First steps - Revision history

George2 at 12:07, 5 October 2017

2017-10-05T12:07:29Z

George2 at 12:03, 5 October 2017

2017-10-05T12:03:36Z

George2 at 16:35, 4 October 2017

2017-10-04T16:35:42Z

George2 at 15:51, 4 October 2017

2017-10-04T15:51:33Z

George2 at 15:51, 4 October 2017

2017-10-04T15:51:19Z

George2: Created page with "Simple first program
1. choose empty activity
2. we will edit activity_main.xml and MainActivity.java
3. use api level 16
4. Get rid of "hello world" 5. Drag..."

2017-09-29T14:25:44Z

Created page with "Simple first program 1. choose empty activity 2. we will edit activity_main.xml and MainActivity.java 3. use api level 16 4. Get rid of "hello world" 5. Drag..."

New page

Simple first program 
1. choose empty activity 
2. we will edit activity_main.xml and MainActivity.java 
3. use api level 16 
4. Get rid of "hello world"
5. Drag button 
6 width = match parent, change background colour 
7 changethe id of the button and also the text 

8 onclick property, speccify the name of method 
9. public void toDo(View v){ 
} 
in oncreate 
buttonBlue = (Button) findViewById(R.id.button_blueinvisible) 
define button in main activity 
if ( v.equlas(buttonblue)) then do the stuff 
Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT.show())

@@ Line 62: / Line 62: @@
+     }
+}
 </source>

← Older revision		Revision as of 12:03, 5 October 2017
Line 17:		Line 17:
	if ( v.equlas(buttonblue)) then do the stuff<br>		if ( v.equlas(buttonblue)) then do the stuff<br>
	Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT).show();<br>		Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT).show();<br>
		+
		+	Below is the code from the coursera site <br>
		+	<source lang="java">
		+	package fr.centralesupelec.galtier.block01;
		+
		+	import android.support.v7.app.AppCompatActivity;
		+	import android.os.Bundle;
		+	import android.view.View;
		+	import android.widget.Button;
		+	import android.widget.Toast;
		+
		+	public class MainActivity extends AppCompatActivity {
		+
		+	// the 2 buttons defined in the activity_main.xml file
		+	Button buttonBlue, buttonPink;
		+
		+	@Override
		+	protected void onCreate(Bundle savedInstanceState) {
		+	super.onCreate(savedInstanceState);
		+
		+	// display the GUI defined in the activity_main.xml file
		+	setContentView(R.layout.activity_main);
		+
		+	// retrieve references to the Views defined in the activity_main.xml
		+	buttonBlue = (Button) findViewById(R.id.button_blueInvisible);
		+	buttonPink = (Button) findViewById(R.id.button_pinkPanther);
		+	}
		+
		+	/**
		+	* called when a button from activity_main.xml is clicked
		+	* @param v the View which triggered the method call: should refer to buttonBlue or buttonPink
		+	*/
		+	public void toDo(View v) {
		+	if (v.equals(buttonBlue))
		+	// buttonBlue was clicked
		+	// turn the button invisible
		+	v.setVisibility(View.INVISIBLE);
		+	if (v.equals(buttonPink))
		+	// buttonPink was clicked
		+	// display a pop-up message for a short duration
		+	Toast.makeText(getApplicationContext(),
		+	"to do to do to do...",
		+	Toast.LENGTH_SHORT).show();
		+	}
		+	}
		+
		+	</source>

@@ Line 16: / Line 16: @@
 define button in main activity<br>
 if ( v.equlas(buttonblue))  then do the stuff<br>
-Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT.show())
+Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT).show();<br>

@@ Line 12: / Line 12: @@
                             }<br>
 in oncreate<br>
-button buttonblue;<br>
+Button buttonblue;<br>
 buttonBlue = (Button) findViewById(R.id.button_blueinvisible);<br>
 define button in main activity<br>
 if ( v.equlas(buttonblue))  then do the stuff<br>
 Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT.show())

@@ Line 12: / Line 12: @@
                             }<br>
 in oncreate<br>
-buttonBlue = (Button) findViewById(R.id.button_blueinvisible)<br>
+button buttonblue;<br>
 define button in main activity<br>
 if ( v.equlas(buttonblue))  then do the stuff<br>
 Toast.makeText(getApplicationcontext(), "asdfadsfa", Toast.LENGTH_SHORT.show())

First steps - Revision history

George2 at 12:07, 5 October 2017

George2 at 12:03, 5 October 2017

George2 at 16:35, 4 October 2017

George2 at 15:51, 4 October 2017

George2 at 15:51, 4 October 2017

George2: Created page with "Simple first program 1. choose empty activity 2. we will edit activity_main.xml and MainActivity.java 3. use api level 16 4. Get rid of "hello world" 5. Drag..."

George2: Created page with "Simple first program
1. choose empty activity
2. we will edit activity_main.xml and MainActivity.java
3. use api level 16
4. Get rid of "hello world" 5. Drag..."