标签：面试题 int 通话记录 list contact 通讯录 import android public
import com.suntek.contact.R;
import com.suntek.contact.model.ContactBean;
import com.suntek.contact.view.QuickAlphabeticBar;
public class ContactListAdapter extends BaseAdapter {
private LayoutInflater inflater;
private List list;
private HashMap<String, Integer> alphaIndexer; // 字母索引
private String[] sections; // 存储每个章节
private Context ctx; // 上下文
public ContactListAdapter(Context context, List list,
QuickAlphabeticBar alpha) {
this.ctx = context;
this.inflater = LayoutInflater.from(context);
this.list = list;
this.alphaIndexer = new HashMap<String, Integer>();
this.sections = new String[list.size()];
for (int i = 0; i < list.size(); i++) {
// 得到字母
String name = getAlpha(list.get(i).getSortKey());
if (!alphaIndexer.co
ntainsKey(name)) {
alphaIndexer.put(name, i);
}
}
Set sectionLetters = alphaIndexer.keySet();
ArrayList sectionList = new ArrayList(sectionLetters);
Collections.sort(sectionList); // 根据首字母进行排序
sections = new String[sectionList.size()];
sectionList.toArray(sections);
alpha.setAlphaIndexer(alphaIndexer);
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public void remove(int position) {
list.remove(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.contact_list_item, null);
holder = new ViewHolder();
holder.quickContactBadge = (QuickContactBadge) convertView
.findViewById(R.id.qcb);
holder.alpha = (TextView) convertView.findViewById(R.id.alpha);
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.number = (TextView) convertView.findViewById(R.id.number);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ContactBean contact = list.get(position);
String name = contact.getDesplayName();
String number = contact.getPhoneNum();
holder.name.setText(name);
holder.number.setText(number);
holder.quickContactBadge.assignContactUri(Contacts.getLookupUri(
contact.getContactId(), contact.getLookUpKey()));
if (0 == contact.getPhotoId()) {
holder.quickContactBadge.setImageResource(R.drawable.touxiang);
} else {
Uri uri = ContentUris.withAppendedId(
ContactsContract.Contacts.CONTENT_URI,
contact.getContactId());
InputStream input = ContactsContract.Contacts
.openContactPhotoInputStream(ctx.getContentResolver(), uri);
Bitmap contactPhoto = BitmapFactory.decodeStream(input);
holder.quickContactBadge.setImageBitmap(contactPhoto);
}
// 当前字母
String currentStr = getAlpha(contact.getSortKey());
// 前面的字母
String previewStr = (position - 1) >= 0 ? getAlpha(list.get(
position - 1).getSortKey()) : " ";
if (!previewStr.equals(currentStr)) {
holder.alpha.setVisibility(View.VISIBLE);
holder.alpha.setText(currentStr);
} else {
holder.alpha.setVisibility(View.GONE);
}
return convertView;
}
private static class ViewHolder {
QuickContactBadge quickContactBadge;
TextView alpha;
TextView name;
TextView number;
}
/**
-
获取首字母
-
@param str
-
@return
*/
private String getAlpha(String str) {
if (str == null) {
return “#”;
}
if (str.trim().length() == 0) {
return “#”;
}
char c = str.trim().substring(0, 1).charAt(0);
// 正则表达式匹配
Pattern pattern = Pattern.compile("1+$");
if (pattern.matcher(c + “”).matches()) {
return (c + “”).toUpperCase(); // 将小写字母转换为大写
} else {
return “#”;
}
}
}
/Contact_Demo/src/com/suntek/contact/ContactListActivity.java
package com.suntek.contact;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.AsyncQueryHandler;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.ListView;
import com.suntek.contact.adapter.ContactListAdapter;
import com.suntek.contact.model.ContactBean;
import com.suntek.contact.view.QuickAlphabeticBar;
/**
-
联系人列表
-
@author Administrator
*/
public class ContactListActivity extends Activity {
private ContactListAdapter adapter;
private ListView contactList;
private List list;
private AsyncQueryHandler asyncQueryHandler; // 异步查询数据库类对象
private QuickAlphabeticBar alphabeticBar; // 快速索引条
private Map<Integer, ContactBean> contactIdMap = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contact_list_view);
contactList = (ListView) findViewById(R.id.contact_list);
alphabeticBar = (QuickAlphabeticBar) findViewById(R.id.fast_scroller);
// 实例化
asyncQueryHandler = new MyAsyncQueryHandler(getContentResolver());
init();
}
/**
- 初始化数据库查询参数
*/
private void init() {
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI; // 联系人Uri；
// 查询的字段
String[] projection = { ContactsContract.CommonDataKinds.Phone._ID,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.DATA1, “sort_key”,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.PHOTO_ID,
ContactsContract.CommonDataKinds.Phone.LOOKUP_KEY };
// 按照sort_key升序查詢
asyncQueryHandler.startQuery(0, null, uri, projection, null, null,
“sort_key COLLATE LOCALIZED asc”);
}
/**
-
@author Administrator
*/
private class MyAsyncQueryHandler extends AsyncQueryHandler {
public MyAsyncQueryHandler(ContentResolver cr) {
super(cr);
}
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor != null && cursor.getCount() > 0) {
contactIdMap = new HashMap<Integer, ContactBean>();
list = new ArrayList();
cursor.moveToFirst(); // 游标移动到第一项
for (int i = 0; i < cursor.getCount(); i++) {
cursor.moveToPosition(i);
String name = cursor.getString(1);
String number = cursor.getString(2);
String sortKey = cursor.getString(3);
int contactId = cursor.getInt(4);
Long photoId = cursor.getLong(5);
String lookUpKey = cursor.getString(6);
if (contactIdMap.containsKey(contactId)) {
// 无操作
} else {
// 创建联系人对象
ContactBean contact = new ContactBean();
contact.setDesplayName(name);
contact.setPhoneNum(number);
contact.setSortKey(sortKey);
contact.setPhotoId(photoId);
contact.setLookUpKey(lookUpKey);
list.add(contact);
contactIdMap.put(contactId, contact);
}
}
if (list.size() > 0) {
setAdapter(list);
}
}
super.onQueryComplete(token, cookie, cursor);
}
}
private void setAdapter(List list) {
adapter = new ContactListAdapter(this, list, alphabeticBar);
contactList.setAdapter(adapter);
alphabeticBar.init(ContactListActivity.this);
alphabeticBar.setListView(contactList);
alphabeticBar.setHight(alphabeticBar.getHeight());
alphabeticBar.setVisibility(View.VISIBLE);
}
}
自定义组件：
package com.suntek.contact.view;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.LinearLayout;
public class SlidingLinearLayout extends LinearLayout {
public SlidingLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return super.onInterceptTouchEvent(ev);
}
}
/Contact_Demo/src/com/suntek/contact/view/QuickAlphabeticBar.java
package com.suntek.contact.view;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import com.suntek.contact.R;
/**
-
字母索引条
-
@author Administrator
*/
public class QuickAlphabeticBar extends ImageButton {
private TextView mDialogText; // 中间显示字母的文本框
private Handler mHandler; // 处理UI的句柄
private ListView mList; // 列表
private float mHight; // 高度
// 字母列表索引
private String[] letters = new String[] { “#”, “A”, “B”, “C”, “D”, “E”,
“F”, “G”, “H”, “I”, “J”, “K”, “L”, “M”, “N”, “O”, “P”, “Q”, “R”,
“S”, “T”, “U”, “V”, “W”, “X”, “Y”, “Z” };
// 字母索引哈希表
private HashMap<String, Integer> alphaIndexer;
Paint paint = new Paint();
boolean showBkg = false;
int choose = -1;
public QuickAlphabeticBar(Context context) {
super(context);
}
public QuickAlphabeticBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public QuickAlphabeticBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
// 初始化
public void init(Activity ctx) {
mDialogText = (TextView) ctx.findViewById(R.id.fast_position);
mDialogText.setVisibility(View.INVISIBLE);
mHandler = new Handler();
}
// 设置需要索引的列表
public void setListView(ListView mList) {
this.mList = mList;
}
// 设置字母索引哈希表
public void setAlphaIndexer(HashMap<String, Integer> alphaIndexer) {
this.alphaIndexer = alphaIndexer;
}
// 设置字母索引条的高度
public void setHight(float mHight) {
this.mHight = mHight;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
int act = event.getAction();
float y = event.getY();
final int oldChoose = choose;
// 计算手指位置，找到对应的段，让mList移动段开头的位置上
int selectIndex = (int) (y / (mHight / letters.length));
if (selectIndex > -1 && selectIndex < letters.length) { // 防止越界
String key = letters[selectIndex];
if (alphaIndexer.containsKey(key)) {
int pos = alphaIndexer.get(key);
if (mList.getHeaderViewsCount() > 0) { // 防止ListView有标题栏,本例中没有
this.mList.setSelectionFromTop(
pos + mList.getHeaderViewsCount(), 0);
} else {
this.mList.setSelectionFromTop(pos, 0);
}
mDialogText.setText(letters[selectIndex]);
}
}
switch (act) {
case MotionEvent.ACTION_DOWN:
showBkg = true;
if (oldChoose != selectIndex) {
if (selectIndex > 0 && selectIndex < letters.length) {
choose = selectIndex;
invalidate();
}
}
if (mHandler != null) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (mDialogText != null
&& mDialogText.getVisibility() == View.INVISIBLE) {
mDialogText.setVisibility(VISIBLE);
}
}
});
}
break;
case MotionEvent.ACTION_MOVE:
if (oldChoose != selectIndex) {
if (selectIndex > 0 && selectIndex < letters.length) {
choose = selectIndex;
invalidate();
}
}
break;
case MotionEvent.ACTION_UP:
showBkg = false;
choose = -1;
if (mHandler != null) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (mDialogText != null
&& mDialogText.getVisibility() == View.VISIBLE) {
mDialogText.setVisibility(INVISIBLE);
}
}
});
}
break;
default:
break;
}
return super.onTouchEvent(event);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int height = getHeight();
int width = getWidth();
int sigleHeight = height / letters.length; // 单个字母占的高度
for (int i = 0; i < letters.length; i++) {
paint.setColor(Color.WHITE);
paint.setTextSize(20);
paint.setTypeface(Typeface.DEFAULT_BOLD);
break;
case MotionEvent.ACTION_MOVE:
if (oldChoose != selectIndex) {
if (selectIndex > 0 && selectIndex < letters.length) {
choose = selectIndex;
invalidate();
}
}
break;
case MotionEvent.ACTION_UP:
showBkg = false;
choose = -1;
if (mHandler != null) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (mDialogText != null
&& mDialogText.getVisibility() == View.VISIBLE) {
mDialogText.setVisibility(INVISIBLE);
}
}
});
}
break;
default:
break;
}
return super.onTouchEvent(event);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int height = getHeight();
int width = getWidth();
int sigleHeight = height / letters.length; // 单个字母占的高度
for (int i = 0; i < letters.length; i++) {
paint.setColor(Color.WHITE);
paint.setTextSize(20);
paint.setTypeface(Typeface.DEFAULT_BOLD);
A-Za-z ↩︎
标签：面试题,int,通话记录,list,contact,通讯录,import,android,public 来源： https://blog.csdn.net/m0_66264533/article/details/122759681
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