Android預設IME語言的修改以及SettingsProvider作用

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Android源碼中預設的有三種IME：英文，中文，日文。對應的工程代碼路徑為：
<android_root>/packages/inputmethods/LatinIME/
<android_root>/packages/inputmethods/OpenWnn/
<android_root>/packages/inputmethods/PinyinIME/

一般情況下，預設都是選擇的LatinIMEIME，但是Android系統預設都是選擇系統語言作為IME，比如我們要用中文IME，
就需要切換系統語言為中文，或不勾選系統語言，主動勾選中文，但是我們怎麼修改預設的語言IME呢？
主要要關注3個模組代碼:
(1) Setting源碼
(2) SettingsProvider源碼
(3) LatinIMEIME源碼

方法一:(修改預設IME語言為英文和泰文,親測ok)
(1) 修改 packages\inputmethods\LatinIME\java\AndroidManifest.xml,增加

 <uses-permission android:name="android.permission.WRITE_SETTINGS" /> <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />  <receiver android:name="LatinImeReceiver" android:enabled="true">  <intent-filter>   <action android:name="android.intent.action.BOOT_COMPLETED" />   </intent-filter> </receiver>

 

(2) 在packages\inputmethods\LatinIME\java\src\com\android\inputmethod\latin目錄增加LatinImeReceiver.java檔案，源碼如下

package com.android.inputmethod.latin;  import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.SharedPreferences;import android.provider.Settings;import android.util.Log;import android.view.inputmethod.InputMethodInfo;import android.view.inputmethod.InputMethodManager;import android.view.inputmethod.InputMethodSubtype;import android.text.TextUtils;import android.content.SharedPreferences.Editor; import android.preference.PreferenceManager; public class LatinImeReceiver extends BroadcastReceiver {    private static final String TAG = LatinImeReceiver.class.getSimpleName();        private static final String[] DEFAULT_LATIN_IME_LANGUAGES = {"en_US","th"};//預設開啟IME的語言        @Override    public void onReceive(Context context, Intent intent) {    // Set the default input language at the system boot completed.                if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {            Log.i(TAG,"onReceive:ACTION_BOOT_COMPLETED");            SharedPreferences sp = context.getSharedPreferences("default_input_language_config", Context.MODE_PRIVATE);            boolean hasSet = sp.getBoolean("has_set", false);                     if (!hasSet) {                setDefaultSubtypes(context);                sp.edit().putBoolean("has_set", true).commit();            }        }    }         /**    * M: Set the default IME subtype.    */          private void setDefaultSubtypes(Context context) {          Log.i(TAG,"setDefaultSubtypes");        final String serviceName = "com.android.inputmethod.latin/.LatinIME";        final String currentPackageName = "com.android.inputmethod.latin";        final String enable = Settings.Secure.getString(context.getContentResolver(),                                                     Settings.Secure.ENABLED_INPUT_METHODS);        Log.i(TAG,"enable="+enable);//com.android.inputmethod.latin/.LatinIME                final InputMethodManager imm = (InputMethodManager) context.getSystemService( Context.INPUT_METHOD_SERVICE);        final StringBuilder builder = new StringBuilder();                     // Get sub type hash code        for (InputMethodInfo info : imm.getInputMethodList()) {            if (currentPackageName.equals(info.getPackageName())) {                Log.i(TAG,"info.getSubtypeCount()="+info.getSubtypeCount());//55                for (int i = 0; i < info.getSubtypeCount(); i++) {                      final InputMethodSubtype subtype = info.getSubtypeAt(i);                     final String locale = subtype.getLocale().toString();                    Log.i(TAG,"locale="+locale);                    if (isDefaultLocale(locale)) {                        Log.i(TAG, "default enabled subtype locale = " + locale);                        builder.append(‘;‘);                        builder.append(subtype.hashCode());                    }                }                break;            }        }              // Insert the sub type         if (builder.length() > 0 && !TextUtils.isEmpty(enable)) {            final String subtype = builder.toString();                 builder.setLength(0);                  final int index = enable.indexOf(serviceName) + serviceName.length();                            if (enable.length() > index) {                      builder.append(enable.substring(0, index));                     builder.append(subtype);                      builder.append(enable.substring(index));                 } else if (enable.length() == index) {                     builder.append(enable);                     builder.append(subtype);                 } else {                     return;                 }        }         else {              Log.w(TAG, "Build Latin IME subtype failed: " + " builder length = " + builder.length()     +                     "; enable isEmpty :" + TextUtils.isEmpty(enable));                 return;             }                          /*android/packages/inputmethods/LatinIME/java/res/xml/method.xml            -921088104;529847764分別代表en_US和th        */        Log.i(TAG,"commoit:"+builder.toString());//com.android.inputmethod.latin/.LatinIME;-921088104;529847764                // Commit the result          android.provider.Settings.Secure.putString(context.getContentResolver(),                                  android.provider.Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());         String lastInputMethodId = Settings.Secure.getString(context.getContentResolver(),                                                     Settings.Secure.DEFAULT_INPUT_METHOD);         Log.w(TAG, "DEFAULT_INPUT_METHOD = " + lastInputMethodId); //com.android.inputmethod.latin/.LatinIME                if(lastInputMethodId.equals(serviceName)) {              Log.w(TAG, "DEFAULT_INPUT_METHOD = com.android.inputmethod.latin/.LatinIME" );                        for (InputMethodInfo info : imm.getInputMethodList()) {                if (currentPackageName.equals(info.getPackageName())) {                    for (int i = 0; i < info.getSubtypeCount(); i++) {                         final InputMethodSubtype subtype = info.getSubtypeAt(i);                        final String[] locales = DEFAULT_LATIN_IME_LANGUAGES;                        Log.w(TAG, "i = " + i + ", locales[0] = " + locales[0]);                        if((subtype.getLocale()).equals(locales[0])) {                            Log.w(TAG, "putString " + subtype.hashCode());                            android.provider.Settings.Secure.putInt(context.getContentResolver(),                                  android.provider.Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE, subtype.hashCode());                        }                     }                  }            }        }    }             /**      * M: Check if the current locale is default or not.     */      private boolean isDefaultLocale (String locale) {         final String[] locales = DEFAULT_LATIN_IME_LANGUAGES;                 for (String s : locales) {            if (s.equals(locale)) {                return true;            }        }                return false;     }         }  

