Add custom settings UI

app/src/main/AndroidManifest.xml

@@ -25,6 +25,10 @@
         android:allowBackup="false"
         tools:ignore="GoogleAppIndexingWarning">
 
+        <activity
+            android:name=".settings.SettingsActivity"
+            android:exported="true" />
+
         <activity
             android:name="com.stevesoltys.backup.activity.MainActivity"
             android:label="@string/app_name">

app/src/main/java/com/stevesoltys/backup/settings/SettingsActivity.java

@@ -0,0 +1,52 @@
+package com.stevesoltys.backup.settings;
+
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.widget.Toast;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.stevesoltys.backup.R;
+
+import static android.widget.Toast.LENGTH_SHORT;
+import static java.util.Objects.requireNonNull;
+
+public class SettingsActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.activity_settings);
+
+        requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuInflater inflater = getMenuInflater();
+        inflater.inflate(R.menu.settings_menu, menu);
+        if (getResources().getBoolean(R.bool.show_restore_in_settings)) {
+            menu.findItem(R.id.action_restore).setVisible(true);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            onBackPressed();
+            return true;
+        } else if (item.getItemId() == R.id.action_backup) {
+            Toast.makeText(this, "Not yet implemented", LENGTH_SHORT).show();
+            return true;
+        } else if (item.getItemId() == R.id.action_restore) {
+            Toast.makeText(this, "Not yet implemented", LENGTH_SHORT).show();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}

app/src/main/java/com/stevesoltys/backup/settings/SettingsFragment.java

@@ -0,0 +1,77 @@
+package com.stevesoltys.backup.settings;
+
+import android.app.backup.IBackupManager;
+import android.content.ContentResolver;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.provider.Settings;
+import android.util.Log;
+
+import androidx.preference.PreferenceFragmentCompat;
+import androidx.preference.TwoStatePreference;
+
+import com.stevesoltys.backup.R;
+
+import static android.content.Context.BACKUP_SERVICE;
+import static android.os.ServiceManager.getService;
+import static android.provider.Settings.Secure.BACKUP_AUTO_RESTORE;
+
+public class SettingsFragment extends PreferenceFragmentCompat {
+
+    private final static String TAG = SettingsFragment.class.getSimpleName();
+
+    private IBackupManager backupManager;
+
+    private TwoStatePreference backup;
+    private TwoStatePreference autoRestore;
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        setPreferencesFromResource(R.xml.settings, rootKey);
+
+        backupManager = IBackupManager.Stub.asInterface(getService(BACKUP_SERVICE));
+
+        backup = (TwoStatePreference) findPreference("backup");
+        backup.setOnPreferenceChangeListener((preference, newValue) -> {
+            boolean enabled = (boolean) newValue;
+            try {
+                backupManager.setBackupEnabled(enabled);
+                return true;
+            } catch (RemoteException e) {
+                e.printStackTrace();
+                backup.setChecked(!enabled);
+                return false;
+            }
+        });
+
+        autoRestore = (TwoStatePreference) findPreference("auto_restore");
+        autoRestore.setOnPreferenceChangeListener((preference, newValue) -> {
+            boolean enabled = (boolean) newValue;
+            try {
+                backupManager.setAutoRestore(enabled);
+                return true;
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error communicating with BackupManager", e);
+                autoRestore.setChecked(!enabled);
+                return false;
+            }
+        });
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        try {
+            backup.setChecked(backupManager.isBackupEnabled());
+            backup.setEnabled(true);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error communicating with BackupManager", e);
+            backup.setEnabled(false);
+        }
+
+        ContentResolver resolver = requireContext().getContentResolver();
+        autoRestore.setChecked(Settings.Secure.getInt(resolver, BACKUP_AUTO_RESTORE, 1) == 1);
+    }
+
+}

app/src/main/java/com/stevesoltys/backup/transport/ConfigurableBackupTransport.java

@@ -4,11 +4,13 @@ import android.app.backup.BackupTransport;
 import android.app.backup.RestoreDescription;
 import android.app.backup.RestoreSet;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.net.Uri;
 import android.os.ParcelFileDescriptor;
 import android.util.Log;
 
+import com.stevesoltys.backup.settings.SettingsActivity;
 import com.stevesoltys.backup.transport.component.BackupComponent;
 import com.stevesoltys.backup.transport.component.RestoreComponent;
 import com.stevesoltys.backup.transport.component.provider.ContentProviderBackupComponent;
@@ -27,11 +29,14 @@ public class ConfigurableBackupTransport extends BackupTransport {
 
     private static final String TAG = TRANSPORT_DIRECTORY_NAME;
 
