I'm making a chat activity for a school project and I want the newest messages at the bottom of the listView. Adding the code below does not work. I simply want the newest message to appear at the bottom and make the listView automatically scroll to the last list item. Thanks in advance!
android:transcriptMode="alwaysScroll"
android:stackFromBottom="true"
Link to image of current situation
XML:
<android.support.v7.widget.Toolbar
android:id="@+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#1a1a1a"
android:id="@+id/relativeLayout_Messages"
android:layout_below="@id/my_toolbar"
android:layout_alignBottom="@+id/imageView_Separator">
<ListView
android:id="@+id/listView_Messages"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:stackFromBottom="true"
/>
</RelativeLayout>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/imageView_Separator"
android:background="#1a1a1a"
android:src="@drawable/seperator"
android:layout_above="@+id/relativeLayout_ChatInput"
/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:id="@+id/relativeLayout_ChatInput"
android:background="#1a1a1a">
<EditText
android:layout_width="wrap_content"
android:layout_height="50dp"
android:id="@+id/editText_ChatInput"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_marginStart="5dp"
android:background="@drawable/search_field"
android:layout_toStartOf="@+id/imageButton_Send"
android:layout_alignBottom="@+id/imageButton_Send"
android:inputType="textPersonName"
android:hint="@string/chat_field_hint"
android:textColor="#f4f5f6"
android:textColorHint="#f4f5f6"/>
<ImageButton
android:layout_width="32dp"
android:layout_height="32dp"
android:id="@+id/imageButton_Send"
android:background="@android:color/transparent"
android:src="@drawable/send_button"
android:scaleType="fitCenter"
android:layout_marginTop="10dp"
android:layout_marginStart="10dp"
android:layout_marginEnd="6dp"
android:layout_marginBottom="8dp"
android:layout_alignParentEnd="true"
android:onClick="sendButtonClicked"
/>
</RelativeLayout>
</RelativeLayout>
JAVA
package com.example.muhryn.resonatem;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.content.Context;
import android.view.inputmethod.InputMethodManager;
import android.widget.*;
import java.util.*;
public class ChatActivity extends AppCompatActivity{
public void hideKeyboard() {
try {
InputMethodManager imm=(InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(this.getCurrentFocus().getWindowToken(), 0);
} catch (Exception ex) { }
}
private ListView chatListView;
private Button submitButton;
private EditText chatEditText;
private Chat chat;
private ArrayList receivedList=new ArrayList();
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
chatListView=(ListView)findViewById(R.id.listView_Messages);
chatEditText=(EditText)findViewById(R.id.editText_ChatInput);
chat=new Chat("A","Resonate");
chat.setListener(new Chat.Listener(){
public void received(final String received) {
System.out.println("Received: "+received);
runOnUiThread(new Runnable() {
public void run() {
hideKeyboard();
receivedList.add(0, received);
chatListView.setAdapter(new ChatList(ChatActivity.this, receivedList));
}
});
//////((ArrayAdapter)chatListView.getAdapter()).insert(received,0);
}
});
}
public void sendButtonClicked(View view){
String textToSubmit=chatEditText.getText().toString().trim();
if(textToSubmit.isEmpty())
return;
if(chat.submitted(textToSubmit)) {
receivedList.add(0,"Sent: "+textToSubmit);
chatListView.setAdapter(new ChatList(ChatActivity.this, receivedList));
} else
Toast.makeText(this,"Failed to submit "+textToSubmit+".",Toast.LENGTH_SHORT).show();
}
@Override
public void onStop () {
super.onStop();
chat.stop();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.chat_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.view_profile:
finish();
return true;
case R.id.report_match:
finish();
return true;
case R.id.add_match:
finish();
return true;
case R.id.unmatch:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
