我在KitKat版本上有这个问题,其余的从16个API级别到25个工作正常
实例化布局的类具有布局方法,例如
select school_name, course,
grade,
sum(grade)
(select
schools.name as school_name,
courses.name as course,
CASE
WHEN ((studentgrades.averageScore / 50 * 100) > 79)
THEN 'A'
WHEN ((studentgrades.averageScore / 50 * 100) < 80)
AND ((studentgrades.averageScore / 50 * 100) >64)
THEN 'B'
WHEN ((studentgrades.averageScore / 50 * 100) < 80)
AND ((studentgrades.averageScore / 50 * 100) >64)
THEN 'C'
WHEN ((studentgrades.averageScore / 50 * 100) < 50)
THEN 'D'
END as grade,
count(*)
from
students,
studentgrades,
schools,
courses
where
studentgrades.studentid = students.studentid
and studentgrades.schoolid = students.schoolid
and studentgrades.schoolid = schools.school_number
and courses.id = studentgrades.coursesid
and studentgrades.averageScore is not null
and schools.name = 'St. Joe School'
group by schools.name, courses.name,standardsgrades.averageScore)
group by grade order by grade;
我知道我可以将此更改为听众,数据绑定或使用像Butterknife这样的库,但我有兴趣知道为什么只是崩溃4.X版本?
<android.support.v7.widget.AppCompatButton
android:onClick="onClick"
...
public void onClick(View v) {
// do something
}
答案 0 :(得分:3)
我找到了一些关于这个问题的解释。它是作为一个错误提交的。这是bug报告的链接。 https://issuetracker.google.com/issues/37108938
在一个要点中,他们说问题已在API 24中修复,onClick与支持库不兼容。我在关于kitkat问题的帖子中添加了评论。
答案 1 :(得分:0)
有一种解决方法。它在API 19上测试并且运行良好
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:onClick="onClick" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/appCompatButtonStyle" // Note this
android:text="Button"
android:onClick="onClick" />
</LinearLayout>
在你的styles.xml中
<style name="appCompatButtonStyle" parent="Widget.AppCompat.Button.Colored">
<item name="backgroundTint">@color/colorWhite</item>
<item name="android:textColor">@color/colorMaterialGrey</item>
</style>