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我是Android開發的新手，我嘗試使用服務和intentservice獲得一些練習。服務和intentservice之間的溝通
這是我的服務類：
public class MyBaseService extends Service {
private double[] returnData;
public MyBaseService() {
}
@Override
public void onCreate() {
returnData = new double[//dataSise];
}
/** The service is starting, due to a call to startService() */
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
for (Map.Entry<Integer, Double[]> mapEntry : dataMap.entrySet()) {
doXYZ(mapEntry.getValue());
Arrays.sort(returnData);
}
} catch (IOException e) {
e.printStackTrace();
}
Intent intents = new Intent();
intents.setAction(ACTION_SEND_TO_ACTIVITY);
sendBroadcast(intents);
return START_STICKY;
}
/** A client is binding to the service with bindService() */
@Override
public IBinder onBind(Intent arg0) {
return mBinder;
}
public class MyBinder extends Binder {
public MyBaseService getService() {
return MyBaseService.this;
}
}
/** Called when a client is binding to the service with bindService()*/
@Override
public void onRebind(Intent intent) {
}
/** Called when The service is no longer used and is being destroyed */
@Override
public void onDestroy() {
super.onDestroy();
}
private void doXYZ(double[] data) {
int gallerySize = galleryFiles.length;
for (int i=0; i<data.length; ++i) {
Intent cfIntent = new Intent(this, MyIntentService.class);
compareFeatureIntent.putExtra(MyIntentService.COMPARING_INDEX, i);
startService(cfIntent);
}
}
BroadcastReceiver mReceiver;
// use this as an inner class like here or as a top-level class
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int index = intent.getIntExtra(MyIntentService.COMPARING_INDEX, 0);
double scores = intent.getDoubleArrayExtra(MyIntentService.COMPARING_SCORE);
data[index] = scores[0];
}
// constructor
public MyReceiver(){
}
}
}
這是intentservice類：
public class MyIntentService extends IntentService {
protected static final String ACTION_COMPARE_FEATURES = "CompareFeatures";
protected static final String COMPARING_SCORE = "Score";
protected static final String COMPARING_INDEX = "Index";
public MyIntentService() {
super("MyIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
int index = (int)intent.getLongExtra(COMPARING_INDEX, 0);
// This is long operation
double[] scores = getScores(index);
Intent intents = new Intent();
intents.setAction(ACTION_COMPARE_FEATURES);
intent.putExtra(COMPARING_SCORE, scores);
intent.putExtra(COMPARING_INDEX, index);
sendBroadcast(intents);
}
}
的情況是，我要開始MyBaseService類主要活動內部。在MyBaseService裏面，我需要做一個長時間運行的操作，並且需要多次迭代該操作。所以，我把這個長操作放在MyIntentService中，然後在一個循環中啓動MyIntentService。
MyIntentService會產生一些數據，我想在MyBaseService類中獲取這些數據來做一些進一步的操作。
問題我正面臨與MyBaseService和MyIntentService之間的通信。因爲MyBaseService會多次啓動MyIntentSerice，所以我最初的解決方案是從MyIntentService中sendBroadcast（），並在MyBaseService中註冊接收者。
所以，我的問題是：
是我與MyBaseService MyIntentService設計效率？如果不是，我應該如何將我想要的結果歸檔？
如果sendBroadcast（）是一個正確的方向，我應該如何在MyBaseService中註冊？