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
另一种不使用任何库的方法是使用ImageFilterView，并设置视图的圆百分比将使圆
app: roundPercent =“1”
<androidx.constraintlayout.utils.widget.ImageFilterView
android:id="@+id/ivProfile"
android:layout_width="150dp"
android:layout_height="150dp"
android:src="@drawable/custom_button_1"
app:roundPercent="1"
android:scaleType="fitXY"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="@+id/etName"/>
其他回答
实际上，你可以使用谷歌提供的支持库RoundedBitmapDrawableFactory类(这里和这里)，而不是使用第三方库:
Gradle:
implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
MainActivity.kt
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val originalDrawable = ContextCompat.getDrawable(this, R.drawable.avatar_1)!!
val bitmap = convertDrawableToBitmap(originalDrawable)
val drawable = RoundedBitmapDrawableFactory.create(resources, bitmap)
drawable.setAntiAlias(true)
drawable.cornerRadius = Math.max(bitmap.width, bitmap.height) / 2.0f
avatarImageView.setImageDrawable(drawable)
}
companion object {
@JvmStatic
fun convertDrawableToBitmap(drawable: Drawable): Bitmap {
if (drawable is BitmapDrawable)
return drawable.bitmap
// We ask for the bounds if they have been set as they would be most
// correct, then we check we are > 0
val bounds = drawable.bounds
val width = if (!bounds.isEmpty) bounds.width() else drawable.intrinsicWidth
val height = if (!bounds.isEmpty) bounds.height() else drawable.intrinsicHeight
// Now we check we are > 0
val bitmap = Bitmap.createBitmap(if (width <= 0) 1 else width, if (height <= 0) 1 else height,
Bitmap.Config.ARGB_8888)
val canvas = Canvas(bitmap)
drawable.setBounds(0, 0, canvas.width, canvas.height)
drawable.draw(canvas)
return bitmap
}
}
}
xml res - - activity_main布局。
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context=".MainActivity">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/avatarImageView" android:layout_width="100dp" android:layout_height="100dp"
android:layout_gravity="center"/>
</FrameLayout>
res - drawable avatar_1 xml。
<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="128dp" android:height="128dp"
android:viewportHeight="128.0" android:viewportWidth="128.0">
<path
android:fillColor="#FF8A80" android:pathData="M0 0h128v128h-128z"/>
<path
android:fillColor="#FFE0B2"
android:pathData="M36.3 94.8c6.4 7.3 16.2 12.1 27.3 12.4 10.7,-.3 20.3,-4.7 26.7,-11.6l.2.1c-17,-13.3,-12.9,-23.4,-8.5,-28.6 1.3,-1.2 2.8,-2.5 4.4,-3.9l13.1,-11c1.5,-1.2 2.6,-3 2.9,-5.1.6,-4.4,-2.5,-8.4,-6.9,-9.1,-1.5,-.2,-3 0,-4.3.6,-.3,-1.3,-.4,-2.7,-1.6,-3.5,-1.4,-.9,-2.8,-1.7,-4.2,-2.5,-7.1,-3.9,-14.9,-6.6,-23,-7.9,-5.4,-.9,-11,-1.2,-16.1.7,-3.3 1.2,-6.1 3.2,-8.7 5.6,-1.3 1.2,-2.5 2.4,-3.7 3.7l-1.8 1.9c-.3.3,-.5.6,-.8.8,-.1.1,-.2 0,-.4.2.1.2.1.5.1.6,-1,-.3,-2.1,-.4,-3.2,-.2,-4.4.6,-7.5 4.7,-6.9 9.1.3 2.1 1.3 3.8 2.8 5.1l11 9.3c1.8 1.5 3.3 3.8 4.6 5.7 1.5 2.3 2.8 4.9 3.5 7.6 1.7 6.8,-.8 13.4,-5.4 18.4,-.5.6,-1.1 1,-1.4 1.7,-.2.6,-.4 1.3,-.6 2,-.4 1.5,-.5 3.1,-.3 4.6.4 3.1 1.8 6.1 4.1 8.2 3.3 3 8 4 12.4 4.5 5.2.6 10.5.7 15.7.2 4.5,-.4 9.1,-1.2 13,-3.4 5.6,-3.1 9.6,-8.9 10.5,-15.2m-14.4,-49.8c.9 0 1.6.7 1.6 1.6 0 .9,-.7 1.6,-1.6 1.6,-.9 0,-1.6,-.7,-1.6,-1.6,-.1,-.9.7,-1.6 1.6,-1.6zm-25.7 0c.9 0 1.6.7 1.6 1.6 0 .9,-.7 1.6,-1.6 1.6,-.9 0,-1.6,-.7,-1.6,-1.6,-.1,-.9.7,-1.6 1.6,-1.6z"/>
<path
android:fillColor="#E0F7FA"
android:pathData="M105.3 106.1c-.9,-1.3,-1.3,-1.9,-1.3,-1.9l-.2,-.3c-.6,-.9,-1.2,-1.7,-1.9,-2.4,-3.2,-3.5,-7.3,-5.4,-11.4,-5.7 0 0 .1 0 .1.1l-.2,-.1c-6.4 6.9,-16 11.3,-26.7 11.6,-11.2,-.3,-21.1,-5.1,-27.5,-12.6,-.1.2,-.2.4,-.2.5,-3.1.9,-6 2.7,-8.4 5.4l-.2.2s-.5.6,-1.5 1.7c-.9 1.1,-2.2 2.6,-3.7 4.5,-3.1 3.9,-7.2 9.5,-11.7 16.6,-.9 1.4,-1.7 2.8,-2.6 4.3h109.6c-3.4,-7.1,-6.5,-12.8,-8.9,-16.9,-1.5,-2.2,-2.6,-3.8,-3.3,-5z"/>
