當應用程序被殺死時使廣播接收器活着

Question

我創建了廣播接收器來檢測來電。 當應用程序處於前台時它工作正常，但在殺死應用程序后停止工作。 所以我使用工作管理器來實現，但它也不起作用。 我不確定我是否正確實施了工作管理器。

請幫助我在應用程序被殺死時讓廣播接收器活着，如果我在獲得結果方面犯了任何錯誤，也建議我正確的方法。

PhoneStateBroadcastReceiver.java

public class PhoneStateBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    telephonyManager.listen(new PhoneStateListener() {
        @Override
        public void onCallStateChanged(int state, String phoneNumber) {
            super.onCallStateChanged(state, phoneNumber);
            try {
                if (state == TelephonyManager.CALL_STATE_RINGING) {
                    Log.e("phoneNumber", phoneNumber);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
     }, PhoneStateListener.LISTEN_CALL_STATE);
   }
 }

電話狀態工作管理器.java

public class PhoneStateWorkManager extends Worker {
PhoneStateBroadcastReceiver phoneStateBroadcastReceiver;

public PhoneStateWorkManager(@NonNull Context context, @NonNull WorkerParameters workerParams) {
    super(context, workerParams);
}

@NonNull
@Override
public Result doWork() {
    if (phoneStateBroadcastReceiver == null) {
        phoneStateBroadcastReceiver = new PhoneStateBroadcastReceiver();
    }
    IntentFilter filter = new IntentFilter(TelephonyManager.ACTION_PHONE_STATE_CHANGED);
    getApplicationContext().registerReceiver(phoneStateBroadcastReceiver, filter);
    return Result.success();
  }
}

主活動.java

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addAutoStartup();
    Constraints constraints = new Constraints
            .Builder()
            .setRequiredNetworkType(NetworkType.NOT_REQUIRED)
            .build();
    WorkRequest phoneStateRequest = new OneTimeWorkRequest
            .Builder(PhoneStateWorkManager.class)
            .setConstraints(constraints)
            .build();
    WorkManager.getInstance(MainActivity.this).enqueue(phoneStateRequest);
}

private void addAutoStartup() {
    try {
        Intent intent = new Intent();
        String manufacturer = android.os.Build.MANUFACTURER;
        if ("xiaomi".equalsIgnoreCase(manufacturer)) {
            intent.setComponent(new ComponentName("com.miui.securitycenter", "com.miui.permcenter.autostart.AutoStartManagementActivity"));
        } else if ("oppo".equalsIgnoreCase(manufacturer)) {
            intent.setComponent(new ComponentName("com.coloros.safecenter", "com.coloros.safecenter.permission.startup.StartupAppListActivity"));
        } else if ("vivo".equalsIgnoreCase(manufacturer)) {
            intent.setComponent(new ComponentName("com.vivo.permissionmanager", "com.vivo.permissionmanager.activity.BgStartUpManagerActivity"));
        } else if ("Letv".equalsIgnoreCase(manufacturer)) {
            intent.setComponent(new ComponentName("com.letv.android.letvsafe", "com.letv.android.letvsafe.AutobootManageActivity"));
        } else if ("Honor".equalsIgnoreCase(manufacturer)) {
            intent.setComponent(new ComponentName("com.huawei.systemmanager", "com.huawei.systemmanager.optimize.process.ProtectActivity"));
        }

        List<ResolveInfo> list = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        if (list.size() > 0) {
            startActivity(intent);
        }
    } catch (Exception e) {
        Log.e("exc", String.valueOf(e));
    }
   }
 }

Answer 1

有兩種方法可以在手機狀態改變時獲取回調： PhoneStateListener和偵聽android.intent.action.PHONE_STATE的BroadcastReceiver 。

我建議根本不使用PhoneStateListener ，而只使用BroadcastReceiver方法，該方法可以通過AndroidManifest設置，即使應用程序當前未處於活動狀態也可以調用它。

請參閱本教程： https : //medium.com/@saishaddai/how-to-know-when-a-device-is-ringing-in-android-57e516d0ab42

請注意，當用戶通過“強制關閉”殺死應用程序時，所有應用程序的廣播接收器都會立即暫停，系統會阻止它們接收未來的廣播，直到用戶手動重新打開該應用程序。

看這里

因此，只要用戶不強制關閉您的應用程序，您就應該能夠接收電話狀態更改。