Android Open Source - android-demos Query Sorted Files Activity

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License

The source code is released under:

Apache License

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Java Source Code

/**
 * Copyright 2014 Google Inc. All Rights Reserved.
 *//from   w w w  .  j  a va 2s . c o  m
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.gms.drive.sample.demo;

import android.os.Bundle;
import android.widget.ListView;

import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.drive.Drive;
import com.google.android.gms.drive.DriveApi;
import com.google.android.gms.drive.query.Query;
import com.google.android.gms.drive.query.SortOrder;
import com.google.android.gms.drive.query.SortableField;

/**
 * An activity to illustrate how to sort the results of a query.
 */
public class QuerySortedFilesActivity extends BaseDemoActivity {

    private ListView mResultsListView;
    private ResultsAdapter mResultsAdapter;

    @Override
    protected void onCreate(Bundle b) {
        super.onCreate(b);
        setContentView(R.layout.activity_listfiles);
        mResultsListView = (ListView) findViewById(R.id.listViewResults);
        mResultsAdapter = new ResultsAdapter(this);
        mResultsListView.setAdapter(mResultsAdapter);
    }

    /**
     * Clears the result buffer to avoid memory leaks as soon as the activity is no longer
     * visible by the user.
     */
    @Override
    protected void onStop() {
        super.onStop();
        mResultsAdapter.clear();
    }

    @Override
    public void onConnected(Bundle connectionHint) {
        super.onConnected(connectionHint);
        SortOrder sortOrder = new SortOrder.Builder()
                .addSortAscending(SortableField.TITLE)
                .build();
        Query query = new Query.Builder()
                .setSortOrder(sortOrder)
                .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;
            }
            mResultsAdapter.clear();
            mResultsAdapter.append(result.getMetadataBuffer());
        }
    };
}

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