在IntentService类中收到一个意图

Question

我有一个复选框列表，用户选择一些项目，然后我在json格式中封装他的选择，随后我从alarmManager发射json字符串，然后试图将其发送到GetLLRD IntentService类，但我面临的问题是，我没有在GetLLRD类中接收意图，因为我没有在GetLLRD类中获得任何输出。

我该如何修复它?

MainActivity:

                Intent intentJson = new Intent(MainActivity.this, GetLLRD.class);
                intentJson.putExtra("json_data", json);
                PendingIntent pintent = PendingIntent.getService(getApplicationContext(), 3, intentJson, 0);
                AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
                Calendar cal = Calendar.getInstance();
                alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                        5 * 1000, pintent);
                System.out.println("test intentJson output: " +intentJson);
                startService(intentJson);

GetLLRD类:

public class GetLLRD extends IntentService {
    public GetLLRD(String name) {
        super(name);
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        String jSONString = intent.getStringExtra("json_data");
        System.out.println("test json is " + jSONString);
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        String jSONString = intent.getStringExtra("json_data");
        System.out.println("Test" + jSONString);
        if(jSONString != null){
            System.out.println("Test");
        }
    }
}

Answer 1

你必须在pending intent中注册广播接收器。你可能在服务中创建挂起意图是错误的。为了得到通知从报警管理器我们需要使用广播接收器。

注册AlarmManager

        int REQUEST_CODE= 0;
        Calendar calendar = Calendar.getInstance();
        int hour = 13;
        int minute = 00;
        calendar.set(Calendar.HOUR_OF_DAY, hour);//24 Hour format
        calendar.set(Calendar.MINUTE, minute);
        calendar.set(Calendar.SECOND, 00);
        /*calendar.set(Calendar.AM_PM, peried.equalsIgnoreCase("AM") ? Calendar.AM : Calendar.PM);*/
        Intent myIntent = new Intent(context, MyReceiver.class);
        myIntent.putExtra("json_data", json);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                    5 * 1000, pendingIntent );

接收机

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        try {
            String action = intent.getStringExtra("json_data");
            new ShowToast(context, action);
            if (action.length() > 1) {
                    startService(context, action);
            }
        } catch (Exception e) {
        }
    }
    public void startService(Context context, String action) {
        Intent service1 = new Intent(context, GetLLRD.class);
        service1.putExtra("json_data", action);
        context.startService(service1);
    }
}

在manifest中注册receiver并请求使用AlarmManager权限

<uses-permission android:name="android.permission.WAKE_LOCK" />
<receiver android:name=".MyReceiver" />