Question

我使用async并且代码看起来很好，没有出现任何错误，但我的布局没有正确更新，这里出了什么问题？我尝试了与闹钟管理器的所有组合，但我的列表没有自动更新。

这是我的主要内容：

alarmmanager

这是我的适配器：

public class MainActivity extends AppCompatActivity implements UpdateResultReceiver.Receiver {
private static final String TAG = "MainActivity";
Data mData;
RecyclerView recyclerView;
NotificationManager manager;
static int x = 0;
RecyclerAdapter adapter;
private boolean isInited = false;

ArrayList<String> liste;
ArrayList<String> liste2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
    manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

    init();
}

private void fillLists() {
    new AsyncCaller().execute();
}

private void init() {
    fillLists();
    scheduleUpdater();
}

private class AsyncCaller extends AsyncTask<Void, Void, Data> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected Data doInBackground(Void... params) {
        try {
            mData = new Data();
        } catch (Exception e) {
            Log.e(TAG, "doInBackground: ", e);
        }
        return mData;
    }

    @Override
    protected void onPostExecute(Data data) {
        super.onPostExecute(data);
        if (mData == null) {
            Toast.makeText(MainActivity.this, "Hata oluştu", Toast.LENGTH_SHORT).show();
            return;
        }
        liste = data.getList();
        liste2 = data.getList2();
        int s = data.ListSize();

        if (!isInited && liste != null && liste.size() > 0) {
            adapter = new RecyclerAdapter(liste, liste2, MainActivity.this);
            recyclerView.setAdapter(adapter);
            recyclerView.setHasFixedSize(true);
            recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
            isInited = true;
        }
        if (isInited) {
            adapter.notifyDataSetChanged();

            int a = adapter.getItemCount();
            if (a != x) {
                generateNotification(MainActivity.this, "Listede Degisim Var");

            }
            x = a;
        }
    }
}

private void generateNotification(Context context, String message) {
    int notificationId = 001;
    Intent viewIntent = new Intent(context, MainActivity.class);

    PendingIntent viewPendingIntent = PendingIntent.getActivity(context, 0, viewIntent, 0);

    NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.dikat).setContentTitle("Bildirim").setContentText(message)
            .setContentIntent(viewPendingIntent).setAutoCancel(true)
            .setVibrate(new long[]{1000, 1000, 1000, 1000, 1000});

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);

    notificationManager.notify(notificationId, notificationBuilder.build());
}

@Override
public void onReceiveResult(int resultCode, Bundle resultData) {
    fillLists();
}

public void scheduleUpdater() {
    try {
        if (!isAlarmUp(this)) {
            UpdateResultReceiver mReceiver = new UpdateResultReceiver(new Handler());
            mReceiver.setReceiver(this);
                    /* Setting the alarm here */
            Intent alarmIntent = new Intent(this, PatientListUpdaterReceiver.class);
            alarmIntent.putExtra("receiver", mReceiver);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);

            AlarmManager manager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
            manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System
                    .currentTimeMillis(), 10000, pendingIntent);
        }
    } catch (Exception e) {
        Log.e("asdads", "schedule: " + e.getMessage(), e);
    }

}

public void cancelUpdater(Context context) {
    try {
        if (isAlarmUp(context)) {
            Intent intent = new Intent(context, PatientListUpdaterReceiver.class);
            PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
            AlarmManager alarmManager = (AlarmManager) context
                    .getSystemService(Context.ALARM_SERVICE);

            alarmManager.cancel(sender);
        }
    } catch (Exception e) {
        Log.e("asdasd", "cancel: " + e.getMessage(), e);
    }
}

private boolean isAlarmUp(Context context) {
    return (PendingIntent
            .getBroadcast(context, 0, new Intent(context, PatientListUpdaterReceiver.class), PendingIntent.FLAG_NO_CREATE) != null);
}
}

这是数据部分：

public class RecyclerAdapter extends  RecyclerView.Adapter<RecyclerViewHolder> {

int sayi=0;
ArrayList<String> liste ,liste2;
static ArrayList<String> liste3 = new ArrayList<>() ;

Context context;
LayoutInflater inflater;
public RecyclerAdapter(ArrayList<String> liste, ArrayList<String> liste2, Context context) {
    this.context=context;
    this.liste=liste;
    this.liste2=liste2;
    inflater=LayoutInflater.from(context);
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v=inflater.inflate(R.layout.item_list, parent, false);



    RecyclerViewHolder viewHolder=new RecyclerViewHolder(v);
    return viewHolder;
}

@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
    liste3.add("a");

    sayi = 0;
    for (int j = 0; j < liste3.size(); j++) {
        if (liste3.get(j).equals(liste.get(position))) {
            sayi++;
        }
        if (sayi == 0) {
            holder.imageView.setTag(holder);
        } else {
            holder.imageView.setImageResource(R.drawable.ic_checkin);
        }
        holder.tv1.setText(liste.get(position));
        holder.tv2.setText(liste2.get(position));
        holder.imageView.setOnClickListener(clickListener);
    }

}


View.OnClickListener clickListener=new View.OnClickListener() {
    @Override
    public void onClick(View v) {


        RecyclerViewHolder vholder = (RecyclerViewHolder) v.getTag();
        int position = vholder.getPosition();
        //Toast.makeText(context,"This is position "+position,Toast.LENGTH_LONG ).show();
        vholder.imageView.setImageResource(R.drawable.ic_checkin);
        liste3.add(liste.get(position));
    }
};





@Override
public int getItemCount() {
    return liste.size();
}




}

Answer 1

问题是您是否更改了对数据的引用，因此适配器不会理解更改！让我们举个例子：

List data=new ArrayList();
MyAdapter adapter=new MyAdapter(data);

稍后如果您希望适配器收到有关更改的通知，您应该只使用传递给适配器的引用！您应该将data设为全局变量（私有，公共，您喜欢的任何内容），以便您可以从代码中的其他位置访问它。然后你只需更改其中的数据并添加或删除项目，然后调用notifydatasetchange。那就行了。

Recyleview不会自动更新适配器或布局

1 个答案: