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android - 从 SD 卡共享图像

转载 作者:太空宇宙 更新时间:2023-11-03 13:32:57 26 4
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我尝试了 2 周来寻找如何共享存储在 SD 卡上的图像,但没有成功。

answer对我不起作用,也不是我要找的东西。

我正在使用 Cam Preview 应用程序,它将图像存储到 SD,然后在应用程序内图库中显示它们:

   public class GalleryView extends Activity {  

private static final int SELECT_PICTURE = 1;

private String selectedImagePath;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery_view);

Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this, ReadSDCard()));


g.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE);
}
});
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);

Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, selectedImagePath);
shareIntent.setType("image/*");
startActivity(Intent.createChooser(shareIntent, "Share image"));
}
}
}

public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}

@Override
public void onDestroy() {
super.onDestroy();
}

private List<String> ReadSDCard() {

createDirIfNotExists();

List<String> tFileList = new ArrayList<String>();

//It have to be matched with the directory in SDCard
File f = new File("/sdcard/Cam App");

File[] files=f.listFiles();

for(int i=0; i<files.length; i++) {
File file = files[i];
/*It's assumed that all file in the path are in supported type*/
tFileList.add(file.getPath());
}

return tFileList;
}

class ViewHolder {
ImageView i;
}

public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private List<String> FileList;
LayoutInflater inflater = getLayoutInflater();
ViewHolder holder;

public ImageAdapter(Context c, List<String> fList) {
mContext = c;
FileList = fList;
TypedArray a = obtainStyledAttributes(R.styleable.GalleryTheme);
mGalleryItemBackground = a.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0);
a.recycle();
}

public int getCount() {
return FileList.size();
}

public Object getItem(int position) {
return position;
}

public long getItemId(int position) {
return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);

Bitmap bm = BitmapFactory.decodeFile(FileList.get(position).toString());
i.setImageBitmap(bm);

if (convertView == null) {
convertView = inflater.inflate(R.layout.gallery_item, parent, false);

holder = new ViewHolder();
holder.i = ((ImageView) convertView.findViewById(R.id.imagenGallery));

convertView.setTag(holder);
}
holder.i.setScaleType(ImageView.ScaleType.FIT_XY);
holder.i.setBackgroundResource(mGalleryItemBackground);

return i;
}
}

public TypedArray obtainStyledAttributes(int theme) {
// TODO Auto-generated method stub
return null;
}
}

画廊工作正常,但我不知道如何分享保存在 SD 上的图像。

如何访问Cam App 文件夹 中的图像并共享画廊中当时出现的图像?

我尝试使用位置,但它只适用于固定图像。任何帮助/提示将不胜感激。

最佳答案

好吧,我终于找到了解决办法,但这并不是我想要的:

g.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setDataAndType(Uri.parse("file://" + "/sdcard/Cam App"), "image/*");
startActivityForResult(Intent.createChooser(intent, "Select image to share:"), SELECT_PICTURE);
}
});
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
//OI FILE Manager
filemanagerstring = selectedImageUri.getPath();

//MEDIA GALLERY
selectedImagePath = getPath(selectedImageUri);

//NOW WE HAVE OUR WANTED STRING
if(selectedImagePath!=null)
System.out.println("selectedImagePath is the right one for you!");
else
System.out.println("filemanagerstring is the right one for you!");

Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, selectedImageUri);
shareIntent.setType("image/*");
startActivity(Intent.createChooser(shareIntent, "Share image via:"));
}
}
}

@SuppressWarnings("deprecation")
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
if(cursor!=null) {
//HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
//THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
else return null;
}

如果有人有更好的解决方案,请分享。

关于android - 从 SD 卡共享图像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10795630/

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