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複数のクライアントが同じ部屋にサインインしてチャットできるうえで、2台のアンドロイドデバイス間でfirebaseを使用してチャットアプリケーションを作成しました。 私のコードにgpsアクティビティを追加して、あるユーザがgpsという単語を送信すると、他のユーザは5秒ごとにその場所を送信し、そのまま送信します。 それは言葉「GPS」私は私のチャットコードFCMを使用して位置座標を送信する
主な活動::
public class MainActivity extends AppCompatActivity {
EditText roomname;
Button join;
ListView roomlist;
ArrayList<String> roomarraylist; // to store rooms list
ArrayAdapter<String> roomadapter;
DatabaseReference databaseReference;
public String username;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
roomname=(EditText)findViewById(R.id.editText);
join=(Button)findViewById(R.id.button2);
roomlist=(ListView)findViewById(R.id.roomlistview);
roomarraylist=new ArrayList<String>();
roomadapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,roomarraylist);
roomlist.setAdapter(roomadapter);
databaseReference= FirebaseDatabase.getInstance().getReference().getRoot();
request_username();
join.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Map<String,Object> map=new HashMap<String, Object>();
map.put(roomname.getText().toString(),"");
databaseReference.updateChildren(map);
}
});
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
Iterator iterator =dataSnapshot.getChildren().iterator();
Set<String> set=new HashSet<String>();
while (iterator.hasNext()){
// GET NAMES OF ALL ROOMS ONE BY ONE FROM DATABASE
set.add((String) ((DataSnapshot)iterator.next()).getKey());
}
roomarraylist.clear();
roomarraylist.addAll(set);
roomadapter.notifyDataSetChanged();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
roomlist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent=new Intent(MainActivity.this,Chat_room.class);
intent.putExtra("Room_Name",((TextView)view).getText().toString());
intent.putExtra("UserName",username);
startActivity(intent);
}
});
}
private void request_username() {
AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle("Please Enter your Name");
final EditText edittext=new EditText(this);
builder.setView(edittext);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
username=edittext.getText().toString();
if(!TextUtils.isEmpty(username)){
}
else{
request_username();
}
}
}).setNegativeButton("Quit", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
request_username();
}
});
builder.show();
}
}
Chat_roomクラスでこれを行うことができますどのように場所を送り続けるを運ぶ場合のアイデアは、受信したメッセージに条件を入れています。 ：
public class Chat_room extends AppCompatActivity {
Button btnsend;
TextView recievedmsg;
EditText editmsg;
DatabaseReference rootRoomName;
String roomname;
String username;
private String chatusername;
private String chatmessage;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_room);
btnsend=(Button)findViewById(R.id.btnsend);
recievedmsg=(TextView)findViewById(R.id.recievedmsg);
editmsg=(EditText)findViewById(R.id.editmsg);
roomname=getIntent().getExtras().get("Room_Name").toString();
username=getIntent().getExtras().get("UserName").toString();
setTitle(roomname);
rootRoomName= FirebaseDatabase.getInstance().getReference().getRoot().child(roomname);
btnsend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DatabaseReference childRoot=rootRoomName.push();
Map<String,Object> map=new HashMap<String, Object>();
map.put("Name",username);
map.put("message",editmsg.getText().toString());
childRoot.updateChildren(map);
}
});
rootRoomName.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
update_message(dataSnapshot);
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
update_message(dataSnapshot);
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void update_message(DataSnapshot dataSnapshot) {
chatusername=(String)dataSnapshot.child("Name").getValue();
chatmessage=(String)dataSnapshot.child("message").getValue();
recievedmsg.append(chatusername + ":" + chatmessage + "\n\n");
}
}
GPS活動::
public class Gps extends AppCompatActivity implements ConnectionCallbacks, OnConnectionFailedListener, LocationListener {
TextView x;
TextView y;
LocationRequest LR;
private GoogleApiClient GAC;
String lat;
String Lon;
//public String lat="Latitude";
//public String lon="Longitude";
@Override
public void onConnected(Bundle connectionHint) {
createLocationRequest();
startLocationUpdates();
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Location Location = LocationServices.FusedLocationApi.getLastLocation(GAC);
if (Location != null) {
Double Lat = Location.getLatitude();
Double lon = Location.getLongitude();
x = (TextView) findViewById(R.id.textView);
y = (TextView) findViewById(R.id.textView2);
x.setText("Ltitude is " + String.valueOf(Lat));
y.setText("Longitude is " + String.valueOf(lon));
}
}
@Override
protected void onStart() {
super.onStart();
if (GAC != null) {
GAC.connect();
}
}
@Override
protected void onStop() {
GAC.disconnect();
super.onStop();
}
@Override
public void onConnectionSuspended(int cause) {
Toast.makeText(this, "the connection suspended", Toast.LENGTH_LONG).show();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
Toast.makeText(this, "the connection failed", Toast.LENGTH_LONG).show();
}
@Override
public void onLocationChanged(Location location) {
x = (TextView) findViewById(R.id.textView);
y = (TextView) findViewById(R.id.textView2);
x.setText("latitude is " + String.valueOf(location.getLatitude()));
y.setText("longitude is " + String.valueOf(location.getLongitude()));
}
protected void createLocationRequest() {
LR = new LocationRequest();
LR.setInterval(5000);
LR.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
protected void startLocationUpdates() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(
GAC, LR, (this));
}
protected void build_GAC() {
GAC = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gps);
build_GAC();
}
}