(转)圆形头像制作

首先创建一个继承ImageView的抽象类MaskedImage。让他重写onDraw方法。代码如下

[java] view plaincopyprint?

1. public abstract class MaskedImage extends ImageView {
2. private static final Xfermode MASK_XFERMODE;
3. private Bitmap mask;
4. private Paint paint;
5. static {
6. PorterDuff.Mode localMode = PorterDuff.Mode.DST_IN;
7. MASK_XFERMODE = new PorterDuffXfermode(localMode);
8. }
9. public MaskedImage(Context paramContext) {
10. super(paramContext);
11. }
12. public MaskedImage(Context paramContext, AttributeSet paramAttributeSet) {
13. super(paramContext, paramAttributeSet);
14. }
15. public MaskedImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
16. super(paramContext, paramAttributeSet, paramInt);
17. }
18. public abstract Bitmap createMask();
19. protected void onDraw(Canvas paramCanvas) {
20. Drawable localDrawable = getDrawable();
21. if (localDrawable == null)
22. return;
23. try {
24. if (this.paint == null) {
25. Paint localPaint1 = new Paint();
26. this.paint = localPaint1;
27. this.paint.setFilterBitmap(false);
28. Paint localPaint2 = this.paint;
29. Xfermode localXfermode1 = MASK_XFERMODE;
30. @SuppressWarnings("unused")
31. Xfermode localXfermode2 = localPaint2.setXfermode(localXfermode1);
32. }
33. float f1 = getWidth();
34. float f2 = getHeight();
35. int i = paramCanvas.saveLayer(0.0F, 0.0F, f1, f2, null, 31);
36. int j = getWidth();
37. int k = getHeight();
38. localDrawable.setBounds(0, 0, j, k);
39. localDrawable.draw(paramCanvas);
40. if ((this.mask == null) || (this.mask.isRecycled())) {
41. Bitmap localBitmap1 = createMask();
42. this.mask = localBitmap1;
43. }
44. Bitmap localBitmap2 = this.mask;
45. Paint localPaint3 = this.paint;
46. paramCanvas.drawBitmap(localBitmap2, 0.0F, 0.0F, localPaint3);
47. paramCanvas.restoreToCount(i);
48. return;
49. } catch (Exception localException) {
50. StringBuilder localStringBuilder = new StringBuilder()
51. .append("Attempting to draw with recycled bitmap. View ID = ");
52. System.out.println("localStringBuilder=="+localStringBuilder);
53. }
54. }
55. }

public abstract class MaskedImage extends ImageView {
	private static final Xfermode MASK_XFERMODE;
	private Bitmap mask;
	private Paint paint;

	static {
		PorterDuff.Mode localMode = PorterDuff.Mode.DST_IN;
		MASK_XFERMODE = new PorterDuffXfermode(localMode);
	}

	public MaskedImage(Context paramContext) {
		super(paramContext);
	}

	public MaskedImage(Context paramContext, AttributeSet paramAttributeSet) {
		super(paramContext, paramAttributeSet);
	}

	public MaskedImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
		super(paramContext, paramAttributeSet, paramInt);
	}

	public abstract Bitmap createMask();

	protected void onDraw(Canvas paramCanvas) {
		Drawable localDrawable = getDrawable();
		if (localDrawable == null)
			return;
		try {
			if (this.paint == null) {
				Paint localPaint1 = new Paint();
				this.paint = localPaint1;
				this.paint.setFilterBitmap(false);
				Paint localPaint2 = this.paint;
				Xfermode localXfermode1 = MASK_XFERMODE;
				@SuppressWarnings("unused")
				Xfermode localXfermode2 = localPaint2.setXfermode(localXfermode1);
			}
			float f1 = getWidth();
			float f2 = getHeight();
			int i = paramCanvas.saveLayer(0.0F, 0.0F, f1, f2, null, 31);
			int j = getWidth();
			int k = getHeight();
			localDrawable.setBounds(0, 0, j, k);
			localDrawable.draw(paramCanvas);
			if ((this.mask == null) || (this.mask.isRecycled())) {
				Bitmap localBitmap1 = createMask();
				this.mask = localBitmap1;
			}
			Bitmap localBitmap2 = this.mask;
			Paint localPaint3 = this.paint;
			paramCanvas.drawBitmap(localBitmap2, 0.0F, 0.0F, localPaint3);
			paramCanvas.restoreToCount(i);
			return;
		} catch (Exception localException) {
			StringBuilder localStringBuilder = new StringBuilder()
					.append("Attempting to draw with recycled bitmap. View ID = ");
			System.out.println("localStringBuilder=="+localStringBuilder);
		}
	}
}

