(转)圆形头像制作

标签：des   android   style   blog   http   color   io   java   ar   

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

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：

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：

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：

(转)圆形头像制作

标签：des   android   style   blog   http   color   io   java   ar   

原文地址：http://www.cnblogs.com/iyuge/p/3988756.html