SurfaceView 绘制会有独立窗口, TextureView 没有独立的窗口,可以像普通的 View 一样,更高效更方便
public class MainActivity extends AppCompatActivity { private TextureView textureView; private String TAG = "测试"; private HandlerThread mThreadHandler; private Handler mHandler; private CaptureRequest.Builder mPreviewBuilder; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mThreadHandler = new HandlerThread("CAMERA2"); mThreadHandler.start(); mHandler = new Handler(mThreadHandler.getLooper()); textureView = (TextureView) findViewById(R.id.tv); textureView.setSurfaceTextureListener(textureListener); } private TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() { @TargetApi(Build.VERSION_CODES.LOLLIPOP) @Override public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) { Log.e(TAG, "可用"); //CameraManaer 摄像头管理器,用于检测摄像头,打开系统摄像头 CameraManager cameraManager = (CameraManager) getSystemService(CAMERA_SERVICE); try { String[] CameraIdList = cameraManager.getCameraIdList();//获取可用相机列表 Log.e(TAG, "可用相机的个数是:" + CameraIdList.length); CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(CameraIdList[0]);//获取某个相机(摄像头特性) cameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);//检查支持 if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } cameraManager.openCamera(CameraIdList[0], mCameraDeviceStateCallback, mHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) { Log.e(TAG,"改变"); } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) { Log.e(TAG,"释放"); return false; } @Override public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) { Log.e(TAG,"更新"); } }; //CameraDeviceandroid.hardware.Camera也就是Camera1的Camera private CameraDevice.StateCallback mCameraDeviceStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(CameraDevice camera) { try { startPreview(camera); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onDisconnected(CameraDevice camera) { } @Override public void onError(CameraDevice camera, int error) { } }; /** * @param camera * @throws CameraAccessException * 开始预览 */ private void startPreview(CameraDevice camera) throws CameraAccessException { SurfaceTexture texture = textureView.getSurfaceTexture(); texture.setDefaultBufferSize(textureView.getWidth(), textureView.getHeight()); Surface surface = new Surface(texture); try { //CameraRequest表示一次捕获请求,用来对z照片的各种参数设置,比如对焦模式、曝光模式等。CameraRequest.Builder用来生成CameraRequest对象 mPreviewBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); } catch (CameraAccessException e) { e.printStackTrace(); } mPreviewBuilder.addTarget(surface); camera.createCaptureSession(Arrays.asList(surface), mSessionStateCallback, mHandler); } //CameraCaptureSession 这个对象控制摄像头的预览或者拍照 //setRepeatingRequest()开启预览,capture()拍照 //StateCallback监听CameraCaptureSession的创建 private CameraCaptureSession.StateCallback mSessionStateCallback = new CameraCaptureSession.StateCallback() { @Override public void onConfigured(CameraCaptureSession session) { Log.e(TAG,"相机创建成功!"); try { session.capture(mPreviewBuilder.build(), mSessionCaptureCallback, mHandler);//拍照 session.setRepeatingRequest(mPreviewBuilder.build(), mSessionCaptureCallback, mHandler);//返回结果 } catch (CameraAccessException e) { e.printStackTrace(); Log.e(TAG,"这里异常"); } } @Override public void onConfigureFailed(CameraCaptureSession session) { Log.e(TAG,"相机创建失败!"); } }; //CameraCaptureSession.CaptureCallback监听拍照过程 private CameraCaptureSession.CaptureCallback mSessionCaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) { Log.e(TAG,"这里接受到数据"+result.toString()); } @Override public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request, CaptureResult partialResult){ }}; }
<LinearLayout 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" android:layout_width="match_parent" android:id="@+id/line1" android:layout_height="match_parent" tools:context=".MainActivity"> <TextureView android:id="@+id/tv" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
<uses-permission android:name="android.permission.CAMERA" /><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.RECORD_AUDIO" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
来源:https://www.cnblogs.com/Ocean123123/p/10980381.html