QueryFilesWithTitleActivity.java

/*
 * Copyright 2013 Google Inc. All Rights Reserved.
 *
 *  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.support.annotation.NonNull;
import android.util.Log;
import android.widget.ListView;

import com.google.android.gms.drive.Metadata;
import com.google.android.gms.drive.MetadataBuffer;
import com.google.android.gms.drive.query.Filters;
import com.google.android.gms.drive.query.Query;
import com.google.android.gms.drive.query.SearchableField;
import com.google.android.gms.drive.widget.DataBufferAdapter;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;

/**
 * An activity to illustrate how to query files with title equal to HelloWorld.txt.
 */
public class QueryFilesWithTitleActivity extends BaseDemoActivity {
    private static final String TAG = "QueryFilesWithTitle";

    private DataBufferAdapter<Metadata> mResultsAdapter;

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

    @Override
    protected void onDriveClientReady() {
        listFiles();
    }

    /**
     * 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();
    }

    /**
     * Retrieves results for the next page. For the first run,
     * it retrieves results for the first page.
     */
    private void listFiles() {
        // [START query_title]
        Query query = new Query.Builder()
                              .addFilter(Filters.eq(SearchableField.TITLE, "HelloWorld.txt"))
                              .build();
        // [END query_title]
        Task<MetadataBuffer> queryTask =
                getDriveResourceClient()
                        .query(query)
                        .addOnSuccessListener(this,
                                new OnSuccessListener<MetadataBuffer>() {
                                    @Override
                                    public void onSuccess(MetadataBuffer metadataBuffer) {
                                        mResultsAdapter.append(metadataBuffer);
                                    }
                                })
                        .addOnFailureListener(this, new OnFailureListener() {
                            @Override
                            public void onFailure(@NonNull Exception e) {
                                Log.e(TAG, "Error retrieving files", e);
                                showMessage(getString(R.string.query_failed));
                                finish();
                            }
                        });
    }
}