问题描述
我在broadcast Receiver内部创建了一个Service Class（由于Android broadcast receiver的限制broadcast receiver停了一段时间，所以我创建了Background Service前景Service Notification Android Oreo中的限制= ）。此broadcast Receiver监听电话状态更改 IDLE，OFFHOOK，RINGING 。根据电话呼叫状态的变化（如果呼叫结束），我在游标中获取最后一个呼叫详细信息，并将该详细信息发送到Firebase Realtime Database中。一切工作正常，直到我对saveDatafromCursor()内部的PhonestateListener Class方法发表评论（//）。 （我在保存数据方法之前写了一条Toast消息）。它工作得很好。而且我的服务效果很好。但是如果我取消对saveDatafromCursor()方法的注释，则通话结束后。我的服务停止（通知图标和吐司消息停止。我在真实设备中签入了）。 在不实施服务的情况下，我会将数据发送到运行良好的Firebase ，为什么我尝试将数据保存到Firebase时服务停止？
服务等级
public class HammerService extends Service {
@Override
public void onCreate() {
super.onCreate();
IntentFilter ifilter = new IntentFilter();
ifilter.addAction(android.telephony.TelephonyManager.ACTION_PHONE_STATE_CHANGED);
registerReceiver(receiver,ifilter);
}
@Override
public int onStartCommand(Intent intent,int flags,int startId) {
String input = intent.getStringExtra("inputExtra");
Intent notificationIntent = new Intent(this,MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,notificationIntent,0);
Notification notification = new NotificationCompat.Builder(this,CHANNEL_ID)
.setContentTitle("Hammer Service")
.setContentText(input)
.setSmallIcon(R.drawable.ic_android)
.setContentIntent(pendingIntent)
.build();
startForeground(1,notification);
//do heavy work on a background thread
//stopSelf();
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(receiver);
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
private final broadcastReceiver receiver = new broadcastReceiver() {
@Override
public void onReceive(final Context context,final Intent intent) {
String action = intent.getAction();
if(action.equals("android.provider.Telephony.SMS_RECEIVED")){
//action for sms received
}
else if(action.equals(android.telephony.TelephonyManager.ACTION_PHONE_STATE_CHANGED)){
runfirstTime(context,intent);
}
}
};
private void runfirstTime(Context context,Intent intent) {
TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
MyPhonestateListener customPhoneListener = new MyPhonestateListener();
telephony.listen(customPhoneListener,PhonestateListener.LISTEN_CALL_STATE);
Bundle bundle = intent.getExtras();
String phone_number = bundle.getString("incoming_number");
String stateStr = intent.getExtras().getString(TelephonyManager.EXTRA_STATE);
int state = 0;
if(stateStr.equals(TelephonyManager.EXTRA_STATE_IDLE)){
state = TelephonyManager.CALL_STATE_IDLE;
}
else if(stateStr.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
state = TelephonyManager.CALL_STATE_OFFHOOK;
}
else if(stateStr.equals(TelephonyManager.EXTRA_STATE_RINGING)){
state = TelephonyManager.CALL_STATE_RINGING;
}
if (phone_number == null || "".equals(phone_number)) {
return;
}
customPhoneListener.onCallStateChanged(context,state,phone_number);
}
}
PhonestateListener类
public class MyPhonestateListener extends PhonestateListener {
private static int lastState = TelephonyManager.CALL_STATE_IDLE;
private static Date callStartTime;
private static boolean isIncoming;
static boolean calledAlready = false;
private DatabaseReference databaseReference;
private Context ctx;
public void onCallStateChanged(Context context,int state,String phoneNumber) {
if (lastState == state) {
//No change,debounce extras
return;
}
ctx = context;
System.out.println("Number inside onCallStateChange : " + phoneNumber);
switch (state) {
case TelephonyManager.CALL_STATE_RINGING:
isIncoming = true;
callStartTime = new Date();
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
if (lastState != TelephonyManager.CALL_STATE_RINGING) {
isIncoming = false;
callStartTime = new Date();
}
break;
case TelephonyManager.CALL_STATE_IDLE:
//Went to idle- this is the end of a call. What type depends on prevIoUs state(s)
if (lastState == TelephonyManager.CALL_STATE_RINGING) {
//Ring but no pickup- a miss
waitforlastcalllog();
} else if (isIncoming) {
// Toast.makeText(context,"Incoming " + phoneNumber + " Call time " + callStartTime,Toast.LENGTH_SHORT).show();
waitforlastcalllog();
} else {
// Toast.makeText(context,"outgoing " + phoneNumber + " Call time " + callStartTime +" Date " + new Date(),Toast.LENGTH_SHORT).show();
waitforlastcalllog();
}
break;
}
lastState = state;
}
private void waitforlastcalllog() {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//String deviceMan = android.os.Build.MANUFACTURER;
String deviceMan = Build.MANUFACTURER;
String deviceName=deviceMan.toLowerCase();
if(deviceName.equals("samsung"))
{
// Toast.makeText(ctx,"dvv "+deviceMan,Toast.LENGTH_SHORT).show();
getCallLogs("samsung");
}
else
{
getCallLogs("other");
}
}
},500);
}
private void getCallLogs(String devicename) {
ContentResolver cr = ctx.getContentResolver();
if (ActivityCompat.checkSelfPermission(ctx,Manifest.permission.READ_CALL_LOG) != PackageManager.PERMISSION_GRANTED) {
// Todo: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions,and then overriding
// public void onRequestPermissionsResult(int requestCode,String[] permissions,// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Cursor c = cr.query(CallLog.Calls.CONTENT_URI,null,null);
