android开发 预览 exce exceptio stat open rri 采集视频
本文主要将的是:使用 Camera API 采集视频数据并保存到文件,分别使用 SurfaceView、TextureView 来预览 Camera 数据,取到 NV21 的数据回调。
注: 需要权限:<uses-permission android:name="android.permission.CAMERA" />
做过Android开发的人一般都知道,有两种方法能够做到这一点:SurfaceView、TextureView。
下面是使用SurfaceView预览数据的方式:
- SurfaceView surfaceView;
- Camera camera;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- surfaceView = (SurfaceView) findViewById(R.id.surface_view);
- surfaceView.getHolder().addCallback(this);
- // 打开摄像头并将展示方向旋转90度
- camera = Camera.open();
- camera.setDisplayOrientation(90);
- }
- //------ Surface 预览 -------
- @Override
- public void surfaceCreated(SurfaceHolder surfaceHolder) {
- try {
- camera.setPreviewDisplay(surfaceHolder);
- camera.startPreview();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- @Override
- public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int w, int h) {
- }
- @Override
- public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
- camera.release();
- }
下面是使用TextureView预览数据的方式:
- TextureView textureView;
- Camera camera;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- textureView = (TextureView) findViewById(R.id.texture_view);
- textureView.setSurfaceTextureListener(this);// 打开摄像头并将展示方向旋转90度
- camera = Camera.open();
- camera.setDisplayOrientation(90);
- }
- //------ Texture 预览 -------
- @Override
- public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
- try {
- camera.setPreviewTexture(surfaceTexture);
- camera.startPreview();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- @Override
- public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {
- }
- @Override
- public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
- camera.release();
- return false;
- }
- @Override
- public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
- }
Android 音视频开发(四):使用 Camera API 采集视频数据
来源: http://www.bubuko.com/infodetail-2291695.html