我已按照http://developer.android.com/training/notify-user/index.html
中的教程进行操作效果很好。但我想要的是：当我点击ping时，旧服务将停止，然后再次创建服务。因此，如果我多次点击id，它只会通知我一次。
问题：如果我设定时间10，那么我点击＆＃34; Ping＆＃34;按钮。然后在5秒后，我再次点击它。它会通知我两次。
我想要的：如果我设定时间10，那么我点击＆＃34; Ping＆＃34;按钮。然后在5秒后，我点击它，它将只通知一次，最后一次点击按钮后10秒钟。
public class MainActivity extends Activity {
private Intent mServiceIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Creates an explicit Intent to start the service that constructs and
// issues the notification.
mServiceIntent = new Intent(getApplicationContext(), PingService.class);
}
/*
* Gets the values the user entered and adds them to the intent that will be
* used to launch the IntentService that runs the timer and issues the
* notification.
*/
public void onPingClick(View v) {
stopCurrentService();
int seconds;
// Gets the reminder text the user entered.
EditText msgText = (EditText) findViewById(R.id.edit_reminder);
String message = msgText.getText().toString();
mServiceIntent.putExtra(CommonConstants.EXTRA_MESSAGE, message);
mServiceIntent.setAction(CommonConstants.ACTION_PING);
Toast.makeText(this, R.string.timer_start, Toast.LENGTH_SHORT).show();
// The number of seconds the timer should run.
EditText editText = (EditText) findViewById(R.id.edit_seconds);
String input = editText.getText().toString();
if (input == null || input.trim().equals("")) {
// If user didn't enter a value, sets to default.
seconds = R.string.seconds_default;
} else {
seconds = Integer.parseInt(input);
}
int milliseconds = (seconds * 1000);
mServiceIntent.putExtra(CommonConstants.EXTRA_TIMER, milliseconds);
// Launches IntentService "PingService" to set timer.
startService(mServiceIntent);
}
private void stopCurrentService() {
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
List<ActivityManager.RunningServiceInfo> serviceList = activityManager
.getRunningServices(Integer.MAX_VALUE);
if (serviceList.size() <= 0) { }
int size = serviceList.size();
for (int i = 0; i < size; i++) {
RunningServiceInfo serviceInfo = serviceList.get(i);
ComponentName serviceName = serviceInfo.service;
if (serviceName.getClassName().equals(PingService.class.getName())) {
try {
Intent intentstop = new Intent();
intentstop.setComponent(serviceName);
getApplicationContext().stopService(intentstop);
} catch (SecurityException e) {
e.printStackTrace();
}
}
}
}
}
PingService创建一个包含2个按钮的通知：一个用于暂停 通知，一个解雇它。
public class PingService extends IntentService {
private NotificationManager mNotificationManager;
private String mMessage;
private int mMillis;
NotificationCompat.Builder builder;
private boolean status;
public PingService() {
// The super call is required. The background thread that IntentService
// starts is labeled with the string argument you pass.
super("com.example.android.pingme");
}
@Override
protected void onHandleIntent(Intent intent) {
// The reminder message the user set.
mMessage = intent.getStringExtra(CommonConstants.EXTRA_MESSAGE);
// The timer duration the user set. The default is 10 seconds.
mMillis = intent.getIntExtra(CommonConstants.EXTRA_TIMER,
CommonConstants.DEFAULT_TIMER_DURATION);
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
String action = intent.getAction();
// This section handles the 3 possible actions:
// ping, snooze, and dismiss.
if (action.equals(CommonConstants.ACTION_PING)) {
issueNotification(intent, mMessage);
} else if (action.equals(CommonConstants.ACTION_SNOOZE)) {
nm.cancel(CommonConstants.NOTIFICATION_ID);
Log.d(CommonConstants.DEBUG_TAG, getString(R.string.snoozing));
// Sets a snooze-specific "done snoozing" message.
issueNotification(intent, getString(R.string.done_snoozing));
} else if (action.equals(CommonConstants.ACTION_DISMISS)) {
nm.cancel(CommonConstants.NOTIFICATION_ID);
}
}
private void issueNotification(Intent intent, String msg) {
mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Sets up the Snooze and Dismiss action buttons that will appear in the
// expanded view of the notification.
Intent dismissIntent = new Intent(this, PingService.class);
dismissIntent.setAction(CommonConstants.ACTION_DISMISS);
PendingIntent piDismiss = PendingIntent.getService(this, 0,
dismissIntent, 0);
Intent snoozeIntent = new Intent(this, PingService.class);
snoozeIntent.setAction(CommonConstants.ACTION_SNOOZE);
PendingIntent piSnooze = PendingIntent.getService(this, 0,
snoozeIntent, 0);
// Constructs the Builder object.
builder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_stat_notification)
.setTicker("Ping ! ping ! PIng!")
.setContentTitle(getString(R.string.notification))
.setContentText(getString(R.string.ping))
.setDefaults(Notification.DEFAULT_ALL)
// requires VIBRATE permission
/*
* Sets the big view "big text" style and supplies the text (the
* user's reminder message) that will be displayed in the detail
* area of the expanded notification. These calls are ignored by
* the support library for pre-4.1 devices.
*/
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.addAction(R.drawable.ic_stat_dismiss,
getString(R.string.dismiss), piDismiss)
.addAction(R.drawable.ic_stat_snooze,
getString(R.string.snooze), piSnooze);
/*
* Clicking the notification itself displays ResultActivity, which
* provides UI for snoozing or dismissing the notification. This is
* available through either the normal view or big view.
*/
Intent resultIntent = new Intent(this, ResultActivity.class);
resultIntent.putExtra(CommonConstants.EXTRA_MESSAGE, msg);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
// Because clicking the notification opens a new ("special") activity,
// there's
// no need to create an artificial back stack.
PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0,
resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(resultPendingIntent);
startTimer(mMillis);
}
// Starts the timer according to the number of seconds the user specified.
private void startTimer(int millis) {
Log.d(CommonConstants.DEBUG_TAG, getString(R.string.timer_start));
try {
Thread.sleep(millis);
} catch (InterruptedException e) {
Log.d(CommonConstants.DEBUG_TAG, getString(R.string.sleep_error));
}
Log.d(CommonConstants.DEBUG_TAG, getString(R.string.timer_finished));
issueNotification(builder);
}
private void issueNotification(NotificationCompat.Builder builder) {
mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Including the notification ID allows you to update the notification
// later on.
mNotificationManager.notify(CommonConstants.NOTIFICATION_ID,
builder.build());
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
我已经调用了stopService（），但旧的通知再次出现。
我想要的是它会在最后一次点击后10秒通知我一次。
答案 0 :(得分：0)
您可以使用处理程序来停止/启动您的服务。 请看我的代码。它与您的代码并不完全相关，但您可以理解。 Click this link
您可以在Runnable的Run方法中进行检查。