android: Move settings to compose and material UI 3

This changes lets us use the latest UI design from Google, Material 3.

Google only provides the material UI 3 themes for compose, compose only works with kotlin.

android/app/build.gradle.kts

@@ -56,6 +56,13 @@ dependencies {
 
     implementation("androidx.compose.material3:material3")
     implementation("androidx.activity:activity-compose:1.8.2")
+    implementation("androidx.compose.material:material-icons-extended")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.6.2")
+    implementation("androidx.lifecycle:lifecycle-runtime-compose:2.6.2")
+
+    implementation("com.github.alorma:compose-settings-ui-m3:1.0.3")
+    implementation("com.github.alorma:compose-settings-storage-preferences:1.0.3")
+    implementation("com.google.accompanist:accompanist-permissions:0.33.2-alpha")
 
     // Android Studio Preview support
     implementation("androidx.compose.ui:ui-tooling-preview")

android/app/src/main/AndroidManifest.xml

@@ -24,16 +24,19 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:requestLegacyExternalStorage="true"
-        android:roundIcon="@mipmap/ic_launcher_round">
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:theme="@style/Theme.MPD">
         <activity
-            android:name=".Settings"
+            android:name=".ui.SettingsActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
             </intent-filter>
         </activity>

android/app/src/main/java/org/musicpd/Main.java

@@ -25,6 +25,8 @@ import android.widget.RemoteViews;
 
 import androidx.core.app.ServiceCompat;
 
+import org.musicpd.ui.SettingsActivity;
+
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 
@@ -197,7 +199,7 @@ public class Main extends Service implements Runnable {
 			}
 		}, filter);
 
-		final Intent mainIntent = new Intent(this, Settings.class);
+		final Intent mainIntent = new Intent(this, SettingsActivity.class);
 		mainIntent.setAction("android.intent.action.MAIN");
 		mainIntent.addCategory("android.intent.category.LAUNCHER");
 		final PendingIntent contentIntent = PendingIntent.getActivity(this, 0,

android/app/src/main/java/org/musicpd/NetworkUtil.java

@@ -5,12 +5,15 @@ import android.net.ConnectivityManager;
 import android.net.LinkAddress;
 import android.net.LinkProperties;
 
+import androidx.annotation.Nullable;
+
 import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.util.List;
 
 public class NetworkUtil {
 
+    @Nullable
     public static String getDeviceIPV4Address(Context context) {
         ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         LinkProperties linkProperties = connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork());

