Question

我正在创建一个应用程序，可以选择从相机或图库中获取图像并将其显示在ImageView中。我从Android Developers Tutorial.得到了这个我正在使用DialogInterface：

private void selectImage() {
        final CharSequence[] items = { "Take Photo", "Choose from Library",
                "Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(ReportIncident.this);
        builder.setTitle("Add Picture");
        builder.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {
                if (items[item].equals("Take Photo")) {
                    takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    // Ensure that there's a camera activity to handle the intent

                    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
                        // Create the File where the photo should go

                        try {
                            photoFile = createImageFile();
                            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));

                            startActivityForResult(takePictureIntent, 0);


                        } catch (IOException ex) {
                            // Error occurred while creating the File
                            ex.printStackTrace();
                        }

                    }
                } else if (items[item].equals("Choose from Library")) {
                    Intent intent = new Intent(
                            Intent.ACTION_PICK,
                            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    intent.setType("image/*");
                    startActivityForResult(
                            Intent.createChooser(intent, "Select File"), 1);
                } else if (items[item].equals("Cancel")) {
                    dialog.dismiss();
                }
            }
        });
        builder.show();
    }

createImageFile创建将保存照片的目录/文件：

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "FIREFLOOD_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;
}

“从图书馆中选择”部分已经有效，但我对“拍照”部分有疑问。特别是在这一行：

takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
galleryAddPic();
startActivityForResult(takePictureIntent, 0);

在startActivityOnResult（）之前使用putExtra（）和galleryAddPic（）在拍摄照片后崩溃应用程序但成功保存图像画廊。但是从代码中删除这两种方法会显示拍摄的照片到ImageView reportImage。

startActivityForResult显示通过activityOnResult拍摄到ImageView的图像：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == 1) {

                onSelectFromGalleryResult(data);
            }else if (requestCode == 0) {
                Bundle extras = data.getExtras();
                Bitmap imageBitmap = (Bitmap) extras.get("data");
                reportImage.setImageBitmap(imageBitmap);




            }
        }
    }

将图像保存到图库是由galleryAddPic：

执行的

private void galleryAddPic() {

        Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        File f = new File(mCurrentPhotoPath);
        Uri contentUri = Uri.fromFile(f);
        mediaScanIntent.setData(contentUri);
        this.sendBroadcast(mediaScanIntent);
    }

问题是我在哪里可以放这两种方法（putExtra和   galleryAddPic）使这两个功能有效：


显示拍摄到ImageView的照片

同时将照片保存到图库。

我不能完全做这两件事。请帮忙。我试着把   onAcitivityResult上的putExtra和galleryAddPic但它仍然存在   崩溃。如果没有putExtra，galleryAddPic将无效。

Answer 1

本教程将帮助您尝试此链接 http://www.androidhive.info/2013/09/android-working-with-camera-api/

Android：使用相机将图像显示到ImageView并保存到图库

1 个答案: