وهذا ملف ال Manifest وهذا ملف الجافا Mainactivty package com.esoodevelop.genedyonlin; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.text.TextUtils; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); AlertDialog dialog = new AlertDialog.Builder(this).create(); final EditText editText = new EditText(this); dialog.setTitle("ادخل اسمك"); dialog.setView(editText); dialog.setButton(DialogInterface.BUTTON_POSITIVE, "ok", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String name = editText.getText().toString(); if (!TextUtils.isEmpty(name)) { Intent intent = new Intent(MainActivity.this,ChateRoom.class); intent.putExtra("Name",