src/com/android/settings/bluetooth/QrCodeScanModeFragment.java - platform/packages/apps/Settings - Git at Google

 /**
  * Copyright (C) 2022 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.settings.bluetooth;

 import android.app.settings.SettingsEnums;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.graphics.Matrix;
 import android.graphics.Outline;
 import android.graphics.Rect;
 import android.graphics.SurfaceTexture;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.VibrationEffect;
 import android.os.Vibrator;
 import android.util.Log;
 import android.util.Size;
 import android.view.LayoutInflater;
 import android.view.TextureView;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewOutlineProvider;
 import android.view.accessibility.AccessibilityEvent;
 import android.widget.TextView;

 import androidx.annotation.NonNull;
 import androidx.annotation.StringRes;

 import com.android.settings.core.InstrumentedFragment;
 import com.android.settingslib.R;
 import com.android.settingslib.bluetooth.BluetoothBroadcastUtils;
 import com.android.settingslib.bluetooth.BluetoothUtils;
 import com.android.settingslib.qrcode.QrCamera;

 import java.time.Duration;

 public class QrCodeScanModeFragment extends InstrumentedFragment implements
         TextureView.SurfaceTextureListener,
         QrCamera.ScannerCallback {
     private static final boolean DEBUG = BluetoothUtils.D;
     private static final String TAG = "QrCodeScanModeFragment";

     /** Message sent to hide error message */
     private static final int MESSAGE_HIDE_ERROR_MESSAGE = 1;
     /** Message sent to show error message */
     private static final int MESSAGE_SHOW_ERROR_MESSAGE = 2;
     /** Message sent to broadcast QR code */
     private static final int MESSAGE_SCAN_BROADCAST_SUCCESS = 3;

     private static final long SHOW_ERROR_MESSAGE_INTERVAL = 10000;
     private static final long SHOW_SUCCESS_SQUARE_INTERVAL = 1000;

     private static final Duration VIBRATE_DURATION_QR_CODE_RECOGNITION = Duration.ofMillis(3);

     private boolean mIsGroupOp;
     private int mCornerRadius;
     private BluetoothDevice mSink;
     private String mBroadcastMetadata;
     private Context mContext;
     private QrCamera mCamera;
     private QrCodeScanModeController mController;
     private TextureView mTextureView;
     private TextView mSummary;
     private TextView mErrorMessage;

     public QrCodeScanModeFragment(boolean isGroupOp, BluetoothDevice sink) {
         mIsGroupOp = isGroupOp;
         mSink = sink;
     }

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mContext = getContext();
         mController = new QrCodeScanModeController(mContext);
     }

     @Override
     public final View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         return inflater.inflate(R.layout.qrcode_scanner_fragment, container,
                 /* attachToRoot */ false);
     }

     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         mTextureView = view.findViewById(R.id.preview_view);
         mCornerRadius = mContext.getResources().getDimensionPixelSize(
                 R.dimen.qrcode_preview_radius);
         mTextureView.setSurfaceTextureListener(this);
         mTextureView.setOutlineProvider(new ViewOutlineProvider() {
             @Override
             public void getOutline(View view, Outline outline) {
                 outline.setRoundRect(0,0, view.getWidth(), view.getHeight(), mCornerRadius);
             }
         });
         mTextureView.setClipToOutline(true);
         mErrorMessage = view.findViewById(R.id.error_message);
     }

     private void initCamera(SurfaceTexture surface) {
         // Check if the camera has already created.
         if (mCamera == null) {
             mCamera = new QrCamera(mContext, this);
             mCamera.start(surface);
         }
     }

     private void destroyCamera() {
         if (mCamera != null) {
             mCamera.stop();
             mCamera = null;
         }
     }

     @Override
     public void onSurfaceTextureAvailable(@NonNull SurfaceTexture surface, int width, int height) {
         initCamera(surface);
     }

     @Override
     public void onSurfaceTextureSizeChanged(@NonNull SurfaceTexture surface, int width,
             int height) {
     }

     @Override
     public boolean onSurfaceTextureDestroyed(@NonNull SurfaceTexture surface) {
         destroyCamera();
         return true;
     }

