我已经实现了自定义TextView,然后我需要更改其文本大小以供将来使用.在那一步,我决定使用style.xml和attr.xml进行textSize自定义
但是,当我的自定义布局膨胀时,我收到运行时错误.与我为了自定义而更改的部件相关的错误.
这是我实现的代码片段.
attr.xml
<declare-styleable name="FieldLayout">
<attr name="right_detail_text_size" format="dimension"/>
</declare-styleable>
styles.xml
<style name="TextViewRightDetail">
<item name="android:textSize">?attr/right_detail_text_size</item>
</style>
layout_field_detailed.xml
<com.my.view.TextViewFont
android:id="@+id/layout_fielddetailed_textview_rightdetail"
style="@style/TextViewRightDetail" />
layout_implementation.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:iattr="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.my.view.FieldLayoutDetailed
android:id="@+id/fieldlayoutdetailed_example"
android:layout_width="match_parent"
android:layout_height="wrap_content"
iattr:right_detail_text_size="16sp"/>
</LinearLayout>
FieldLayoutDetailed.java
public FieldLayoutDetailed(Context context,AttributeSet attrs) {
super(context,attrs);
TypedArray array = context.obtainStyledAttributes(attrs,R.styleable.FieldLayout,0);
LayoutInflater.from(context).inflate(R.layout.layout_field_deailed,this,true);
我在运行时遇到的错误
... Caused by: java.lang.RuntimeException: Failed to resolve attribute at index 12 at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:569) at android.widget.TextView.<init>(TextView.java:1003) at android.widget.TextView.<init>(TextView.java:632) at android.widget.TextView.<init>(TextView.java:628) at com.my.view.TextViewFont.<init>(TextViewFont.java:29) at java.lang.reflect.Constructor.newInstance(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android.view.LayoutInflater.createView(LayoutInflater.java:607) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at com.my.view.FieldLayoutDetailed.<init>(FieldLayoutDetailed.java:50) at java.lang.reflect.Constructor.newInstance(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android.view.LayoutInflater.createView(LayoutInflater.java:607) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at android.view.LayoutInflater.inflate(LayoutInflater.java:365) at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378) at android.app.Activity.setContentView(Activity.java:2145) at com.my.ActivityWithMenu.setContentView(ActivityWithMenu.java:77) at com.my.FastCreditApplyMain.onCreate(FastCreditApplyMain.java:37) at android.app.Activity.performCreate(Activity.java:5990) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) at android.app.ActivityThread.access$800(ActivityThread.java:151) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) 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:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
现在我通过动态更改文本大小来解决问题,但我很好奇问题的原因.
谢谢.
解决方法
这是你的问题：
Caused by: java.lang.RuntimeException: Failed to resolve attribute at index 12 at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:569) at com.my.view.TextViewFont.<init>(TextViewFont.java:29)
可能的解决方案：将其放入TextViewFont.java的构造函数中
TypedArray a = context.obtainStyledAttributes(
attrs,0);
try {
final int fontSize = a.getDimensionPixelSize(R.styleable.FieldLayout_right_detail_text_size,0);
this.setTextSize(TypedValue.COMPLEX_UNIT_PX,fontSize);
}
finally {
a.recycle();
}
要么
TypedArray a = context.obtainStyledAttributes(
attrs,0);
try {
final int fontSize = a.getDimension(R.styleable.FieldLayout_right_detail_text_size,0);
this.setTextSize(fontSize);
}
finally {
a.recycle();
}
