从android中的服务调用BroadCastReceiver以更新片段中的UI?
我想从从android中的服务调用BroadCastReceiver以更新片段中的UI?,android,android-fragments,broadcastreceiver,android-service,google-cloud-messaging,Android,Android Fragments,Broadcastreceiver,Android Service,Google Cloud Messaging,我想从服务更新片段的UI。我正在使用GCM发送消息。我有这个类用于GCM: public class GcmIntentService extends IntentService { public GcmIntentService() { super("GcmIntentService"); } @Override protected void onHandleIntent(Intent inte
服务
更新片段
的UI
。我正在使用GCM
发送消息。我有这个类用于GCM
:
public class GcmIntentService extends IntentService {
public GcmIntentService() {
super("GcmIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
// The getMessageType() intent parameter must be the intent you received
// in your BroadcastReceiver.
String messageType = gcm.getMessageType(intent);
if (extras != null && !extras.isEmpty()) { // has effect of unparcelling Bundle
// Since we're not using two way messaging, this is all we really to check for
if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
Logger.getLogger("GCM_RECEIVED").log(Level.INFO, extras.toString());
showToast(extras.getString("message"));
Intent sendData = new Intent("chatupdater");
sendData.putExtra("msg",extras.getString("message"));
sendBroadcast(sendData);
}
}
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
在onHandleIntent()中
方法我将消息广播到一个片段,该片段注册到broadcastedreceiver
。我有一个SlidingDrawerActivity
,它有许多片段,ChatFragment
就是其中之一。我想将此消息从gcminentservice
发送到ChatFragmen
t.我的聊天片段类:
public class ChatFragment extends Fragment {
private EditText et_chat;
Bundle mailData;
String caller_mail;
private ListView chatListview;
private ChatWindowAdapter chatWindowAdapter;
private List<ChatSession>PreviousChatSession;
private List<ChatInfo> chatListItems;
Button chat_send;
public ChatFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.chat_window, null, false);
et_chat = (EditText) v.findViewById(R.id.et_chat);
chat_send = (Button) v.findViewById(R.id.bt_chat_send);
chatListview = (ListView)v.findViewById(R.id.chat_listView);
chatListItems = new ArrayList<ChatInfo>();
chatWindowAdapter = new ChatWindowAdapter(getActivity(),chatListItems);
chatListview.setAdapter(chatWindowAdapter);
mailData=getArguments();
caller_mail = mailData.getString(PropertyNames.Userinfo_Mail.getProperty());
retrieveChats();
chat_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ChatInfo chatInfo= new ChatInfo();
chatInfo.setChat_text(et_chat.getText().toString());
chatInfo.setDirection("right");
chatListItems.add(chatInfo);
chatWindowAdapter.notifyDataSetChanged();
fetchID(caller_mail);
}
});
return v;
}
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String msg = intent.getStringExtra("msg");
Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
}
};
public class ChatBroadCastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(this.broadCastNewMessage, new IntentFilter("bcNewMessage"));
...
}
BroadcastReceiver broadCastNewMessage = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// here you can update your db with new messages and update the ui (chat message list)
msgAdapter.notifyDataSetChanged();
mListView.requestLayout();
...
}
}
@Override
public void onDestroy() {
super.onDestroy();
getActivity().unregisterReceiver(broadCastNewMessage);
}
我在sendBroadcast(sendData)
中有意发送消息,并在chatFragment
中接收消息,在onReceive()
方法中,我希望在Toast中查看消息。但是Toast没有显示。我是否为片段内部服务正确实现了BroadcastReceiver?? 编辑:我已经调试过,发现下面的部分没有调用
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.i("chat","I am in BroadCastReceiver");
String msg = intent.getStringExtra("msg");
Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
}
};
我是否必须在menifest中包含关于接收器的任何内容 在片段类中使用以下片段: 1。注册广播:
public class ChatFragment extends Fragment {
private EditText et_chat;
Bundle mailData;
String caller_mail;
private ListView chatListview;
private ChatWindowAdapter chatWindowAdapter;
private List<ChatSession>PreviousChatSession;
private List<ChatInfo> chatListItems;
Button chat_send;
public ChatFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.chat_window, null, false);
et_chat = (EditText) v.findViewById(R.id.et_chat);
chat_send = (Button) v.findViewById(R.id.bt_chat_send);
chatListview = (ListView)v.findViewById(R.id.chat_listView);
chatListItems = new ArrayList<ChatInfo>();
chatWindowAdapter = new ChatWindowAdapter(getActivity(),chatListItems);
chatListview.setAdapter(chatWindowAdapter);
mailData=getArguments();
caller_mail = mailData.getString(PropertyNames.Userinfo_Mail.getProperty());
retrieveChats();
chat_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ChatInfo chatInfo= new ChatInfo();
chatInfo.setChat_text(et_chat.getText().toString());
chatInfo.setDirection("right");
chatListItems.add(chatInfo);
chatWindowAdapter.notifyDataSetChanged();
fetchID(caller_mail);
}
});
return v;
}
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String msg = intent.getStringExtra("msg");
Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
}
};
public class ChatBroadCastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(this.broadCastNewMessage, new IntentFilter("bcNewMessage"));
...
