Android Development masterclass

Drawing a bitmap image
The android.graphics package provides BitMap and BitMapFactory classes to work with bitmaps (ie images comprising a map or array of bits) inside an Android application. Bitmaps can be read by using the following method:

Bitmap penguinBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.penguins);
canvas.drawBitmap(penguinBitmap, 0, 0,null);

In the following code example, we are drawing a .bmp file into a view and loading this instead of the main layout. To run this app, copy drag the  file penguins.bmp to the res/drawable-ldpi folder in Eclipse (or MOTODEV Studio). You can also copy the same into the other resource folder depending upon the devices you support.

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 //setContentView(R.layout.main);
 setContentView(new bitmapView(this));
 }

 private class bitmapView extends View{

 public bitmapView(Context context) {
 super(context);
 // TODO Auto-generated constructor stub
 }

 @Override
 protected void onDraw(Canvas canvas){
 Bitmap penguinBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.penguins);
 canvas.drawBitmap(penguinBitmap, 0, 0,null);
 }
 }

}