Question

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>

Answer 1

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

android：在gridview中显示捕获图像的问题

1 个答案: