Android默认输入法语言的修改以及SettingsProvider作用

 <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>

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"};//默认开启输入法的语言
    @Overridepublic 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/.LatinIMEfinal InputMethodManager imm = (InputMethodManager) context.getSystemService( Context.INPUT_METHOD_SERVICE);final StringBuilder builder = new StringBuilder();// Get sub type hash codefor (InputMethodInfo info : imm.getInputMethodList()) {if (currentPackageName.equals(info.getPackageName())) {Log.i(TAG,"info.getSubtypeCount()="+info.getSubtypeCount());//55for (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分别代表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/.LatinIMEif(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; }}