Extract DatabaseConfig implementation.

briar-android/src/main/java/org/briarproject/briar/android/AndroidDatabaseConfig.java

+package org.briarproject.briar.android;
+
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.io.File;
+
+import javax.annotation.Nullable;
+
+@NotNullByDefault
+class AndroidDatabaseConfig implements DatabaseConfig {
+
+	private final File dir;
+
+	@Nullable
+	private volatile SecretKey key = null;
+	@Nullable
+	private volatile String nickname = null;
+
+	AndroidDatabaseConfig(File dir) {
+		this.dir = dir;
+	}
+
+	@Override
+	public boolean databaseExists() {
+		// FIXME should not run on UiThread #620
+		if (!dir.isDirectory()) return false;
+		File[] files = dir.listFiles();
+		return files != null && files.length > 0;
+	}
+
+	@Override
+	public File getDatabaseDirectory() {
+		return dir;
+	}
+
+	@Override
+	public void setEncryptionKey(SecretKey key) {
+		this.key = key;
+	}
+
+	@Override
+	public void setLocalAuthorName(String nickname) {
+		this.nickname = nickname;
+	}
+
+	@Override
+	@Nullable
+	public String getLocalAuthorName() {
+		return nickname;
+	}
+
+	@Override
+	@Nullable
+	public SecretKey getEncryptionKey() {
+		return key;
+	}
+
+	@Override
+	public long getMaxSize() {
+		return Long.MAX_VALUE;
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/AppModule.java

@@ -5,7 +5,6 @@ import android.content.SharedPreferences;
 
 import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.PublicKey;
-import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
@@ -23,7 +22,6 @@ import org.briarproject.briar.api.android.ScreenFilterMonitor;
 import java.io.File;
 import java.security.GeneralSecurityException;
 
-import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
@@ -87,51 +85,7 @@ public class AppModule {
 		File dir = app.getApplicationContext().getDir("db", MODE_PRIVATE);
 		@MethodsNotNullByDefault
 		@ParametersNotNullByDefault
-		DatabaseConfig databaseConfig = new DatabaseConfig() {
-
-			private volatile SecretKey key;
-			private volatile String nickname;
-
-			@Override
-			public boolean databaseExists() {
-				// FIXME should not run on UiThread #620
-				if (!dir.isDirectory()) return false;
-				File[] files = dir.listFiles();
-				return files != null && files.length > 0;
-			}
-
-			@Override
-			public File getDatabaseDirectory() {
-				return dir;
-			}
-
-			@Override
-			public void setEncryptionKey(SecretKey key) {
-				this.key = key;
-			}
-
-			@Override
-			public void setLocalAuthorName(String nickname) {
-				this.nickname = nickname;
-			}
-
-			@Override
-			@Nullable
-			public String getLocalAuthorName() {
-				return nickname;
-			}
-
-			@Override
-			@Nullable
-			public SecretKey getEncryptionKey() {
-				return key;
-			}
-
-			@Override
-			public long getMaxSize() {
-				return Long.MAX_VALUE;
-			}
-		};
+		DatabaseConfig databaseConfig = new AndroidDatabaseConfig(dir);
 		return databaseConfig;
 	}
 
@@ -204,4 +158,5 @@ public class AppModule {
 		lifecycleManager.registerService(dozeWatchdog);
 		return dozeWatchdog;
 	}
+
 }