然后新建一个类CircularImage继承MaskedImage。代码如下：

[java] view plaincopyprint?

1. <SPAN style="FONT-SIZE: 14px">public class CircularImage extends MaskedImage {
2. public CircularImage(Context paramContext) {
3. super(paramContext);
4. }
5. public CircularImage(Context paramContext, AttributeSet paramAttributeSet) {
6. super(paramContext, paramAttributeSet);
7. }
8. public CircularImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
9. super(paramContext, paramAttributeSet, paramInt);
10. }
11. public Bitmap createMask() {
12. int i = getWidth();
13. int j = getHeight();
14. Bitmap.Config localConfig = Bitmap.Config.ARGB_8888;
15. Bitmap localBitmap = Bitmap.createBitmap(i, j, localConfig);
16. Canvas localCanvas = new Canvas(localBitmap);
17. Paint localPaint = new Paint(1);
18. localPaint.setColor(-16777216);
19. float f1 = getWidth();
20. float f2 = getHeight();
21. RectF localRectF = new RectF(0.0F, 0.0F, f1, f2);
22. localCanvas.drawOval(localRectF, localPaint);
23. return localBitmap;
24. }
25. }</SPAN>

public class CircularImage extends MaskedImage {
	public CircularImage(Context paramContext) {
		super(paramContext);
	}

	public CircularImage(Context paramContext, AttributeSet paramAttributeSet) {
		super(paramContext, paramAttributeSet);
	}

	public CircularImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
		super(paramContext, paramAttributeSet, paramInt);
	}

	public Bitmap createMask() {
		int i = getWidth();
		int j = getHeight();
		Bitmap.Config localConfig = Bitmap.Config.ARGB_8888;
		Bitmap localBitmap = Bitmap.createBitmap(i, j, localConfig);
		Canvas localCanvas = new Canvas(localBitmap);
		Paint localPaint = new Paint(1);
		localPaint.setColor(-16777216);
		float f1 = getWidth();
		float f2 = getHeight();
		RectF localRectF = new RectF(0.0F, 0.0F, f1, f2);
		localCanvas.drawOval(localRectF, localPaint);
		return localBitmap;
	}
}

新建一个MainActivity，代码如下：

[java] view plaincopyprint?

1. public class MainActivity extends Activity {
2. @Override
3. protected void onCreate(Bundle savedInstanceState) {
4. super.onCreate(savedInstanceState);
5. setContentView(R.layout.activity_main);
6. CircularImage cover_user_photo = (CircularImage) findViewById(R.id.cover_user_photo);
7. cover_user_photo.setImageResource(R.drawable.face);
8. }
9. }

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		CircularImage cover_user_photo = (CircularImage) findViewById(R.id.cover_user_photo);
		cover_user_photo.setImageResource(R.drawable.face);
	}
}

其XML布局文件为：

[html] view plaincopyprint?

1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
2. xmlns:tools="http://schemas.android.com/tools"
3. android:layout_width="match_parent"
4. android:layout_height="match_parent"
5. android:gravity="center" >
6. <ImageView
7. android:layout_width="82.0dip"
8. android:layout_height="82.0dip"
9. android:layout_centerInParent="true"
10. android:contentDescription="@null"
11. android:src="@drawable/me_head_bg" />
12. <com.doublefi123.diary.widget.CircularImage
13. android:id="@+id/cover_user_photo"
14. android:layout_width="74.0dip"
15. android:layout_height="74.0dip"
16. android:layout_centerInParent="true" />
17. </RelativeLayout>