android/app/src/main/java/org/musicpd/Settings.java

@@ -1,267 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-// Copyright The Music Player Daemon Project
-
-package org.musicpd;
-
-import java.util.LinkedList;
-
-import android.Manifest;
-import android.app.Activity;
-import android.content.pm.PackageManager;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.Message;
-import android.util.Log;
-import android.widget.ArrayAdapter;
-import android.widget.CheckBox;
-import android.widget.CompoundButton;
-import android.widget.CompoundButton.OnCheckedChangeListener;
-import android.widget.ListView;
-import android.widget.TextView;
-import android.widget.ToggleButton;
-
-public class Settings extends Activity {
-	private static final String TAG = "Settings";
-	private Main.Client mClient;
-	private TextView mTextStatus;
-	private ToggleButton mRunButton;
-	private boolean mFirstRun;
-	private LinkedList<String> mLogListArray = new LinkedList<String>();
-	private ListView mLogListView;
-	private ArrayAdapter<String> mLogListAdapter;
-
-	private static final int MAX_LOGS = 500;
-
-	private static final int MSG_ERROR = 0;
-	private static final int MSG_STOPPED = 1;
-	private static final int MSG_STARTED = 2;
-	private static final int MSG_LOG = 3;
-
-	private Handler mHandler = new Handler(new Handler.Callback() {
-		@Override
-		public boolean handleMessage(Message msg) {
-			switch (msg.what) {
-			case MSG_ERROR:
-				Log.d(TAG, "onError");
-
-				mClient.release();
-				connectClient();
-
-				mRunButton.setEnabled(false);
-				mRunButton.setChecked(false);
-
-				mTextStatus.setText((String)msg.obj);
-				mFirstRun = true;
-				break;
-			case MSG_STOPPED:
-				Log.d(TAG, "onStopped");
-				mRunButton.setEnabled(true);
-				if (!mFirstRun && Preferences.getBoolean(Settings.this, Preferences.KEY_RUN_ON_BOOT, false))
-					mRunButton.setChecked(true);
-				else
-					mRunButton.setChecked(false);
-				mFirstRun = true;
-				mTextStatus.setText("");
-				break;
-			case MSG_STARTED:
-				Log.d(TAG, "onStarted");
-				mRunButton.setChecked(true);
-				mFirstRun = true;
-				mTextStatus.setText("MPD service started");
-				break;
-			case MSG_LOG:
-				if (mLogListArray.size() > MAX_LOGS)
-					mLogListArray.remove(0);
-				String priority;
-				switch (msg.arg1) {
-				case Log.DEBUG:
-					priority = "D";
-					break;
-				case Log.ERROR:
-					priority = "E";
-					break;
-				case Log.INFO:
-					priority = "I";
-					break;
-				case Log.VERBOSE:
-					priority = "V";
-					break;
-				case Log.WARN:
-					priority = "W";
-					break;
-				default:
-					priority = "";
-				}
-				mLogListArray.add(priority + "/ " + (String)msg.obj);
-				mLogListAdapter.notifyDataSetChanged();
-
-				break;
-			}
-			return true;
-		}
-	});
-
-	private final OnCheckedChangeListener mOnRunChangeListener = new OnCheckedChangeListener() {
-		@Override
-		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-			if (mClient != null) {
-				if (isChecked) {
-					mClient.start();
-					if (Preferences.getBoolean(Settings.this,
-							Preferences.KEY_WAKELOCK, false))
-						mClient.setWakelockEnabled(true);
-					if (Preferences.getBoolean(Settings.this,
-							Preferences.KEY_PAUSE_ON_HEADPHONES_DISCONNECT, false))
-						mClient.setPauseOnHeadphonesDisconnect(true);
-				} else {
-					mClient.stop();
-				}
-			}
-		}
-	};
-
-	private final OnCheckedChangeListener mOnRunOnBootChangeListener = new OnCheckedChangeListener() {
-		@Override
-		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-			Preferences.putBoolean(Settings.this, Preferences.KEY_RUN_ON_BOOT, isChecked);
-			if (isChecked && mClient != null && !mRunButton.isChecked())
-				mRunButton.setChecked(true);
-		}
-	};
-
-	private final OnCheckedChangeListener mOnWakelockChangeListener = new OnCheckedChangeListener() {
-		@Override
-		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-			Preferences.putBoolean(Settings.this, Preferences.KEY_WAKELOCK, isChecked);
-			if (mClient != null && mClient.isRunning())
-				mClient.setWakelockEnabled(isChecked);
-		}
-	};
-
