Not to set IME when the current IME was disabled, because framework will find an applicable IME when the current IME was unset.

Bug: 3186000

- This enables us to share the code between Settings and the framework.
- Removed the parameter for lastImeTicked because an applicable IME can be found in the framework.

Change-Id: Icfb6168c5a22506f225bfe58425adeb540835456

src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java

@@ -52,8 +52,6 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
 
     final TextUtils.SimpleStringSplitter mStringColonSplitter
             = new TextUtils.SimpleStringSplitter(':');
-    
-    private String mLastTickedInputMethodId;
 
     private AlertDialog mDialog = null;
     
@@ -145,7 +143,6 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
 
         InputMethodAndSubtypeUtil.loadInputMethodSubtypeList(
                 this, getContentResolver(), mInputMethodProperties);
-        mLastTickedInputMethodId = null;
 
         if (mLanguagePref != null) {
             Configuration conf = getResources().getConfiguration();
@@ -161,7 +158,7 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
     public void onPause() {
         super.onPause();
         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this, getContentResolver(),
-                mInputMethodProperties, mHaveHardKeyboard, mLastTickedInputMethodId);
+                mInputMethodProperties, mHaveHardKeyboard);
     }
 
     @Override
@@ -184,7 +181,6 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
                         selImi = imi;
                         if (isSystemIme(imi)) {
                             // This is a built-in IME, so no need to warn.
-                            mLastTickedInputMethodId = id;
                             return super.onPreferenceTreeClick(preferenceScreen, preference);
                         }
                     }
@@ -203,7 +199,6 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
                                     new DialogInterface.OnClickListener() {
                                         public void onClick(DialogInterface dialog, int which) {
                                             chkPref.setChecked(true);
-                                            mLastTickedInputMethodId = id;
                                         }
 
                             })
@@ -223,8 +218,6 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment {
                         R.string.ime_security_warning,
                         selImi.getServiceInfo().applicationInfo.loadLabel(getPackageManager())));
                 mDialog.show();
-            } else if (id.equals(mLastTickedInputMethodId)) {
-                mLastTickedInputMethodId = null;
             }
         } else if (preference instanceof PreferenceScreen) {
             if (preference.getFragment() != null) {

src/com/android/settings/inputmethod/InputMethodAndSubtypeEnabler.java

@@ -42,8 +42,6 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
 
     private List<InputMethodInfo> mInputMethodProperties;
 
-    private String mLastTickedInputMethodId;
-
     private AlertDialog mDialog = null;
 
     @Override
@@ -60,14 +58,13 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
         super.onResume();
         InputMethodAndSubtypeUtil.loadInputMethodSubtypeList(
                 this, getContentResolver(), mInputMethodProperties);
-        mLastTickedInputMethodId = null;
     }
 
     @Override
     public void onPause() {
         super.onPause();
         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this, getContentResolver(),
-                mInputMethodProperties, mHaveHardKeyboard, mLastTickedInputMethodId);
+                mInputMethodProperties, mHaveHardKeyboard);
     }
 
     @Override
@@ -89,7 +86,6 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
                             InputMethodAndSubtypeUtil.setSubtypesPreferenceEnabled(
                                     this, mInputMethodProperties, id, true);
                             // This is a built-in IME, so no need to warn.
-                            mLastTickedInputMethodId = id;
                             return super.onPreferenceTreeClick(preferenceScreen, preference);
                         }
                         break;
@@ -111,7 +107,6 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
                                             InputMethodAndSubtypeUtil.setSubtypesPreferenceEnabled(
                                                     InputMethodAndSubtypeEnabler.this,
                                                     mInputMethodProperties, id, true);
-                                            mLastTickedInputMethodId = id;
                                         }
 
