如何在通知上显示我的计时器？我有一个应用程序启动用户指定的计时器，我想在通知上显示计时器。我使用服务来运行我的计时器，即使我的应用程序已关闭，我使用SharedPreference传递用户设置为服务的持续时间。
这是我的代码： 第2页（片段）
public class page2 extends Fragment {
private static final String TAG = "page2";
private Button btntest;
private TextView timer,tv;
private Spinner spinner, spinner2;
public int hours, mins, duration;
private Vibrator v;
private static int myVariable;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.page2_fragment,container,false);
btntest = (Button) view.findViewById(R.id.button2);
timer = (TextView) view.findViewById(R.id.Timer);
tv = (TextView) view.findViewById(R.id.textView3);
//setting up 2 spinners
spinner = (Spinner) view.findViewById(R.id.spinner1);
String [] values = {"00","01","02","03","04","05","06"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner.setAdapter(adapter);
spinner2 = (Spinner) view.findViewById(R.id.spinner2);
String [] values2 = {"00","01","10","20","30","40","50","60"};
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values2);
adapter2.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner2.setAdapter(adapter2);
//button start
btntest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String spin=spinner.getSelectedItem().toString();
hours = Integer.parseInt(spin);
hours = hours*3600000;
String spin2=spinner2.getSelectedItem().toString();
mins = Integer.parseInt(spin2);
mins = mins*60000;
duration = hours+mins;
setParam(duration);
startService(duration);
}
});
return view;
}
//timer part
public void setParam(int param){
CountDownTimer countDownTimer = new CountDownTimer(param, 1000) {
@Override
public void onTick(long param) {
long millis= param;
String hms= String.format("%02d:%02d:%02d",
TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis))
//seconds
,TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))
);
timer.setText(hms);
}
@Override
public void onFinish() {
timer.setText("00:00");
}
};
countDownTimer.start();
}
//saving data and passing intent to service
public void startService(int duration)
{
int d = duration;
SharedPreferences sharedPreferences = getActivity().getSharedPreferences("Timer", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putInt("duration", d);
editor.apply();
Intent intent = new Intent(getActivity(),MyService.class);
getActivity().startService(intent);
Toast.makeText(getActivity(), "Intent passed and preferences saved!"+d,Toast.LENGTH_SHORT).show();
}
}
MyService.java
public class MyService extends Service {
private Vibrator v;
//private static Timer timer = new Timer();
NotificationCompat.Builder notification;
private static final int uniqueID = 71399;
@Override
public void onCreate() {
super.onCreate();
notification = new NotificationCompat.Builder(this);
notification.setAutoCancel(true);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
SharedPreferences sharedPreferences = getSharedPreferences("Timer", Context.MODE_PRIVATE);
int dur = sharedPreferences.getInt("duration", 0);
CountDownTimer countDownTimer = new CountDownTimer(dur, 1000) {
@Override
public void onTick(long param) {
}
@Override
public void onFinish() {
long n[] = {1,1000,500,1000,500,1000,500,1000,500,1000,500,1000,500,1000,500,1000,500,1000};
v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(n, -1);
startnotif();
onDestroy();
}
};
countDownTimer.start();
return START_STICKY;
}
public void onDestroy() {
stopSelf();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
//notification
public void startnotif()
{
notification.setSmallIcon(R.mipmap.ic_launcher);
notification.setTicker("apps are now unblocked!");
notification.setWhen(System.currentTimeMillis());
notification.setContentTitle("You survived!");
notification.setContentText("Apps are now unblocked!");
Intent intent1 = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
notification.setContentIntent(pendingIntent);
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nm.notify(uniqueID, notification.build());
}
}
答案 0 :(得分：1)
您可以使用在创建通知之前指定的唯一通知ID来更新通知。
循环你的计时器（例如，从你的例子中的共享偏好中减去一个初始值的计数器）并循环每一次减量并更新通知，如：
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
int numMessages = 0;
mNotifyBuilder.setContentText(String.valueOf(timerValue)) // <-- your timer value
.setNumber(++numMessages);
// Because the ID remains unchanged, the existing notification is
// updated.
mNotificationManager.notify(
notifyID, // <-- Place your notification id here
mNotifyBuilder.build());
示例已从官方文档修改：Update Notifications in Android
答案 1 :(得分：0)
像你一样从共享偏好中获取持续时间。
int dur = sharedPreferences.getInt("duration", 0);
现在您可以通过将“dur”的值传递给setContentText来显示计时器。
notification.setContentText("Apps are now unblocked!"+dur);
答案 2 :(得分：0)