-	private final OnCheckedChangeListener mOnPauseOnHeadphonesDisconnectChangeListener = new OnCheckedChangeListener() {
-		@Override
-		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-			Preferences.putBoolean(Settings.this, Preferences.KEY_PAUSE_ON_HEADPHONES_DISCONNECT, isChecked);
-			if (mClient != null && mClient.isRunning())
-				mClient.setPauseOnHeadphonesDisconnect(isChecked);
-		}
-	};
-
-	@Override
-	protected void onCreate(Bundle savedInstanceState) {
-		/* TODO: this sure is the wrong place to request
-		   permissions - it will cause MPD to quit
-		   immediately; we should request permissions when we
-		   need them, but implementing that is complicated, so
-		   for now, we do it here to give users a quick
-		   solution for the problem */
-		requestAllPermissions();
-
-		setContentView(R.layout.settings);
-		mRunButton = (ToggleButton) findViewById(R.id.run);
-		mRunButton.setOnCheckedChangeListener(mOnRunChangeListener);
-
-		mTextStatus = (TextView) findViewById(R.id.status);
-
-		mLogListAdapter = new ArrayAdapter<String>(this, R.layout.log_item, mLogListArray);
-
-		mLogListView = (ListView) findViewById(R.id.log_list);
-		mLogListView.setAdapter(mLogListAdapter);
-		mLogListView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
-
-		CheckBox checkbox = (CheckBox) findViewById(R.id.run_on_boot);
-		checkbox.setOnCheckedChangeListener(mOnRunOnBootChangeListener);
-		if (Preferences.getBoolean(this, Preferences.KEY_RUN_ON_BOOT, false))
-			checkbox.setChecked(true);
-
-		checkbox = (CheckBox) findViewById(R.id.wakelock);
-		checkbox.setOnCheckedChangeListener(mOnWakelockChangeListener);
-		if (Preferences.getBoolean(this, Preferences.KEY_WAKELOCK, false))
-			checkbox.setChecked(true);
-
-		checkbox = (CheckBox) findViewById(R.id.pause_on_headphones_disconnect);
-		checkbox.setOnCheckedChangeListener(mOnPauseOnHeadphonesDisconnectChangeListener);
-		if (Preferences.getBoolean(this, Preferences.KEY_PAUSE_ON_HEADPHONES_DISCONNECT, false))
-			checkbox.setChecked(true);
-
-		TextView networkAddressTextView = (TextView) findViewById(R.id.networkAddress);
-		String deviceIPV4Address = NetworkUtil.getDeviceIPV4Address(this);
-		networkAddressTextView.setText(deviceIPV4Address);
-
-		super.onCreate(savedInstanceState);
-	}
-
-	private void checkRequestPermission(String permission) {
-		if (checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED)
-			return;
-
-		try {
-			this.requestPermissions(new String[]{permission}, 0);
-		} catch (Exception e) {
-			Log.e(TAG, "requestPermissions(" + permission + ") failed",
-			      e);
-		}
-	}
-
-	private void requestAllPermissions() {
-		if (android.os.Build.VERSION.SDK_INT < 23)
-			/* we don't need to request permissions on
-			   this old Android version */
-			return;
-
-		/* starting with Android 6.0, we need to explicitly
-		   request all permissions before using them;
-		   mentioning them in the manifest is not enough */
-
-		checkRequestPermission(Manifest.permission.READ_EXTERNAL_STORAGE);
-	}
-
-	private void connectClient() {
-		mClient = new Main.Client(this, new Main.Client.Callback() {
-
-			private void removeMessages() {
-				/* don't remove log messages */
-				mHandler.removeMessages(MSG_STOPPED);
-				mHandler.removeMessages(MSG_STARTED);
-				mHandler.removeMessages(MSG_ERROR);
-			}
-
-			@Override
-			public void onStopped() {
-				removeMessages();
-				mHandler.sendEmptyMessage(MSG_STOPPED);
-			}
-
-			@Override
-			public void onStarted() {
-				removeMessages();
-				mHandler.sendEmptyMessage(MSG_STARTED);
-			}
-
-			@Override
-			public void onError(String error) {
-				removeMessages();
-				mHandler.sendMessage(Message.obtain(mHandler, MSG_ERROR, error));
-			}
-
-			@Override
-			public void onLog(int priority, String msg) {
-				mHandler.sendMessage(Message.obtain(mHandler, MSG_LOG, priority, 0, msg));
-			}
-		});
-	}
-
-	@Override
-	protected void onStart() {
-		mFirstRun = false;
-		connectClient();
-		super.onStart();
-	}
-
-	@Override
-	protected void onStop() {
-		mClient.release();
-		mClient = null;
-		super.onStop();
-	}
-}

