Android 类代码防止反编译的办法

// 将此函数添加到要防止被反编译的类中即可！
// 注意：1.for 循环不可用 do{}while(false) 的形式来代替，否则无效！
// 　　　2.a[0 - i] = 0; 数组下标必须为数值计算(0 - i)的形式，否则无效！
private static void // static 最好保留以防被优化掉此函数
AntiDecompile()
{
    char a[] = { 0 };
    for( int i = 0;
             i < 1;
             i++ )
    {
         a[0 - i] = 0;
    }
}

在反编译工具下会报如下错误：
$ ./dex2jar.sh classes.dex
12:18:14.360 ERROR p.a.d.reader.DexFileReader - Fail on class
java.lang.RuntimeException: Error in method:[Lcom/example/antidecompile/MainActivity;.AntiDecompile()V]
at pxb.android.dex2jar.reader.DexFileReader.visitMethod(DexFileReader.java:479) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.reader.DexFileReader.acceptClass(DexFileReader.java:300) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.reader.DexFileReader.accept(DexFileReader.java:175) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.v3.Main.doFile(Main.java:66) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.v3.Main.main(Main.java:47) [dex2jar-0.0.7-SNAPSHOT.jar:na]
Caused by: java.lang.RuntimeException: Not support Opcode:[0x00d9]=RSUB_INT_LIT8 yet!
at pxb.android.dex2jar.v3.V3CodeAdapter.visitInInsn(V3CodeAdapter.java:816) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.reader.DexOpcodeAdapter.visit(DexOpcodeAdapter.java:317) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.reader.DexCodeReader.accept(DexCodeReader.java:277) [dex2jar-0.0.7-SNAPSHOT.jar:na]
at pxb.android.dex2jar.reader.DexFileReader.visitMethod(DexFileReader.java:477) [dex2jar-0.0.7-SNAPSHOT.jar:na]
... 4 common frames omitted
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Error in method:[Lcom/example/antidecompile/MainActivity;.AntiDecompile()V]
at pxb.android.dex2jar.reader.DexFileReader.accept(DexFileReader.java:179)
at pxb.android.dex2jar.v3.Main.doFile(Main.java:66)
at pxb.android.dex2jar.v3.Main.main(Main.java:47)
Caused by: java.lang.RuntimeException: Error in method:[Lcom/example/antidecompile/MainActivity;.AntiDecompile()V]
at pxb.android.dex2jar.reader.DexFileReader.visitMethod(DexFileReader.java:479)
at pxb.android.dex2jar.reader.DexFileReader.acceptClass(DexFileReader.java:300)
at pxb.android.dex2jar.reader.DexFileReader.accept(DexFileReader.java:175)
... 2 more
Caused by: java.lang.RuntimeException: Not support Opcode:[0x00d9]=RSUB_INT_LIT8 yet!
at pxb.android.dex2jar.v3.V3CodeAdapter.visitInInsn(V3CodeAdapter.java:816)
at pxb.android.dex2jar.reader.DexOpcodeAdapter.visit(DexOpcodeAdapter.java:317)
at pxb.android.dex2jar.reader.DexCodeReader.accept(DexCodeReader.java:277)
at pxb.android.dex2jar.reader.DexFileReader.visitMethod(DexFileReader.java:477)
... 4 more