如何重新抛出异常 [英] How to re-throw an exception

问题描述

在我的onCreate（）中，我设置了一个UncaughtException处理程序，如下所示：

In my onCreate() I set an UncaughtException handler as follows:

Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
    @Override
    public void uncaughtException(Thread thread, Throwable throwable) {
       Log.e(getMethodName(2), "uncaughtException", throwable);
       android.os.Process.killProcess(android.os.Process.myPid());
    }
});

它工作正常，但我想恢复系统显示强制关闭的默认行为给用户的对话框。

It works OK, but I would like to get back the system's default behavior of displaying the force-close dialog to the user.

如果我尝试用 KillProcess（）调用> throw throwable 编译器抱怨我需要用try / catch包围它。

If I try to replace the KillProcess() call with a throw throwable the compiler complains that I need to surround it with a try/catch.

如果我用try / catch包围它：

If I surround it with a try/catch:

Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
    @Override
    public void uncaughtException(Thread thread, Throwable throwable) {
        try {
            Log.e(getMethodName(2), "uncaughtException", throwable);
            throw throwable;
        }
        catch (Exception e) {           
        }
        finally {               
        }
    }
});

编译器仍然抱怨 throw throwable 需求用try / catch包围。

The compiler still complains that throw throwable needs to be surrounded with a try/catch.

如何重新抛出那个throwable？这样，除了信息性 Log.e（）之外，系统的行为与以前完全一样：因为我从未设置默认的UncaughtException处理程序。

How do I re-throw that throwable? Such that except for that informative Log.e() the system behaves exactly as before: As is I never set a default UncaughtException handler.

推荐答案

尝试：

public class CustomExceptionHandler implements UncaughtExceptionHandler {

    private UncaughtExceptionHandler defaultUEH;

    public CustomExceptionHandler() {
        this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
    }

    public void uncaughtException(Thread t, Throwable e) {
        Log.e("Tag", "uncaughtException", throwable);
        defaultUEH.uncaughtException(t, e);
    }
}

然后
Thread.setDefaultUncaughtExceptionHandler（new CustomExceptionHandler（））;

改编自这个答案。

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