if (c != null) {
if(devicename.equals("samsung"))
{
if (c.movetoFirst()) { //starts pulling logs from last - you can use movetoFirst() for first logs
getCallDetails(c);
}
}else
{
if (c.movetoLast()) { //starts pulling logs from last - you can use movetoFirst() for first logs
getCallDetails(c);
}
}
c.close();
}
}
private void getCallDetails(Cursor c)
{
int totalCall=1;
for (int j = 0; j < totalCall; j++) {
String call_id = c.getString(c.getColumnIndexOrThrow(CallLog.Calls._ID));
String phNumber = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.NUMBER));
String callDate = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.DATE));
String callDuration = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.DURATION));
Date dateFormat= new Date(Long.valueOf(callDate));
String callDayTimes = String.valueOf(dateFormat);
String callerName = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.CACHED_NAME));
String direction = null;
switch (Integer.parseInt(c.getString(c.getColumnIndexOrThrow(CallLog.Calls.TYPE)))) {
case CallLog.Calls.OUTGOING_TYPE:
direction = "OUTGOING";
break;
case CallLog.Calls.INCOMING_TYPE:
direction = "INCOMING";
break;
case CallLog.Calls.MISSED_TYPE:
direction = "MISSED";
break;
case CallLog.Calls.VOICEMAIL_TYPE:
direction = "VOICEMAIL_TYPE";
break;
case CallLog.Calls.REJECTED_TYPE:
direction = "REJECTED_TYPE";
break;
case CallLog.Calls.BLOCKED_TYPE:
direction = "BLOCKED_TYPE";
break;
case CallLog.Calls.ANSWERED_EXTERNALLY_TYPE:
direction = "ANS EXT TYPE";
break;
default:
break;
}
c.movetoPrevIoUs(); // if you used movetoFirst() for first logs,you should this line to movetoNext
Toast.makeText(ctx,phNumber + callDuration + callDayTimes + direction +callerName,Toast.LENGTH_LONG).show(); // you can use strings in this line
saveDatafromCursor(phNumber,callDuration,callDayTimes,direction,callerName);
}
}
private void saveDatafromCursor(String phNumber,String callDuration,String callDayTimes,String direction,String callername)
{
ModelCursor mc=new ModelCursor();
mc.setPhoneNumber(phNumber);
mc.setCallDuration(callDuration);
mc.setCallDayTimes(callDayTimes);
mc.setDirection(direction);
if(callername==null)
{
callername="Not in Contacts";
}
mc.setCallUsername(callername);
if (!calledAlready) {
FirebaseDatabase.getInstance().setPersistenceEnabled(true);
calledAlready = true;
}
FirebaseDatabase database = FirebaseDatabase.getInstance();
databaseReference = database.getInstance().getReference().child("Call-Details-X");
String key = databaseReference.push().getKey();
String android_id = Settings.Secure.getString(ctx.getContentResolver(),Settings.Secure.ANDROID_ID);
Date date=new Date();
SimpleDateFormat timeStampformatsearch = new SimpleDateFormat("dd-yyyy-MM");
String dateofcall = timeStampformatsearch.format(date);
databaseReference.child(android_id).child(dateofcall).child(key).setValue(mc).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
}
});
}
}
Logcat-错误
2020-08-12 10:03:33.217 5151-5151/com.fooding.callhammer E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.fooding.callhammer,PID: 5151
com.google.firebase.database.DatabaseException: Calls to setPersistenceEnabled() must be made before any other usage of FirebaseDatabase instance.
at com.google.firebase.database.FirebaseDatabase.assertUnfrozen(com.google.firebase:firebase-database@@17.0.0:316)
at com.google.firebase.database.FirebaseDatabase.setPersistenceEnabled(com.google.firebase:firebase-database@@17.0.0:284)
at com.fooding.callhammer.MyPhonestateListener.saveDatafromCursor(MyPhonestateListener.java:214)
at com.fooding.callhammer.MyPhonestateListener.getCallDetails(MyPhonestateListener.java:191)
at com.fooding.callhammer.MyPhonestateListener.getCallLogs(MyPhonestateListener.java:138)
at com.fooding.callhammer.MyPhonestateListener.access$000(MyPhonestateListener.java:26)
at com.fooding.callhammer.MyPhonestateListener$1.run(MyPhonestateListener.java:104)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2020-08-12 10:03:33.446 2016-2122/system_process E/Inputdispatcher: channel '276f02e com.fooding.callhammer/com.fooding.callhammer.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
2020-08-12 10:03:36.556 2016-2197/system_process E/TaskPersister: File error accessing recents directory (directory doesn't exist?).
2020-08-12 10:03:48.799 2016-2041/system_process E/memtrack: Couldn't load memtrack module
2020-08-12 10:03:49.499 2016-2048/system_process E/BatteryExternalStatsWorker: no controller energy info supplied for wifi
2020-08-12 10:04:00.018 2016-2041/system_process E/memtrack: Couldn't load memtrack module
解决方法
摘自文档：服务在其托管过程的主线程中运行；除非另行指定，否则该服务不会创建自己的线程，也不会在单独的进程中运行。您应该在服务内的单独线程上运行任何阻止操作，以避免应用程序无响应（ANR）错误。我认为这就是为什么您不能在Service类中完成“繁重”工作的原因。我没有检查您的代码，但是您可以做两件事：
1。）在创建时在服务中创建新线程，然后执行“繁重的工作”（不要忘记停止它）。 https://developer.android.com/guide/components/services
2。）扩展JobIntentService类，尝试一下。然后覆盖函数onHandleWork（intent），在此开始“繁重的”工作。 https://developer.android.com/reference/androidx/core/app/JobIntentService