Android圖像相關

badboy1110知識,首先是Bitmap：

從資源文件中得到bitmap有兩種方式：

一：

1. Resources r = getResources();
2. InputStream is = r.openRawResource(R.drawable.icon);
3. BitmapDrawable bmpDraw = new BitmapDrawable(is);
4. Bitmap bmp1 = bmpDraw.getBitmap();

1. BitmapDrawable drawable = (BitmapDrawable)r.getDrawable(R.drawable.icon)

一下是畫各種圖形，首先寫了一個畫圖形的接口：

1. package com.song.ui;
3. import Android.graphics.Canvas;
5. public interface drawGraphics
6. {
7. public void draw(Canvas canvas);
8. }

畫線：

1. package com.song.ui;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
7. /**
8. * 畫線
9. * @author song
10. *
11. */
12. public class DrawLine implements drawGraphics
13. {
14. //聲明一個畫筆
15. private Paint mPaint;
17. public DrawLine()
18. {
19. mPaint = new Paint();
20. }
22. @Override
23. public void draw(Canvas canvas)
24. {
25. //消除鋸齒
26. mPaint.setAntiAlias(true);
27. //直線 顏色：綠色
28. mPaint.setColor(Color.GREEN);
29. //設置線條粗細
30. mPaint.setStrokeWidth(12);
31. //畫兩條直線
32. canvas.drawLine(90, 40, 140, 90, mPaint);
33. canvas.drawLine(290, 90, 340, 40, mPaint);
34. }
35. }

1. package com.song.ui;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
6. import android.graphics.RectF;
8. /**
9. * 畫圓
10. * @author song
11. *
12. */
13. public class DrawCircle implements drawGraphics
14. {
15. private Paint paint ;
16. private Paint paint_eye;
18. public DrawCircle()
19. {
20. paint= new Paint();
21. paint_eye=new Paint();
22. }
24. @Override
25. public void draw(Canvas canvas)
26. {
27. //繪制圓形（圓心X，圓心Y，半徑R，畫筆P）
28. paint_eye.setAntiAlias(true);
29. paint.setAntiAlias(true);
30. RectF rectF= new RectF(90, 60, 340, 240);
31. paint_eye.setColor(Color.WHITE);
32. paint.setColor(Color.GREEN);
33. canvas.drawArc(rectF, 180, 180, true, paint);
34. //畫兩個眼睛
35. canvas.drawCircle(160, 110, 18, paint_eye);
36. canvas.drawCircle(270, 110, 18, paint_eye);
37. }
39. }

1. package com.song.ui;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
6. import android.graphics.RectF;
8. /**
9. * 畫矩形
10. *
11. * @author song
12. *
13. */
14. public class DrawRect implements drawGraphics
15. {
16. private Paint paint;
18. public DrawRect()
19. {
20. paint = new Paint();
21. }
23. @Override
24. public void draw(Canvas canvas)
25. {
26. // 定義圓角矩形對象
27. RectF rectF1 = new RectF(90, 170, 340, 500);
28. RectF rectF2 = new RectF(10, 150, 60, 400);
29. RectF rectF3 = new RectF(360, 150, 410, 400);
30. RectF rectF4 = new RectF(110, 520, 170, 650);
31. RectF rectF5 = new RectF(260, 520, 320, 650);
32. paint.setAntiAlias(true);
33. // 設置畫筆顏色為BLUE
34. paint.setColor(Color.GREEN);
35. // 在畫布上繪制圓角矩形/圓弧/直線
36. canvas.drawRoundRect(rectF1, 20, 20, paint);
37. canvas.drawRoundRect(rectF2, 20, 20, paint);
38. canvas.drawRoundRect(rectF3, 20, 20, paint);
39. canvas.drawRoundRect(rectF4, 20, 20, paint);
40. canvas.drawRoundRect(rectF5, 20, 20, paint);
41. }
43. }

工程名：TL03_graphics_test