}
BroadcastReceiver broadCastNewMessage = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// here you can update your db with new messages and update the ui (chat message list)
msgAdapter.notifyDataSetChanged();
mListView.requestLayout();
...
}
}
@Override
public void onDestroy() {
super.onDestroy();
getActivity().unregisterReceiver(broadCastNewMessage);
}
2。宣布您的广播:
public class ChatFragment extends Fragment {
private EditText et_chat;
Bundle mailData;
String caller_mail;
private ListView chatListview;
private ChatWindowAdapter chatWindowAdapter;
private List<ChatSession>PreviousChatSession;
private List<ChatInfo> chatListItems;
Button chat_send;
public ChatFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.chat_window, null, false);
et_chat = (EditText) v.findViewById(R.id.et_chat);
chat_send = (Button) v.findViewById(R.id.bt_chat_send);
chatListview = (ListView)v.findViewById(R.id.chat_listView);
chatListItems = new ArrayList<ChatInfo>();
chatWindowAdapter = new ChatWindowAdapter(getActivity(),chatListItems);
chatListview.setAdapter(chatWindowAdapter);
mailData=getArguments();
caller_mail = mailData.getString(PropertyNames.Userinfo_Mail.getProperty());
retrieveChats();
chat_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ChatInfo chatInfo= new ChatInfo();
chatInfo.setChat_text(et_chat.getText().toString());
chatInfo.setDirection("right");
chatListItems.add(chatInfo);
chatWindowAdapter.notifyDataSetChanged();
fetchID(caller_mail);
}
});
return v;
}
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String msg = intent.getStringExtra("msg");
Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
}
};
public class ChatBroadCastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(this.broadCastNewMessage, new IntentFilter("bcNewMessage"));
...
}
BroadcastReceiver broadCastNewMessage = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// here you can update your db with new messages and update the ui (chat message list)
msgAdapter.notifyDataSetChanged();
mListView.requestLayout();
...
}
}
@Override
public void onDestroy() {
super.onDestroy();
getActivity().unregisterReceiver(broadCastNewMessage);
}
3。注销您的广播:
public class ChatFragment extends Fragment {
private EditText et_chat;
Bundle mailData;
String caller_mail;
private ListView chatListview;
private ChatWindowAdapter chatWindowAdapter;
private List<ChatSession>PreviousChatSession;
private List<ChatInfo> chatListItems;
Button chat_send;
public ChatFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.chat_window, null, false);
et_chat = (EditText) v.findViewById(R.id.et_chat);
chat_send = (Button) v.findViewById(R.id.bt_chat_send);
chatListview = (ListView)v.findViewById(R.id.chat_listView);
chatListItems = new ArrayList<ChatInfo>();
chatWindowAdapter = new ChatWindowAdapter(getActivity(),chatListItems);
chatListview.setAdapter(chatWindowAdapter);
mailData=getArguments();
caller_mail = mailData.getString(PropertyNames.Userinfo_Mail.getProperty());
retrieveChats();
chat_send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ChatInfo chatInfo= new ChatInfo();
chatInfo.setChat_text(et_chat.getText().toString());
chatInfo.setDirection("right");
chatListItems.add(chatInfo);
chatWindowAdapter.notifyDataSetChanged();
fetchID(caller_mail);
}
});
return v;
}
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String msg = intent.getStringExtra("msg");
Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
}
};
public class ChatBroadCastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().registerReceiver(this.broadCastNewMessage, new IntentFilter("bcNewMessage"));
...
}
BroadcastReceiver broadCastNewMessage = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// here you can update your db with new messages and update the ui (chat message list)
msgAdapter.notifyDataSetChanged();
mListView.requestLayout();
...
}
}
@Override
public void onDestroy() {
super.onDestroy();
getActivity().unregisterReceiver(broadCastNewMessage);
}
然后在服务中调用sendBroadcast()方法:
this.sendBroadcast(new Intent().setAction("bcNewMessage"));
享受吧