Slawek: Created page with "* Create a new Android Virtual Device (AVD) * Create a new Android application project * Run and see the behavior * Check out src/com.example..., res/layout and res/valu..."

2014-06-23T09:22:12Z

Created page with "* Create a new Android Virtual Device (AVD) * Create a new Android application project * Run and see the behavior * Check out src/com.example..., res/layout and res/valu..."

New page

* Create a new Android Virtual Device (AVD)

* Create a new Android application project

* Run and see the behavior

* Check out src/com.example..., res/layout and res/values

* Make the layout linear and remove the text-box

* Add a button and an edit text with the following spec

<EditText
android:id="@+id/edit_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="@string/enter_text" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_text" />

* Add a method name (e.g., sendMessage) to handle the OnClick event of the button

android:onClick="sendMessage"

* Add sendMessage to src/MainActivity

public void sendMessage(View view) {
}

* Include android.view.View (Ctrl+Shift+o)

* Add to the body of sendMessage:

Intent intent = new Intent(this, ShowMessage.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);

and to the class MainActivity:

public final static String EXTRA_MESSAGE = "com.example.helloworld.MESSAGE";

* Add a new activity (New | Other| Activity)

* Add the following declarations to the new activity's onCreate():

Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);

TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);

== [[PA 8001 Ed 2013|Back to Embedded Systems Programming]] ==

Java Android Hello World Instructions - Revision history

Slawek: Created page with "* Create a new Android Virtual Device (AVD) * Create a new Android application project * Run and see the behavior * Check out src/com.example..., res/layout and res/valu..."