Add: Create group feature in android app (#285)

#251

TalkIn/app/src/main/AndroidManifest.xml

@@ -17,9 +17,21 @@
         android:theme="@style/Theme.TalkIn"
         tools:targetApi="31">
         <activity
-            android:name=".UserProfileScreen"
-            android:theme="@style/Theme.AppCompat.NoActionBar"
+            android:name=".CreateGroupActivity"
+            android:exported="false" />
+        <activity
+            android:name=".GroupChatActivity"
+            android:exported="false" />
+        <activity
+            android:name=".GroupMemberSelection"
+            android:exported="false" />
+        <activity
+            android:name=".Groups"
             android:exported="false" />
+        <activity
+            android:name=".UserProfileScreen"
+            android:exported="false"
+            android:theme="@style/Theme.AppCompat.NoActionBar" />
         <activity
             android:name=".ResetPasswordActivity"
             android:exported="false"
@@ -67,8 +79,6 @@
             </intent-filter>
         </receiver>
 
-
-
         <meta-data
             android:name="preloaded_fonts"
             android:resource="@array/preloaded_fonts" />

TalkIn/app/src/main/java/com/example/talk_in/CreateGroupActivity.kt

@@ -0,0 +1,61 @@
+package com.example.talk_in
+
+import android.content.Intent
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.Log
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.example.talk_in.databinding.ActivityCreateGroupBinding
+import com.google.firebase.database.DatabaseReference
+import com.google.firebase.database.FirebaseDatabase
+
+class CreateGroupActivity : AppCompatActivity() {
+    private lateinit var mDbRef: DatabaseReference
+    private lateinit var binding: ActivityCreateGroupBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityCreateGroupBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        supportActionBar?.hide()
+
+        val groupMembers: ArrayList<String>? = intent.getStringArrayListExtra("GROUP_MEMBERS")
+        binding.confirmButton.setOnClickListener {
+            val groupName = binding.groupNameTextfield.text.toString().trim()
+            var groupDescription = binding.groupDescriptionField.text.toString().trim()
+
+            if (TextUtils.isEmpty(groupName))
+                Toast.makeText(this, "Please enter group name", Toast.LENGTH_SHORT).show()
+            else{
+                if (TextUtils.isEmpty(groupDescription))
+                    groupDescription = "Hey, Welcome to " + groupName
+                createGroup(groupName, groupDescription, groupMembers!!)
+            }
+        }
+    }
+    private fun createGroup(groupName: String, groupDescription: String?, groupMembers: ArrayList<String>) {
+        mDbRef = FirebaseDatabase.getInstance().reference
+        val groupId = mDbRef.child("groups").push().key ?: ""
+
+        val group = Group(groupName, groupDescription, groupMembers, groupId)
+
+        mDbRef.child("groups").child(groupId).setValue(group)
+            .addOnSuccessListener {
+                Toast.makeText(this, "Group created successfully", Toast.LENGTH_SHORT).show()
+                val intent = Intent(this@CreateGroupActivity, GroupChatActivity::class.java)
+                intent.putExtra("NAME", groupName)
+                intent.putExtra("GROUP_ID", groupId)
+
+                finish()
+                startActivity(intent)
+            }
+            .addOnFailureListener { exception ->
+                Log.e("CreateGroupActivity", "Error creating group", exception)
+                Toast.makeText(this, "Failed to create group", Toast.LENGTH_SHORT).show()
+                val intent = Intent(this@CreateGroupActivity, Groups::class.java)
+                finish()
+                startActivity(intent)
+            }
+    }
+}

TalkIn/app/src/main/java/com/example/talk_in/DisplayGroupAdapter.kt

@@ -0,0 +1,61 @@
+package com.example.talk_in
+
+import android.content.Context
+import android.content.Intent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import com.google.firebase.database.*
+
+class DisplayGroupAdapter(val context: Context, val groupList: ArrayList<Group>) :
+    RecyclerView.Adapter<DisplayGroupAdapter.UserViewHolder>() {
+    private lateinit var mDbRef: DatabaseReference
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): UserViewHolder {
+        mDbRef = FirebaseDatabase.getInstance().getReference()
+
+        val view: View =
+            LayoutInflater.from(context).inflate(R.layout.user_layout, parent, false)
+        return UserViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: UserViewHolder, position: Int) {
+        val currentGroup = groupList[position]
+
+        var name = currentGroup.groupName!!.toString().trim()
+        if (currentGroup.groupName?.length!! > 25)
+            name = name.substring(0, minOf(name.length, 25)) + "..."
+
+        val groupDescriptionObj = mDbRef.child("groups").child(currentGroup.groupId!!).child("groupDescription")
+        groupDescriptionObj.addListenerForSingleValueEvent(object : ValueEventListener{
+            override fun onDataChange(snapshot: DataSnapshot) {
+                val groupDescriptionValue = snapshot.getValue(String::class.java)
+                holder.groupDescription.text = groupDescriptionValue
+            }
+
+            override fun onCancelled(error: DatabaseError) {
+                // Handle possible errors
+            }
+        })
+
+
+        holder.groupName.text = name
+        holder.itemView.setOnClickListener {
+            val intent = Intent(context, GroupChatActivity::class.java)
+            intent.putExtra("NAME", currentGroup.groupName)
+            intent.putExtra("GROUP_ID", currentGroup.groupId)
+            context.startActivity(intent)
+        }
+    }
+
+    override fun getItemCount(): Int {
+        return groupList.size
+    }
+
+    class UserViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val groupName: TextView = itemView.findViewById(R.id.txt_name)
+        val groupDescription: TextView = itemView.findViewById(R.id.txt_last_message)
+    }
+}