     @Override
     public void onSurfaceTextureUpdated(@NonNull SurfaceTexture surface) {
     }

     @Override
     public void handleSuccessfulResult(String qrCode) {
         if (DEBUG) {
             Log.d(TAG, "handleSuccessfulResult(), get the qr code string.");
         }
         mBroadcastMetadata = qrCode;
         handleBtLeAudioScanner();
     }

     @Override
     public void handleCameraFailure() {
         destroyCamera();
     }

     @Override
     public Size getViewSize() {
         return new Size(mTextureView.getWidth(), mTextureView.getHeight());
     }

     @Override
     public Rect getFramePosition(Size previewSize, int cameraOrientation) {
         return new Rect(0, 0, previewSize.getHeight(), previewSize.getHeight());
     }

     @Override
     public void setTransform(Matrix transform) {
         mTextureView.setTransform(transform);
     }

     @Override
     public boolean isValid(String qrCode) {
         if (qrCode.startsWith(BluetoothBroadcastUtils.SCHEME_BT_BROADCAST_METADATA)) {
             return true;
         } else {
             showErrorMessage(R.string.bt_le_audio_qr_code_is_not_valid_format);
             return false;
         }
     }

     protected boolean isDecodeTaskAlive() {
         return mCamera != null && mCamera.isDecodeTaskAlive();
     }

     private final Handler mHandler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
                 case MESSAGE_HIDE_ERROR_MESSAGE:
                     mErrorMessage.setVisibility(View.INVISIBLE);
                     break;

                 case MESSAGE_SHOW_ERROR_MESSAGE:
                     final String errorMessage = (String) msg.obj;

                     mErrorMessage.setVisibility(View.VISIBLE);
                     mErrorMessage.setText(errorMessage);
                     mErrorMessage.sendAccessibilityEvent(
                             AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);

                     // Cancel any pending messages to hide error view and requeue the message so
                     // user has time to see error
                     removeMessages(MESSAGE_HIDE_ERROR_MESSAGE);
                     sendEmptyMessageDelayed(MESSAGE_HIDE_ERROR_MESSAGE,
                             SHOW_ERROR_MESSAGE_INTERVAL);
                     break;

                 case MESSAGE_SCAN_BROADCAST_SUCCESS:
                     /* TODO(b/265281156) : Move the logic to BluetoothFindBroadcastsFragment.
                     *  We only pass the QR code string to the previous page.
                     */
                     mController.addSource(mSink, mBroadcastMetadata, mIsGroupOp);
                     notifyUserForQrCodeRecognition();
                     break;
                 default:
             }
         }
     };

     private void notifyUserForQrCodeRecognition() {
         if (mCamera != null) {
             mCamera.stop();
         }

         mErrorMessage.setVisibility(View.INVISIBLE);

         triggerVibrationForQrCodeRecognition(getContext());

         getActivity().finish();
     }

     private static void triggerVibrationForQrCodeRecognition(Context context) {
         Vibrator vibrator = context.getSystemService(Vibrator.class);
         if (vibrator == null) {
             return;
         }
         vibrator.vibrate(VibrationEffect.createOneShot(
                 VIBRATE_DURATION_QR_CODE_RECOGNITION.toMillis(),
                 VibrationEffect.DEFAULT_AMPLITUDE));
     }

     private void showErrorMessage(@StringRes int messageResId) {
         final Message message = mHandler.obtainMessage(MESSAGE_SHOW_ERROR_MESSAGE,
                 getString(messageResId));
         message.sendToTarget();
     }

     private void handleBtLeAudioScanner() {
         Message message = mHandler.obtainMessage(MESSAGE_SCAN_BROADCAST_SUCCESS);
         mHandler.sendMessageDelayed(message, SHOW_SUCCESS_SQUARE_INTERVAL);
     }

     private void updateSummary() {
         mSummary.setText(getString(R.string.bt_le_audio_scan_qr_code_scanner));
     }

