小编har*_*aki的帖子

我正在为android 5及更高版本编写一个应用程序，并且在一个屏幕上我需要显示一个带有几个单选按钮的单选组，但是按钮drawable（xml drawable）未在android 5上显示，但在android上按预期工作6。

这是我的活动布局：

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@drawable/radio_button_selector"
        android:text="1" />

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@drawable/radio_button_selector"
        android:text="1" />

</RadioGroup>

radio_button_selector.xml：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true" android:drawable="@drawable/radio_button_selected"  />
    <item android:drawable="@drawable/radio_button_unselected" />

</selector>

和radio_button_selected.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">

    <size
        android:width="15dp"
        android:height="15dp" />

    <solid android:color="#643023" />

</shape>

我的活动：

public class Test extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
    }
}

我在仿真器API级别21和LG Leon 4G LTE（android 5，hdpi）上重现了该问题。可绘制对象在Nexus 5（Android 6.0.1，xxhdpi）和带有Android 6的模拟器上正确显示。

我所有的资源当前都位于默认目录中。

我正在试图模糊我的android应用程序,我使用android.support.v7.appcompat和android.support.v7.GridLayout,但应用程序崩溃时出现以下异常:

android.view.InflateException: Binary XML file line #2: Error inflating class    android.support.v7.widget.GridLayout
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:698)
at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at com.droid.fragments.c.al.onCreateView(Unknown Source)
at android.support.v4.app.Fragment.performCreateView(Unknown Source)
at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
at android.support.v4.app.BackStackRecord.run(Unknown Source)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(Unknown Source)
at android.support.v4.app.FragmentManagerImpl$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: android.support.v7.widget.GridLayout
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.view.LayoutInflater.createView(LayoutInflater.java:552)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)

我的proguard-project.txt:

-dontusemixedcaseclassnames  
-dontskipnonpubliclibraryclasses  
-verbose  
-dontoptimize  
-dontpreverify  
-keepclasseswithmembernames class …