android/app/src/main/java/org/musicpd/ui/NetworkAddress.kt

@@ -0,0 +1,39 @@
+package org.musicpd.ui
+
+import android.app.Application
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Wifi
+import androidx.compose.material3.Icon
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import org.musicpd.NetworkUtil
+
+@Composable
+fun NetworkAddress() {
+    val address = NetworkUtil.getDeviceIPV4Address(LocalContext.current)
+    val padding = 4.dp
+    Row(
+        Modifier
+            .padding(padding)
+            .fillMaxWidth(),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.Center
+    ) {
+        Icon(
+            imageVector = Icons.Default.Wifi,
+            contentDescription = "Wifi")
+        Spacer(Modifier.size(padding))
+        Text(text = address ?: "")
+    }
+}
+

android/app/src/main/java/org/musicpd/ui/Preferences.kt

@@ -0,0 +1,52 @@
+package org.musicpd.ui
+
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.BatteryAlert
+import androidx.compose.material.icons.filled.Headphones
+import androidx.compose.material.icons.filled.PowerSettingsNew
+import androidx.compose.material3.Icon
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import com.alorma.compose.settings.storage.preferences.rememberPreferenceBooleanSettingState
+import com.alorma.compose.settings.ui.SettingsSwitch
+import org.musicpd.Preferences
+import org.musicpd.R
+
+@Composable
+fun SettingsOptions(
+    onBootChanged: (Boolean) -> Unit,
+    onWakeLockChanged: (Boolean) -> Unit,
+    onHeadphonesChanged: (Boolean) -> Unit
+) {
+    val bootState = rememberPreferenceBooleanSettingState(
+        key = Preferences.KEY_RUN_ON_BOOT,
+        defaultValue = false
+    )
+    val wakelockState =
+        rememberPreferenceBooleanSettingState(key = Preferences.KEY_WAKELOCK, defaultValue = false)
+    val headphoneState = rememberPreferenceBooleanSettingState(
+        key = Preferences.KEY_PAUSE_ON_HEADPHONES_DISCONNECT,
+        defaultValue = false
+    )
+
+    SettingsSwitch(
+        icon = { Icon(imageVector = Icons.Default.PowerSettingsNew, contentDescription = "Power") },
+        title = { Text(text = stringResource(R.string.checkbox_run_on_boot)) },
+        onCheckedChange = onBootChanged,
+        state = bootState
+    )
+    SettingsSwitch(
+        icon = { Icon(imageVector = Icons.Default.BatteryAlert, contentDescription = "Battery") },
+        title = { Text(text = stringResource(R.string.checkbox_wakelock)) },
+        onCheckedChange = onWakeLockChanged,
+        state = wakelockState
+    )
+    SettingsSwitch(
+        icon = { Icon(imageVector = Icons.Default.Headphones, contentDescription = "Headphones") },
+        title = { Text(text = stringResource(R.string.checkbox_pause_on_headphones_disconnect)) },
+        onCheckedChange = onHeadphonesChanged,
+        state = headphoneState
+    )
+
+}

