我想让任何图像从我的ImageView是圆形的边界。
我搜索了一下,但没有找到任何有用的信息(我尝试的任何方法都不管用)。
如何通过XML实现这一点: 创建一个ImageView与某些src,并使它与边界圆形?
我想让任何图像从我的ImageView是圆形的边界。
我搜索了一下,但没有找到任何有用的信息(我尝试的任何方法都不管用)。
如何通过XML实现这一点: 创建一个ImageView与某些src,并使它与边界圆形?
当前回答
试试这个。
public class RoundedImageView extends android.support.v7.widget.AppCompatImageView {
private int borderWidth = 4;
private int viewWidth;
private int viewHeight;
private Bitmap image;
private Paint paint;
private Paint paintBorder;
private BitmapShader shader;
public RoundedImageView(Context context)
{
super(context);
setup();
}
public RoundedImageView(Context context, AttributeSet attrs)
{
super(context, attrs);
setup();
}
public RoundedImageView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
setup();
}
private void setup()
{
paint = new Paint();
paint.setAntiAlias(true);
paintBorder = new Paint();
setBorderColor(Color.WHITE);
paintBorder.setAntiAlias(true);
this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);
paintBorder.setShadowLayer(4.0f, 0.0f, 2.0f, Color.WHITE);
}
public void setBorderWidth(int borderWidth)
{
this.borderWidth = borderWidth;
this.invalidate();
}
public void setBorderColor(int borderColor)
{
if (paintBorder != null)
paintBorder.setColor(borderColor);
this.invalidate();
}
private void loadBitmap()
{
BitmapDrawable bitmapDrawable = (BitmapDrawable) this.getDrawable();
if (bitmapDrawable != null)
image = bitmapDrawable.getBitmap();
}
@SuppressLint("DrawAllocation")
@Override
public void onDraw(Canvas canvas)
{
loadBitmap();
if (image != null)
{
shader = new BitmapShader(Bitmap.createScaledBitmap(image, canvas.getWidth(), canvas.getHeight(), false), Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
paint.setShader(shader);
int circleCenter = viewWidth / 2;
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter + borderWidth - 4.0f, paintBorder);
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter - 4.0f, paint);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int width = measureWidth(widthMeasureSpec);
int height = measureHeight(heightMeasureSpec, widthMeasureSpec);
viewWidth = width - (borderWidth * 2);
viewHeight = height - (borderWidth * 2);
setMeasuredDimension(width, height);
}
private int measureWidth(int measureSpec)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY)
{
result = specSize;
}
else
{
// Measure the text
result = viewWidth;
}
return result;
}
private int measureHeight(int measureSpecHeight, int measureSpecWidth)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpecHeight);
int specSize = MeasureSpec.getSize(measureSpecHeight);
if (specMode == MeasureSpec.EXACTLY)
{
result = specSize;
}
else
{
result = viewHeight;
}
return (result + 2);
}
}
然后在布局中使用这个ImageView:
<com.app.Demo.RoundedImageView
android:id="@+id/iv_profileImage"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_centerHorizontal="true"
/>
其他回答
你可以做一个简单的圆,有白色边框,透明内容的形状。
// res/drawable/circle.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:innerRadius="0dp"
android:shape="ring"
android:thicknessRatio="1.9"
android:useLevel="false" >
<solid android:color="@android:color/transparent" />
<stroke
android:width="10dp"
android:color="@android:color/white" />
</shape>
然后制作一个可绘制的图层列表,并将其作为imageview的背景。
// res/drawable/img.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/circle"/>
<item android:drawable="@drawable/ic_launcher"/>
</layer-list>
把它作为imageview的背景。
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/img"/>
你会得到类似的东西。
@Jyotman Singh,答案非常好(对于坚实的背景),所以我想通过分享可以根据你的需要重新着色的矢量绘图来增强它,而且这很方便,因为矢量整体形状是可伸缩的。
这是矩形-圆形状(@drawable/shape_round_profile_pic):
<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:viewportWidth="284"
android:viewportHeight="284"
android:width="284dp"
android:height="284dp">
<path
android:pathData="M0 142L0 0l142 0 142 0 0 142 0 142 -142 0 -142 0zm165 137.34231c26.06742 -4.1212 52.67405 -17.543 72.66855 -36.65787 11.82805 -11.30768 20.55487 -22.85153 27.7633 -36.72531C290.23789 158.21592 285.62874 101.14121 253.48951 58.078079 217.58149 9.9651706 154.68849 -10.125717 98.348685 8.5190299 48.695824 24.95084 12.527764 67.047123 3.437787 118.98655 1.4806194 130.16966 1.511302 152.96723 3.4990422 164.5 12.168375 214.79902 47.646316 256.70775 96 273.76783c21.72002 7.66322 44.26673 9.48476 69 5.57448z"
android:fillColor="#ffffff" /> // you can change frame color
</vector>
用法是一样的:
<FrameLayout
android:layout_width="70dp"
android:layout_height="70dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/YOUR_PICTURE" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/shape_round_profile_pic"/>
</FrameLayout>
最佳解决方案https://www.youtube.com/watch?v=0MHoNU7ytaw 卡视图的宽度和高度决定了它所包含图像的大小设置如下:
向Gradle添加依赖项(模块) 将xml代码添加到activity.xml或fragment.xml文件中
implementation 'androidx.cardview:cardview:1.0.0'
<androidx.cardview.widget.CardView
android:layout_width="300dp"
android:layout_height="270dp"
android:layout_gravity="center"
app:cardCornerRadius="150dp"
app:cardBackgroundColor="@color/trans"
>
<ImageView
android:id="@+id/resultImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/congrats"
android:layout_gravity="center">
</ImageView>
</androidx.cardview.widget.CardView>```
如果你在应用中使用材质设计,那么就使用这个
<com.google.android.material.card.MaterialCardView
android:layout_width="75dp"
android:layout_height="75dp"
app:cardCornerRadius="50dp"
app:strokeWidth="1dp"
app:strokeColor="@color/black">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/circular_image"
android:scaleType="fitCenter"
android:src="@drawable/your_img" />
</com.google.android.material.card.MaterialCardView>
下面是最简单的方法之一,使用以下代码:
依赖关系
dependencies {
...
compile 'de.hdodenhof:circleimageview:2.1.0' // use this or use the latest compile version. In case u get bug.
}
XML代码
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/profile_image"
android:layout_width="96dp" // here u can adjust the width
android:layout_height="96dp" // here u can adjust the height
android:src="@drawable/profile" // here u can change the image
app:civ_border_width="2dp" // here u can adjust the border of the circle.
app:civ_border_color="#FF000000"/> // here u can adjust the border color
截图:
来源:Circular ImageView GitHub Repository