捕捉RxJava全局异常

参考资料：https://github.com/ReactiveX/RxJava/wiki/Error-Handling

// 捕捉RxJava全局异常
RxJavaPlugins.setErrorHandler(new Consumer<Throwable>() {
    @Override
    public void accept(Throwable throwable) throws Exception {
        Toast.makeText(context, throwable.getMessage(), Toast.LENGTH_SHORT).show();
    }
});