TalkIn/app/src/main/java/com/example/talk_in/Group.kt

@@ -0,0 +1,17 @@
+package com.example.talk_in
+
+class Group {
+    var groupName: String? = null
+    var groupDescription: String? = null
+    var groupId: String? = null
+    var groupMembers: ArrayList<String>? = null
+
+    constructor(){}
+
+    constructor(groupName: String?, groupDescription: String?, groupMembers: ArrayList<String>?, groupId: String?){
+        this.groupName = groupName
+        this.groupDescription = groupDescription
+        this.groupMembers = groupMembers
+        this.groupId = groupId
+    }
+}

TalkIn/app/src/main/java/com/example/talk_in/GroupChatActivity.kt

@@ -0,0 +1,74 @@
+package com.example.talk_in
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.view.MenuInflater
+import android.view.View
+import android.widget.ImageView
+import android.widget.PopupMenu
+import android.widget.TextView
+import android.widget.Toast
+import androidx.recyclerview.widget.RecyclerView
+
+class GroupChatActivity : AppCompatActivity() {
+    private lateinit var groupChatRecyclerView: RecyclerView
+    private lateinit var nameOfGroup: TextView
+    private lateinit var backbtnImage: ImageView
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_chat)
+        Log.d("GroupChatActivity", "onCreate() method called")
+
+        val name = intent.getStringExtra("NAME")
+        val groupId = intent.getStringExtra("GROUP_ID")
+        supportActionBar?.hide()
+
+        groupChatRecyclerView = findViewById(R.id.chatRecyclerView)
+        nameOfGroup = findViewById(R.id.nameOfUser)
+        backbtnImage = findViewById(R.id.backbtnImage)
+
+        nameOfGroup.text = name
+
+        backbtnImage.setOnClickListener {
+            val intent = Intent(this@GroupChatActivity, Groups::class.java)
+            finish()
+            startActivity(intent)
+        }
+
+        val popupMenuBtn: ImageView = findViewById(R.id.popupMenuBtn)
+        popupMenuBtn.setOnClickListener { view ->
+            showPopupMenu(view)
+        }
+    }
+
+    private fun showPopupMenu(view: View) {
+        val popupMenu = PopupMenu(this, view)
+        val inflater: MenuInflater = popupMenu.menuInflater
+        inflater.inflate(R.menu.user_chat_menu, popupMenu.menu)
+        popupMenu.setOnMenuItemClickListener { menuItem ->
+            when (menuItem.itemId) {
+                R.id.viewProfile -> {
+                    Toast.makeText(this, "View Profile Clicked", Toast.LENGTH_SHORT).show()
+                    true
+                }
+                R.id.sharedMedia -> {
+                    Toast.makeText(this, "Shared Media Clicked", Toast.LENGTH_SHORT).show()
+                    true
+                }
+                R.id.search -> {
+                    Toast.makeText(this, "Search Clicked", Toast.LENGTH_SHORT).show()
+                    true
+                }
+                R.id.locateNow -> {
+                    Toast.makeText(this, "Locate Now Clicked", Toast.LENGTH_SHORT).show()
+                    true
+                }
+                else -> false
+            }
+        }
+        popupMenu.show()
+    }
+}

TalkIn/app/src/main/java/com/example/talk_in/GroupMemberSelection.kt

@@ -0,0 +1,69 @@
+package com.example.talk_in
+
+import GroupMemberSelectionAdapter
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.example.talk_in.databinding.ActivityGroupMemberSelectionBinding
+import com.google.firebase.auth.FirebaseAuth
+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
+
+class GroupMemberSelection : AppCompatActivity() {
+    private lateinit var binding: ActivityGroupMemberSelectionBinding
+    private lateinit var userList: ArrayList<User>
+    private lateinit var adapter: GroupMemberSelectionAdapter
+    private lateinit var mAuth: FirebaseAuth
+    private lateinit var mDbRef: DatabaseReference
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityGroupMemberSelectionBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        supportActionBar?.hide()
+
+        mAuth = FirebaseAuth.getInstance()
+        mDbRef = FirebaseDatabase.getInstance().getReference()
+
+        userList = ArrayList()
+        adapter = GroupMemberSelectionAdapter(this, userList)
+
+        binding.userRecyclerView.layoutManager = LinearLayoutManager(this)
+        binding.userRecyclerView.adapter = adapter
+
+        mDbRef.child("user").addValueEventListener(object : ValueEventListener {
+            override fun onDataChange(snapshot: DataSnapshot) {
+                userList.clear()
+                for (postSnapshot in snapshot.children) {
+                    val currentUser = postSnapshot.getValue(User::class.java)
+                    if (currentUser != null && mAuth.currentUser?.uid != currentUser.uid && currentUser.verified == true) {
+                        userList.add(currentUser)
+                    }
+                }
+                adapter.notifyDataSetChanged()
+            }
+
+            override fun onCancelled(error: DatabaseError) {
+                // Handle possible errors.
+            }
+        })
+
+        binding.confirmButton.setOnClickListener {
+            // Get the list of selected users from the adapter
+            val selectedUsers = adapter.getSelectedUsers()
+            val uidOfUsers = ArrayList<String>()
+            for (user in selectedUsers){
+                uidOfUsers.add(user.uid.toString())
+            }
+            val intent = Intent(this@GroupMemberSelection, CreateGroupActivity::class.java)
+            intent.putStringArrayListExtra("GROUP_MEMBERS", uidOfUsers)
+            finish()
+            startActivity(intent)
+        }
+    }
+}