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