我正在使用 Android Studio，我希望能够从图库中拾取图像，调整它的大小并通过保持正确的宽高比使其适合圆角正方形(大约 300x300 像素)。 目前，我可以调整它的大小并将其显示为一个圆圈。
FixBitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
bitmap_to_save = scaleBitmapAndKeepRation(FixBitmap, 320, 320);
RoundedBitmapDrawable roundDrawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap_to_save);
roundDrawable.setCircular(true);
p_avatar.setImageDrawable(roundDrawable);
但是，我想知道是否可以使位图看起来像我附加的图像。此外，在不丢失原始宽高比的情况下调整图像大小对我来说很重要。
这不是一个完全正方形的圆角图形，所以我不确定在 Android 中是否可以做到这一点。
请记住，我会根据用户操作动态更改代码中的 ImageView 。所以这不是静态图片，如果用户上传新图片，我会用新内容替换原始内容。
5 月 20 日编辑 1
这是 ImageView “头像”的 XML 代码:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ll_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="loginpackage.social.com.ui.profile.ProfileActivity">
<include layout="@layout/custom_toolbar_shadow" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
android:paddingTop="@dimen/_20sdp">
<ImageView
android:id="@+id/avatar"
android:layout_width="137dp"
android:layout_height="150dp"
android:layout_gravity="center"
android:clickable="true"
android:paddingBottom="@dimen/_10sdp"
android:paddingTop="@dimen/_10sdp"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_20sdp"
android:orientation="vertical"
android:paddingLeft="@dimen/_16sdp"
android:paddingRight="@dimen/_16sdp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/profileActivity_name"
android:textSize="@dimen/_14sdp" />
<EditText
android:id="@+id/et_fullname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_5sdp"
android:background="@color/colorWhite"
android:hint="@string/signActivity_fullname"
android:imeOptions="actionDone"
android:inputType="textNoSuggestions"
android:maxLines="1"
android:padding="@dimen/_10sdp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_10sdp"
android:text="@string/profileActivity_email"
android:textSize="@dimen/_14sdp" />
<EditText
android:id="@+id/et_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_5sdp"
android:background="@drawable/editext_back_login"
android:hint="@string/mainActivity_email"
android:imeOptions="actionNext"
android:inputType="textEmailAddress|textNoSuggestions"
android:maxLines="1"
android:padding="@dimen/_10sdp" />
<Button
android:id="@+id/btn_update"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_20sdp"
android:background="@color/colorSignuoBtn"
android:text="@string/profileActivity_update"
android:textColor="@color/colorWhite"
android:textSize="@dimen/_12sdp"
android:visibility="invisible" />
<TextView
android:id="@+id/txt_logout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="@dimen/_10sdp"
android:layout_marginTop="@dimen/_20sdp"
android:background="@drawable/button_logout_profile"
android:foreground="?attr/selectableItemBackgroundBorderless"
android:gravity="center"
android:paddingBottom="@dimen/_12sdp"
android:paddingTop="@dimen/_12sdp"
android:text="@string/profileActivity_logout"
android:textSize="@dimen/_12sdp" />
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
编辑2
目前，我正在使用 Picasso 对图像进行圆角处理，它似乎效果很好。 问题是我想始终保持相同的图片尺寸 (350x350px) 和纵横比。这怎么可能？
Transformation transformation = new RoundedTransformationBuilder()
.borderColor(Color.GREEN)
.borderWidthDp(2)
.cornerRadiusDp(15)
.oval(false)
.build();
Picasso.get().load("http://www.server.com/uploads/avatars/"+Conts.USERINFO.getId()).transform(transformation).memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE).networkPolicy(NetworkPolicy.NO_CACHE) .into(p_avatar);
编辑 3:
<com.makeramen.roundedimageview.RoundedImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/avatar"
android:layout_width="160dp"
android:layout_height="160dp"
android:src="@drawable/adduserprofile"
android:scaleType="centerCrop"
app:riv_border_width="2dip"
app:riv_border_color="#333333"
app:riv_mutate_background="true"
app:riv_oval="false"
app:riv_corner_radius_bottom_left="20dp"
app:riv_corner_radius_top_right="20dp"
/>
为什么如果我为 riv_corner_radius_top_right 设置不同的值，应用程序会崩溃？
例如，如果我设置:
app:riv_corner_radius_bottom_left="20dp"
app:riv_corner_radius_top_right="10dp"
我收到这个错误:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: loginpackage.social.com, PID: 25495
