UdfpsController: Ensure node is writeable before proceeding (73673c01) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java

+21 −5

Original line number	Diff line number	Diff line
		@@ -118,6 +118,7 @@ import kotlin.Unit;
		import kotlinx.coroutines.CoroutineScope;
		import kotlinx.coroutines.ExperimentalCoroutinesApi;

		import java.io.File;
		import java.io.FileWriter;
		import java.io.IOException;
		import java.io.PrintWriter;
		@@ -251,15 +252,30 @@ public class UdfpsController implements DozeReceiver, Dumpable {

		private void writeToUdfpsNode(String path, String value) {
		mBiometricExecutor.execute(() -> {
		if (isFileWritable(path)) {
		try (FileWriter writer = new FileWriter(path)) {
		writer.write(value);
		Log.d(TAG, "Successfully set " + path + " to " + value);
		} catch (IOException e) {
		Log.e(TAG, "Failed to write to " + path, e);
		}
		}
		});
		}

		private boolean isFileWritable(String path) {
		File file = new File(path);
		if (!file.exists()) {
		Log.e(TAG, "File does not exist: " + path);
		return false;
		}
		if (!file.canWrite()) {
		Log.e(TAG, "File is not writable: " + path);
		return false;
		}
		return true;
		}

		@VisibleForTesting
		public static final VibrationAttributes UDFPS_VIBRATION_ATTRIBUTES =
		new VibrationAttributes.Builder()