Android camera 篇之视频录制

本文是camera系列文章第一篇，预计三篇 ：一 拍照；二 视频；三 自定义相机
相机功能是我们最常用的，属于andorid基础能力。本文讲述一下Android如何调用相机进行录制视频。

流程

获取权限

唤醒相机

录视频并播放

一、获取权限

 /**
     * 所需权限数组 相机 读 写
     */
    private String[] permissions = new String[]{"android.permission.CAMERA",
            "android.permission.READ_EXTERNAL_STORAGE",
            "android.permission.WRITE_EXTERNAL_STORAGE"};
    private int takeCameraCode = 1001; // 获取全尺寸图
    private int cameraCode = 10000;  // 权限请求码



 /**
     * 申请权限
     */
    private void requestPermission() {
        ActivityCompat.requestPermissions(this,permissions,cameraCode);
    }

    /**
     * 权限处理
     * @param requestCode
     * @param permissions
     * @param grantResults
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        /**
         * 权限处理
         */
        if (requestCode == cameraCode) {
            for (int i = 0; i < grantResults.length; i++) {
                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
                    requestPermission();
                    return;
                }
            }
            openCamera();
        }
    }

二、唤醒相机

 

 /**
     * 唤醒系统相机
     */
    private void openCamera() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(intent,takeCameraCode);
        }
    }

三、获取视频并播放

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == takeCameraCode && resultCode == RESULT_OK && data != null) {
            Uri videoUri = data.getData();
            video.setVideoURI(videoUri);
            video.start();
            video.requestFocus();
        }
    }

本文对视频不做处理。camera写完之后，会准备写一些音视频处理的文章。

完整代码如下：

public class VideoCameraActivity extends AppCompatActivity {
    /**
     * 所需权限数组 相机 读 写
     */
    private String[] permissions = new String[]{"android.permission.CAMERA",
            "android.permission.READ_EXTERNAL_STORAGE",
            "android.permission.WRITE_EXTERNAL_STORAGE"};
    private int takeCameraCode = 1001; // 获取全尺寸图
    private int cameraCode = 10000;  // 权限请求码
    private VideoView video;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video_camera);
        video = findViewById(R.id.video);
        findViewById(R.id.open_camera).setOnClickListener(v -> {
            requestPermission();
        });
    }

    /**
     * 申请权限
     */
    private void requestPermission() {
        ActivityCompat.requestPermissions(this,permissions,cameraCode);
    }

    /**
     * 权限处理
     * @param requestCode
     * @param permissions
     * @param grantResults
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        /**
         * 权限处理
         */
        if (requestCode == cameraCode) {
            for (int i = 0; i < grantResults.length; i++) {
                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
                    requestPermission();
                    return;
                }
            }
            openCamera();
        }
    }
    /**
     * 唤醒系统相机
     */
    private void openCamera() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(intent,takeCameraCode);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == takeCameraCode && resultCode == RESULT_OK && data != null) {
            Uri videoUri = data.getData();
            video.setVideoURI(videoUri);
            video.start();
            video.requestFocus();
        }
    }
}

 

本文完，欢迎评论。

本文地址：https://blog.csdn.net/Naide_S/article/details/108122611