 

方法二:
還有一種修改方案:(在amlogic驗證是OK的)
(1) 首先frameworks\base\packages\SettingsProvider\res\values\defaults.xml 增加下面語句
<string name="def_input_methods">com.android.inputmethod.latin/.LatinIME;529847764;-921088104</string>

意思是增加英文和泰文IME,android/packages/inputmethods/LatinIME/java/res/xml/method.xml中有定義的
-921088104;529847764分別代表en_US和th

(2) 然後在frameworks\base\packages\SettingsProvider\src\com\android\providers\settings\DatabaseHelper.java
增加如下代碼
loadStringSetting(stmt, Settings.Secure.ENABLED_INPUT_METHODS, R.string.def_input_methods);

frameworks/base/packages/SettingsProvider的作用
我們在調用android.provider.Settings修改一些設定時，Settings會調用真正的SettingsProvider去訪問資料庫。
android把SettingsProvider的代碼放在了frameworks/base/packages下面。

Android framework系統預設設定修改
修改Settings源碼可修改系統設定項，Settings資料被存放於com.android.providers.settings/databases/settings.db 中，如果想修改系統啟動後載入的預設值，一種方法是直接修改settings.db的值，另一種就是修改SettingsProvider預設值
Settings應用能夠配置Android系統的各種設定，這些設定的預設值都是由frameworks中的SettingsProvider從資料庫中讀取的，
那麼第一次開機的時候這些資料都是從哪兒來的呢？
frameworks/base/packages/SettingsProvider/res/values/defaults.xml這個檔案就是用來儲存Android系統的預設設定
如果想定義defaults.xml中沒有的，在這裡添加後，需修改frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java，加入自己的儲存代碼。
例如：
600000設定關屏逾時時間的預設值
102 設定亮度的預設值
false設定是否允許安裝非Market應用程式的預設值

參考:
Android的語言設定（一）
http://blog.csdn.net/seker_xinjian/article/details/6288957

LatinIME怎麼預設勾選幾種語言
http://wenku.baidu.com/link?url=gAscqnKoMNOi_wzR3LEsk9kw-Hsp6k-hkWsW3_Jvyz3SmMXkENODD6XjRtS9BrndAS4iY2IuM8nQaxj05J4NUmBFdFE5-7nl9P9bVIwqfCm

Android framework系統預設設定修改
http://blog.csdn.net/tiantian715/article/details/7739294

在android settings.db資料庫中添加一項新的設定
http://www.2cto.com/kf/201303/198067.html