在我正在处理的这个应用程序上，我想在应用程序不在前台时收到通知。基本上，当您在应用程序中时，您的在线和用户可以向您发送消息。根据您在应用程序中的位置，您将看到一个对话框，说明您收到了消息或在消息活动中获取了全文。但是，我想处理您在未运行应用程序时收到的消息。我已经构建了一个通知活动，但我不知道如何让应用程序在后台运行并推送通知。
以下是一个活动示例，该活动会收到一条消息发送给您的提醒
public class TabExercise extends TabActivity implements ChatCallbackAdapter{
/** Called when the activity is first created. */
public StartSocket connect;
public static Context mContext;
private ConnectSocket connectsocket;
final Context context = this;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab_exercise);
TabHost tabHost = getTabHost();
connectsocket= new ConnectSocket(this);
connectsocket.start();
// connect=new StartSocket();
mContext=TabExercise.this;
// Tab for Contacts
TabSpec contacts = tabHost.newTabSpec("Contacts");
// setting Title and Icon for the Tab
contacts.setIndicator("Contacts", getResources().getDrawable(R.drawable.ic_launcher));
Intent contactsIntent = new Intent(this, Contacts.class);
contacts.setContent(contactsIntent);
// Tab for Songs
TabSpec songspec = tabHost.newTabSpec("Notifications");
songspec.setIndicator("Notifications", getResources().getDrawable(R.drawable.ic_launcher));
Intent songsIntent = new Intent(this, Notifications.class);
songspec.setContent(songsIntent);
// Tab for Videos
TabSpec videospec = tabHost.newTabSpec("Messages");
videospec.setIndicator("Messages", getResources().getDrawable(R.drawable.ic_launcher));
Intent videosIntent = new Intent(this, MyMessages.class);
videospec.setContent(videosIntent);
// Adding all TabSpec to TabHost
tabHost.addTab(contacts); // Adding photos tab
tabHost.addTab(songspec); // Adding songs tab
tabHost.addTab(videospec); // Adding videos tab
TabWidget widget = tabHost.getTabWidget();
for(int i = 0; i < widget.getChildCount(); i++) {
View v = widget.getChildAt(i);
// Look for the title view to ensure this is an indicator and not a divider.
TextView tv = (TextView)v.findViewById(android.R.id.title);
if(tv == null) {
continue;
}
v.setBackgroundResource(R.layout.tab_indicator_holo);
}
Intent in= getIntent();
String tabSel=in.getStringExtra("tab_index");
//Bundle extras = in.getExtras();
if (tabSel != null) {
if(tabSel.equals("1")){
tabHost.setCurrentTab(Integer.valueOf(tabSel));
}
if(tabSel.equals("2")){
tabHost.setCurrentTab(Integer.valueOf(tabSel));
}
}
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home, menu);
// SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
// SearchView searchView = (SearchView) menu.findItem(R.id.menu_search).getActionView();
// Assumes current activity is the searchable activity
// searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
//searchView.setInputType(InputType.TYPE_CLASS_TEXT);
// searchView.setIconifiedByDefault(false); // Do not iconify the widget; expand it by default
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.logout:
// app icon in action bar clicked; go home
SaveSharedPreference.setUserName(TabExercise.this,"");
SaveSharedPreference.setName(TabExercise.this,"");
SaveSharedPreference.setUserId(TabExercise.this,"");
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
return true;
case R.id.find_a_user:
// app icon in action bar clicked; go home
Intent in = new Intent(this, Contacts.class);
startActivity(in);
return true;
case R.id.editprofile:
Intent inte=new Intent(this, EditProfile.class);
startActivity(inte);
return true;
case R.id.chat:
Intent inti = new Intent(this, StartChat.class);
startActivity(inti);
return true;
case R.id.delete_all:
//connect.start();
Intent inten=new Intent(TabExercise.this, CreateNotification.class);
startActivity(inten);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void callback(JSONArray data) throws JSONException {
// TODO Auto-generated method stub
}
@Override
public void on(String event, JSONObject data) {
// TODO Auto-generated method stub
}
@Override
public void onMessage(String message) {
// TODO Auto-generated method stub
}
@Override
public void onMessage(JSONObject json) {
// TODO Auto-generated method stub
}
@Override
public void onConnect() {
// TODO Auto-generated method stub
}
@Override
public void onDisconnect() {
// TODO Auto-generated method stub
}
@Override
public void onConnectFailure() {
// TODO Auto-generated method stub
}
@Override
public void onMessageReceived(Message m) {
// TODO Auto-generated method stub
Log.d("Status","This is the status "+m.status);
if(m.status.equals("ready")){
connectsocket.login(SaveSharedPreference.getName(TabExercise.this), SaveSharedPreference.getUserId(TabExercise.this));
connectsocket.subscribe();
}
if(m.status.equals("call")){
Intent intent=new Intent(TabExercise.this, StartCall.class);
startActivity(intent);
}
if(m.status.equals("message")){
System.out.println("Received a message "+m.msg+" and a name "+m.name);
final String name=m.name;
final String pid=m.pid;
final String msg=m.msg;
//Intent intenter=new Intent(TabExercise.this, CreateNotification.class);
//startActivity(intenter);
runOnUiThread(new Runnable(){
public void run(){
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
alertDialogBuilder.setTitle(name+" just sent you a message");
alertDialogBuilder.setMessage("Click yes to go to the message");
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
Intent inte=new Intent(TabExercise.this, Chat.class);
Bundle extras=new Bundle();
extras.putString("name", name);
extras.putString("pid", pid);
extras.putString("msg", msg);
inte.putExtras(extras);
startActivity(inte);
dialog.cancel();
}
})
.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
});
}
}
这是创建通知的通知活动。
public class CreateNotification extends Activity {
View viewer;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_notification);
Intent intent = new Intent(this, ReceiveNotification.class);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);
// Build notification
// Actions are just fake
Notification noti = new Notification.Builder(this)
.setContentTitle("Received a message")
.setContentText("Subject").setSmallIcon(R.drawable.ic_launcher)
.setContentIntent(pIntent)
.addAction(R.drawable.ic_launcher, "Rply", pIntent)
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Hide the notification after its selected
noti.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, noti);
}
}
答案 0 :(得分：0)
使用警报管理器定期触发警报。收到警报后，运行后台服务以轮询服务器以查看收到的任何消息。
否则，如果您希望服务器将邮件直接推送到您的设备，则可以使用Google Cloud Messaging。