机器人工作室:java.lang.NoClassDefFoundError的 [英] android studio: java.lang.NoClassDefFoundError
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问题描述
我想用csvreader,而我得到java.lang.NoClassDefFoundError的误差
在项目中,我把opencsv-3.2.jar libs文件夹中
而在摇篮,
编译文件(库/ opencsv-3.2.jar)
被添加在依赖
有关我的CSV文件,把它放在在src /主/租入资产价值/ data.csv的
在我的code:
AssetManager assetManager = context.getAssets();
尝试 {
InputStream的csvStream = assetManager.open(data.csv的);
InputStreamReader的csvStreamReader =新的InputStreamReader(csvStream);
CSVReader csvReader =新CSVReader(csvStreamReader);
的String [] nextLine;
Log.d(测试,读书CSV);
在下面的句子//错误
而((nextLine = csvReader.readNext())!= NULL){
// nextLine []是值从行的阵列
Log.d(测试,nextLine.toString()+等等......);
打破;
}
}赶上(FileNotFoundException异常E){
Log.d(测试,失败读取CSV);
e.printStackTrace();
}赶上(IOException异常E){
Log.d(测试,IO异常CSV);
e.printStackTrace();
}`
例外:
02-01 15:59:57.587 2271年至2271年/ com.example.brian.myapp E / AndroidRuntime:致命异常:主要
工艺:com.example.brian.myapp,PID:2271
java.lang.NoClassDefFoundError的:失败分辨率:Lorg /阿帕奇/公/ lang3 / StringUtils的;
在com.opencsv.CSVParser.isAllWhiteSpace(CSVParser.java:478)
在com.opencsv.CSVParser.parseLine(CSVParser.java:338)
在com.opencsv.CSVParser.parseLineMulti(CSVParser.java:270)
在com.opencsv.CSVReader.readNext(CSVReader.java:226)
在com.example.brian.myapplication.HandbookDatabase.readAndInsertData(HandbookDatabase.java:57)
在com.example.brian.myapplication.HandbookDatabase< INIT>(HandbookDatabase.java:40)
在com.example.brian.myapplication.MainActivity.onCreate(MainActivity.java:50)
在android.app.Activity.performCreate(Activity.java:5933)
在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
在android.app.ActivityThread.access $ 800(ActivityThread.java:144)
在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1278)
在android.os.Handler.dispatchMessage(Handler.java:102)
在android.os.Looper.loop(Looper.java:135)
在android.app.ActivityThread.main(ActivityThread.java:5221)
在java.lang.reflect.Method.invoke(本机方法)
在java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:899)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
抛出java.lang.ClassNotFoundException:产生的原因没有找到类org.apache.commons.lang3.StringUtils的路径:DexPathList [zip文件/data/app/com.example.brian.myapp-2/base apk文件],nativeLibraryDirectories = [/供应商/ lib中/系统/ lib目录]
在dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
在java.lang.ClassLoader.loadClass(ClassLoader.java:511)
在java.lang.ClassLoader.loadClass(ClassLoader.java:469)
在com.opencsv.CSVParser.isAllWhiteSpace(CSVParser.java:478)
在com.opencsv.CSVParser.parseLine(CSVParser.java:338)
在com.opencsv.CSVParser.parseLineMulti(CSVParser.java:270)
在com.opencsv.CSVReader.readNext(CSVReader.java:226)
在com.example.brian.myapplication.HandbookDatabase.readAndInsertData(HandbookDatabase.java:57)
在com.example.brian.myapplication.HandbookDatabase< INIT>(HandbookDatabase.java:40)
在com.example.brian.myapplication.MainActivity.onCreate(MainActivity.java:50)
在android.app.Activity.performCreate(Activity.java:5933)
在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
在android.app.ActivityThread.access $ 800(ActivityThread.java:144)
在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1278)
在android.os.Handler.dispatchMessage(Handler.java:102)
在android.os.Looper.loop(Looper.java:135)
在android.app.ActivityThread.main(ActivityThread.java:5221)
在java.lang.reflect.Method.invoke(本机方法)
在java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:899)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
燮pressed:抛出java.lang.ClassNotFoundException:org.apache.commons.lang3.StringUtils
在java.lang.Class.classForName(本机方法)
在java.lang.BootClassLoader.findClass(ClassLoader.java:781)
在java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
在java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 21更多
java.lang.NoClassDefFoundError的:产生的原因未找到类使用引导类加载器;没有堆栈可用
解决方案
您需要添加公地lang3
的依赖。
'org.apache.commons:公地lang3:3.0
包含丢失的类组织/阿帕奇/公/ lang3 / StringUtils的
I am trying to use the csvreader while I get the error of java.lang.NoClassDefFoundError
In the project, I put the opencsv-3.2.jar in the libs folder
and in the gradle,
compile files ('libs/opencsv-3.2.jar')
are added in the dependencies
For my csv file, it is put in the src/main/assests/data.csv
in my code:
AssetManager assetManager = context.getAssets();
try {
InputStream csvStream = assetManager.open("data.csv");
InputStreamReader csvStreamReader = new InputStreamReader(csvStream);
CSVReader csvReader = new CSVReader(csvStreamReader);
String [] nextLine;
Log.d("test","reading csv");
// error in following sentence
while ((nextLine = csvReader.readNext()) != null) {
// nextLine[] is an array of values from the line
Log.d("test",nextLine.toString() + "etc...");
break;
}
} catch (FileNotFoundException e) {
Log.d("test","fail read csv");
e.printStackTrace();
} catch (IOException e) {
Log.d("test","io exception csv");
e.printStackTrace();
}`
Exception:
02-01 15:59:57.587 2271-2271/com.example.brian.myapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.brian.myapp, PID: 2271
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/commons/lang3/StringUtils;
at com.opencsv.CSVParser.isAllWhiteSpace(CSVParser.java:478)
at com.opencsv.CSVParser.parseLine(CSVParser.java:338)
at com.opencsv.CSVParser.parseLineMulti(CSVParser.java:270)
at com.opencsv.CSVReader.readNext(CSVReader.java:226)
at com.example.brian.myapplication.HandbookDatabase.readAndInsertData(HandbookDatabase.java:57)
at com.example.brian.myapplication.HandbookDatabase.<init>(HandbookDatabase.java:40)
at com.example.brian.myapplication.MainActivity.onCreate(MainActivity.java:50)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.commons.lang3.StringUtils" on path: DexPathList[[zip file "/data/app/com.example.brian.myapp-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.opencsv.CSVParser.isAllWhiteSpace(CSVParser.java:478)
at com.opencsv.CSVParser.parseLine(CSVParser.java:338)
at com.opencsv.CSVParser.parseLineMulti(CSVParser.java:270)
at com.opencsv.CSVReader.readNext(CSVReader.java:226)
at com.example.brian.myapplication.HandbookDatabase.readAndInsertData(HandbookDatabase.java:57)
at com.example.brian.myapplication.HandbookDatabase.<init>(HandbookDatabase.java:40)
at com.example.brian.myapplication.MainActivity.onCreate(MainActivity.java:50)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Suppressed: java.lang.ClassNotFoundException: org.apache.commons.lang3.StringUtils
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 21 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
解决方案
You need to add commons-lang3
as dependency.
'org.apache.commons:commons-lang3:3.0'
which contains the missing class org/apache/commons/lang3/StringUtils
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