报错Error inflating class

错误列表

E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.example.myapplication, PID: 3145java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.OperateIndex}: android.view.InflateException: Binary XML file line #119: Binary XML file line #119: Error inflating class <unknown>at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)at android.app.ActivityThread.-wrap12(ActivityThread.java)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)at android.os.Handler.dispatchMessage(Handler.java:102)at android.os.Looper.loop(Looper.java:154)at android.app.ActivityThread.main(ActivityThread.java:6119)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)Caused by: android.view.InflateException: Binary XML file line #119: Binary XML file line #119: Error inflating class <unknown>Caused by: android.view.InflateException: Binary XML file line #119: Error inflating class <unknown>Caused by: java.lang.reflect.InvocationTargetExceptionat java.lang.reflect.Constructor.newInstance0(Native Method)at java.lang.reflect.Constructor.newInstance(Constructor.java:430)at android.view.LayoutInflater.createView(LayoutInflater.java:645)at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)at android.view.LayoutInflater.onCreateView(LayoutInflater.java:717)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:785)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)at android.view.LayoutInflater.inflate(LayoutInflater.java:518)at android.view.LayoutInflater.inflate(LayoutInflater.java:426)at android.view.LayoutInflater.inflate(LayoutInflater.java:377)at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:696)at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)at com.example.myapplication.OperateIndex.onCreate(OperateIndex.java:21)at android.app.Activity.performCreate(Activity.java:6679)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)at android.app.ActivityThread.-wrap12(ActivityThread.java)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)at android.os.Handler.dispatchMessage(Handler.java:102)at android.os.Looper.loop(Looper.java:154)at android.app.ActivityThread.main(ActivityThread.java:6119)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)Caused by: android.content.res.Resources$NotFoundException: Drawable com.example.myapplication:drawable/buy_rice_box with resource ID #0x7f07006fCaused by: android.content.res.Resources$NotFoundException: File res/drawable/buy_rice_box.xml from drawable resource ID #0x7f07006fat android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:725)at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:571)at android.content.res.Resources.loadDrawable(Resources.java:858)at android.content.res.TypedArray.getDrawable(TypedArray.java:928)at android.view.View.<init>(View.java:4202)at android.view.ViewGroup.<init>(ViewGroup.java:579)
E/AndroidRuntime:     at android.widget.LinearLayout.<init>(LinearLayout.java:211)at android.widget.LinearLayout.<init>(LinearLayout.java:207)at android.widget.LinearLayout.<init>(LinearLayout.java:203)at java.lang.reflect.Constructor.newInstance0(Native Method)at java.lang.reflect.Constructor.newInstance(Constructor.java:430)at android.view.LayoutInflater.createView(LayoutInflater.java:645)at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)at android.view.LayoutInflater.onCreateView(LayoutInflater.java:717)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:785)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)at android.view.LayoutInflater.inflate(LayoutInflater.java:518)at android.view.LayoutInflater.inflate(LayoutInflater.java:426)at android.view.LayoutInflater.inflate(LayoutInflater.java:377)at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:696)at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)at com.example.myapplication.OperateIndex.onCreate(OperateIndex.java:21)at android.app.Activity.performCreate(Activity.java:6679)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)at android.app.ActivityThread.-wrap12(ActivityThread.java)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)at android.os.Handler.dispatchMessage(Handler.java:102)at android.os.Looper.loop(Looper.java:154)at android.app.ActivityThread.main(ActivityThread.java:6119)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #8<gradient> tag requires 'angle' attribute to be a multiple of 45at android.graphics.drawable.GradientDrawable.updateGradientDrawableGradient(GradientDrawable.java:1572)at android.graphics.drawable.GradientDrawable.inflateChildElements(GradientDrawable.java:1394)at android.graphics.drawable.GradientDrawable.inflate(GradientDrawable.java:1215)at android.graphics.drawable.DrawableInflater.inflateFromXml(DrawableInflater.java:130)at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1227)at android.graphics.drawable.Drawable.createFromXml(Drawable.java:1200)at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:715)... 37 more

思路

Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #8 tag requires ‘angle’ attribute to be a multiple of 45
排查文件
根据这行报错信息提示，发现在我自定义编辑的XMl文件中gradient的属性angle的值设置错误

小知识

渐变角度，仅用于线性渐变。必须是[0-315]范围内45的倍数。

angle: 0 从左到右

angle 90 从下往上

angle 180 从右往左

angle 270 从上往下

总结

由于初学对安卓的一些属性不太了解，不规范的编写造成错误。可以通过观察错误信息找到可能认识的文件，再排查错误。

界面的错误主要表现为正常运行，但是点击事件就闪退模拟器桌面。

我刚开始怀疑版本的问题，但是核对了一下信息也没发现有什么不对的地方，其实就是报错信息过多，不耐烦看，但是还是屈服了，仔细排查出来的。

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【安卓开发/报错Error inflating class ＜unknown＞】

【安卓开发/报错Error inflating class 】

报错Error inflating class

错误列表

思路

小知识

总结

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