     @Override
     public int getMetricsCategory() {
         return SettingsEnums.LE_AUDIO_BROADCAST_SCAN_QR_CODE;
     }
 }
	/**
	* Copyright (C) 2022 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.settings.bluetooth;

	import android.app.settings.SettingsEnums;
	import android.bluetooth.BluetoothDevice;
	import android.content.Context;
	import android.graphics.Matrix;
	import android.graphics.Outline;
	import android.graphics.Rect;
	import android.graphics.SurfaceTexture;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.Message;
	import android.os.VibrationEffect;
	import android.os.Vibrator;
	import android.util.Log;
	import android.util.Size;
	import android.view.LayoutInflater;
	import android.view.TextureView;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ViewOutlineProvider;
	import android.view.accessibility.AccessibilityEvent;
	import android.widget.TextView;

	import androidx.annotation.NonNull;
	import androidx.annotation.StringRes;

	import com.android.settings.core.InstrumentedFragment;
	import com.android.settingslib.R;
	import com.android.settingslib.bluetooth.BluetoothBroadcastUtils;
	import com.android.settingslib.bluetooth.BluetoothUtils;
	import com.android.settingslib.qrcode.QrCamera;

	import java.time.Duration;

	public class QrCodeScanModeFragment extends InstrumentedFragment implements
	TextureView.SurfaceTextureListener,
	QrCamera.ScannerCallback {
	private static final boolean DEBUG = BluetoothUtils.D;
	private static final String TAG = "QrCodeScanModeFragment";

	/** Message sent to hide error message */
	private static final int MESSAGE_HIDE_ERROR_MESSAGE = 1;
	/** Message sent to show error message */
	private static final int MESSAGE_SHOW_ERROR_MESSAGE = 2;
	/** Message sent to broadcast QR code */
	private static final int MESSAGE_SCAN_BROADCAST_SUCCESS = 3;

	private static final long SHOW_ERROR_MESSAGE_INTERVAL = 10000;
	private static final long SHOW_SUCCESS_SQUARE_INTERVAL = 1000;

	private static final Duration VIBRATE_DURATION_QR_CODE_RECOGNITION = Duration.ofMillis(3);

	private boolean mIsGroupOp;
	private int mCornerRadius;
	private BluetoothDevice mSink;
	private String mBroadcastMetadata;
	private Context mContext;
	private QrCamera mCamera;
	private QrCodeScanModeController mController;
	private TextureView mTextureView;
	private TextView mSummary;
	private TextView mErrorMessage;

	public QrCodeScanModeFragment(boolean isGroupOp, BluetoothDevice sink) {
	mIsGroupOp = isGroupOp;
	mSink = sink;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	mContext = getContext();
	mController = new QrCodeScanModeController(mContext);
	}

	@Override
	public final View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	return inflater.inflate(R.layout.qrcode_scanner_fragment, container,
	/* attachToRoot */ false);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
	mTextureView = view.findViewById(R.id.preview_view);
	mCornerRadius = mContext.getResources().getDimensionPixelSize(
	R.dimen.qrcode_preview_radius);
	mTextureView.setSurfaceTextureListener(this);
	mTextureView.setOutlineProvider(new ViewOutlineProvider() {
	@Override
	public void getOutline(View view, Outline outline) {
	outline.setRoundRect(0,0, view.getWidth(), view.getHeight(), mCornerRadius);
	}
	});
	mTextureView.setClipToOutline(true);
	mErrorMessage = view.findViewById(R.id.error_message);
	}

	private void initCamera(SurfaceTexture surface) {
	// Check if the camera has already created.
	if (mCamera == null) {
	mCamera = new QrCamera(mContext, this);
	mCamera.start(surface);
	}
	}

	private void destroyCamera() {
	if (mCamera != null) {
	mCamera.stop();
	mCamera = null;
	}
	}

	@Override
	public void onSurfaceTextureAvailable(@NonNull SurfaceTexture surface, int width, int height) {
	initCamera(surface);
	}

	@Override
	public void onSurfaceTextureSizeChanged(@NonNull SurfaceTexture surface, int width,
	int height) {
	}

	@Override
	public boolean onSurfaceTextureDestroyed(@NonNull SurfaceTexture surface) {
	destroyCamera();
	return true;
	}

