在Android上获取所有文件夹Google Drive API
我使用新的Google驱动器api,但无法从Google驱动器中获取所有文件夹,只能获取使用Google驱动器api创建的文件夹…有人知道为什么会这样吗?
这是我的代码:
@Override protected void onResume() {
super.onResume();
if (mGoogleApiClient == null) {
// Create the API client and bind it to an instance variable.
// We use this instance as the callback for connection and connection
// failures.
// Since no account name is passed, the user is prompted to choose.
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Drive.API)
.addScope(Drive.SCOPE_FILE)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
// Connect the client. Once connected, the camera is launched.
mGoogleApiClient.connect();
}
/**
* Handles resolution callbacks.
*/
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_RESOLUTION && resultCode == RESULT_OK) {
mGoogleApiClient.connect();
}
}
/**
* Called when activity gets invisible. Connection to Drive service needs to
* be disconnected as soon as an activity is invisible.
*/
@Override
protected void onPause() {
if (mGoogleApiClient != null) {
mGoogleApiClient.disconnect();
}
super.onPause();
}
/**
* Called when {@code mGoogleApiClient} is connected.
*/
@Override
public void onConnected(Bundle connectionHint) {
Log.i(TAG, "GoogleApiClient connected");
rootFolder = Drive.DriveApi.getRootFolder(mGoogleApiClient);
rootFolder.listChildren(getGoogleApiClient()).setResultCallback(pruebaChildren);
}
ResultCallback<DriveApi.MetadataBufferResult> pruebaChildren = new
ResultCallback<DriveApi.MetadataBufferResult>() {
@Override
public void onResult(DriveApi.MetadataBufferResult metadataBufferResult) {
if (!metadataBufferResult.getStatus().isSuccess()) {
showMessage("Problem while retrieving files");
return;
}
Log.i(TAG,"got root folder");
MetadataBuffer buffer = metadataBufferResult.getMetadataBuffer();
Log.i(TAG,"Buffer count " + buffer.getCount());
if(buffer.getCount() == 0){
createFolderApp();
}
else{
for(Metadata m : buffer){
Log.i(TAG,"Metadata name " + m.getTitle() + "(" + (m.isFolder() ? "folder" : "file") + ")");
if (m.isFolder() && m.getTitle().equals(TAG)){
Log.i(TAG,"APP FOLDER FOUND");
Drive.DriveApi.getFolder(mGoogleApiClient, m.getDriveId())
.listChildren(mGoogleApiClient)
.setResultCallback(foreachAppAplication);
}
}
}
return;
}
};
现在,我想查看rootFolder驱动器中的所有文件夹,我尝试了requestSync(),但结果是相同的……请提供帮助!
另一个问题:如何设置AppFolder?我只看到getAppFolder,但如何设置?
谢谢
回答:
根据设计,GDAA仅支持FILE范围,即它将仅查找/列出由Android应用程序创建的文件夹/文件。
有两种解决方法:
- 使用GDAA 的 意图 之一,基本上是让用户选择文件/文件夹。这样,它将对您的应用程序可用。
- 使用其他API,即REST Api,它支持DRIVE范围,为您的应用程序提供完整的文件/文件夹集。
如果您想研究这两个API的行为,我在Github上放置了两个不同的演示(REST和GDAA
CRUD演示包装器)。
您问题的第二部分没有答案。您没有设置应用程序文件夹,只能获取它的DriveFolder ID。您可以使用它来创建/检索对象。
DriveFolder appFldr = Drive.DriveApi.getAppFolder(mGooleApiClient); appFldr.createFile(...);
appFldr.createFolder(...);
appFldr.listChildren(...);
appFldr.queryChildren(...);
…并且不要忘记添加 范围
祝好运
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