Question

我在聊天应用程序中使用以下代码，它使用RealTime Firebase数据库在用户之间聊天。

我想在新邮件到达时使用通知声音，并在工具栏上有一个选项可以将其关闭或打开。

是否可能。

以下是Chat_Room的代码

＆＃13;

package com.nepalpolice.mnemonics.chat;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.nepalpolice.mnemonics.R;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * Created by filipp on 6/28/2016.
 */
public class Chat_Room  extends AppCompatActivity{

    private Button btn_send_msg;
    private EditText input_msg;
    private TextView chat_conversation;

    private Toolbar mainToolbar;
    private String user_name,room_name;
    private DatabaseReference root ;
    private String temp_key;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.chat_room);

        btn_send_msg = (Button) findViewById(R.id.btn_send);
        input_msg = (EditText) findViewById(R.id.msg_input);
        chat_conversation = (TextView) findViewById(R.id.textView);
        user_name = getIntent().getExtras().get("user_name").toString();
        room_name = getIntent().getExtras().get("room_name").toString();

        mainToolbar = (Toolbar) findViewById(R.id.main_chat);
        setSupportActionBar(mainToolbar);
        getSupportActionBar().setTitle(" Room - "+room_name);


        root = FirebaseDatabase.getInstance().getReference().child(room_name);

        btn_send_msg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Map<String,Object> map = new HashMap<String, Object>();
                temp_key = root.push().getKey();
                root.updateChildren(map);
                DatabaseReference message_root = root.child(temp_key);
                Map<String,Object> map2 = new HashMap<String, Object>();
                map2.put("name",user_name);
                map2.put("msg",input_msg.getText().toString());
                message_root.updateChildren(map2);
                input_msg.getText().clear();

            }
        });

        root.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {

                append_chat_conversation(dataSnapshot);
            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {

                append_chat_conversation(dataSnapshot);

            }

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

    }

    private String chat_msg,chat_user_name;

    private void append_chat_conversation(DataSnapshot dataSnapshot) {

        Iterator i = dataSnapshot.getChildren().iterator();

        while (i.hasNext()){

               chat_msg = (String) ((DataSnapshot)i.next()).getValue();
            chat_user_name = (String) ((DataSnapshot)i.next()).getValue();

            chat_conversation.append(chat_user_name +" : "+chat_msg +" \n");
        }



    }
    public static boolean isNetworkStatusAvialable (Context context) {
        ConnectivityManager cm =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        return activeNetwork != null &&
                activeNetwork.isConnectedOrConnecting();

    }

}

＆＃13;

我的Firebase数据结构

Firebase Data Structure Image

提前致谢。

我的Mainactivity文件是

＆＃13;

package com.nepalpolice.mnemonics.chat;

import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.Typeface;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.nepalpolice.mnemonics.R;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import static java.security.AccessController.getContext;

public class MainActivity extends AppCompatActivity {
    ProgressBar progressBar;
    private Toolbar mainToolbar;
    private Button  add_room;
    private EditText room_name;
    public static final String MyPREFERENCES = "MyPrefs" ;
    public static final String username = "userKey";
    SharedPreferences sharedpreferences;
    private ListView listView;
    private ArrayAdapter<String> arrayAdapter;
    private ArrayList<String> list_of_rooms = new ArrayList<>();
    private String name;
    private DatabaseReference root = FirebaseDatabase.getInstance().getReference().getRoot();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_chat);


        mainToolbar = (Toolbar) findViewById(R.id.main_chatbar);
        setSupportActionBar(mainToolbar);
        getSupportActionBar().setTitle("Chat Rooms");

        progressBar= (ProgressBar) findViewById(R.id.webViewProgressfaq);
        add_room = (Button) findViewById(R.id.btn_add_room);
        room_name = (EditText) findViewById(R.id.room_name_edittext);
        listView = (ListView) findViewById(R.id.listView);
        sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

        arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list_of_rooms);

        listView.setAdapter(arrayAdapter);



        add_room.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Map<String,Object> map = new HashMap<String, Object>();
                map.put(room_name.getText().toString(),"");
                root.updateChildren(map);

            }
        });


        if(isNetworkStatusAvialable (getApplicationContext())) {
            request_user_name();
            root.addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {

                    Set<String> set = new HashSet<String>();
                    Iterator i = dataSnapshot.getChildren().iterator();

                    while (i.hasNext()) {
                        set.add(((DataSnapshot) i.next()).getKey());
                    }

                    list_of_rooms.clear();
                    list_of_rooms.addAll(set);

                    arrayAdapter.notifyDataSetChanged();

                }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });

        }else{
            Toast.makeText(getBaseContext(), "You're Offline!", Toast.LENGTH_SHORT).show();
            progressBar.setVisibility(View.VISIBLE);
        }


        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                Intent intent = new Intent(getApplicationContext(),Chat_Room.class);
                intent.putExtra("room_name",((TextView)view).getText().toString() );
                intent.putExtra("user_name",name);
                startActivity(intent);
            }
        });

