在通过AndroidStudio构建我签名的应用时，我遇到了一个奇怪的问题。
该应用已成功生成，但当我想在智能手机上启动时，我收到以下错误：
FATAL EXCEPTION: main
Process: my.package, PID: 21935
java.lang.RuntimeException: Unable to start activity ComponentInfo{my.package/gui.Main}: android.view.InflateException: Binary XML file line #58: Binary XML file line #58: Error inflating class Button
at android.app.ActivityThread.perfor
mLaunchActivity(ActivityThread.java:2984)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: android.view.InflateException: Binary XML file line #58: Binary XML file line #58: Error inflating class Button
Caused by: android.view.InflateException: Binary XML file line #58: Error inflating class Button
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.ae.a()' on a null object reference
at android.support.v7.widget.ag.setBackgroundDrawable(Unknown Source)
at android.view.View.setBackground(View.java:19498)
at android.view.View.<init>(View.java:4932)
at android.widget.TextView.<init>(TextView.java:1041)
at android.widget.Button.<init>(Button.java:113)
at android.widget.Button.<init>(Button.java:106)
at android.support.v7.widget.ag.<init>(Unknown Source)
at android.support.v7.widget.ag.<init>(Unknown Source)
at android.support.v7.a.au.a(Unknown Source)
at android.support.v7.a.af.a(Unknown Source)
at android.support.v4.g.ad.onCreateView(Unknown Source)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:873)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.preference.PreferenceFragment.onCreateView(PreferenceFragment.java:179)
at android.app.Fragment.performCreateView(Fragment.java:2352)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:995)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1171)
at android.app.BackStackRecord.run(BackStackRecord.java:815)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1582)
at android.app.FragmentController.execPendingActions(FragmentController.java:372)
at android.app.Activity.performStart(Activity.java:6971)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2937)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
当我通过调试模式启动应用程序或构建调试APK文件时，它会正常启动。
我发现第58行的一个二进制XML文件中的按钮存在问题。 但在哪个文件？在Main类中，只有一个没有任何按钮的首选项文件......
为什么它在调试模式下工作？
有什么想法吗？ 谢谢！
答案 0 :(得分：0)
当我禁用proguard时，它可以工作！ ： - ）
但是proguard有什么问题？
这是我的Grandle文件：
buildTypes {
release {
minifyEnabled true
proguardFiles 'proguard.cfg'
}
}
proguard.cfg：
-ignorewarnings