我正在为android平台编写相机应用程序。我正在使用CameraKitView库生成我的相机视图。除实际捕获和保存图像外，包括访问相机在内的所有其他操作均按预期工作。最小sdk为15，目标sdk和编译sdk为28。保存图像的代码如下所示
public class Start extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback {
/**
set a bunch of variables to be used in all activities
**/
public static ...
public static ... ...
public static int MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 0;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wait); //this is a view with a progress bar
checkPermission();
}
private void permissionsGranted() {
/**
do some stuff at startup, like creating some directories if not already present
**/
launchIntent(this, Home.class); //launch the home screen after initializing all variables and creating directories
finish();
}
private void checkPermission() {
if (ContextCompat.checkSelfPermission(Start.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
// do this if permisisons have not yet been granted
Log.d("permission", "NOT granted");
ActivityCompat.requestPermissions(Start.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
}else{
// if the permissions have already been granted do the following
Log.d("permission", "granted");
permissionsGranted();
}
}
// this is required when ActivityCompat.requestPermissions() is called
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// if permissions have been granted, do the following
permissionsGranted();
} else {
// possibly prompt why permissions are required and try again
}
return;
}
// other 'case' lines to check for other
// permissions this app might request.
}
}
}
预先感谢您的协助