Android11 系统修改 AOSP输入法的默认输入键盘布局

系统自带的输入法源码在packages\inputmethods\目录，像谷歌输入法和谷歌拼音输入法的源码都是在这里！
系统的默认输入法,修改掉其系统的语言,输入法键盘布局也会改变！
因为系统中的Android键盘（AOSP）有个语言设置选项，里面默认的是“使用系统语言”，
现在客户要求关闭默认“使用系统语言”，默认语言是英语，但是键盘要其它语言的

默认输入键盘布局由Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE属性报错，保存的值是一个哈希码-921088104，对应其默认输入语言 。

在设置输入法的时候，传入输入法默认输入语言的哈希值，达到修改输入键盘布局的目的！
即在设置Settings.Secure.ENABLED_INPUT_METHODS属性值的时候，后面添加默认语言。

1.先添加输入法包名和服务名后面加输入语言的哈希值

public static final String ENABLED_INPUT_METHODS = "enabled_input_methods";

adb shell settings get secure enabled_input_methods 
com.android.inputmethod.latin/.LatinIME;843948332

adb pull data/data/com.android.providers.settings/databases/settings.db

打开Secure表，查看default_input_method，enabled_input_methods和selected_input_method_subtype三个字段内容，：

default_input_method       com.android.inputmethod.latin/.LatinIME

enabled_input_methods    com.android.inputmethod.latin/.LatinIME;816242702;-921088104

selected_input_method_subtype    816242702


frameworks\base\packages\SettingsProvider\res\values\defaults.xml

<string name="config_enable_input_method" translatable="false">com.android.inputmethod.latin/.LatinIME;-921088104</string>
<string name="def_input_method_franch_keyboard" translatable="false">com.android.inputmethod.latin/.LatinIME;843948332</string> 法语 
<string name="config_default_input_method" translatable="false">com.android.inputmethod.latin/.LatinIME</string>

	
    // -921088104对应的是en_US，即美式英语。 获取哈希码的函数
    private void getSubtypeHashCode(Context context) {
        //String[] LOCAL_LANGUAGES = {"en_US","en_GB"};
        final String inputmethodPackageName = "com.android.inputmethod.latin";
 
        final InputMethodManager imm = (InputMethodManager) context.getSystemService( Context.INPUT_METHOD_SERVICE);
        final StringBuilder builder = new StringBuilder();
 
        for (InputMethodInfo info : imm.getInputMethodList()) {
            if (inputmethodPackageName.equals(info.getPackageName())) {
                for (int i = 0; i < info.getSubtypeCount(); i++) {
                    final InputMethodSubtype subtype = info.getSubtypeAt(i);
                    final String locale = subtype.getLocale().toString();
                    //for (String str : LOCAL_LANGUAGES) {
                    //    if (str.equals(locale)) {
                            builder.append(locale);
                            builder.append(" hashcode:");
                            builder.append(subtype.hashCode());
                            builder.append("\n");
                            Log.i(TAG,"get local:"+ locale + "hashcode:" + subtype.hashCode());
                    //    }
                    //}
                }
                break;
            }
        }
        //frhashcode:843948332 法语
        Log.i(TAG,"get hascode end--->"+builder.toString());
    }

2.frameworks\base\packages\SettingsProvider\src\com\android\providers\settings\DatabaseHelper.java

    private void loadSecureSettings(SQLiteDatabase db) {
        SQLiteStatement stmt = null;
        try {
            stmt = db.compileStatement("INSERT OR IGNORE INTO secure(name,value)"
                    + " VALUES(?,?);");
 
            // Don't do this.  The SystemServer will initialize ADB_ENABLED from a
            // persistent system property instead.
            //loadSetting(stmt, Settings.Secure.ADB_ENABLED, 0);
            
            //loadSetting(stmt, Settings.Secure.ENABLED_INPUT_METHODS, defaultIme);
            //loadSetting(stmt, Settings.Secure.DEFAULT_INPUT_METHOD, defaultIme);    
//demo            
//loadSetting(stmt, Settings.Secure.ENABLED_INPUT_METHODS,"com.android.inputmethod.latin/.LatinIME;816242702;-921088104");//选中的输入法 
//loadSetting(stmt, Settings.Secure.DEFAULT_INPUT_METHOD, "com.android.inputmethod.latin/.LatinIME");// 默认输入法为系统输入法
//loadSetting(stmt, Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE, "816242702"); // 默认输入法的默认语言

//success
+loadStringSetting(stmt, Settings.Secure.ENABLED_INPUT_METHODS,R.string.config_enable_input_method ); 
+loadStringSetting(stmt, Settings.Secure.DEFAULT_INPUT_METHOD,R.string.config_default_input_method );

https://blog.csdn.net/qq503393230/article/details/133762312

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