+    private final Context context;
+
     private final BackupComponent backupComponent;
 
     private final RestoreComponent restoreComponent;
 
     ConfigurableBackupTransport(Context context) {
+        this.context = context;
         backupComponent = new ContentProviderBackupComponent(context);
         restoreComponent = new ContentProviderRestoreComponent(context);
     }
@@ -57,6 +62,11 @@ public class ConfigurableBackupTransport extends BackupTransport {
         return 0;
     }
 
+    @Override
+    public Intent dataManagementIntent() {
+        return new Intent(context, SettingsActivity.class);
+    }
+
     @Override
     public boolean isAppEligibleForBackup(PackageInfo targetPackage, boolean isFullBackup) {
         return true;

app/src/main/res/drawable/ic_cloud_upload.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?android:attr/textColorSecondary"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M19.35,10.04C18.67,6.59 15.64,4 12,4 9.11,4 6.6,5.64 5.35,8.04 2.34,8.36 0,10.91 0,14c0,3.31 2.69,6 6,6h13c2.76,0 5,-2.24 5,-5 0,-2.64 -2.05,-4.78 -4.65,-4.96zM14,13v4h-4v-4H7l5,-5 5,5h-3z" />
+</vector>

app/src/main/res/drawable/ic_info_outline.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?android:attr/textColorSecondary"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M11,17h2v-6h-2v6zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8zM11,9h2L13,7h-2v2z" />
+</vector>

app/src/main/res/drawable/ic_storage.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?android:attr/textColorSecondary"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M2,20h20v-4L2,16v4zM4,17h2v2L4,19v-2zM2,4v4h20L22,4L2,4zM6,7L4,7L4,5h2v2zM2,14h20v-4L2,10v4zM4,11h2v2L4,13v-2z" />
+</vector>

app/src/main/res/layout/activity_settings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<fragment xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragment"
+    android:name="com.stevesoltys.backup.settings.SettingsFragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />

app/src/main/res/menu/settings_menu.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <item
+        android:id="@+id/action_backup"
+        android:title="@string/settings_backup_now"
+        app:showAsAction="never" />
+
+    <item
+        android:id="@+id/action_restore"
+        android:title="@string/restore_backup_button"
+        android:visible="false"
+        app:showAsAction="never"
+        tools:visible="true" />
+
+</menu>

app/src/main/res/values/config.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="show_restore_in_settings">true</bool>
+</resources>

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

@@ -23,4 +23,13 @@
     <string name="loading_packages">Loading packages…</string>
     <string name="initializing">Initializing…</string>
 
+    <!-- Settings -->
+    <string name="settings_backup">Backup my data</string>
+    <string name="settings_backup_location">Backup location</string>
+    <string name="settings_backup_external_storage">External Storage</string>
+    <string name="settings_info">All backups are encrypted on your phone. To restore from backup you will need your 12-word recovery code.</string>
+    <string name="settings_auto_restore_title">Automatic restore</string>
+    <string name="settings_auto_restore_summary">When reinstalling an app, restore backed up settings and data</string>
+    <string name="settings_backup_now">Backup now</string>
+
 </resources>

app/src/main/res/values/styles.xml

@@ -1,8 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="android:Theme.Material.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-    </style>
-
 </resources>

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

@@ -0,0 +1,7 @@
+<resources>
+
+    <style name="AppTheme" parent="Theme.AppCompat.DayNight">
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>
+    </style>
+
+</resources>

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

@@ -0,0 +1,32 @@
+<androidx.preference.PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <androidx.preference.SwitchPreferenceCompat
+        app:icon="@drawable/ic_cloud_upload"
+        app:key="backup"
+        app:persistent="false"
+        app:title="@string/settings_backup" />
+
+    <androidx.preference.Preference
+        app:dependency="backup"
+        app:icon="@drawable/ic_storage"
+        app:key="backup_location"
+        app:selectable="false"
+        app:summary="@string/settings_backup_external_storage"
+        app:title="@string/settings_backup_location" />
+
+    <androidx.preference.SwitchPreferenceCompat
+        app:dependency="backup"
+        app:key="auto_restore"
+        app:persistent="false"
+        app:summary="@string/settings_auto_restore_summary"
+        app:title="@string/settings_auto_restore_title" />
+
+    <androidx.preference.Preference
+        app:allowDividerAbove="true"
+        app:allowDividerBelow="false"
+        app:dependency="backup"
+        app:icon="@drawable/ic_info_outline"
+        app:selectable="false"
+        app:summary="@string/settings_info" />
+
+</androidx.preference.PreferenceScreen>