我希望在手机响铃时停止正在运行的服务，我想在接听电话或振铃后重启服务。
如果电话结束，我总是得到一个java.lang.NullPointerException。 在CALL_STATE_RINGING中，alarmManager取消，服务停止，没有任何错误。再次启动服务，不起作用。我总是在NullPointerException之后得到。
03-18 19:08:30.280 15795-15795/de.app.test E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: de.app.test, PID: 15795
java.lang.RuntimeException: Unable to start service de.app.AppService@430fad88 with Intent { flg=0x4 cmp=de.ring.volume/de.ring.AppService (has extras) }: java.lang.NullPointerException
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2767)
at android.app.ActivityThread.access$2100(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:212)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at de.app.AppService.play(AppService.java:724)
at de.app.AppService.onStartCommand(AppService.java:159)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2750)
at android.app.ActivityThread.access$2100(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:212)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
at dalvik.system.NativeStart.main(Native Method)
03-18 19:08:34.970 15795-15795/de.app.test I/Process﹕ Sending signal. PID: 15795 SIG: 9
03-18 19:08:44.560 16362-16362/de.app.test I/dalvikvm﹕ Enabling JNI app bug workarounds for target SDK version 8...
03-18 19:08:44.620 16362-16362/de.app.test D/AppService﹕ SavePreferencesInt: 0
03-18 19:08:44.620 16362-16362/de.app.test D/AppService﹕ SavePreferencesInt: 0
03-18 19:08:44.630 16362-16362/de.app.test D/AppService﹕ SavePreferencesInt: 0
03-18 19:08:44.630 16362-16362/de.app.test D/AppService﹕ LoadPreferences: 2
03-18 19:08:44.630 16362-16362/de.app.test I/de.app.AppService﹕ play() Method
03-18 19:08:44.630 16362-16362/de.app.test D/AndroidRuntime﹕ Shutting down VM
03-18 19:08:44.630 16362-16362/de.app.test W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41685d88)
03-18 19:08:44.640 16362-16362/de.app.test E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: de.app.test, PID: 16362
java.lang.RuntimeException: Unable to start service de.app.AppService@42ef56f0 with Intent { flg=0x4 cmp=de.app.test/de.app.AppService (has extras) }: java.lang.NullPointerException
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2767)
at android.app.ActivityThread.access$2100(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:212)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at de.app.AppService.play(AppService.java:724)
at de.app.AppService.onStartCommand(AppService.java:159)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2750)
at android.app.ActivityThread.access$2100(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:212)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
at dalvik.system.NativeStart.main(Native Method)
代码：
public class IncomingCall extends BroadcastReceiver {
TelephonyManager telephony;
static MyPhoneStateListener phoneListener;
public static Boolean phoneRinging = false;
static String phoneNumber;
public void onReceive(Context context, Intent intent) {
MyPhoneStateListener phoneListener = new MyPhoneStateListener(context);
telephony = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
telephony.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);
}
public class MyPhoneStateListener extends PhoneStateListener {
private Context context;
MyPhoneStateListener(Context c) {
super();
context = c;
}
public void onCallStateChanged(int state, String incomingNumber) {
phoneNumber = incomingNumber;
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, AppService.class);
PendingIntent pi = PendingIntent.getService(context, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
switch (state) {
case TelephonyManager.CALL_STATE_IDLE:
Log.d("DEBUG", "IDLE" + incomingNumber);
//phoneRinging = false;
startAppService(context);
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
Log.d("DEBUG", "OFFHOOK" + incomingNumber);
//phoneRinging = false;
startAppService(context);
break;
case TelephonyManager.CALL_STATE_RINGING:
Log.d("DEBUG", "RINGING" + incomingNumber);
phoneRinging = true;
alarmManager.cancel(pi);
context.stopService(new Intent(context, AppService.class));
break;
}
}
}
public void onDestroy() {
telephony.listen(phoneListener, PhoneStateListener.LISTEN_NONE);
}
public void startAppService(Context c){
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(c);
Intent i = new Intent(c, AppService.class);
PendingIntent pi = PendingIntent.getService(c, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) c.getSystemService(Context.ALARM_SERVICE);
byte[] time_night = new byte[]{22, 0, 6, 0};
boolean tB_Mo_i = sharedPreferences.getBoolean("TB_MO", true);
boolean tB_Di_i = sharedPreferences.getBoolean("TB_DI", true);
boolean tB_Mi_i = sharedPreferences.getBoolean("TB_MI", true);
boolean tB_Do_i = sharedPreferences.getBoolean("TB_DO", true);
boolean tB_Fr_i = sharedPreferences.getBoolean("TB_FR", false);
boolean tB_Sa_i = sharedPreferences.getBoolean("TB_SA", false);
boolean tB_So_i = sharedPreferences.getBoolean("TB_SO", true);
time_night[0] = (byte) sharedPreferences.getInt("TIME_NIG_H_FROM", 0);
