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.
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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