Changed to new version

app/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "io.testproject.demo"
         minSdkVersion 15
@@ -20,6 +20,7 @@ android {
 }
 
 dependencies {
+    implementation 'com.android.support:design:25.4.0'
     compile fileTree(dir: 'libs', include: ['*.jar'])
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'

app/src/main/AndroidManifest.xml

@@ -9,13 +9,13 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
-
             <intent-filter android:label="@string/main_activity_title">
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".ProfileActivity"></activity>
     </application>
 
 </manifest>

app/src/main/java/io/testproject/demo/MainActivity.java

@@ -1,10 +1,16 @@
 package io.testproject.demo;
 
+import android.content.BroadcastReceiver;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbManager;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.text.Editable;
 import android.text.TextWatcher;
+import android.view.KeyEvent;
 import android.view.View;
+import android.view.inputmethod.EditorInfo;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.EditText;
@@ -17,59 +23,53 @@
 
 public class MainActivity extends AppCompatActivity {
 
-    private EditText firstName;
-    private EditText lastName;
-    private TextView fullName;
-    private TextView welcome;
-
-    private List<String> names;
-    private ArrayAdapter<String> namesAdapter;
+    private EditText txtName;
+    private EditText txtPassword;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
         // Acquire references to UI widgets
-        this.firstName = (EditText) findViewById(R.id.firstName);
-        this.lastName = (EditText) findViewById(R.id.lastName);
-        this.fullName = (TextView) findViewById(R.id.fullName);
-
-        // Update Full Name when First/Last names change
-        this.firstName.addTextChangedListener(getFullNameTextWatcher());
-        this.lastName.addTextChangedListener(getFullNameTextWatcher());
+        this.txtName = (EditText) findViewById(R.id.name);
+        this.txtPassword = (EditText) findViewById(R.id.password);
 
-        // Setup Persons ListView
-        this.names = new ArrayList<>();
-        namesAdapter =
-                new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, names);
-        ListView listView = (ListView) findViewById(R.id.persons);
-        listView.setAdapter(namesAdapter);
+        // Submit when password provided
+        txtPassword.setOnEditorActionListener(new TextView.OnEditorActionListener() {
+            @Override
+            public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
+                if (actionId == EditorInfo.IME_ACTION_DONE) {
+                    performLogin(null);
+                    return true;
+                }
+                return false;
+            }});
     }
 
-    public void addPerson(View view) {
-        names.add(fullName.getText().toString());
-        namesAdapter.notifyDataSetInvalidated();
-
+    public void performLogin(View view) {
+        boolean hasErrors = false;
+
+        if (txtName.getText().length() == 0) {
+            txtName.setError("Please provide your name");
+            hasErrors = true;
+        } else {
+            txtName.setError(null);
+        }
+
+        if (!txtPassword.getText().toString().equals("12345")) {
+            txtPassword.setError("This password is incorrect");
+            hasErrors = true;
+        } else {
+            txtPassword.setError(null);
+        }
+
+        if (!hasErrors) {
+            Intent intent = new Intent(MainActivity.this,ProfileActivity.class);
+            intent.putExtra("FULL_NAME", txtName.getText().toString());
+            startActivity(intent);
+        }
     }
 
-    private TextWatcher getFullNameTextWatcher() {
-        return new TextWatcher() {
-            @Override
-            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-
-            }
 
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-
-                fullName.setText(firstName.getText() + " " + lastName.getText());
-            }
-
-            @Override
-            public void afterTextChanged(Editable s) {
-
-            }
-        };
-    }
 }

app/src/main/java/io/testproject/demo/ProfileActivity.java

@@ -0,0 +1,93 @@
+package io.testproject.demo;
+
+import android.content.Intent;
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.text.SpannableString;
+import android.text.style.StyleSpan;
+import android.text.style.UnderlineSpan;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.EditText;
+import android.widget.Spinner;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Locale;
+
+public class ProfileActivity extends AppCompatActivity {
+
+    private TextView lblGreetings;
+    private EditText txtCountry;
+    private EditText txtAddress;
+    private EditText txtEmail;
+    private EditText txtPhone;
+    private TextView txtSaved;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_profile);
+
+        // Acquire references to UI widgets
+        this.lblGreetings = (TextView) findViewById(R.id.greetings);
+        this.txtCountry = (EditText) findViewById(R.id.country);
+        this.txtAddress = (EditText) findViewById(R.id.address);
+        this.txtEmail = (EditText) findViewById(R.id.email);
+        this.txtPhone = (EditText) findViewById(R.id.phone);
+        this.txtSaved = (TextView) findViewById(R.id.saved);
+
+        // Say Hi
+        String greetings = "Hello " + getIntent().getStringExtra("FULL_NAME");
+        SpannableString spanString = new SpannableString(greetings);
+        spanString.setSpan(new StyleSpan(Typeface.BOLD), 0, spanString.length(), 0);
+        lblGreetings.setText(spanString);
+
+    }
+
+    public void performLogout(View view) {
+        startActivity(new Intent(ProfileActivity.this,MainActivity.class));
+    }
+
+    public void performSave(View view) {
+
+        txtSaved.setVisibility(View.GONE);
+        boolean hasErrors = false;
+
+        if (txtCountry.getText().length() == 0) {
+            txtCountry.setError("Please enter your country");
+            hasErrors = true;
+        } else {
+            txtCountry.setError(null);
+        }
+
+        if (txtAddress.getText().length() == 0) {
+            txtAddress.setError("Please enter your address");
+            hasErrors = true;
+        } else {
+            txtAddress.setError(null);
+        }
+
+        if (txtEmail.getText().length() == 0) {
+            txtEmail.setError("Please enter your email");
+            hasErrors = true;
+        } else {
+            txtEmail.setError(null);
+        }
+
+        if (txtPhone.getText().length() == 0) {
+            txtPhone.setError("Please enter your phone number");
+            hasErrors = true;
+        } else {
+            txtPhone.setError(null);
+        }
+
+        if (!hasErrors) {
+            txtSaved.setVisibility(View.VISIBLE);
+        }
+    }
+}