time_night[1] = (byte) sharedPreferences.getInt("TIME_NIG_MIN_FROM", 0);
time_night[2] = (byte) sharedPreferences.getInt("TIME_NIG_H_TO", 0);
time_night[3] = (byte) sharedPreferences.getInt("TIME_NIG_MIN_TO", 0);
i.putExtra(AppService.CHKBOX_ACT_CAL, sharedPreferences.getBoolean("RB_ACT_CAL", true));
i.putExtra(AppService.CHKBOX_ACT_LOUD, sharedPreferences.getBoolean("RB_ACT_MIN", false));
i.putExtra(AppService.CHKBOX_ACT_NIGHT, sharedPreferences.getBoolean("CB_ACT_NIGHT", false));
i.putExtra(AppService.TIME, sharedPreferences.getInt("TIME_NEXT", 0));
i.putExtra(AppService.TIME_NOW, sharedPreferences.getLong("TIME_NOW_SAVE", 0));
i.putExtra(AppService.TEXT, sharedPreferences.getString("TEXT", ""));
i.putExtra(AppService.TIME_NIGHT, time_night);
int update_time = 15;
try {
update_time = Integer.valueOf(sharedPreferences.getString("pref_settings_update_time", "15"));
} catch (Exception e) {
}
alarmManager.cancel(pi);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * update_time, pi);
}
}
服务：
public int onStartCommand(Intent intent, int flags, int startId) {
set_calendar = intent.getBooleanExtra(CHKBOX_ACT_CAL, true);
set_Loud_sil = intent.getBooleanExtra(CHKBOX_ACT_LOUD, true);
set_night_mode = intent.getBooleanExtra(CHKBOX_ACT_NIGHT, true);
time_loud = intent.getIntExtra(TIME, 0);
displ_text=intent.getStringExtra(TEXT);
play(displ_text);
run();
return(START_REDELIVER_INTENT);
}
private void play(String text) {
if (!isPlaying) {
if(D) Log.i(getClass().getName(), "play() Method");
isPlaying=true;
int time_from_min = time_night[0] * 60 + time_night[1];
int time_to_min = time_night[2] * 60 + time_night[3];
note=new Notification(R.drawable.app_status,
text, System.currentTimeMillis());
i=new Intent(this, Activity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|
Intent.FLAG_ACTIVITY_SINGLE_TOP);
pi=PendingIntent.getActivity(this, 0, i, 0);
note.setLatestEventInfo(this, getString(R.string.app_name),text,pi);
note.flags|=Notification.FLAG_NO_CLEAR;
if(show_notification)startForeground(1505, note);
}
}
修改
如果我将onCallStateChanged更改为以下内容，则可以启动该服务。那么如何停止服务和alarmManager ???
public void onCallStateChanged(int state, String incomingNumber) {
/* Intent i=new Intent(context, AppService.class);
PendingIntent pi = PendingIntent.getService(context, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);*/
switch (state) {
case TelephonyManager.CALL_STATE_IDLE:
Log.d("DEBUG", "IDLE" + incomingNumber);
//phoneRinging = false;
if(!isServiceRunning(context)) {
startAppService(context);
}
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
Log.d("DEBUG", "OFFHOOK" + incomingNumber);
//phoneRinging = false;
if(!isServiceRunning(context)) {
}
break;
case TelephonyManager.CALL_STATE_RINGING:
Log.d("DEBUG", "RINGING" + incomingNumber);
phoneRinging = true;
// alarmManager.cancel(pi);
// context.stopService(new Intent(context, AppService.class));
break;
}
}
答案 0 :(得分：0)
解决方案：
public void startAppService(Context c, boolean stop){
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(c);
Intent i = new Intent(c, AppService.class);
AlarmManager alarmManager = (AlarmManager) c.getSystemService(Context.ALARM_SERVICE);
byte[] time_night = new byte[]{22, 0, 6, 0};
boolean tB_Mo_i = sharedPreferences.getBoolean("TB_MO", true);
boolean tB_Di_i = sharedPreferences.getBoolean("TB_DI", true);
boolean tB_Mi_i = sharedPreferences.getBoolean("TB_MI", true);
boolean tB_Do_i = sharedPreferences.getBoolean("TB_DO", true);
boolean tB_Fr_i = sharedPreferences.getBoolean("TB_FR", false);
boolean tB_Sa_i = sharedPreferences.getBoolean("TB_SA", false);
boolean tB_So_i = sharedPreferences.getBoolean("TB_SO", true);
time_night[0] = (byte) sharedPreferences.getInt("TIME_NIG_H_FROM", 0);
time_night[1] = (byte) sharedPreferences.getInt("TIME_NIG_MIN_FROM", 0);
time_night[2] = (byte) sharedPreferences.getInt("TIME_NIG_H_TO", 0);
time_night[3] = (byte) sharedPreferences.getInt("TIME_NIG_MIN_TO", 0);
if (stop){
PendingIntent pi = PendingIntent.getService(context, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.cancel(pi);
context.stopService(new Intent(context, AppService.class));
}else {
i.putExtra(AppService.CHKBOX_ACT_CAL, sharedPreferences.getBoolean("RB_ACT_CAL", true));
i.putExtra(AppService.CHKBOX_ACT_LOUD, sharedPreferences.getBoolean("RB_ACT_MIN", false));
i.putExtra(AppService.CHKBOX_ACT_NIGHT, sharedPreferences.getBoolean("CB_ACT_NIGHT", false));
i.putExtra(AppService.TIME, sharedPreferences.getInt("TIME_NEXT", 0));
i.putExtra(AppService.TIME_NOW, sharedPreferences.getLong("TIME_NOW_SAVE", 0));
i.putExtra(AppService.TEXT, sharedPreferences.getString("TEXT", ""));
i.putExtra(AppService.TIME_NIGHT, time_night);
PendingIntent pi = PendingIntent.getService(c, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
int update_time = 15;
try {
update_time = Integer.valueOf(sharedPreferences.getString("pref_settings_update_time", "15"));
} catch (Exception e) {
}
alarmManager.cancel(pi);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * update_time, pi);
}
}