Blog on Haoxiqiang's Blog

Blog Migration: From Jekyll Chirpy to Hugo PaperMod

Fri, 26 Jun 2026 00:00:00 +0000

Documenting the migration from Jekyll + Chirpy to Hugo + PaperMod, including selection analysis and GitHub Pages best practices in 2026

Android & Linux Tips Collection #3

Wed, 05 Apr 2017 11:00:06 +0000

Three quick tips: handling the back button in DialogFragment, chmod permission reference, and the underscore problem in SSL hostnames.

DialogFragment Back Button Handling

DialogFragment has no direct override for the back button. Two approaches were commonly used.

Approach 1: Override in onCreateDialog

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    return new Dialog(getActivity(), getTheme()){
        @Override
        public void onBackPressed() {
            // Handle back press here
        }
    };
}

Approach 2: Via onKeyListener

@Override
public void onResume() {
    super.onResume();
    Dialog dialog = getDialog();
    if (dialog != null) {
        dialog.setOnKeyListener(this);
    }
}

@Override
public void onPause() {
    super.onPause();
    Dialog dialog = getDialog();
    if (dialog != null) {
        dialog.setOnKeyListener(null);
    }
}

Modern Approach: OnBackPressedDispatcher (AndroidX)

For newer versions, use AndroidX’s OnBackPressedDispatcher. Since Fragment 1.6.1, DialogFragment returns a ComponentDialog by default, which has its own OnBackPressedDispatcher:

Lorem Ipsum — Placeholder Text

Fri, 04 Dec 2015 12:04:00 +0000

A colleague asked me today what this text meant:

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aliquid veniam harum quas similique quis, quisquam tempore iste. Alias soluta dolorum ratione, dolorem quia corrupti, suscipit eveniet dolor dignissimos voluptas laborum debitis ea fugiat aliquam rem ullam minus a aliquid pariatur!

Tencent Interview

Mon, 08 Dec 2014 10:35:07 +0000

I came across stormzhang’s Tencent interview questions and decided to work through them, documenting my answers and thought process.

Topics covered:

Android fundamentals (processes, Activities, Handler)
Screen density and resource qualifiers
Thread synchronization in Java
System design (resumable downloads, network architecture)

Building a Blog with Jekyll

Sat, 21 Dec 2013 22:19:05 +0000

This is the first post of this blog. I referenced many Jekyll templates at the time, adapted a custom theme inspired by Pure, and hosted it on GitHub.

Source code: haoxiqiang-template

Jekyll Overview

Jekyll is a static site generator that converts plain text (Markdown, Liquid templates) into a complete static website without requiring a database. Combined with GitHub Pages, it provides free blog hosting.

Features

Code Highlighting

Jekyll has built-in syntax highlighting powered by Rouge:

def print_hi(name)
  puts "Hi, #{name}"
end
print_hi('Tom')
#=> prints 'Hi, Tom'

LaTeX Math Rendering

Set latex: true in the page front matter to enable MathJax rendering:

$$ \begin{aligned} \dot{x} &= \sigma(y-x) \ \dot{y} &= \rho x - y - xz \ \dot{z} &= -\beta z + xy \end{aligned} $$

$$ a^2 + b^2 = c^2 $$

When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$.

Excerpt Separator

Use `