安卓修改大师Smali插桩实战

为应用添加英语与高棉语一键切换按钮的完整技术实现

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图1：Smali代码插桩技术是实现应用功能定制的核心手段

“用安卓修改大师汉化过十几个APP了，操作真的太方便了。以前用其他工具要手动敲命令，现在直接在表格里输入中文就行，效率提升了好几倍。而且内置的编码转换工具解决了汉化乱码的大问题。”—— 来自官网用户评论

图2：Android多语言资源查找优先级机制

“安卓修改大师的多语言支持功能太强大了！以前制作多语言版本需要在Android Studio中重新编译，现在直接用反编译后的资源文件创建新语言目录就行。我给公司的应用添加了5种东南亚语言支持，整个过程不到半天就搞定了。”—— 来自官网用户评论

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">កម្មវិធីរបស់ខ្ញុំ</string>
    <string name="settings">ការកំណត់</string>
    <string name="language">ភាសា</string>
    <string name="english">អង់គ្លេស</string>
    <string name="khmer">ខ្មែរ</string>
    <string name="save">រក្សាទុក</string>
    <string name="confirm">បញ្ជាក់</string>
</resources>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:padding="16dp">

    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/language"
        android:textSize="16sp" />

    <Button
        android:id="@+id/btn_switch_language"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/english"
        android:onClick="onLanguageSwitchClick"
        android:padding="8dp 16dp" />

</LinearLayout>

# 在设置Activity类中插入方法：onLanguageSwitchClick
# 此方法绑定到按钮的onClick属性

.method public onLanguageSwitchClick(Landroid/view/View;)V
    .locals 6
    .param p1, "view"  # Landroid/view/View;

    .prologue
    .line 1
    # 获取当前系统语言设置
    invoke-virtual {p0}, Lcom/example/app/SettingsActivity;->getResources()Landroid/content/res/Resources;
    move-result-object v0

    invoke-virtual {v0}, Landroid/content/res/Resources;->getConfiguration()Landroid/content/res/Configuration;
    move-result-object v1

    # 获取当前语言代码
    iget-object v2, v1, Landroid/content/res/Configuration;->locale:Ljava/util/Locale;

    invoke-virtual {v2}, Ljava/util/Locale;->getLanguage()Ljava/lang/String;
    move-result-object v3

    .line 2
    # 判断当前语言是否为高棉语
    const-string v4, "km"
    invoke-virtual {v3, v4}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z
    move-result v5

    if-eqz v5, :switch_to_english

    :switch_to_khmer
    # 切换到高棉语
    new-instance v2, Ljava/util/Locale;
    const-string v4, "km"
    invoke-direct {v2, v4}, Ljava/util/Locale;->(Ljava/lang/String;)V
    iput-object v2, v1, Landroid/content/res/Configuration;->locale:Ljava/util/Locale;

    # 更新资源
    invoke-virtual {v0, v1}, Landroid/content/res/Resources;->updateConfiguration(Landroid/content/res/Configuration;Landroid/util/DisplayMetrics;)V

    # 更新按钮文本（可选：显示当前语言）
    const v4, 0x7f080012  # R.id.btn_switch_language 的资源ID
    invoke-virtual {p0, v4}, Lcom/example/app/SettingsActivity;->findViewById(I)Landroid/view/View;
    move-result-object v4
    check-cast v4, Landroid/widget/Button;

    # 设置按钮文本为高棉语
    const-string v5, "ខ្មែរ"
    invoke-virtual {v4, v5}, Landroid/widget/Button;->setText(Ljava/lang/CharSequence;)V

    goto :end_switch

    :switch_to_english
    # 切换到英语
    new-instance v2, Ljava/util/Locale;
    const-string v4, "en"
    invoke-direct {v2, v4}, Ljava/util/Locale;->(Ljava/lang/String;)V
    iput-object v2, v1, Landroid/content/res/Configuration;->locale:Ljava/util/Locale;

    # 更新资源
    invoke-virtual {v0, v1}, Landroid/content/res/Resources;->updateConfiguration(Landroid/content/res/Configuration;Landroid/util/DisplayMetrics;)V

