如何强制用户通过摄像头( intent camera)拍摄图像，或者如何禁用intent camera back按钮？

<uses-permission android:name="android.permission.CAMERA" />

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST_CODE);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        // 处理拍摄的照片
    }
}

public class CameraActivity extends AppCompatActivity {
    @Override
    public void onBackPressed() {
        // 禁用返回按钮
    }
}

Intent cameraIntent = new Intent(this, CameraActivity.class);
startActivityForResult(cameraIntent, CAMERA_REQUEST_CODE);