SVG在设备中不可见但在android xml中可见 [英] Svg not visible in device but visible in android xml
问题描述
我已将SVG用于这些图标，这些图标在xml中可见，但在device中不可见.以下是我的代码:
I have used SVG's for these icons, the icons are visible in xml but not visible in device . following is my code :
` <LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="10"
>
<ImageView
android:layout_width="0dp"
android:layout_height="25dp"
android:layout_weight="1.5"
app:srcCompat="@drawable/email_id_icon"
/>
<EditText
android:layout_width="0dp"
android:id="@+id/et_email"
android:layout_height="wrap_content"
android:layout_weight="8"
android:textColor="#fff"
android:inputType="textEmailAddress"
android:background="@android:color/transparent"
android:hint="Email Id"
android:textColorHint="#fff"
android:imeOptions="actionNext"
/>
</LinearLayout>`
我在SO上也遇到了类似的问题，其中大多数建议使用 android:src 而不是 app:srcCompat ，但是由于SVG，我不得不使用srcCompat.所以我该怎么做?
I have gone through similar questions on SO, most of them suggested to use
android: src instead of app:srcCompat , but I have to use srcCompat only because of SVGs. So what should I do?
编辑-我在另一项活动的布局中做了同样的事情.这是工作代码:
Edit - I have done the same thing in another activity's layout . here is the working code :
<LinearLayout
android:id="@+id/login_form_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/textView2"
android:gravity="center_horizontal"
android:orientation="vertical"
android:padding="20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="10">
<ImageView
android:id="@+id/username_iv"
android:layout_width="0dp"
android:layout_height="25dp"
android:layout_weight="2"
app:srcCompat="@drawable/email_id_icon" />
<EditText
android:layout_width="0dp"
android:id="@+id/username_et"
android:layout_height="wrap_content"
android:layout_weight="8"
android:textColor="#fff"
android:inputType="textEmailAddress"
android:background="@android:color/transparent"
android:hint="Email Id"
android:textColorHint="#fff"
android:imeOptions="actionNext"
/>
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginBottom="10dp"
android:background="#fff" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="10">
<ImageView
android:id="@+id/password_iv"
android:layout_width="0dp"
android:layout_height="25dp"
android:layout_weight="2"
app:srcCompat="@drawable/password_icon" />
<EditText
android:id="@+id/password_et"
android:layout_height="wrap_content"
android:layout_weight="8"
android:layout_width="0dp"
android:background="@android:color/transparent"
android:textColor="#fff"
android:hint="Password"
android:inputType="textPassword"
android:fontFamily="roboto"
android:textColorHint="#fff"
/>
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginBottom="20dp"
android:background="#fff" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btn_login"
android:layout_marginBottom="20dp"
android:background="@drawable/login_button_style"
android:text="Login"
android:textSize="@dimen/headingText"
android:textAllCaps="false"
android:textColor="#fff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_forgetpassword"
android:layout_marginBottom="10dp"
android:text="Forget your password ?"
android:textColor="#fff"
android:textSize="@dimen/headingText" />
</LinearLayout>
我不想使用4种分辨率的图标，所以我制作了一个.png图像，然后使用Android Studio的Vector资源将其转换为.svg.
I did not want to have icons in 4 resolutions so I made a single .png image and converted into .svg using Android Studio's Vector asset .
推荐答案
请确保您使用的是 AppCompatActivity ，而不是 Activity .如果您使用的是 Activity ，请输入您的活动/片段:
Make sure you are using AppCompatActivity and not Activity. If you are using Activity, then write in your activity / fragment:
imageView.setImageResource(R.drawable.ic_svg_image);
还添加 build.gradle :
android {
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
}
对于Android的4.x版本，您还可以添加对 TextView 的内部可绘制对象的支持.对于 ImageView s也是这样.
And for 4.x versions of Android you can also add a support for TextViews' inner drawables. This is also actual for ImageViews.
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
// This flag should be set to true to enable VectorDrawable support for API < 21.
AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
}
}
然后在AndroidManifest中添加此文件:
Then in AndroidManifest add this file:
<application
android:name=".MyApplication"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
...
</application>
有时它会在某些旧设备上崩溃.然后将您的可绘制对象包裹在里面:
Sometimes it crushes on some old devices. Then wrap your drawable inside:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/ic_svg_image/>
</selector>
并设置它而不是SVG:
and set it instead of SVG:
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/drawable"
/>
这篇关于SVG在设备中不可见但在android xml中可见的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