    # 更新按钮文本
    const v4, 0x7f080012
    invoke-virtual {p0, v4}, Lcom/example/app/SettingsActivity;->findViewById(I)Landroid/view/View;
    move-result-object v4
    check-cast v4, Landroid/widget/Button;

    const-string v5, "English"
    invoke-virtual {v4, v5}, Landroid/widget/Button;->setText(Ljava/lang/CharSequence;)V

    :end_switch
    .line 3
    # 重启Activity以应用新语言设置
    invoke-virtual {p0}, Lcom/example/app/SettingsActivity;->recreate()V

    .line 4
    return-void
.end method

图3：安卓修改大师Smali编辑器界面，支持语法高亮和代码提示

# 保存语言设置到SharedPreferences的Smali代码

.method private saveLanguagePreference(Ljava/lang/String;)V
    .locals 4
    .param p1, "languageCode"  # 语言代码，如"en"或"km"

    .prologue
    # 获取SharedPreferences
    const-string v0, "language_prefs"
    const/4 v1, 0x0
    invoke-virtual {p0, v0, v1}, Landroid/content/Context;->getSharedPreferences(Ljava/lang/String;I)Landroid/content/SharedPreferences;
    move-result-object v0

    # 获取Editor
    invoke-interface {v0}, Landroid/content/SharedPreferences;->edit()Landroid/content/SharedPreferences$Editor;
    move-result-object v1

    # 写入语言设置
    const-string v2, "selected_language"
    invoke-interface {v1, v2, p1}, Landroid/content/SharedPreferences$Editor;->putString(Ljava/lang/String;Ljava/lang/String;)Landroid/content/SharedPreferences$Editor;

    # 提交
    invoke-interface {v1}, Landroid/content/SharedPreferences$Editor;->apply()V

    .line
    return-void
.end method


# 在onCreate中读取语言设置并应用

.method protected onCreate(Landroid/os/Bundle;)V
    .locals 6
    .param p1, "savedInstanceState"

    .prologue
    # 原有onCreate代码保持不变
    # 在原有代码末尾添加以下语言恢复逻辑

    # 获取SharedPreferences
    const-string v0, "language_prefs"
    const/4 v1, 0x0
    invoke-virtual {p0, v0, v1}, Landroid/content/Context;->getSharedPreferences(Ljava/lang/String;I)Landroid/content/SharedPreferences;
    move-result-object v0

    # 读取保存的语言代码，默认为空字符串
    const-string v1, "selected_language"
    const-string v2, ""
    invoke-interface {v0, v1, v2}, Landroid/content/SharedPreferences;->getString(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
    move-result-object v3

    # 如果保存的语言不为空，则应用该语言设置
    invoke-static {v3}, Landroid/text/TextUtils;->isEmpty(Ljava/lang/CharSequence;)Z
    move-result v4
    if-eqz v4, :skip_language_restore

    # 创建新的Locale
    new-instance v4, Ljava/util/Locale;
    invoke-direct {v4, v3}, Ljava/util/Locale;->(Ljava/lang/String;)V

    # 更新Configuration
    invoke-virtual {p0}, Lcom/example/app/SettingsActivity;->getResources()Landroid/content/res/Resources;
    move-result-object v5
    invoke-virtual {v5}, Landroid/content/res/Resources;->getConfiguration()Landroid/content/res/Configuration;
    move-result-object v5

    iput-object v4, v5, Landroid/content/res/Configuration;->locale:Ljava/util/Locale;

    invoke-virtual {p0}, Lcom/example/app/SettingsActivity;->getResources()Landroid/content/res/Resources;
    move-result-object v4
    invoke-virtual {v4, v5}, Landroid/content/res/Resources;->updateConfiguration(Landroid/content/res/Configuration;Landroid/util/DisplayMetrics;)V

    :skip_language_restore
    # 继续执行原有onCreate逻辑
    # ...

    return-void
.end method

“之前用命令行改Smali经常寄存器报错，分不清locals和registers。安卓修改大师可视化编辑，改完自动校验寄存器数量，跟着多类型变量案例一次跑通Toast弹窗，效率比命令行高很多。”—— 来自官网用户评论

图4：通过动态调试定位Smali代码中的问题

图5：掌握Smali插桩技术，开启应用定制新世界

安卓修改大师 —— 让每一个手机用户，都能成为自己应用的主人

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