1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.businesscard; 18 19 import android.app.Activity; 20 import android.content.Intent; 21 import android.net.Uri; 22 import android.os.AsyncTask; 23 import android.os.Bundle; 24 import android.view.View; 25 import android.view.View.OnClickListener; 26 import android.widget.Button; 27 import android.widget.TextView; 28 29 /** 30 * A simple activity that shows a "Pick Contact" button and two fields: contact's name 31 * and phone number. The user taps on the Pick Contact button to bring up 32 * the contact chooser. Once this activity receives the result from contact picker, 33 * it launches an asynchronous query (queries should always be asynchronous) to load 34 * contact's name and phone number. When the query completes, the activity displays 35 * the loaded data. 36 */ 37 public class BusinessCardActivity extends Activity { 38 39 // Request code for the contact picker activity 40 private static final int PICK_CONTACT_REQUEST = 1; 41 42 /** 43 * An SDK-specific instance of {@link ContactAccessor}. The activity does not need 44 * to know what SDK it is running in: all idiosyncrasies of different SDKs are 45 * encapsulated in the implementations of the ContactAccessor class. 46 */ 47 private final ContactAccessor mContactAccessor = ContactAccessor.getInstance(); 48 49 /** 50 * Called with the activity is first created. 51 */ 52 @Override onCreate(Bundle savedInstanceState)53 public void onCreate(Bundle savedInstanceState) { 54 super.onCreate(savedInstanceState); 55 56 setContentView(R.layout.business_card); 57 58 // Install a click handler on the Pick Contact button 59 Button pickContact = (Button)findViewById(R.id.pick_contact_button); 60 pickContact.setOnClickListener(new OnClickListener() { 61 62 public void onClick(View v) { 63 pickContact(); 64 } 65 }); 66 } 67 68 /** 69 * Click handler for the Pick Contact button. Invokes a contact picker activity. 70 * The specific intent used to bring up that activity differs between versions 71 * of the SDK, which is why we delegate the creation of the intent to ContactAccessor. 72 */ pickContact()73 protected void pickContact() { 74 startActivityForResult(mContactAccessor.getPickContactIntent(), PICK_CONTACT_REQUEST); 75 } 76 77 /** 78 * Invoked when the contact picker activity is finished. The {@code contactUri} parameter 79 * will contain a reference to the contact selected by the user. We will treat it as 80 * an opaque URI and allow the SDK-specific ContactAccessor to handle the URI accordingly. 81 */ 82 @Override onActivityResult(int requestCode, int resultCode, Intent data)83 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 84 if (requestCode == PICK_CONTACT_REQUEST && resultCode == RESULT_OK) { 85 loadContactInfo(data.getData()); 86 } 87 } 88 89 /** 90 * Load contact information on a background thread. 91 */ loadContactInfo(Uri contactUri)92 private void loadContactInfo(Uri contactUri) { 93 94 /* 95 * We should always run database queries on a background thread. The database may be 96 * locked by some process for a long time. If we locked up the UI thread while waiting 97 * for the query to come back, we might get an "Application Not Responding" dialog. 98 */ 99 AsyncTask<Uri, Void, ContactInfo> task = new AsyncTask<Uri, Void, ContactInfo>() { 100 101 @Override 102 protected ContactInfo doInBackground(Uri... uris) { 103 return mContactAccessor.loadContact(getContentResolver(), uris[0]); 104 } 105 106 @Override 107 protected void onPostExecute(ContactInfo result) { 108 bindView(result); 109 } 110 }; 111 112 task.execute(contactUri); 113 } 114 115 /** 116 * Displays contact information: name and phone number. 117 */ bindView(ContactInfo contactInfo)118 protected void bindView(ContactInfo contactInfo) { 119 TextView displayNameView = (TextView) findViewById(R.id.display_name_text_view); 120 displayNameView.setText(contactInfo.getDisplayName()); 121 122 TextView phoneNumberView = (TextView) findViewById(R.id.phone_number_text_view); 123 phoneNumberView.setText(contactInfo.getPhoneNumber()); 124 } 125 } 126