    }



    private void request_user_name() {
     final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Enter name:");

        final EditText input_field = new EditText(this);
        input_field.setText(sharedpreferences.getString("username",""));
        final SharedPreferences.Editor editor = sharedpreferences.edit();

        builder.setCancelable(false);
        builder.setView(input_field);
        final String savedName = sharedpreferences.getString(username,"");
        input_field.setText(savedName);
        input_field.setSelection(input_field.getText().length());
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                name = input_field.getText().toString();

                if(TextUtils.isEmpty(savedName)) {
                    input_field.setError("Your message");
                    builder.setCancelable(false);
                }
                editor.putString(username, name);
                editor.apply();
            }
        });

        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {

                if(TextUtils.isEmpty(savedName)) {
                    input_field.setError("Your message");
                    builder.setCancelable(false);
                }
                else
                {
                    dialogInterface.cancel();
                    request_user_name();
                }

            }
        });
        builder.show();
    }

    public static boolean isNetworkStatusAvialable (Context context) {
        ConnectivityManager cm =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        return activeNetwork != null &&
                activeNetwork.isConnectedOrConnecting();

    }
}

＆＃13;

Answer 1

您应该为通知添加FirebaseMessaging。并在收到通知时设置声音。 refer this link。我会帮你的。还学习如何使用firebase功能。 Firebase功能将帮助您将实时数据库从云计算到Android。 Firebase functions

Answer 2

    NotificationCompat.Builder builder =  new NotificationCompat.Builder(this)  
    .setSmallIcon(R.drawable.ic_launcher)  
    .setContentTitle("Notifications Example")  
    .setContentText("This is a test notification");  


  Intent notificationIntent = new Intent(this, MenuScreen.class);  

  PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,   
    PendingIntent.FLAG_UPDATE_CURRENT);  

 builder.setContentIntent(contentIntent);  
 builder.setAutoCancel(true);
 builder.setLights(Color.BLUE, 500, 500);
 long[] pattern = {500,500,500,500,500,500,500,500,500};
 builder.setVibrate(pattern);
 builder.setStyle(new NotificationCompat.InboxStyle());
 builder.setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
 NotificationManager manager = (NotificationManager) 
 getSystemService(Context.NOTIFICATION_SERVICE);  
 manager.notify(1, builder.build());

Answer 3

   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            notificationBuilder = new NotificationCompat.Builder(this, "")
                    .setColor(context.getResources().getColor(R.color.colorGreen))
                    .setContentText(body)
                    .setSmallIcon(R.drawable.white_logo)
                    .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
                    .setStyle(new NotificationCompat.BigPictureStyle().bigPicture(image).setSummaryText(body))
                    .setContentTitle(title + "\n")
                    .setPriority(NotificationCompat.PRIORITY_HIGH)
                    .setAutoCancel(true)
                    .setSound(defaultSoundUri);
        } else {
            Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            notificationBuilder = new NotificationCompat.Builder(this, "")
                    .setSmallIcon(R.drawable.white_logo)
                    .setStyle(new NotificationCompat.BigPictureStyle().bigPicture(image).setSummaryText(body))/*Notification with Image*/
                    .setContentTitle(title + "\n")
                    .setContentText(body)
                    .setAutoCancel(true)
                    .setSound(defaultSoundUri);
        }
    }

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());

Answer 4

您可以使用radioButton，听取其状态，然后将其保存到SharedPreference。继承人如何

SharedPreferences.Editor editor = getSharedPreferences("MyApp", MODE_PRIVATE).edit();
editor.putBoolean("allowNotification", radioButton.isChecked());
editor.apply();

并阅读偏好

SharedPreferences prefs = getSharedPreferences("MyApp", MODE_PRIVATE);
boolean allowNOtific = prefs.getBoolean("allowNotification", false);

radioButton.setChecked(allowNOtific);

并创建并发出声音通知，并将其作为您活动的可点击链接

Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent resultIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri notificationSoundURI = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder mNotificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(subject)
                .setContentText(object.getString("body"))
                .setAutoCancel(true)
                .setSound(notificationSoundURI)
                .setContentIntent(resultIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0, mNotificationBuilder.build());

        ToneGenerator toneG = new ToneGenerator(AudioManager.STREAM_ALARM, ToneGenerator.MAX_VOLUME);
        toneG.startTone(ToneGenerator.TONE_CDMA_HIGH_L, 3000);
        ((Vibrator)getSystemService(VIBRATOR_SERVICE)).vibrate(2000);

注意：Vibrate需要此权限

<uses-permission android:name="android.permission.VIBRATE" />

希望这有帮助

编辑：

错误在Chat_Room中，所以基本上它被认为是不同的问题。我的怀疑是你的.hasNext()仍然返回true导致错误。我没有尝试过这样的方法，所以我不确定。你尝试我的方法怎么样，这是一个示例代码

for (DataSnapshot messageThread : dataSnapshot.getChildren()) {
    String lastMessage = (String) messageThread.child("lastMessage").getValue();
}

新消息从Firebase实时数据库到达时如何发出声音通知

4 个答案: