feat: add Quick Settings tile for keyboard switching (#1113)

Add TileService to show keyboard picker from notification shade:
- KeyboardTileService.kt: TileService implementation (Android 7.0+)
- AndroidManifest.xml: Register tile service with BIND_QUICK_SETTINGS_TILE

Tile shows active/inactive state based on current input method.
Tapping opens system input method picker for quick switching.

— claude-opus-4-5-20251101

Author: tribixbite

AndroidManifest.xml

@@ -31,6 +31,18 @@
       <meta-data android:name="android.view.im" android:resource="@xml/method"/>
     </service>
 
+    <!-- Quick Settings Tile for keyboard switching (Android 7.0+) -->
+    <service
+        android:name="tribixbite.cleverkeys.KeyboardTileService"
+        android:label="@string/app_name"
+        android:icon="@mipmap/ic_launcher"
+        android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
+        android:exported="true">
+      <intent-filter>
+        <action android:name="android.service.quicksettings.action.QS_TILE"/>
+      </intent-filter>
+    </service>
+
     <activity android:name="tribixbite.cleverkeys.SettingsActivity" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/settingsTheme" android:exported="true" android:directBootAware="true">
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>

src/main/kotlin/tribixbite/cleverkeys/KeyboardTileService.kt

@@ -0,0 +1,70 @@
+package tribixbite.cleverkeys
+
+import android.content.Intent
+import android.os.Build
+import android.provider.Settings
+import android.service.quicksettings.Tile
+import android.service.quicksettings.TileService
+import android.view.inputmethod.InputMethodManager
+import androidx.annotation.RequiresApi
+
+/**
+ * Quick Settings tile for CleverKeys keyboard.
+ *
+ * Tapping the tile opens the input method picker, allowing users to quickly
+ * switch to CleverKeys or see available keyboards.
+ *
+ * Requires Android 7.0 (API 24) or higher.
+ *
+ * @see <a href="https://github.com/Julow/Unexpected-Keyboard/issues/1113">Issue #1113</a>
+ */
+@RequiresApi(Build.VERSION_CODES.N)
+class KeyboardTileService : TileService() {
+
+    override fun onStartListening() {
+        super.onStartListening()
+        updateTileState()
+    }
+
+    override fun onClick() {
+        super.onClick()
+
+        // Show input method picker dialog
+        val imm = getSystemService(INPUT_METHOD_SERVICE) as? InputMethodManager
+        if (imm != null) {
+            imm.showInputMethodPicker()
+        } else {
+            // Fallback: open keyboard settings
+            val intent = Intent(Settings.ACTION_INPUT_METHOD_SETTINGS).apply {
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
+            startActivityAndCollapse(intent)
+        }
+    }
+
+    override fun onTileAdded() {
+        super.onTileAdded()
+        updateTileState()
+    }
+
+    private fun updateTileState() {
+        val tile = qsTile ?: return
+
+        // Check if CleverKeys is the current input method
+        val currentIme = Settings.Secure.getString(
+            contentResolver,
+            Settings.Secure.DEFAULT_INPUT_METHOD
+        )
+        val isCleverKeysActive = currentIme?.contains(packageName) == true
+
+        tile.state = if (isCleverKeysActive) Tile.STATE_ACTIVE else Tile.STATE_INACTIVE
+        tile.label = getString(R.string.app_name)
+        tile.contentDescription = if (isCleverKeysActive) {
+            "CleverKeys is active. Tap to switch keyboard."
+        } else {
+            "Tap to switch to CleverKeys keyboard."
+        }
+
+        tile.updateTile()
+    }
+}