<path
android:fillColor="#444" android:pathData="M76.3,47.5 m-2.0, 0 a 2.0,2.0 0 1,1 4.0,0 a2.0,2.0 0 1,1 -4.0,0"/>
<path
android:fillColor="#444" android:pathData="M50.7,47.6 m-2.0, 0 a 2.0,2.0 0 1,1 4.0,0 a2.0,2.0 0 1,1 -4.0,0"/>
<path
android:fillColor="#444"
android:pathData="M48.1 27.4c4.5 5.9 15.5 12.1 42.4 8.4,-2.2,-6.9,-6.8,-12.6,-12.6,-16.4 17.2 1.5 14.1,-9.4 14.1,-9.4,-1.4 5.5,-11.1 4.4,-11.1 4.4h-18.8c-1.7,-.1,-3.4 0,-5.2.3,-12.8 1.8,-22.6 11.1,-25.7 22.9 10.6,-1.9 15.3,-7.6 16.9,-10.2z"/>
</vector>
结果:
并且，假设你想在它上面添加一个边框，你可以使用下面的例子:
stroke_drawable.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
<stroke
android:width="4dp" android:color="@android:color/black"/>
</shape>
并添加android:前台="@drawable/stroke_drawable"到布局XML文件中的ImageView，你会得到这个:
不过，我不确定如何添加阴影(这将适用于较旧的Android版本)。使用FloatingActionButton(从“com.google.android. button”材料:材料"依赖)，我未能使位图填充FAB本身。如果它能起作用，那么使用它会更好。
编辑:如果你想添加立面阴影(可从API 21)，你可以改变一点我写的:
在布局XML文件内部:
<androidx.appcompat.widget.AppCompatImageView android:padding="4dp"
android:id="@+id/avatarImageView" android:layout_width="100dp" android:layout_height="100dp" android:elevation="8dp"
android:layout_gravity="center" android:background="@drawable/stroke_drawable" tools:srcCompat="@drawable/avatar_1"/>
CircularShadowViewOutlineProvider.kt
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
class CircularShadowViewOutlineProvider : ViewOutlineProvider() {
override fun getOutline(view: View, outline: Outline) {
val size = Math.max(view.width, view.height)
outline.setRoundRect(0, 0, size, size, size / 2f)
}
}
在代码:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
avatarImageView.outlineProvider = CircularShadowViewOutlineProvider()
结果:
只需使用这些代码行，你就完成了:
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:clickable="true"
app:civ_border_width="3dp"
app:civ_border_color="#FFFFFFFF"
android:id="@+id/profile"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_below="@+id/header_cover_image"
android:layout_centerHorizontal="true"
android:layout_marginTop="-130dp"
android:elevation="5dp"
android:padding="20dp"
android:scaleType="centerCrop"
android:src="@drawable/profilemain" />
别忘了导入:
import de.hdodenhof.circleimageview.CircleImageView;
在构建中添加此库。gradle:
compile 'de.hdodenhof:circleimageview:2.1.0'
把这个答案贴出来供将来参考。你可以在com.google.android.material:material中使用ShapeableImageView。
<com.google.android.material.imageview.ShapeableImageView
android:id="@+id/img_launcher_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="5dp"
android:adjustViewBounds="true"
android:background="@android:color/transparent"
android:elevation="5dp"
android:maxWidth="50dp"
android:maxHeight="50dp"
android:scaleType="fitXY"
android:src="@mipmap/ic_launcher"
app:shapeAppearance="?attr/actionButtonStyle"
app:shapeAppearanceOverlay="@style/imageViewRounded"
app:strokeColor="@android:color/white" />
在你的styles.xml中添加imageviewraded样式
<style name="imageViewRounded">
<item name="cornerFamily">rounded</item>
<item name="cornerSize">51%</item>
</style>
如果没有添加，可以添加材料设计依赖项。
implementation 'com.google.android.material:material:1.4.0'
设计是这样的
您可以简单地使用CardView，而不需要任何外部库
<androidx.cardview.widget.CardView
android:id="@+id/roundCardView"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerHorizontal="true"
android:elevation="0dp"
app:cardCornerRadius="20dp">
<ImageView
android:layout_width="40dp"
android:layout_height="40dp"
android:src="@drawable/profile" />
</androidx.cardview.widget.CardView>
@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>
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