Android实现图片设置圆角形式
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本文实例为大家分享了Android实现图片设置圆角形式的具体代码，供大家参考，具体内容如下
1.自定义的图片圆角形式CircleImageView类
public class CircleImageView extends ImageView {
private static final Xfermode MASK_XFERMODE;
private Bitmap mask;
private Paint paint;
private int mBorderWidth = 10;
private int mBorderColor = Color.parseColor("#f2f2f2");
private boolean useDefaultStyle = false;
static {
PorterDuff.Mode localMode = PorterDuff.Mode.DST_IN;
MASK_XFERMODE = new PorterDuffXfermode(localMode);
}
public CircleImageView(Context context) {
super(context);
}
public CircleImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircularImage);
mBorderColor = a.getColor(R.styleable.CircularImage_border_color, mBorderColor);
final int def = (int) (2 * context.getResources().getDisplayMetrics().density + 0.5f);
mBorderWidth = a.getDimensionPixelOffset(R.styleable.CircularImage_border_width, def);
a.recycle();
}
private void useDefaultStyle(boolean useDefaultStyle) {
this.useDefaultStyle = useDefaultStyle;
}
@Override
protected void onDraw(Canvas canvas) {
if (useDefaultStyle) {
super.onDraw(canvas);
return;
}
final Drawable localDraw = getDrawable();
if (localDraw == null) {
return;
}
if (localDraw instanceof NinePatchDrawable) {
return;
}
if (this.paint == null) {
final Paint localPaint = new Paint();
localPaint.setFilterBitmap(false);
localPaint.setAntiAlias(true);
localPaint.setXfermode(MASK_XFERMODE);
this.paint = localPaint;
}
final int width = getWidth();
final int height = getHeight();
int layer = canvas.saveLayer(0.0F, 0.0F, width, height, null, 31);
localDraw.setBounds(0, 0, width, height);
localDraw.draw(canvas);
if ((this.mask == null) || (this.mask.isRecycled())) {
this.mask = createOvalBitmap(width, height);
}
canvas.drawBitmap(this.mask, 0.0F, 0.0F, this.paint);
canvas.restoreToCount(layer);
drawBorder(canvas, width, height);
}
private void drawBorder(Canvas canvas, final int width, final int height) {
if (mBorderWidth == 0) {
return;
}
final Paint mBorderPaint = new Paint();
mBorderPaint.setStyle(Paint.Style.STROKE);
mBorderPaint.setAntiAlias(true);
mBorderPaint.setColor(mBorderColor);
mBorderPaint.setStrokeWidth(mBorderWidth);
canvas.drawCircle(width / 2, height / 2, (width - mBorderWidth) / 2, mBorderPaint);
canvas = null;
}
public Bitmap createOvalBitmap(final int width, final int height) {
Bitmap.Config localConfig = Bitmap.Config.ARGB_8888;
Bitmap localBitmap = Bitmap.createBitmap(width, height, localConfig);
Canvas localCanvas = new Canvas(localBitmap);
Paint localPaint = new Paint();
final int padding = (mBorderWidth - 3) > 0 ? mBorderWidth - 3 : 1;
RectF localRectF = new RectF(padding, padding, width - padding, height - padding);
localCanvas.drawOval(localRectF, localPaint);
return localBitmap;
}
}1.1 在values目录下创建一个circle_attr.xml，文件内容：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CircularImage">
<attr name="border_width" format="dimension" />
<attr name="border_color" format="color" />
</declare-styleable>
</resources>如下图：
2.activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:class="lazy" data-src="@drawable/ic_sp" />
<com.demo.test.bitmap.CircleImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginLeft="50dp"
android:class="lazy" data-src="@drawable/ic_sp" />
</LinearLayout>
</LinearLayout>3.MainActivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}运行后结果：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
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