Android_LoaderManager获取联系人
故事概况:
小农在开发的时候队长叫本人封装一个工具类,直接调用就能调起系统通讯录,选择人员后,把电话号码带回到UI……..
于是故事开始了….
- 写一个静态的类用来调用方法
- 封装进入系统联系人界面的方法如下
// 进入系统通讯录界面
public static void gotoSystemContact(Activity activityContext, int requestCode) {
Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
activityContext.startActivityForResult(moblieIntent, requestCode);
}- 写一个获取联系人内容的方法,
/** * get contact phone * * @param cursor cursor * @return all phone nums */
private static List<String> getContactPhone(Activity activityContext, Cursor cursor) {
ArrayList<String> arrayList = new ArrayList<String>();
Cursor phone = null;
try {
int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);
int phoneNum = cursor.getInt(phoneColumn);
if (phoneNum > 0) {
int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);
String contactId = cursor.getString(idColumn);
phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);
if (phone != null && phone.moveToFirst()) {
for (; !phone.isAfterLast(); phone.moveToNext()) {
int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
int phone_type = phone.getInt(typeindex);
String phoneNumber = phone.getString(index).trim();
arrayList.add(phoneNumber);
}
}
}
} catch (Exception e) {
}
if (phone != null && !phone.isClosed()) {
phone.close();
}
return arrayList;
}- 解析联系人去除空格乱七八糟的如下方法
/** * onActivityResult call the method get the contact phone num * * @param activityContext activity * @param data onActivityresult data * @return phoneNum */
public static String getContactResult(Activity activityContext, Intent data) {
String phoneNum = "";
Cursor cursor = null;
try {
if (data != null) {
Uri contactData = data.getData();
if (contactData != null) {
cursor = activityContext.managedQuery(contactData, null, null, null, null);
}
if (cursor != null && cursor.moveToFirst()) {
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
List<String> numbers = getContactPhone(activityContext, cursor);
if (numbers != null && numbers.size() > 0) {
String[] mPhoneNumbers = new String[numbers.size()];
for (int i = 0; i < numbers.size(); i++) {
String number = numbers.get(i);
String newNumber = number.replaceAll("[^\\d]", "");
mPhoneNumbers[i] = newNumber;
}
phoneNum = mPhoneNumbers[0];
}
}
}
} catch (Exception e) {
}
return phoneNum;
}就是这个方法,看到没有很顺利的返回了 phoneNum,但是数据库的coucor没有关闭,一个严谨的程序员怎么能忍受游标不关闭呢,其实我是能忍受的…..队长不能接受,必须要关闭 关闭能带来的问题是什么,第一次能获取到联系人号码,然后第二次执行的时候 在UI的onActivityResult里面会崩溃并且报游标关闭错误….
如下图:
但是如果你不关闭游标的话…..传说中的代码不严谨,内存泄漏什么的一堆,于是就的改…牺牲点app内存和一点点的代码不严谨你完成这个功能就需要一个操作,
ctr + D 删除关闭代码就行了…
但是这不允许,第一用了过时的API,第二游标必须关闭,所以只能修改实现方式
- 新的实现方法,采用LoaderManager来完成,
我们修改下获取手机号的方法如下
/** * onActivityResult call the method get the contact phone num * * @param activityContext activity * @param data data * @param phoneNumGetListener phone num callback */
public static void getContactResult(final Activity activityContext, Intent data, final OnPhoneNumGetListener phoneNumGetListener) {
if (data != null) {
final Uri contactData = data.getData();
if (contactData != null) {
activityContext.getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
CursorLoader cursorLoader = new CursorLoader(activityContext);
cursorLoader.setUri(contactData);
return cursorLoader;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
if (data != null && data.moveToFirst()) {
String name = data.getString(data.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
List<String> numbers = getContactPhone(activityContext, data);
if (numbers != null && numbers.size() > 0) {
String[] mPhoneNumbers = new String[numbers.size()];
for (int i = 0; i < numbers.size(); i++) {
String number = numbers.get(i);
String newNumber = number.replaceAll("[^\\d]", "");
mPhoneNumbers[i] = newNumber;
}
if (phoneNumGetListener != null) {
phoneNumGetListener.getPhoneNum(mPhoneNumbers[0]);
}
}
data.close();
// when get data do not forget destoryloader
activityContext.getLoaderManager().destroyLoader(0);
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
}
}
);
}
}
}这里我们传入了获得到手机号的一个异步回调,这就是LoaderManager的最大的区别,cursor = activityContext.managedQuery(contactData, null, null, null, null);
这方法是同步的,而且这个方法是过时的……
这样我们获取手机号的方法和解析就放到了 onLoadFinished里面
代码基本就这么多,activity里面只需要这样既可
@Override
protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == MOBILE_REQUEST_CODE) {
ATContactUtilLoadManager.getContactResult(this, data, new ATContactUtilLoadManager.OnPhoneNumGetListener() {
@Override
public void getPhoneNum(String num) {
phoneNum.setText("loadmanager得到的>>>> " + num);
}
});
}
}这样我们就能通过loadmanager拿到手机号了,关键的是curcor关闭了,任务完成了…..可能是最近看乔布斯传魔怔了,要是以前的脾气,早就pk起来了 ,删除一句代码就能解决干嘛费劲搞这个loadermanager
反过来想想加入 谷歌删除了过时的API. 或者由于你这个游标没关闭造成的内存泄漏正好达到crash的内存上限..罪过就大了..从自我做起吧,写一篇博客记录下今天的内容,两种工具类喜欢的可以看下
完整代码如下:
**
- 第一种普通方法代码
**
package com.asiatravel.atjardemo.utils;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;
import java.util.ArrayList;
import java.util.List;
/** * <pre>use like this</pre> * <pre>1, call gotoSystemContact</pre> * <pre>2, onActivityResult call getContactResult</pre> * * Created by jsion on 16/5/10. */
public class ATContactUtilNormal {
private ATContactUtilNormal() {
}
