Implement DisplayMessage activity:

- Define class for DisplayMessage activity
  - Activity creates ad-hoc TextView for message output
  - Create Intent on method call from button click
  - Transfer data to new activity, display TextView

AndroidManifest.xml

@@ -11,5 +11,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+          android:name=".DisplayMessageActivity"
+          android:label="@string/title_activity_display_message" >
+          <meta-data
+            android:name="android.support.PARENT_ACTIVITY"
+            android:value="com.jinfield.sampleapp.MainActivity" />
+        </activity>
     </application>
 </manifest>

res/values/strings.xml

@@ -5,4 +5,5 @@
     <string name="button_send">Send</string>
     <string name="menu_settings">Settings</string>
     <string name="title_activity_main">MainActivity</string>
+    <string name="title_activity_display_message">DisplayMessageActivity</string>
 </resources>

src/com/jinfield/sampleapp/DisplayMessageActivity.java

@@ -0,0 +1,25 @@
+package com.jinfield.sampleapp;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.content.Intent;
+import android.widget.TextView;
+
+public class DisplayMessageActivity extends Activity {
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+
+    // Recieve message from the intent
+    Intent intent = getIntent();
+    String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
+
+    // Create TextView
+    TextView textView = new TextView(this);
+    textView.setTextSize(40);
+    textView.setText(message);
+
+    // Set textView as activity layout
+    setContentView(textView);
+  }
+}

src/com/jinfield/sampleapp/MainActivity.java

@@ -3,9 +3,13 @@ package com.jinfield.sampleapp;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
+import android.content.Intent;
+import android.widget.EditText;
 
 public class MainActivity extends Activity
 {
+    public final static String EXTRA_MESSAGE = "com.jinfield.sampleapp.MESSAGE";
+
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState)
@@ -15,6 +19,10 @@ public class MainActivity extends Activity
     }
     /** Called whe user clicks the send Button */
     public void sendMessage(View view) {
-      // TODO
+      Intent intent = new Intent(this, DisplayMessageActivity.class);
+      EditText editText = (EditText) findViewById(R.id.edit_message);
+      String message = editText.getText().toString();
+      intent.putExtra(EXTRA_MESSAGE, message);
+      startActivity(intent);
     }
 }