Android中画bitmap的简单示例

程序效果：读入bitmap的数据流，解码，再画出来：

代码如下：

Java代码

1. packagecom.ray.draw;
3. importjava.io.InputStream;
5. importandroid.app.Activity;
6. importandroid.content.Context;
7. importandroid.graphics.Bitmap;
8. importandroid.graphics.BitmapFactory;
9. importandroid.graphics.Canvas;
10. importandroid.graphics.Paint;
11. importandroid.os.Bundle;
12. importandroid.view.View;
14. publicclassTestDrawBitmapextendsActivity{
15. publicvoidonCreate(BundlesavedInstanceState){
16. super.onCreate(savedInstanceState);
17. setContentView(newmyView(this));
18. }
19. }
20. classmyViewextendsView{
22. publicmyView(Contextcontext){
23. super(context);
24. }
25. protectedvoidonDraw(Canvascanvas){
26. super.onDraw(canvas);
27. //readtheicon.pngintobuffer
28. InputStreamis=getResources().openRawResource(R.drawable.icon);
29. //decode
30. BitmapmBitmap=BitmapFactory.decodeStream(is);
31. PaintmPaint=newPaint();
32. canvas.drawBitmap(mBitmap,40,40,mPaint);
33. }
35. }