public static void gotoSystemContact(Activity activityContext, int requestCode) {
Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
activityContext.startActivityForResult(moblieIntent, requestCode);
}
/** * onActivityResult call the method get the contact phone num * * @param activityContext activity * @param data onActivityresult data * @return phoneNum */
public static String getContactResult(Activity activityContext, Intent data) {
String phoneNum = "";
Cursor cursor = null;
try {
if (data != null) {
Uri contactData = data.getData();
if (contactData != null) {
cursor = activityContext.managedQuery(contactData, null, null, null, null);
}
if (cursor != null && cursor.moveToFirst()) {
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
List<String> numbers = getContactPhone(activityContext, cursor);
if (numbers != null && numbers.size() > 0) {
String[] mPhoneNumbers = new String[numbers.size()];
for (int i = 0; i < numbers.size(); i++) {
String number = numbers.get(i);
String newNumber = number.replaceAll("[^\\d]", "");
mPhoneNumbers[i] = newNumber;
}
phoneNum = mPhoneNumbers[0];
}
}
}
} catch (Exception e) {
}
return phoneNum;
}
/** * get contact phone * * @param cursor cursor * @return all phone nums */
private static List<String> getContactPhone(Activity activityContext, Cursor cursor) {
ArrayList<String> arrayList = new ArrayList<String>();
Cursor phone = null;
try {
int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);
int phoneNum = cursor.getInt(phoneColumn);
if (phoneNum > 0) {
int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);
String contactId = cursor.getString(idColumn);
phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);
if (phone != null && phone.moveToFirst()) {
for (; !phone.isAfterLast(); phone.moveToNext()) {
int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
int phone_type = phone.getInt(typeindex);
String phoneNumber = phone.getString(index).trim();
arrayList.add(phoneNumber);
}
}
}
} catch (Exception e) {
}
if (phone != null && !phone.isClosed()) {
phone.close();
}
return arrayList;
}
}
**
- 第二种,loadermanager实现
**
package com.asiatravel.atjardemo.utils;
import android.app.Activity;
import android.app.LoaderManager;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import java.util.ArrayList;
import java.util.List;
/** * <pre>use like this</pre> * <pre>1, call gotoSystemContact</pre> * <pre>2, onActivityResult call getContactResult</pre> * * Created by jsion on 16/5/10. */
public class ATContactUtilLoadManager {
private ATContactUtilLoadManager() {
}
public static void gotoSystemContact(Activity activityContext, int requestCode) {
Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
activityContext.startActivityForResult(moblieIntent, requestCode);
}
/** * onActivityResult call the method get the contact phone num * * @param activityContext activity * @param data onActivityresult data * @return phoneNum */
public static void getContactResult(final Activity activityContext, Intent data, final OnPhoneNumGetListener phoneNumGetListener) {
if (data != null) {
final Uri contactData = data.getData();
if (contactData != null) {
activityContext.getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
CursorLoader cursorLoader = new CursorLoader(activityContext);
cursorLoader.setUri(contactData);
return cursorLoader;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
if (data != null && data.moveToFirst()) {
String name = data.getString(data.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
List<String> numbers = ATContactUtilLoadManager.getContactPhone(activityContext, data);
if (numbers != null && numbers.size() > 0) {
String[] mPhoneNumbers = new String[numbers.size()];
for (int i = 0; i < numbers.size(); i++) {
String number = numbers.get(i);
String newNumber = number.replaceAll("[^\\d]", "");
mPhoneNumbers[i] = newNumber;
}
if (phoneNumGetListener != null) {
phoneNumGetListener.getPhoneNum(mPhoneNumbers[0]);
}
}
data.close();
activityContext.getLoaderManager().destroyLoader(0);
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
}
}
);
}
}
}
/** * get contact phone * * @param cursor cursor * @return all phone nums */
public static List<String> getContactPhone(Activity activityContext, Cursor cursor) {
ArrayList<String> arrayList = new ArrayList<String>();
Cursor phone = null;
try {
int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);
int phoneNum = cursor.getInt(phoneColumn);
if (phoneNum > 0) {
int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);
String contactId = cursor.getString(idColumn);
phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);
if (phone != null && phone.moveToFirst()) {
for (; !phone.isAfterLast(); phone.moveToNext()) {
int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
int phone_type = phone.getInt(typeindex);
String phoneNumber = phone.getString(index).trim();
arrayList.add(phoneNumber);
}
}
}
} catch (Exception e) {
// ATLogUtil.e(e.toString());
}
if (phone != null && !phone.isClosed()) {
phone.close();
}
return arrayList;
}
public interface OnPhoneNumGetListener {
void getPhoneNum(String phoneNum);
}
}