本文介绍了Android:获取DriveId进行还原的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我的应用在Google云端硬盘上进行了基于云端的备份。备份顺利进行。



我使用以下代码进行备份:

  void saveToDrive ){
//上传文件的代码
DriveId mDriveId = metadataResult.getMetadata()。getDriveId();
SharedPreferences sharedPreferences = getApplicationContext()。getSharedPreferences(getApplicationContext()。getPackageName(),MODE_PRIVATE);
sharedPreferences.edit()。putString(DriveId,mDriveId.encodeToString())。apply();
....
}

正如你所看到的,我保存了当我备份时, DriveId SharedPreferences 。因此,使用 DriveId ,我可以恢复为:

  void readFromDrive DriveId mDriveId){// DriveId在应用重新安装后不可用! 
//下载文件并恢复的代码
}

我的恢复操作需要一个 DriveId 来下载备份文件。我想在应用重新安装时触发恢复 。但是,我没有能够获取 DriveId ,以便我可以下载所需的文件。



我该怎么做?请帮我解决一些问题。



谢谢。

解决方案

我通过使用代码首先查询Google Drive的内容来解决它:

  public class GDriveQuery extends BaseDemo {
@Override
public void onConnected(Bundle connectionHint){
super.onConnected(connectionHint);
Query query = new Query.Builder()
.addFilter(Filters.eq(SearchableField.TITLE,field))
.addFilter(Filters.not(Filters.eq(SearchableField。 TRASHED,true)))
.build();
Drive.DriveApi.query(getGoogleApiClient(),查询)
.setResultCallback(metadataCallback);
}

final private ResultCallback< DriveApi.MetadataBufferResult> metadataCallback =
new ResultCallback< DriveApi.MetadataBufferResult>(){
@Override
public void onResult(DriveApi.MetadataBufferResult result){
if(!result.getStatus()。isSuccess ()){
showMessage(检索结果时出现问题);
return;
}
System.out.println(SUCCESS !!);
MetadataBuffer mdb;
mdb = result.getMetadataBuffer(); (元数据md:mdb){
System.out.println(md.getDriveId()。encodeToString());
}
}
};

$ / code>

上面的代码给我返回了 DriveId 。然后使用 DriveId 我使用了上面问题中发布的函数 readFromDrive(driveId)



有效!

感谢各位的帮助。


My app takes a cloud-based backup on Google Drive. The backup occurs smoothly.

I use the following code for backup:

void saveToDrive() {
    // Code to upload file
    DriveId mDriveId = metadataResult.getMetadata().getDriveId();
    SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences(getApplicationContext().getPackageName(), MODE_PRIVATE);
    sharedPreferences.edit().putString("DriveId", mDriveId.encodeToString()).apply();
    ....
}

As you can see, I save the DriveId to SharedPreferences when I backup. So using that DriveId, I can restore as:

void readFromDrive(DriveId mDriveId) { // DriveId is not available after app reinstall!!
    // Code to download file and restore
}

My restore operation requires a DriveId to download the backed-up file. I want to trigger a restore when the app is reinstalled. But, I am not able to get the DriveId so that I may download the required file.

How do I do that? Please, I am desperate for some help.

Thanks.

解决方案

I solved it by first querying the contents of Google Drive using the code:

public class GDriveQuery extends BaseDemo {
    @Override
    public void onConnected(Bundle connectionHint) {
        super.onConnected(connectionHint);
        Query query = new Query.Builder()
            .addFilter(Filters.eq(SearchableField.TITLE, "field"))
            .addFilter(Filters.not(Filters.eq(SearchableField.TRASHED, true)))
            .build();
        Drive.DriveApi.query(getGoogleApiClient(), query)
            .setResultCallback(metadataCallback);
    }

    final private ResultCallback<DriveApi.MetadataBufferResult> metadataCallback =
        new ResultCallback<DriveApi.MetadataBufferResult>() {
            @Override
            public void onResult(DriveApi.MetadataBufferResult result) {
                if (!result.getStatus().isSuccess()) {
                    showMessage("Problem while retrieving results");
                    return;
                }
                System.out.println("SUCCESS!!");
                MetadataBuffer mdb;
                mdb = result.getMetadataBuffer();
                for (Metadata md : mdb) {
                    System.out.println(md.getDriveId().encodeToString());
                }
            }
        };
}

The above code returned me the DriveId. And then using that DriveId I used the function readFromDrive(driveId) as posted in the question above.

It works!!

Thanks guys for all your help.

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09-26 07:23