                             })
@@ -132,9 +127,6 @@ public class InputMethodAndSubtypeEnabler extends SettingsPreferenceFragment {
                         selImi.getServiceInfo().applicationInfo.loadLabel(getPackageManager())));
                 mDialog.show();
             } else {
-                if (id.equals(mLastTickedInputMethodId)) {
-                    mLastTickedInputMethodId = null;
-                }
                 InputMethodAndSubtypeUtil.setSubtypesPreferenceEnabled(
                         this, mInputMethodProperties, id, false);
             }

src/com/android/settings/inputmethod/InputMethodAndSubtypeUtil.java

@@ -98,15 +98,13 @@ public class InputMethodAndSubtypeUtil {
 
     public static void saveInputMethodSubtypeList(
             SettingsPreferenceFragment context, ContentResolver resolver,
-            List<InputMethodInfo> inputMethodProperties,
+            List<InputMethodInfo> inputMethodProperties, boolean hasHardKeyboard) {
-            boolean hasHardKeyboard, String lastTickedInputMethodId) {
         String currentInputMethodId = Settings.Secure.getString(resolver,
                 Settings.Secure.DEFAULT_INPUT_METHOD);
         final int selectedInputMethodSubtype = getInputMethodSubtypeSelected(resolver);
 
         StringBuilder builder = new StringBuilder();
         StringBuilder disabledSysImes = new StringBuilder();
-        InputMethodInfo firstEnabledIMI = null;
         int firstSubtypeHashCode = NOT_A_SUBTYPE_ID;
 
         final boolean onlyOneIME = inputMethodProperties.size() == 1;
@@ -121,9 +119,6 @@ public class InputMethodAndSubtypeUtil {
                     || (pref != null && pref.isChecked())) {
                 if (builder.length() > 0) builder.append(INPUT_METHOD_SEPARATER);
                 builder.append(id);
-                if (firstEnabledIMI == null) {
-                    firstEnabledIMI = property;
-                }
                 for (InputMethodSubtype subtype : property.getSubtypes()) {
                     CheckBoxPreference subtypePref = (CheckBoxPreference) context.findPreference(
                             id + subtype.hashCode());
@@ -141,8 +136,11 @@ public class InputMethodAndSubtypeUtil {
             } else if (isCurrentInputMethod) {
                 // We are processing the current input method, but found that it's not enabled.
                 // This means that the current input method has been uninstalled.
-                // If currentInputMethod is already uninstalled, selects last ticked IME
+                // If currentInputMethod is already uninstalled, InputMethodManagerService will
-                currentInputMethodId = lastTickedInputMethodId;
+                // find the applicable IME from the history and the system locale.
+                if (DEBUG) {
+                    Log.d(TAG, "Current IME was uninstalled or disabled.");
+                }
             }
             // If it's a disabled system ime, add it to the disabled list so that it
             // doesn't get enabled automatically on any changes to the package list
@@ -152,15 +150,6 @@ public class InputMethodAndSubtypeUtil {
             }
         }
 
-        // If the last input method is unset, set it as the first enabled one.
-        if (TextUtils.isEmpty(currentInputMethodId)) {
-            if (firstEnabledIMI != null) {
-                currentInputMethodId = firstEnabledIMI.getId();
-            } else {
-                currentInputMethodId = null;
-            }
-        }
-
         if (DEBUG) {
             Log.d(TAG, "--- Save enabled inputmethod settings. :" + builder.toString());
             Log.d(TAG, "--- Save disable system inputmethod settings. :"
@@ -183,6 +172,8 @@ public class InputMethodAndSubtypeUtil {
                 Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());
         Settings.Secure.putString(resolver,
                 Settings.Secure.DISABLED_SYSTEM_INPUT_METHODS, disabledSysImes.toString());
+        // If the current input method is unset, InputMethodManagerService will find the applicable
+        // IME from the history and the system locale.
         Settings.Secure.putString(resolver, Settings.Secure.DEFAULT_INPUT_METHOD,
                 currentInputMethodId != null ? currentInputMethodId : "");
     }