1

我是安卓新手。现在,我正在使用以下方法进行图像捕获功能:

Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );

问题是我拍摄照片后,新拍摄的照片不会显示在图像显示页面上。

这里有谁知道哪里有代码可以帮助我刷新我的 android 或我需要执行的任何步骤,以便在我拍摄新照片后可以更新我的图像显示页面?

任何帮助将不胜感激,并首先感谢您。

更新的答案:我用这个,可能这可以帮助别人:

                mScanner = new MediaScannerConnection(
                Camera.this,
                new MediaScannerConnection.MediaScannerConnectionClient() {
                    public void onMediaScannerConnected() {
                        mScanner.scanFile(outputFileUri.getPath(), null /* mimeType */);
                    }

                    public void onScanCompleted(String path, Uri uri) {
                        //we can use the uri, to get the newly added image, but it will return path to full sized image
                        //e.g. content://media/external/images/media/7
                        //we can also update this path by replacing media by thumbnail to get the thumbnail
                        //because thumbnail path would be like content://media/external/images/thumbnail/7
                        //But the thumbnail is created after some delay by Android OS
                        //So you may not get the thumbnail. This is why I started new UI thread
                        //and it'll only run after the current thread completed.
                        if (path.equals(outputFileUri.getPath())) {
                            mScanner.disconnect();
                            //we need to create new UI thread because, we can't update our mail thread from here
                            //Both the thread will run one by one, see documentation of android  
                            Camera.this
                            .runOnUiThread(new Runnable() {
                                public void run() {

                                }
                            });
                        }
                    }
                });
        mScanner.connect();
4

3 回答 3

4

莎莉,你的意思是当你拍完照片后,当你查看你知道文件所在的目录时,你在画廊或文件管理器中看不到它?

如果是这样,您需要像这样运行媒体扫描仪:

sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));

...其中 uri 是照片的 uri,因为您已经知道了,尽管如果这样更容易,您可以使用目录的 uri(虽然它更慢 - 如果目录包含许多文件或嵌套目录,可能会非常慢) .

于 2012-04-22T10:59:42.797 回答
1

您应该使用以下代码拍照::

Calendar cal = Calendar.getInstance();
File file = new File(Environment.getExternalStorageDirectory(),(cal.getTimeInMillis()+".jpg"));
if(!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
selectedImageUri = Uri.fromFile(file);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, selectedImageUri);
startActivityForResult(i, CAMERA_RESULT);

在活动结果上,您可以使用这些代码:::

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case CAMERA_RESULT:
if (resultCode == RESULT_OK) {
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), selectedImageUri);
imageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
}
}
}
于 2012-04-22T10:28:52.003 回答
0

您可以通过以下方式刷新您的活动:

Intent myIntent = getIntent();
finish();
startActivity(myIntent);
于 2012-04-22T10:29:42.503 回答