解决android4.4以上系统的相册选择图片后获取不到有效的URI

最近用到上传图片发现，当选择相册里的照片时，会出现无效的URI，android4.4以上系统，选择相册中的最近照片，也会报同样的错误。

找到如下两个方法：

方法一：

 /**  * 图片选择及拍照结果  */  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode != RESULT_OK) {
            return;
        }
        Uri uri = null;
        switch (requestCode) {
            case PHOTOZOOM:// 相册  if (data == null) {
                    return;
                }
                uri = data.getData();
 String[] proj = {MediaStore.Images.Media.DATA};  Cursor cursor = managedQuery(uri, proj, null, null, null);  int column_index = cursor  .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);  cursor.moveToFirst();  path = cursor.getString(column_index);// 图片在的路径  Intent intent3 = new Intent(mContext, UserRectClipHead.class);
                intent3.putExtra("path", path);
                Log.i("选择图片路径",path+"");
                startActivityForResult(intent3, IMAGE_COMPLETE);
                break;
            case PHOTOTAKE:// 拍照  path = photoSavePath + photoSaveName;
                uri = Uri.fromFile(new File(path));
                Intent intent2 = new Intent(mContext, UserRectClipHead.class);
                intent2.putExtra("path", path);
                startActivityForResult(intent2, IMAGE_COMPLETE);
                break;
            case IMAGE_COMPLETE:
                final String temppath = data.getStringExtra("path");
                Intent intent = new Intent();
                saveAllPath = FileUtils.saveBitmap(compressImage(BitmapUtils.UrlToBitmap(temppath)), ((int) (Math.random() * 10000)) + ".png");//质量压缩并存储得到path  intent.putExtra("path", saveAllPath);
// intent.putExtra("path", temppath);  setResult(0, intent);
                try {
                    cbuilder = new CustomDialogLoading.Builder(mContext, "上传中...");
                    mDialog = cbuilder.create();
                    mDialog.show();
                    postFile(saveAllPath);
                } catch (Exception e) {
                    // TODO Auto-generated catch block  e.printStackTrace();
                }
                add_img.setImageBitmap(BitmapUtils.UrlToBitmap(temppath));
                break;
            default:
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

发现有些手机获取不到图片的path，后来经查找发现是因为android4.4以上的手机相册中有个最近的照片，是获取不到path路径的，更改如下可以解决：

 /**  * 图片选择及拍照结果  */  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode != RESULT_OK) {
            return;
        }
        Uri uri = null;
        switch (requestCode) {
            case PHOTOZOOM:// 相册  if (data == null) {
                    return;
                }
                uri = data.getData();  //此处为了解决android4.4 相册选择时的 选择最近图片 获取不到path问题  if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT){//4.4及以上  String wholeID = DocumentsContract.getDocumentId(uri);
                    String id = wholeID.split(":")[1];
                    String[] column = { MediaStore.Images.Media.DATA };
                    String sel = MediaStore.Images.Media._ID + "=?";
                    Cursor cursor = this.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column,
                            sel, new String[] { id }, null);
                    int columnIndex = cursor.getColumnIndex(column[0]);
                    if (cursor.moveToFirst()) {
                        path = cursor.getString(columnIndex);
                    }
                    cursor.close();
                }else{//4.4以下，即4.4以上获取路径的方法  String[] projection = { MediaStore.Images.Media.DATA };
                    Cursor cursor = this.getContentResolver().query(uri, projection, null, null, null);
                    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                    cursor.moveToFirst();
                    path = cursor.getString(column_index);
                }
// }  Intent intent3 = new Intent(mContext, UserRectClipHead.class);
                intent3.putExtra("path", path);
                Log.i("x选择图片",path+"");
                startActivityForResult(intent3, IMAGE_COMPLETE);
                break;
            case PHOTOTAKE:// 拍照  path = photoSavePath + photoSaveName;
                uri = Uri.fromFile(new File(path));
                Intent intent2 = new Intent(mContext, UserRectClipHead.class);
                intent2.putExtra("path", path);
                startActivityForResult(intent2, IMAGE_COMPLETE);
                break;
            case IMAGE_COMPLETE:
                final String temppath = data.getStringExtra("path");
                Intent intent = new Intent();
                saveAllPath = FileUtils.saveBitmap(compressImage(BitmapUtils.UrlToBitmap(temppath)), ((int) (Math.random() * 10000)) + ".png");//质量压缩并存储得到path  intent.putExtra("path", saveAllPath);
// intent.putExtra("path", temppath);  setResult(0, intent);
                try {
                    cbuilder = new CustomDialogLoading.Builder(mContext, "上传中...");
                    mDialog = cbuilder.create();
                    mDialog.show();
                    postFile(saveAllPath);
                } catch (Exception e) {
                    // TODO Auto-generated catch block  e.printStackTrace();
                }
                add_img.setImageBitmap(BitmapUtils.UrlToBitmap(temppath));
                break;
            default:
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

方法二：

 /**
  * 根据Uri获取图片绝对路径，解决Android4.4以上版本Uri转换
  * @param activity
  * @param imageUri
  * @author yaoxing
  * @date 2014-10-12
  */
 @TargetApi(19)
 public static String getImageAbsolutePath(Activity context, Uri imageUri) {
     if (context == null || imageUri == null)
         return null;
     if (android.os.Build.VERSION.SDK_INT >= android.os.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;
 }

 public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
     Cursor cursor = null;
     String column = MediaStore.Images.Media.DATA;
     String[] projection = { column };
     try {
         cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
         if (cursor != null && cursor.moveToFirst()) {
             int index = cursor.getColumnIndexOrThrow(column);
             return cursor.getString(index);
         }
     } finally {
         if (cursor != null)
             cursor.close();
     }
     return null;
 }

 /**
  * @param uri The Uri to check.
  * @return Whether the Uri authority is ExternalStorageProvider.
  */
 public static boolean isExternalStorageDocument(Uri uri) {
     return "com.android.externalstorage.documents".equals(uri.getAuthority());
 }

 /**
  * @param uri The Uri to check.
  * @return Whether the Uri authority is DownloadsProvider.
  */
 public static boolean isDownloadsDocument(Uri uri) {
     return "com.android.providers.downloads.documents".equals(uri.getAuthority());
 }

 /**
  * @param uri The Uri to check.
  * @return Whether the Uri authority is MediaProvider.
  */
 public static boolean isMediaDocument(Uri uri) {
     return "com.android.providers.media.documents".equals(uri.getAuthority());
 }

 /**
  * @param uri The Uri to check.
  * @return Whether the Uri authority is Google Photos.
  */
 public static boolean isGooglePhotosUri(Uri uri) {
     return "com.google.android.apps.photos.content".equals(uri.getAuthority());
 }