	@Override
	public void onSurfaceTextureUpdated(@NonNull SurfaceTexture surface) {
	}

	@Override
	public void handleSuccessfulResult(String qrCode) {
	if (DEBUG) {
	Log.d(TAG, "handleSuccessfulResult(), get the qr code string.");
	}
	mBroadcastMetadata = qrCode;
	handleBtLeAudioScanner();
	}

	@Override
	public void handleCameraFailure() {
	destroyCamera();
	}

	@Override
	public Size getViewSize() {
	return new Size(mTextureView.getWidth(), mTextureView.getHeight());
	}

	@Override
	public Rect getFramePosition(Size previewSize, int cameraOrientation) {
	return new Rect(0, 0, previewSize.getHeight(), previewSize.getHeight());
	}

	@Override
	public void setTransform(Matrix transform) {
	mTextureView.setTransform(transform);
	}

	@Override
	public boolean isValid(String qrCode) {
	if (qrCode.startsWith(BluetoothBroadcastUtils.SCHEME_BT_BROADCAST_METADATA)) {
	return true;
	} else {
	showErrorMessage(R.string.bt_le_audio_qr_code_is_not_valid_format);
	return false;
	}
	}

	protected boolean isDecodeTaskAlive() {
	return mCamera != null && mCamera.isDecodeTaskAlive();
	}

	private final Handler mHandler = new Handler() {
	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case MESSAGE_HIDE_ERROR_MESSAGE:
	mErrorMessage.setVisibility(View.INVISIBLE);
	break;

	case MESSAGE_SHOW_ERROR_MESSAGE:
	final String errorMessage = (String) msg.obj;

	mErrorMessage.setVisibility(View.VISIBLE);
	mErrorMessage.setText(errorMessage);
	mErrorMessage.sendAccessibilityEvent(
	AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);

	// Cancel any pending messages to hide error view and requeue the message so
	// user has time to see error
	removeMessages(MESSAGE_HIDE_ERROR_MESSAGE);
	sendEmptyMessageDelayed(MESSAGE_HIDE_ERROR_MESSAGE,
	SHOW_ERROR_MESSAGE_INTERVAL);
	break;

	case MESSAGE_SCAN_BROADCAST_SUCCESS:
	/* TODO(b/265281156) : Move the logic to BluetoothFindBroadcastsFragment.
	* We only pass the QR code string to the previous page.
	*/
	mController.addSource(mSink, mBroadcastMetadata, mIsGroupOp);
	notifyUserForQrCodeRecognition();
	break;
	default:
	}
	}
	};

	private void notifyUserForQrCodeRecognition() {
	if (mCamera != null) {
	mCamera.stop();
	}

	mErrorMessage.setVisibility(View.INVISIBLE);

	triggerVibrationForQrCodeRecognition(getContext());

	getActivity().finish();
	}

	private static void triggerVibrationForQrCodeRecognition(Context context) {
	Vibrator vibrator = context.getSystemService(Vibrator.class);
	if (vibrator == null) {
	return;
	}
	vibrator.vibrate(VibrationEffect.createOneShot(
	VIBRATE_DURATION_QR_CODE_RECOGNITION.toMillis(),
	VibrationEffect.DEFAULT_AMPLITUDE));
	}

	private void showErrorMessage(@StringRes int messageResId) {
	final Message message = mHandler.obtainMessage(MESSAGE_SHOW_ERROR_MESSAGE,
	getString(messageResId));
	message.sendToTarget();
	}

	private void handleBtLeAudioScanner() {
	Message message = mHandler.obtainMessage(MESSAGE_SCAN_BROADCAST_SUCCESS);
	mHandler.sendMessageDelayed(message, SHOW_SUCCESS_SQUARE_INTERVAL);
	}

	private void updateSummary() {
	mSummary.setText(getString(R.string.bt_le_audio_scan_qr_code_scanner));
	}

	@Override
	public int getMetricsCategory() {
	return SettingsEnums.LE_AUDIO_BROADCAST_SCAN_QR_CODE;
	}
	}