java.lang.RuntimeException: Unable to start activity ComponentInfo{loginpackage.social.com/loginpackage.social.com.ui.profile.ProfileActivity}: android.view.InflateException: Binary XML file line #24: Error inflating class com.makeramen.roundedimageview.RoundedImageView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2689)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2754)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: android.view.InflateException: Binary XML file line #24: Error inflating class com.makeramen.roundedimageview.RoundedImageView
at android.view.LayoutInflater.createView(LayoutInflater.java:640)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at loginpackage.social.com.ui.profile.ProfileActivity.onCreate(ProfileActivity.java:93)
at android.app.Activity.performCreate(Activity.java:6288)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2642)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2754)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:614)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at loginpackage.social.com.ui.profile.ProfileActivity.onCreate(ProfileActivity.java:93)
at android.app.Activity.performCreate(Activity.java:6288)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2642)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2754)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: java.lang.IllegalArgumentException: Multiple nonzero corner radii not yet supported.
at com.makeramen.roundedimageview.RoundedDrawable.setCornerRadius(RoundedDrawable.java:507)
at com.makeramen.roundedimageview.RoundedImageView.updateAttrs(RoundedImageView.java:368)
at com.makeramen.roundedimageview.RoundedImageView.updateDrawableAttrs(RoundedImageView.java:318)
at com.makeramen.roundedimageview.RoundedImageView.<init>(RoundedImageView.java:163)
at com.makeramen.roundedimageview.RoundedImageView.<init>(RoundedImageView.java:86)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:614)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at loginpackage.social.com.ui.profile.ProfileActivity.onCreate(ProfileActivity.java:93)
at android.app.Activity.performCreate(Activity.java:6288)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2642)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2754)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
最佳答案
如果您在公司从事项目，则不应花时间管理这些类型的逻辑。
相反，您可以只使用已经做得很好的库。 参见 https://github.com/vinc3m1/RoundedImageView
你的 ImageView 会是这样的
<com.makeramen.roundedimageview.RoundedImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/imageView1"
android:src="@drawable/photo1"
android:scaleType="centerCrop"
app:riv_corner_radius="30dip"
app:riv_border_width="2dip"
app:riv_border_color="#333333"
app:riv_mutate_background="true"
app:riv_tile_mode="repeat"
app:riv_oval="true" />
和依赖
repositories {
mavenCentral()
}
dependencies {
compile 'com.makeramen:roundedimageview:2.3.0'
}
更新
你似乎是 android 的新手，如果你不了解 id 和 src，别担心!
Basically
idis an unique id that you have created and you refer to imageView1 if you do findViewById(R.id.imageView1) in your java code.
有关 id 的更多信息:Difference between "@id/" and "@+id/" in Android
srcis the source image file for that image, that is located in your drawables directory.
关于您的问题
您可以使用不同的 ImageView ScaleType符合您的要求。
我认为您使用适合 imageView 图像的 android:scaleType="centerCrop"。
我还在上面的答案中编辑了 scaleType。如果这不符合您的要求，您可以使用其中任何一个 scale type
更新2设置宽高，可以设置layout_width和layout_height属性。如下所示。
<com.makeramen.roundedimageview.RoundedImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/imageView1"
android:src="@drawable/photo1"
android:scaleType="centerCrop"
app:riv_corner_radius="30dip"
app:riv_border_width="2dip"
app:riv_border_color="#333333"
app:riv_mutate_background="true"
app:riv_tile_mode="repeat"
app:riv_oval="true"
android:layout_width="350dp"
android:layout_height="350dp"/>
参见 What is the difference between "px", "dip", "dp" and "sp"?有关 android 中 sp、dp、px 的更多详细信息。
关于android - 如何使位图适合圆角正方形？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50425606/