Screen with Button and graphics area

[luigifonti]

As novice Android developer, I am trying to accomplish a simple task:

create a screen with bot a Button and a graphics area in which I should be able

to draw geometric shapes, bitmaps...

 

Following some suggestions I have built an application with this type of

source code and main.xml file :

 

--------------------------------------------------------

package com.marimba;

 

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.content.Context;

import android.graphics.Paint;

import android.graphics.Canvas;

import android.graphics.Color;

 

public class Marimba extends Activity

{

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

}

 

class MyView extends View

{

public MyView(Context context) {

super(context);

}

 

@Override

protected void onDraw(Canvas c) {

super.onDraw©;

Paint paint = new Paint();

paint.setStyle(Paint.Style.FILL);

paint.setColor(Color.BLACK);

c.drawPaint(paint);

 

// draw a circle

paint.setAntiAlias(true);

paint.setColor(Color.YELLOW);

c.drawCircle(230, 90, 40, paint);

}

}

}

 

.-----------------------------------------------------------

 

android:id="@+id/widget0"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

xmlns:android="http://schemas.android.com/apk/res/android"

>

android:id="@+id/action"

android:layout_width="160px"

android:layout_height="50px"

android:text="Action"

android:layout_x="80px"

android:layout_y="330px"

/>

android:id="@+id/myview"

android:layout_width="303px"

android:layout_height="336px"

android:layout_x="9px"

android:layout_y="8px"

/>

-------------------------------------------------------------

 

Well, the application compiles without error/warnings,

but when launched (bot on emulator or on device),

it shows an error message:

 

Sorry.

Unexpected interruption of application Marimba

(process com.marimba).

Retry.

 

Can you suggest another way to have the result I need ?

Thank you