android/app/src/main/java/org/musicpd/ui/SettingsActivity.kt

@@ -0,0 +1,212 @@
+package org.musicpd.ui
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Circle
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberPermissionState
+import com.google.accompanist.permissions.shouldShowRationale
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.musicpd.Main
+import org.musicpd.R
+
+class SettingsActivity : ComponentActivity() {
+
+    private val settingsViewModel: SettingsViewModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContent {
+            MaterialTheme {
+                SettingsContainer(settingsViewModel)
+            }
+        }
+    }
+
+    private fun connectClient() {
+        val client = Main.Client(this, object : Main.Client.Callback {
+            override fun onStopped() {
+                settingsViewModel.updateStatus("", false)
+            }
+
+            override fun onStarted() {
+                settingsViewModel.updateStatus("MPD Service Started", true)
+            }
+
+            override fun onError(error: String) {
+                settingsViewModel.removeClient()
+                settingsViewModel.updateStatus(error, false)
+                connectClient()
+            }
+
+            override fun onLog(priority: Int, msg: String) {
+                settingsViewModel.addLogItem(priority, msg)
+            }
+        })
+
+        settingsViewModel.setClient(client)
+    }
+
+    override fun onStart() {
+        //mFirstRun = false
+        connectClient()
+        super.onStart()
+    }
+
+    override fun onStop() {
+        settingsViewModel.removeClient()
+        super.onStop()
+    }
+}
+
+@OptIn(ExperimentalPermissionsApi::class)
+@Composable
+fun SettingsContainer(settingsViewModel: SettingsViewModel = viewModel()) {
+    val context = LocalContext.current
+
+    val storagePermissionState = rememberPermissionState(
+        android.Manifest.permission.READ_EXTERNAL_STORAGE
+    )
+
+    if (storagePermissionState.status.shouldShowRationale) {
+        Column(Modifier
+            .padding(4.dp)
+            .fillMaxWidth(),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center
+        ) {
+            Text(stringResource(id = R.string.external_files_permission_request))
+            Button(onClick = {  }) {
+                Text("Request permission")
+            }
+        }
+    } else {
+        Column {
+            NetworkAddress()
+            ServerStatus(settingsViewModel)
+            if (!storagePermissionState.status.isGranted) {
+                OutlinedButton(onClick = { storagePermissionState.launchPermissionRequest() }, Modifier
+                    .padding(4.dp)
+                    .fillMaxWidth()) {
+                    Text("Request external storage permission", color = MaterialTheme.colorScheme.secondary)
+                }
+            }
+            SettingsOptions(
+                onBootChanged = { newValue ->
+                    if (newValue) {
+                        settingsViewModel.startMPD(context)
+                    }
+                },
+                onWakeLockChanged = { newValue ->
+                    settingsViewModel.setWakelockEnabled(newValue)
+                },
+                onHeadphonesChanged = { newValue ->
+                    settingsViewModel.setPauseOnHeadphonesDisconnect(newValue)
+                }
+            )
+            LogView(settingsViewModel.logItemFLow.collectAsStateWithLifecycle())
+        }
+    }
+}
+
+@Composable
+fun ServerStatus(settingsViewModel: SettingsViewModel) {
+    val context = LocalContext.current
+
+    val statusUiState by settingsViewModel.statusUIState.collectAsState()
+
+    Column {
+        Row(
+            Modifier
+                .padding(4.dp)
+                .fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceEvenly
+        ) {
+            Row {
+                Icon(
+                    imageVector = Icons.Default.Circle,
+                    contentDescription = "",
+                    tint = if (statusUiState.running) Color(0xFFB8F397) else Color(0xFFFFDAD6)
+                )
+                Text(text = if (statusUiState.running) "Running" else "Stopped")
+            }
+            Button(onClick = {
+                if (statusUiState.running)
+                    settingsViewModel.stopMPD()
+                else
+                    settingsViewModel.startMPD(context)
+            }) {
+                Text(text = if (statusUiState.running) "Stop MPD" else "Start MPD")
+            }
+        }
+        Row(
+            Modifier
+                .padding(4.dp)
+                .fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceEvenly
+        ) {
+            Text(text = statusUiState.statusMessage)
+        }
+    }
+}
+
+@Composable
+fun LogView(messages: State<List<String>>) {
+    val state = rememberLazyListState()
+
+    LazyColumn(
+        Modifier.padding(4.dp),
+        state
+    ) {
+        items(messages.value) { message ->
+            Text(text = message, fontFamily = FontFamily.Monospace)
+        }
+        CoroutineScope(Dispatchers.Main).launch {
+            state.scrollToItem(messages.value.count(), 0)
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun SettingsPreview() {
+    MaterialTheme {
+        SettingsContainer()
+    }
+}

