工具-Bean检查

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bean检查是否含有非静态内部类

gson对非静态内部类（没有默认构造函数）会有问题

作者提了一种检查方法：运行时去匹配，运行时去拿到model对象的包路径下所有的class对象，然后做规则匹配

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public class PureInnerClassDetector {
    private static final String sPackageNeedDetect = "com.example.zhanghongyang.blog01.model";

    public static void startDetect(Application context) {

        try {
            final Set<String> classNames = new HashSet<>();
            ApplicationInfo applicationInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), 0);
            File sourceApk = new File(applicationInfo.sourceDir);
            DexFile dexfile = new DexFile(sourceApk);
            Enumeration<String> dexEntries = dexfile.entries();
            while (dexEntries.hasMoreElements()) {
                String className = dexEntries.nextElement();
                Log.d("zhy-blog", "detect " + className);
                if (className.startsWith(sPackageNeedDetect)) {
                    if (isPureInnerClass(className)) {
                        classNames.add(className);
                    }
                }
            }
            if (!classNames.isEmpty()) {
                for (String className : classNames) {
                    // crash ?
                    Log.e("zhy-blog", "编写非静态内部类被发现：" + className);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static boolean isPureInnerClass(String className) {
        if (!className.contains("$")) {
            return false;
        }
        try {
            Class<?> aClass = Class.forName(className);
            Field $this0 = aClass.getDeclaredField("this$0");
            if (!$this0.isSynthetic()) {
                return false;
            }
            // 其他匹配条件
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

}