126 lines
4.6 KiB
Java
126 lines
4.6 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.businesscard;
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import android.app.Activity;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.TextView;
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/**
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* A simple activity that shows a "Pick Contact" button and two fields: contact's name
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* and phone number. The user taps on the Pick Contact button to bring up
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* the contact chooser. Once this activity receives the result from contact picker,
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* it launches an asynchronous query (queries should always be asynchronous) to load
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* contact's name and phone number. When the query completes, the activity displays
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* the loaded data.
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*/
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public class BusinessCardActivity extends Activity {
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// Request code for the contact picker activity
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private static final int PICK_CONTACT_REQUEST = 1;
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/**
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* An SDK-specific instance of {@link ContactAccessor}. The activity does not need
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* to know what SDK it is running in: all idiosyncrasies of different SDKs are
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* encapsulated in the implementations of the ContactAccessor class.
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*/
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private final ContactAccessor mContactAccessor = ContactAccessor.getInstance();
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/**
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* Called with the activity is first created.
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*/
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.business_card);
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// Install a click handler on the Pick Contact button
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Button pickContact = (Button)findViewById(R.id.pick_contact_button);
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pickContact.setOnClickListener(new OnClickListener() {
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public void onClick(View v) {
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pickContact();
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}
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});
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}
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/**
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* Click handler for the Pick Contact button. Invokes a contact picker activity.
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* The specific intent used to bring up that activity differs between versions
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* of the SDK, which is why we delegate the creation of the intent to ContactAccessor.
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*/
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protected void pickContact() {
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startActivityForResult(mContactAccessor.getPickContactIntent(), PICK_CONTACT_REQUEST);
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}
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/**
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* Invoked when the contact picker activity is finished. The {@code contactUri} parameter
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* will contain a reference to the contact selected by the user. We will treat it as
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* an opaque URI and allow the SDK-specific ContactAccessor to handle the URI accordingly.
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*/
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == PICK_CONTACT_REQUEST && resultCode == RESULT_OK) {
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loadContactInfo(data.getData());
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}
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}
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/**
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* Load contact information on a background thread.
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*/
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private void loadContactInfo(Uri contactUri) {
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/*
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* We should always run database queries on a background thread. The database may be
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* locked by some process for a long time. If we locked up the UI thread while waiting
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* for the query to come back, we might get an "Application Not Responding" dialog.
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*/
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AsyncTask<Uri, Void, ContactInfo> task = new AsyncTask<Uri, Void, ContactInfo>() {
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@Override
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protected ContactInfo doInBackground(Uri... uris) {
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return mContactAccessor.loadContact(getContentResolver(), uris[0]);
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}
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@Override
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protected void onPostExecute(ContactInfo result) {
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bindView(result);
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}
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};
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task.execute(contactUri);
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}
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/**
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* Displays contact information: name and phone number.
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*/
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protected void bindView(ContactInfo contactInfo) {
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TextView displayNameView = (TextView) findViewById(R.id.display_name_text_view);
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displayNameView.setText(contactInfo.getDisplayName());
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TextView phoneNumberView = (TextView) findViewById(R.id.phone_number_text_view);
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phoneNumberView.setText(contactInfo.getPhoneNumber());
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}
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}
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