嘗試這樣的事情,它爲我工作!
在XML地方
這一習俗RoundImage:
<com.example.hkh.learningandroid.RoundedImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:src="@drawable/person"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:id="@+id/MyImageView" />
,並創建新的類並將其命名爲RoundImageView:
public class RoundedImageView extends ImageView {
public RoundedImageView(Context ctx, AttributeSet attrs) {
super(ctx, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}
Bitmap b = ((BitmapDrawable) drawable).getBitmap();
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
int w = getWidth(), h = getHeight();
Bitmap roundBitmap = getRoundedCroppedBitmap(bitmap, w);
canvas.drawBitmap(roundBitmap, 0, 0, null);
}
public static Bitmap getRoundedCroppedBitmap(Bitmap bitmap, int radius) {
Bitmap finalBitmap;
if (bitmap.getWidth() != radius || bitmap.getHeight() != radius)
finalBitmap = Bitmap.createScaledBitmap(bitmap, radius, radius,
false);
else
finalBitmap = bitmap;
Bitmap output = Bitmap.createBitmap(finalBitmap.getWidth(),
finalBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, finalBitmap.getWidth(),
finalBitmap.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(finalBitmap.getWidth()/2 + 0.7f,
finalBitmap.getHeight()/2 + 0.7f,
finalBitmap.getWidth()/2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(finalBitmap, rect, rect, paint);
return output;
}
}
和運行,我希望這會有所幫助,它會得到所需要的圓你想要的圖像
'「...不顯示圖片。」'圖片?什麼圖片? – pskink
這個覆蓋圖背後有一個圖像....我試圖顯示白色圓圈內的圖片也試圖隱藏圖像的白圈覆蓋圖中出現的區域,以默認的bg顏色隱藏。 –
圖片?你的意思是ImageView? – pskink