我正在尝试从活动更新服务。当用户单击按钮时，活动将数据保存到手机上的sql lite数据库。我想在这里做的是，当单击此按钮时，服务将刷新并使用新数据。
我在按钮上使用了启动/停止服务，但应用程序崩溃并跳过不同的活动。
我认为我的问题类似于Android: Update / Refresh a running service和 Broadcast Receiver within a Service
但是，我没有更新小部件或其他Android原生组件。该服务是一个自定义类。
请注意，广播接收器在手机启动时启动此服务。 此外，Logcat窗口不会滚动读数。它上下颠簸。所以我没有错误日志给你看。
如何创建一个允许服务在用户点击活动按钮时更新的功能？
这是我的活动（按钮位于底部）：
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import org.joda.time.DateTime;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import com.google.android.gcm.demo.app.R;
import com.google.android.gcm.demo.app.EventList.DataView;
import com.google.android.gcm.demo.app.EventList.EventDetails;
import com.google.android.gcm.demo.app.sqllite.DatabaseSqlite;
public class AlertDetails extends Activity {
Integer id;
String name;
String date;
String startTime;
String endTime;
String location;
int alertState;
Bundle bundle;
String alertTime;
String s;
private TextView mTitleDisplay;
private TextView mDateDisplay;
private TextView mTimeDisplay;
private TextView mTimeEndDisplay;
private TextView mLocationDisplay;
private TextView mAlertDisplay;
private String update_alarmTime;
String eventYear;
String eventDay;
String eventMonth;
String eventdate;
Context context;
Intent alarmServiceControl;
DatabaseSqlite entry = new DatabaseSqlite(AlertDetails.this);
// Intent startServiceIntent = new Intent(context, AlarmsService.class);
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.alertview);
bundle = getIntent().getExtras();
id = bundle.getInt("id");
name = bundle.getString("eventName");
date = bundle.getString("date");
startTime = bundle.getString("startTime");
endTime = bundle.getString("endTime");
location = bundle.getString("location");
alertState = bundle.getInt("alertState");
alertTime = bundle.getString("alertTime");
alertTime = "10:00:00";// need to be hooked up correctly to get the right
// capture our View elements
mTitleDisplay = (TextView) findViewById(R.id.titleDisplay);
mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
mTimeDisplay = (TextView) findViewById(R.id.timeDisplay);
mTimeEndDisplay = (TextView) findViewById(R.id.timeEndDisplay);
mLocationDisplay = (TextView) findViewById(R.id.locationDisplay);
mAlertDisplay = (TextView) findViewById(R.id.alertDisplay);
// set start
mTimeDisplay.setText(startTime);
mTimeEndDisplay.setText(endTime);
// set title
mTitleDisplay.setText(name);
// set Date
eventYear = date.substring(0, 4);
eventDay = date.substring(5, 7);
eventMonth = date.substring(8, 10);
mDateDisplay.setText(eventDay + "-" + eventMonth + "-" + eventYear);
eventdate = eventDay + "/" + eventMonth + "/" + eventYear;
// set location
mLocationDisplay.setText(location);
if (alertState == 0) {
entry.open();
mAlertDisplay.setText("Alert is ON and Set to " +entry.getAlert(id));
entry.close();
}
if (alertState == 1) {
mAlertDisplay.setText("Alert is OFF");
}
Button button1 = (Button) findViewById(R.id.btnSetAlert);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (alertState == 0) {
alertState++;
mAlertDisplay.setText("Alert is OFF");
entry.open();
entry.updateAlertState(id, alertState);
entry.close();
} else {
//turn alarm on
entry.open();
mAlertDisplay.setText("Alert is ON and Set to " +entry.getAlert(id));
alertState = 0;
entry.updateAlertState(id, alertState);
entry.close();
}
// TODO check if service is running
stopService(new Intent(AlertDetails.this,
AlarmsService.class));
startService(new Intent(AlertDetails.this,
AlarmsService.class));
Intent intent = new Intent(AlertDetails.this,
AlertView.class);
startActivity(intent);
}
});
}
}
以下是我想要更新的服务：
package com.google.android.gcm.demo.app.Alerts;
import java.util.Calendar;
import java.util.List;
import com.google.android.gcm.demo.app.sqllite.DatabaseSqlite;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class AlarmsService extends Service {
DatabaseSqlite db = new DatabaseSqlite(this);
List<Alerts> listAlerts;
PendingIntent pendingIntent;
String tag = "alerttService";
@Override
public void onCreate() {
super.onCreate();
Toast.makeText(this, "Created from Alerts service ...",
Toast.LENGTH_LONG).show();
Log.i(tag, "Service created...");
}
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("TAG", "started onstart command Created from Alerts service .");
return super.onStartCommand(intent, flags, startId);// START_STICKY;
}
@Override
public void onStart(final Intent intent, int startId) {
super.onStart(intent, startId);
Toast.makeText(this, "Created from Alerts service started...",
Toast.LENGTH_LONG).show();
Log.i(tag, "Service started. ..");
// for looops
Thread thread = new Thread() {
@Override
public void run() {
Boolean x = true;
while (x) {
db.open();
listAlerts = db.getAlarmsForService();
db.close();
int alerts=listAlerts.size();
for (int i = 0; i < alerts; i++) {
Alerts item = listAlerts.get(i);
item.getRowId();
item.getRemoteServerId();
String alertInMills = item.getAlertDateInMills();
String alertDuration = item.getAlertDurationInMinutes();
String eventName = item.getEventName();
// intent.putExtra("eventState", item.getEventState());
// intent.putExtra("startTime", item.getStartTime());
// intent.putExtra("alertState", item.getAlertState());
// intent.putExtra("eventName", item.getEventName());
// intent.putExtra("location", item.getLocation());
// intent.putExtra("alertTime", item.getAlertTime());
// intent.putExtra("date", item.getDate());
long longAlertInMills = Long.parseLong(alertInMills);
pendingIntent = PendingIntent.getService(AlarmsService.this, 0,intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
// go to data base for time in mills
calendar.setTimeInMillis(longAlertInMills);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
pendingIntent);
//
System.out.println(calendar.toString());
}
//
System.out.println("thread");
x = false;
}
}
};
thread.start();
}
@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service destroyed...", Toast.LENGTH_LONG).show();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
BroadCast Receiver：
package com.google.android.gcm.demo.app.Alerts;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class AlarmsBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = "BootReceiver";
Intent startServiceIntent;
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
startServiceIntent = new Intent(context, AlarmsService.class);
context.startService(startServiceIntent);
Log.d("TAG", "alarmBroadcastReceiver");
System.out.println("alarm broadcast ...");
}
}
}