美好的一天
当我按下按钮时，我试图用相机拍摄图像，然后将其保存在Sqllite中，然后在gridview中显示它。 但是在我捕获图像后它没有出现在网格视图中：/ logcat中没有出现错误，除了gridview中没有显示任何内容我不知道相机或网格视图中的问题 有人可以帮忙吗？
这是我的代码
public class CameraFragment extends Fragment {
public static final int MEDIA_TYPE_IMAGE = 1;
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
private static final String IMAGE_DIRECTORY_NAME = "Myfiles";// directory name to store captured images
private static String mCurrentPhotoPath; // file path to the last image captured
View view;
private Uri fileUri;// file url to store image
private GridView myGridView;
private ImageListAdapter adapter;
private List<Images> myLists;// image list
Images images;
DatabaseAdapter DBadapter;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null)
parent.removeView(view);
}
try {
// Inflate the layout for this fragment
view = inflater
.inflate(R.layout.fragment_camera, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
e.printStackTrace();
}
if (view != null)
init();
return view;
}
// initialize all the variables
private void init() {
DatabaseAdapter DBadapter =new DatabaseAdapter(getActivity());
DBadapter.open();
myLists = new ArrayList<Images>();
myLists=DBadapter.getImagesList();
adapter = new ImageListAdapter(getActivity(), R.layout.img_list_view, myLists);
// imageView = (ImageView) view.findViewById(R.id.imageListView);
Button myButton = (Button) view.findViewById(R.id.camerabutton);
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);// create a file to save the image
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE); // start the image capture Intent
}
});
myGridView = (GridView) view.findViewById(R.id.gridView);
myGridView.setAdapter(adapter);
/**
* Create a file Uri for saving an image or video
*/
public Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
/**
* returning image /
*/
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), IMAGE_DIRECTORY_NAME);
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
mediaStorageDir.mkdirs();
Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create "
+ IMAGE_DIRECTORY_NAME + " directory");
//return null;
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else {
return null;
}
return mediaFile;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1:
if (resultCode == Activity.RESULT_OK) {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getActivity().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
//file path of captured image
String filePath = cursor.getString(columnIndex);
//file path of captured image
File f = new File(filePath);
String filename = f.getName();
cursor.close();
DBadapter.insertImage(images); //insaert image to database
myLists=DBadapter.getImagesList();
adapter = new ImageListAdapter(getActivity(), R.layout.img_list_view, myLists);
myGridView.setAdapter(adapter);
myGridView.invalidateViews();
break;
}
case 2:
if (resultCode == getActivity().RESULT_CANCELED) {
// user cancelled Image capture
Toast.makeText(getActivity(), "User cancelled image capture", Toast.LENGTH_SHORT)
.show();
}
else {
// failed to capture image
Toast.makeText(getActivity(), "Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show();
} break;
}}
}
这里是xml：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.labon.invoicemanger.CameraFragment">
<!-- TODO: Update blank fragment layout --> <RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="My Invoice"
android:layout_gravity="center"
android:layout_margin="20dp"
android:id="@+id/textView16"
android:textColor="@color/colorPrimary"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<GridView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/gridView"
android:layout_above="@+id/camerabutton"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:numColumns="auto_fit"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add New Invoice"
android:textSize="18dp"
android:textStyle="bold"
android:textColor="@android:color/white"
android:id="@+id/camerabutton"
android:drawableRight="@drawable/screenshot"
android:background="@color/colorAccent"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<!--android:drawableRight="@drawable/screen_shot"--> </RelativeLayout> </FrameLayout>
答案 0 :(得分：0)
在startActivityForResult中，您使用CAMERA_CAPTURE_IMAGE_REQUEST_CODE作为请求代码，但在onActivityResult中，您没有CAMERA_CAPTURE_IMAGE_REQUEST_CODE (100)的案例。
您需要在切换案例中为CAMERA_CAPTURE_IMAGE_REQUEST_CODE添加案例或更改：
case 1
带
case CAMERA_CAPTURE_IMAGE_REQUEST_CODE
更新：
试试这个：
static final int REQUEST_IMAGE_CAPTURE = 1;
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(imageBitmap);
}
}
了解更多信息 here