Question

我正在尝试从应用程序内部访问相机。我有以下代码，并且所有程序都在工作，除了它没有给用户授予权限的选项。不太确定出了什么问题。

public void takePicture（视图）{

    if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
    {
       //requestPermissions(new String[]{Manifest.permission.CAMERA}, MY_CAMERA_PERMISSION_CODE);
        ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.CAMERA}, MY_CAMERA_PERMISSION_CODE);

    }
    else
    {
        Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(cameraIntent, CAMERA_REQUEST);
    }


}

public void saveButton (View view) {
    Log.i("info", "stuff");
}

public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
{
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == MY_CAMERA_PERMISSION_CODE)
    {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED)
        {
            Toast.makeText(this, "camera permission granted", Toast.LENGTH_LONG).show();
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_REQUEST);
        }
        else
        {
            Toast.makeText(this, "camera permission denied", Toast.LENGTH_LONG).show();
        }
    }
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        imageView.setImageBitmap(photo);
    }
}

单击按钮后，吐司会显示是否尚未授予权限，但首先没有选择授予权限的选项？

Answer 1

请确保您已在Androidmanifeast.xml中添加了摄像头权限代码中的细微变化替换为以下行

if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)

使用

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)

要求相机许可

1 个答案: