Android Q存储SD卡-Android29 存储SD卡

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本文链接： https://blog.csdn.net/ChaoLi_Chen/article/details/99594798

Android Q最近公司相机升级到AndroidQ 存储SD卡，遇到了比较多的坑，将部分关键代码记录下来，方便下次使用。

Android 区分大小写 再使用 StorageVolume.java 的getUuid()方法只能得到大写，此坑比较深，已经帮你把坑填好。

如下是存储图片的关键代码 使用

public static boolean writeFile(ContentResolver contentResolver, String title, String path, byte[] data) {
        FileOutputStream out = null;
        try {
            if (isSaveSDCard() && SDCard.instance().isWriteable()){
                ContentValues values = new ContentValues();
                values.put(MediaStore.Images.Media.DISPLAY_NAME, title);
                values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
                values.put(MediaStore.Images.Media.RELATIVE_PATH, Environment.DIRECTORY_DCIM+"/Camera/"); //修改路径
                Uri collection = MediaStore.Images.Media.getContentUri(SDCard.instance().getSdCardExternalVolumeName());
                Uri item = contentResolver.insert(collection, values);//获取插入路径
                Log.d("chencl_","  item insert  Uri : " +item);
                 ParcelFileDescriptor pfd = contentResolver.openFileDescriptor(item, "rw", null);
                   if (pfd != null){
                       out = (FileOutputStream) contentResolver.openOutputStream(item);
                       if (out != null) {
                           out.write(data);
                       }
                   }
            } else {
                out = new FileOutputStream(path);
                out.write(data);
            }
        } catch (Exception e) {
            Log.e(TAG, "Failed to write data", e);
            return false;
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (Exception e) {
                Log.e(TAG, "Failed to close file after write", e);
            }
        }
        return true;
    }

            Log.v(TAG, "New video filename: " + path);
            if (Storage.isSaveSDCard() && SDCard.instance().isWriteable()) {
                mCurrentVideoValues.put(MediaStore.Video.Media.RELATIVE_PATH, Environment.DIRECTORY_DCIM+"/Camera");
                Uri collection = MediaStore.Video.Media.getContentUri(SDCard.instance().getSdCardExternalVolumeName());
                Uri item = mContentResolver.insert(collection, mCurrentVideoValues);
                try (ParcelFileDescriptor pfd = mContentResolver.openFileDescriptor(item, "rw", null)) {
                    ParcelFileDescriptor parcelFileDescriptor = ParcelFileDescriptor.fromFd(pfd.getFd());//必须转化一下不然录像提示无次文件
                    mMediaRecorder.setOutputFile(parcelFileDescriptor.getFileDescriptor());
                    // Write data into the pending image.
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else {
                mMediaRecorder.setOutputFile(path);
            }

获取SD卡名称

   public  String getSdCardExternalVolumeName() {
        ArrayList<String> volumenames = new ArrayList<>( MediaStore.getExternalVolumeNames(mContext));
        return  (volumenames.size() > VOLUME_SDCARD_INDEX) ?  volumenames.get(VOLUME_SDCARD_INDEX) : null;
    }

    private void initVolume() {
        final StorageVolume[] volumes = ReflectionUtils.getVolumeList(mStorageManager);
        mVolume = (volumes.length > VOLUME_SDCARD_INDEX) ?
                volumes[VOLUME_SDCARD_INDEX] : null;
        mPath = null;
        mRawpath = null;
    }

   public static StorageVolume[] getVolumeList(StorageManager storageManager) {
        StorageVolume[] result = null;
        try {
            Class storageManagerCls = Class.forName("android.os.storage.StorageManager");
            Method getVolumeListMethod = storageManagerCls.getMethod("getVolumeList");
            getVolumeListMethod.setAccessible(true);
            result = (StorageVolume[]) getVolumeListMethod.invoke(storageManager);
        } catch (Exception e) {
            Log.e(TAG, "getVolumeList Exp:" + expToString(e));
            return result;
        }
        if (DEBUG) {
            Log.d(TAG, "getVolumeList result:" + result);
        }
        return result;
    }