reset inputMethod settings (#25)

app/src/main/java/com/cobo/cold/MainApplication.java

@@ -23,6 +23,7 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.text.TextUtils;
 
@@ -76,6 +77,17 @@ public class MainApplication extends Application {
         shouldLock = Utilities.hasVaultCreated(this);
 
         startAttackCheckingService();
+        resetInputMethodSettings();
+    }
+
+    private void resetInputMethodSettings() {
+        if (!Utilities.isInputSettingsCleared(this)) {
+            new Thread(() -> {
+                PackageManager pm = getPackageManager();
+                pm.clearApplicationUserData("com.google.android.inputmethod.pinyin", null);
+                Utilities.setInputSettingsCleared(this);
+            }).start();
+        }
     }
 
     private void startAttackCheckingService() {

app/src/main/java/com/cobo/cold/Utilities.java

@@ -55,6 +55,7 @@ public class Utilities {
     public static final String PREFERENCE_KEY_RANDOM_SALT = "random_salt";
     public static final String FINGERPRINT_PASSWORD = "fingerprint_password";
     public static final String ATTACK_DETECTED = "attack_detected";
+    public static final String INPUT_SETTINGS_CLEARED = "input_settings_cleared";
 
     public static void alert(AppCompatActivity activity,
                              @Nullable String title, @NonNull String message,
@@ -226,4 +227,14 @@ public class Utilities {
         SharedPreferences sp = context.getSharedPreferences(PREFERENCE_SECRET, MODE_PRIVATE);
         return sp.getBoolean(ATTACK_DETECTED,false);
     }
+
+    public static boolean isInputSettingsCleared(Context context) {
+        SharedPreferences sp = context.getSharedPreferences(PREFERENCE_SECRET, MODE_PRIVATE);
+        return sp.getBoolean(INPUT_SETTINGS_CLEARED,false);
+    }
+
+    public static void setInputSettingsCleared(Context context) {
+        SharedPreferences sp = context.getSharedPreferences(PREFERENCE_SECRET, MODE_PRIVATE);
+        sp.edit().putBoolean(INPUT_SETTINGS_CLEARED,true).apply();
+    }
 }