问题描述

android：将两个类合并到一个activity中有什么合适的方法？

我有两个类，一个是MainActivity扩展了activity，另外一个是AlarmReceiver扩展了BroadcastReceiver。我怎么能够消除AlarmReceiver，而是在MainActivity实现这个功能？我知道不可能同时扩展两个类，所以我想知道最好的方法应该是什么？

MainActivity

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        scheduleNextUpdate();         Streamer str = new Streamer();            Calendar calendar = str.getIcs();        int x = 1;        LinearLayout layout = (LinearLayout)findViewById(R.id.layout);        for (Iterator i = calendar.getComponents().iterator(); i.hasNext();) {            Component component = (Component) i.next();            TextView tv_1 = new TextView(this);            layout.addView(tv_1);            tv_1.setText(""Component "" + x);            x++;;            for (Iterator j = component.getProperties().iterator(); j.hasNext();) {                Property property = (Property) j.next();                TextView tv_2 = new TextView(this);                layout.addView(tv_2);                tv_2.setText(property.getName() + "": "" + property.getValue());            }        }    }    public void scheduleNextUpdate()      {        Intent intent = new Intent(MainActivity.thisAlarmReceiver.class);        PendingIntent pendingIntent =            PendingIntent.getBroadcast(this 0 intent PendingIntent.FLAG_UPDATE_CURRENT);        long currentTimeMillis = System.currentTimeMillis();        long nextUpdateTimeMillis = (currentTimeMillis *2) + DateUtils.MINUTE_IN_MILLIS;        Time nextUpdateTime = new Time();        nextUpdateTime.set(nextUpdateTimeMillis);        if (nextUpdateTime.hour < 8 || nextUpdateTime.hour >= 22)        {          nextUpdateTime.hour = 8;          nextUpdateTime.minute = 0;          nextUpdateTime.second = 0;          nextUpdateTimeMillis = nextUpdateTime.toMillis(false) + DateUtils.DAY_IN_MILLIS;        }        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);       // alarmManager.set(AlarmManager.RTC nextUpdateTimeMillis pendingIntent);        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP System.currentTimeMillis()+1000060000pendingIntent);        Streamer str = new Streamer();        boolean alarmUp = (PendingIntent.getBroadcast(this 0                 new Intent(MainActivity.thisAlarmReceiver.class)                 PendingIntent.FLAG_NO_CREATE) != null);        if (alarmUp)        {            Log.d(""myTag""Alarm is already active"");        }        System.out.println(currentTimeMillis);      }

AlarmReceiver

public class AlarmReceiver extends BroadcastReceiver {    @Override     public void onReceive(Context context Intent intent) {          Log.d(""myTag""Alarm has been received"");    intent = new Intent(context MainActivity.class);    PendingIntent pendingIntent = PendingIntent.getService(context 0 intent 0);     Streamer str = new Streamer();        Calendar calendar = str.getIcs();        System.out.println(calendar);}}

解决方案

你可以在你的activity注册BroadcastReceiver然后在onPause注销

public class MainActivity extends Activity {    private BroadcastReceiver receiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context Intent intent) {            Toast.makeText(getApplicationContext()received"" Toast.LENGTH_SHORT).show();        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent = new Intent(""TESTING"");        PendingIntent pendingIntent = PendingIntent.getBroadcast(this 0 intent PendingIntent.FLAG_UPDATE_CURRENT);        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP System.currentTimeMillis() + 5000 10000 pendingIntent);    }    @Override    protected void onResume() {        super.onResume();        registerReceiver(receiver new IntentFilter(""TESTING""));    }    @Override    protected void onPause() {        unregisterReceiver(receiver);        super.onPause();    }}