Android 根据Uri获取图片绝对路径

一般我们通过Android系统获取图片的时候返回的intent中会带有图片的路径,但是这个路径却不是一个可以直接使用的路径,而是经过了系统的包装过后的路径,类型称之为Uri.

想拿到能使用的绝对路径,就需要一番转换了

示例代码如下:

//跳转代码
Intent intent;
intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(intent, 0);

//然后就等待返回的结果
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 0 && resultCode == RESULT_OK) {
       Uri uri =  data.getData();
        //这里要开始解析了啊

    }

}

上面已经拿到Uri了这里要开始解析了

这里解析要注意一些版本上的差异,区分出来

 public static String getPathFromUri (Context context, Uri uri) {
        String path = null;
        if (uri != null) {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                path = getImageAbsolutePath(context, uri);
            } else {
                Cursor cursor = null;
                try {
                    String[] proj = {MediaStore.Images.Media.DATA};
                    cursor = context.getContentResolver().query(uri, proj, null, null, null);
                    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                    cursor.moveToFirst();
                    path = cursor.getString(column_index);
                } catch (Exception e) {
                } finally {
                    if (cursor != null)
                        cursor.close();
                }
            }

        }
        return path;
    }

较高的版本需要做特殊的处理:

 @TargetApi (19)
    public static String getImageAbsolutePath (Context context, Uri imageUri) {
        if (context == null || imageUri == null)
            return null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
            if (isExternalStorageDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                String type = split[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            } else if (isDownloadsDocument(imageUri)) {
                String id = DocumentsContract.getDocumentId(imageUri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);
            } else if (isMediaDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                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;
                }
                String selection = MediaStore.Images.Media._ID + "=?";
                String[] selectionArgs = new String[]{split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        } // MediaStore (and general)
        else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
            // Return the remote address
            if (isGooglePhotosUri(imageUri))
                return imageUri.getLastPathSegment();
            return getDataColumn(context, imageUri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
            return imageUri.getPath();
        }
        return null;
    }

然后在适配一些不同系统的文件类型

 public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".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());
}

因为网上有的文章的方法不能使用,所以在这里重复写了一个,指直接拿去用就好了.

finsh