字体在Android Studio预览中更改，但在模拟器/设备中未更改 [英] Font gets changed in Android Studio preview but not in the Emulator/device
问题描述
我正在尝试更改textviews，复选框，按钮和android.support.design.widget.TextInputLayout的默认字体.为了清楚说明，我设置了"android:fontFamily> cursive<.
I'm trying to change the default font of textviews, checkbox, buttons and android.support.design.widget.TextInputLayout. For clear illustration, I set "android:fontFamily">cursive<.
它似乎在Android Studio预览中正确显示，但在模拟器中却不正确，如下所示.另请注意，密码(提示)似乎在这两种方式中均不起作用.非常感谢您的帮助，以强调发生这种情况的原因.
It seems to appear correctly in Android Studio preview but not in the Emulator, as shown below. Also note, that password (hint) does not seems to work in both. Would appreciate your help to highlight why this is happening.
styles.xml:
styles.xml:
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:textColor">#ed328b</item>
<item name="android:titleTextColor">#ed328b</item>
<item name="android:textSize">14sp</item>
<item name="android:fontFamily">cursive</item>
</style>
<style name="TextLabel" parent="Widget.Design.TextInputLayout">
<!-- Hint color and label color in FALSE state -->
<item name="android:textColorHint">#ed328b</item>
<item name="android:textSize">14sp</item>
<!-- Label color in TRUE state and bar color FALSE and TRUE State -->
<item name="colorAccent">#ed328b</item>
<item name="android:textColor">#ed328b</item>
<item name="colorControlNormal">#ed328b</item>
<item name="colorControlActivated">#ed328b</item>
<item name="android:textColorSecondary">#ed328b</item>
<item name="android:textColorPrimary">#ed328b</item>
<item name="android:fontFamily">cursive</item>
</style>
activity_main.xml:
activity_main.xml:
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/TextLabel"
android:layout_marginTop="@dimen/space_2">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:inputType="textEmailAddress"
android:hint="@string/signin_emailaddress"
android:id="@+id/txtEmail" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/TextLabel"
android:layout_marginTop="@dimen/space_2">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:inputType="textPassword"
android:hint="@string/signin_password"
android:id="@+id/txtPassword" />
</android.support.design.widget.TextInputLayout>
<CheckBox
android:id="@+id/rememberBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_gravity="start"
android:text="remember my email and password"
android:textAlignment="center"
android:textColor="#ed328b"
android:textSize="11dp" />
推荐答案
Android不支持通过XML将自定义字体直接应用于文本小部件的内置支持.
Android doesn't have built-in support for applying custom fonts directly to text widgets through XML.
您可以参考此文档以xml设置字体: https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml.html
You can refer this document to set fonts in xml: https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml.html
或者您需要在Java代码中设置字体以更改字体.
Or you need to set typeface in java code in order to change fonts.
或者您可以执行以下操作:
Or you can do something like this:
第一
您需要定义自己的样式.在您的/res/values文件夹中，打开/创建attrs.xml文件，并添加一个可声明样式的对象，如下所示:
You'll need to define your own stylable. In your /res/values folder, open/create the attrs.xml file and add a declare-styleable object like so:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="FontText">
<attr name="typefaceAsset" format="string"/>
</declare-styleable>
</resources>
第二
假设您想经常使用此小部件，则应为加载的Typeface对象设置一个简单的缓存，因为从内存中动态加载它们可能会花费一些时间.像这样:
Assuming you want to use this widget often, you should set up a simple cache for the loaded Typeface objects, since loading them from memory on the fly can take time. Something like:
public class FontManager {
private static FontManager instance;
private AssetManager mgr;
private Map<String, Typeface> fonts;
private FontManager(AssetManager _mgr) {
mgr = _mgr;
fonts = new HashMap<String, Typeface>();
}
public static void init(AssetManager mgr) {
instance = new FontManager(mgr);
}
public static FontManager getInstance() {
if (instance == null) {
// App.getContext() is just one way to get a Context here
// getContext() is just a method in an Application subclass
// that returns the application context
AssetManager assetManager = App.getContext().getAssets();
init(assetManager);
}
return instance;
}
public Typeface getFont(String asset) {
if (fonts.containsKey(asset))
return fonts.get(asset);
Typeface font = null;
try {
font = Typeface.createFromAsset(mgr, asset);
fonts.put(asset, font);
} catch (Exception e) {
}
if (font == null) {
try {
String fixedAsset = fixAssetFilename(asset);
font = Typeface.createFromAsset(mgr, fixedAsset);
fonts.put(asset, font);
fonts.put(fixedAsset, font);
} catch (Exception e) {
}
}
return font;
}
private String fixAssetFilename(String asset) {
// Empty font filename?
// Just return it. We can't help.
if (TextUtils.isEmpty(asset))
return asset;
// Make sure that the font ends in '.ttf' or '.ttc'
if ((!asset.endsWith(".ttf")) && (!asset.endsWith(".ttc")))
asset = String.format("%s.ttf", asset);
return asset;
}
}
此文件将允许您使用.ttc文件扩展名，但未经测试.
This one will allow you to use .ttc file extensions, but it's untested.
第三
创建一个继承TextView的新类.此特定示例考虑了已定义的XML字体(粗体，斜体等)，并将其应用于字体(假设您使用的是.ttc文件).
Create a new class that subclasses TextView. This particular example takes into account the defined XML typeface (bold, italic, etc.) and apply it to the font (assuming you're using a .ttc file).
/**
* TextView subclass which allows the user to define a truetype font file to use as the view's typeface.
*/
public class FontText extends TextView {
public FontText(Context context) {
this(context, null);
}
public FontText(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FontText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
if (isInEditMode())
return;
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.FontText);
if (ta != null) {
String fontAsset = ta.getString(R.styleable.FontText_typefaceAsset);
if (!TextUtils.isEmpty(fontAsset)) {
Typeface tf = FontManager.getInstance().getFont(fontAsset);
int style = Typeface.NORMAL;
float size = getTextSize();
if (getTypeface() != null)
style = getTypeface().getStyle();
if (tf != null)
setTypeface(tf, style);
else
Log.d("FontText", String.format("Could not create a font from asset: %s", fontAsset));
}
}
}
}
最后
用完全限定的类名替换XML中的TextView实例.就像使用Android名称空间一样声明您的自定义名称空间.请注意，"typefaceAsset"应指向/assets目录中包含的.ttf或.ttc文件.
Replace the instances of TextView in your XML with the fully qualified class name. Declare your custom namespace just like you would the Android namespace. Note that the "typefaceAsset" should point to a .ttf or .ttc file contained in your /assets directory.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.example.FontText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a custom font text"
custom:typefaceAsset="fonts/AvenirNext-Regular.ttf"/>
</RelativeLayout>
这篇关于字体在Android Studio预览中更改，但在模拟器/设备中未更改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！