android/app/src/main/java/org/musicpd/ui/SettingsViewModel.kt

@@ -0,0 +1,84 @@
+package org.musicpd.ui
+
+import android.content.Context
+import android.util.Log
+import androidx.lifecycle.ViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import org.musicpd.Main
+import org.musicpd.Preferences
+
+private const val MAX_LOGS = 500
+
+class SettingsViewModel : ViewModel() {
+
+    private var mClient: Main.Client? = null
+
+    private val _logItemFLow = MutableStateFlow(listOf<String>())
+    val logItemFLow: StateFlow<List<String>> = _logItemFLow
+
+    data class StatusUiState(
+        val statusMessage: String = "",
+        val running: Boolean = false
+    )
+
+    private val _statusUIState = MutableStateFlow(StatusUiState())
+    val statusUIState: StateFlow<StatusUiState> = _statusUIState.asStateFlow()
+
+    fun addLogItem(priority: Int, message: String) {
+        if (_logItemFLow.value.size > MAX_LOGS) {
+            _logItemFLow.value = _logItemFLow.value.drop(1)
+        }
+
+        val priorityString: String = when (priority) {
+            Log.DEBUG -> "D"
+            Log.ERROR -> "E"
+            Log.INFO -> "I"
+            Log.VERBOSE -> "V"
+            Log.WARN -> "W"
+            else -> ""
+        }
+
+        _logItemFLow.value = _logItemFLow.value + ("$priorityString/$message")
+    }
+
+    fun updateStatus(message: String, running: Boolean) {
+        _statusUIState.value = StatusUiState(message, running)
+    }
+
+    fun setClient(client: Main.Client) {
+        mClient = client
+    }
+
+    fun removeClient() {
+        mClient?.release()
+        mClient = null
+    }
+
+    fun startMPD(context: Context) {
+        mClient?.start()
+        if (Preferences.getBoolean(
+                context,
+                Preferences.KEY_WAKELOCK, false
+            )
+        ) mClient?.setWakelockEnabled(true)
+        if (Preferences.getBoolean(
+                context,
+                Preferences.KEY_PAUSE_ON_HEADPHONES_DISCONNECT, false
+            )
+        ) mClient?.setPauseOnHeadphonesDisconnect(true)
+    }
+
+    fun stopMPD() {
+        mClient?.stop()
+    }
+
+    fun setWakelockEnabled(enabled: Boolean) {
+        mClient?.setWakelockEnabled(enabled)
+    }
+
+    fun setPauseOnHeadphonesDisconnect(enabled: Boolean) {
+        mClient?.setPauseOnHeadphonesDisconnect(enabled)
+    }
+}

android/app/src/main/res/layout/log_item.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<TextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:typeface="monospace" />

android/app/src/main/res/layout/settings.xml

@@ -1,65 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:orientation="vertical">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:gravity="center_vertical">
-
-        <ImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:scaleType="center"
-            android:src="@drawable/baseline_wifi_24"
-            android:layout_margin="4dp"/>
-
-        <androidx.appcompat.widget.AppCompatTextView
-            android:id="@+id/networkAddress"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_marginRight="24sp"
-            android:gravity="center"
-            android:padding="4dp"
-            android:textSize="24sp" />
-    </LinearLayout>
-
-    <ToggleButton
-        android:id="@+id/run"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:textOff="@string/toggle_button_run_off"
-        android:textOn="@string/toggle_button_run_on" />
-
-    <CheckBox
-        android:id="@+id/run_on_boot"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="@string/checkbox_run_on_boot" />
-
-    <CheckBox
-        android:id="@+id/wakelock"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="@string/checkbox_wakelock" />
-
-    <CheckBox
-        android:id="@+id/pause_on_headphones_disconnect"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="@string/checkbox_pause_on_headphones_disconnect" />
-
-    <TextView
-        android:id="@+id/status"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content" />
-
-    <ListView
-        android:id="@+id/log_list"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:paddingTop="10dip" />
-
-</LinearLayout>

android/app/src/main/res/values/strings.xml

@@ -9,4 +9,5 @@
   <string name="checkbox_run_on_boot">Run MPD automatically on boot</string>
   <string name="checkbox_wakelock">Prevent suspend when MPD is running (Wakelock)</string>
   <string name="checkbox_pause_on_headphones_disconnect">Pause MPD when headphones disconnect</string>
+  <string name="external_files_permission_request">MPD requires access to external files to play local music. Please grant the permission.</string>
 </resources>

android/app/src/main/res/values/themes.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.MPD" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>