你弄啥嘞 2016-12-25 12:58 采纳率: 0%
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android开发:如何获取非sd卡里的图片

在android开发分享功能的时候遇到图片的位置在system/media/image/里面,或者给了content://com.zhihu.android.provider.image…这样的uri时,无法获取图片路径,请问各位大神有知道如何解决的吗?

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  • 玄冰罡气 2016-12-26 09:14
    关注

    试试这个工具类。
    public class FileHelper {
    public static String getRealPath(Uri uri, Activity mActivity) {
    String realPath = null;

        if (Build.VERSION.SDK_INT < 11)
            realPath = FileHelper.getRealPathFromURI_BelowAPI11(mActivity, uri);
    
            // SDK >= 11
        else
            realPath = FileHelper.getRealPathFromURI_API11_And_Above(mActivity, uri);
    
        return realPath;
    }
    
    public static String getRealPath(String uriString, Activity mActivity) {
        return FileHelper.getRealPath(Uri.parse(uriString), mActivity);
    }
    
    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API11_And_Above(final Context context, final Uri uri) {
    
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
    
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
    
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
    
                // TODO handle non-primary volumes
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
    
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
    
                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
    
                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
    
                final String selection = "_id=?";
                final String[] selectionArgs = new String[]{
                        split[1]
                };
    
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
    
            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();
    
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
    
        return null;
    }
    
    public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri) {
        String[] proj = {MediaStore.Images.Media.DATA};
        String result = null;
    
        try {
            Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            result = cursor.getString(column_index);
    
        } catch (Exception e) {
            result = null;
        }
        return result;
    }
    
    
    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {
    
        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };
    
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
    
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } catch (Exception e) {
            return null;
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }
    
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }
    
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }
    
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
    
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }
    

    }

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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