repeatInterval=0 count=0
operation=PendingIntent{41b31c10: PendingIntentRecord{4163fea8 com.androi
hone broadcastIntent}}
ELAPSED #3: Alarm{41b21d40 type 3 android}
type=3 when=+22h57m0s588ms repeatInterval=0 count=0
operation=PendingIntent{41567800: PendingIntentRecord{41b61370 android br
castIntent}}
ELAPSED #2: Alarm{41b792e8 type 3 android}
type=3 when=+9m50s528ms repeatInterval=1800000 count=1
operation=PendingIntent{415af0b0: PendingIntentRecord{41b791c0 android br
castIntent}}
ELAPSED #1: Alarm{415d6648 type 3 android}
type=3 when=+7m30s477ms repeatInterval=0 count=0
operation=PendingIntent{415652b0: PendingIntentRecord{41bba838 android br
castIntent}}
ELAPSED #0: Alarm{417b4448 type 3 android}
type=3 when=+7s294ms repeatInterval=0 count=0
operation=PendingIntent{4162f708: PendingIntentRecord{415c23a0 android br
castIntent}}
Broadcast ref count: 0
Alarm Stats:
android
20685ms running, 0 wakeups
65 alarms: act=android.intent.action.TIME_TICK flg=0x40000014
2 alarms: act=com.android.server.action.NETWORK_STATS_POLL flg=0x14
6 alarms: act=com.android.server.ThrottleManager.action.POLL flg=0x14
1 alarms: act=com.android.server.NetworkTimeUpdateService.action.POLL flg
14
com.android.providers.calendar
8935ms running, 1 wakeups
1 alarms: act=com.android.providers.calendar.intent.CalendarProvider2 flg
14
com.android.phone
2632ms running, 63 wakeups
63 alarms: act=com.android.internal.telephony.gprs-data-stall flg=0x14
答案 1 :(得分:0)
我做了一个教程,描述了它是如何工作的(所有代码都是可下载和描述的)。也许它可以帮到你。注意,用法语!
答案 2 :(得分:0)
创建服务的简单方法。
将类名称创建为DocService
import java.io.File;
import java.util.ArrayList;
import android.app.Service;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.os.ResultReceiver;
import backup.PostFile;
public class DocService extends Service{
Intent intent;
ArrayList<File>fileList;
String fileType;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@SuppressWarnings("deprecation")
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
this.intent = intent;
fileList = new ArrayList<File>();
//new PostFile().execute();
if(intent.hasExtra("doc"))
{
fileType = intent.getStringExtra("doc");
new PostDocFileThread().start();
}
}
class PostDocFileThread extends Thread
{
public void run()
{
try
{
Thread.sleep(5000);
//Do your Stuff here.
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
然后在调用服务的活动中
public class MainActivity extends Activity {
static Button docBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
docBtn = (Button)findViewById(R.id.backup_documents);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void onBackupDocumentClick(View v)
{
//new BackupDocument().execute();
docBtn.setEnabled(false);
Intent i = new Intent("com.example.backuprestore.DocService");
i.putExtra("doc", "doc");
i.putExtra("resReceiver", theReceiver);
startService(i);
Toast.makeText(getApplicationContext(), "Backup process has been started in background.",Toast.LENGTH_LONG).show();
}
}
And Finally declare your service in AndroidManifest XML
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.backuprestore.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<service android:name="com.example.backuprestore.DocService" >
<intent-filter>
<action android:name="com.example.backuprestore.DocService" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</service>
</application>