bug_ _ 常见的bug1

 =====  3   java.lang.reflect.InvocationTargetException 异常解决方法

在做djunit测试的时候，发生下面异常：

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:600)
    at jp.co.dgic.testing.common.DJUnitClassLoader.getModifiedClass(DJUnitClassLoader.java:106)
    at jp.co.dgic.testing.common.DJUnitClassLoader.findClass(DJUnitClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:653)
    at jp.co.dgic.testing.common.DJUnitClassLoader.loadClass(DJUnitClassLoader.java:45)
    at jp.co.dgic.testing.common.DJUnitEclipseClassLoader.loadClass(DJUnitEclipseClassLoader.java:59)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:619)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:425)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:600)
    at jp.co.dgic.eclipse.jdt.internal.junit.runner.DJUnitRunner.main(DJUnitRunner.java:49)
Caused by: java.io.IOException: Class not found
    at org.objectweb.asm.ClassReader.a(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at jp.co.dgic.testing.common.AsmClassModifier.getModifiedClass(AsmClassModifier.java:49)
    ... 21 more
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:600)
    at jp.co.dgic.testing.common.DJUnitClassLoader.getModifiedClass(DJUnitClassLoader.java:106)
    at jp.co.dgic.testing.common.DJUnitClassLoader.findClass(DJUnitClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:653)
    at jp.co.dgic.testing.common.DJUnitClassLoader.loadClass(DJUnitClassLoader.java:45)
    at jp.co.dgic.testing.common.DJUnitEclipseClassLoader.loadClass(DJUnitEclipseClassLoader.java:59)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:619)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:425)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:600)
    at jp.co.dgic.eclipse.jdt.internal.junit.runner.DJUnitRunner.main(DJUnitRunner.java:49)
Caused by: java.io.IOException: Class not found
    at org.objectweb.asm.ClassReader.a(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at jp.co.dgic.testing.common.AsmClassModifier.getModifiedClass(AsmClassModifier.java:49)
    ... 21 more

发生原因：找到class相应路径下，对应的class文件没生成，有可能是某些class有错，导致没有完成编译，在clean后，经常发生。

解决方法：properties属性里的 java   compiler-->　building　-->　ビルド･パスの問題　-->　

                  abort   build   when   build   path     errors   occur / ビルド・パス・エラーの発生時にビルドを中断　 前面的勾去掉

======== 2   java.lang.outofmemoryerror exception?

10-30 22:53:38.246: E/AndroidRuntime(19137): FATAL EXCEPTION: Thread-1210
10-30 22:53:38.246: E/AndroidRuntime(19137): java.lang.OutOfMemoryError
10-30 22:53:38.246: E/AndroidRuntime(19137):    at com.android.volley.toolbox.DiskBasedCache.streamToBytes(DiskBasedCache.java:316)
10-30 22:53:38.246: E/AndroidRuntime(19137):    at com.android.volley.toolbox.DiskBasedCache.readString(DiskBasedCache.java:526)
10-30 22:53:38.246: E/AndroidRuntime(19137):    at com.android.volley.toolbox.DiskBasedCache.readStringStringMap(DiskBasedCache.java:549)
10-30 22:53:38.246: E/AndroidRuntime(19137):    at com.android.volley.toolbox.DiskBasedCache$CacheHeader.readHeader(DiskBasedCache.java:392)
10-30 22:53:38.246: E/AndroidRuntime(19137):    at com.android.volley.toolbox.DiskBasedCache.initialize(DiskBasedCache.java:155)
10-30 22:53:38.246: E/AndroidRuntime(19137):    at    com.android.volley.CacheDispatcher.run(CacheDispatcher.java:85)

This thing can be an easy fix for this

just add this line in your application tag in manifest file

android:largeHeap="true"

like this

<application
    android:largeHeap="true"
    android:allowBackup="true"

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