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字母条索引定位

来源:网络整理  作者:网友投稿  发布时间:2020-12-27 22:53
activity_main xmlRelativeLayoutxmlns:android=http: schemas android com apk res androidandroid:layout_width=match_parentandroid:layout_height=match_pare...

返回一个int值,W。

pinyin= + pinyin + ];}/** * 此接口强行对实现它的每个类的对象进行整体排序。

则返回值0; ** 如当前对象=o对象,类的 compareTo 方法被称为它的自然比较方法 ,进行下次遍历//汉字是2个字节存储, 不显示首字母Viewholder.index.setVisibility(View.GONE);} else {// 否则, 0, M,是否带音标format.setCaseType(HanyuPinyinCaseType.UPPERCASE);//大写format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);//由于不能直接对多个汉字转换。

int heightMeasureSpec) {super.onMeasure(widthMeasureSpec,J。

0, rect);paint.getTextBounds(indexArr[i], L, 1,只能对单个汉字转换char[] arr = hanzi.toCharArray();for (int i = 0; i arr.length; i++) {if(Character.isWhitespace(arr[i]))continue;//如果是空格, attrs);// 初始化paintpaint = new Paint();paint.setAntiAlias(true);// 抗据齿}private Paint paint;// 字母的宽、高private int cellWidth;private int cellHeight;private int touchIndex = -1;// 字体选中、非选中大小private int textSize;private int textTouchSize;private String[] indexArr = { A, U, format);if(pinyinArr!=null){pinyin += pinyinArr[0];}else {pinyin += arr[i];}} catch (BadHanyuPinyinOutputFormatCombination e) {e.printStackTrace();//不是正确的汉字pinyin += arr[i];}}else {//不是汉字。

pinyin += arr[i];}}return pinyin;}} ,R.layout.item_friend, I, T, R。

name;}}} QuickIndexBarpackage com.atguigu.quickindex;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Typeface;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;/** * 自定义快速索引的View */public class QuickIndexBar extends View {public QuickIndexBar(Context context, K, P。

Y, heightMeasureSpec);cellWidth = this.getMeasuredWidth();cellHeight = this.getMeasuredHeight() / indexArr.length;textSize = cellHeight - 5;textTouchSize = cellHeight + 5;}@SuppressLint(DrawAllocation)@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);for (int i = 0; i indexArr.length; i++) {// 字母的字体大小paint.setTextSize(i == touchIndex ? textTouchSize : textSize);// 字母的字体颜色paint.setColor(i == touchIndex ? Color.parseColor(#666666): Color.WHITE);// 计算字母显示的宽高Rect bounds = new Rect();//paint.getTextBounds(str, View convertView,则返回值0; */Collections.sort(friends);}/** * adapter */class FriendAdapter extends BaseAdapter {@Overridepublic int getCount() {return friends.size();}@Overridepublic Object getItem(int position) {return friends.get(position);}@Overridepublic long getItemId(int position) {return 0;}@Overridepublic View getView(int position, ** 如当前对象o对象, E, Z };@Overrideprotected void onMeasure(int widthMeasureSpec, paint);}}@Overridepublic boolean onTouchEvent(MotionEvent event) {// 相对于当前View的事件y坐标int y = (int) event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:case MotionEvent.ACTION_MOVE:// 如果没有在当前字母的区域内, 显示holder.index.setVisibility(View.VISIBLE);}}holder.index.setText(firstWord);holder.name.setText(friend.getName());return convertView;}class ViewHolder {TextView index, X。

G,则不处理, H, str.length(),所以大于127就可以当为汉字转换if(arr[i]127){try {//由于多音字的存在, bounds);int width = bounds.width();int height = bounds.height();// 计算字母绘制的坐标float x = cellWidth / 2 - width / 2;float y = i * cellHeight + cellHeight / 2 + height / 2;// 绘制字母文本canvas.drawText(indexArr[i],则返回值=0; ** 如当前对象o对象, 调用监听器的回调方法if (onTouchIndexChange != null) {onTouchIndexChange.onChange(indexArr[touchIndex]);}}break;case MotionEvent.ACTION_UP:touchIndex = -1;// 强制重绘invalidate();break;default:break;}return true;}private OnTouchIndexChange onTouchIndexChange;public void setOnTouchIndexChange(OnTouchIndexChange onTouchIndexChange) {this.onTouchIndexChange = onTouchIndexChange;}public interface OnTouchIndexChange {public void onChange(String word);}} Friendpackage com.atguigu.quickindex;/** * 好友信息对象 */public class Friend implements ComparableFriend {private String name;//姓名private String pinyin;//姓名对应的拼音public Friend(String name) {super();this.name = name;//通过名字得到对应的拼音this.pinyin = PinYinUtils.getPinYin(name);}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPinyin() {return pinyin;}public void setPinyin(String pinyin) {this.pinyin = pinyin;}@Overridepublic String toString() {return Friend [name= + name + ,单 dan shanString[] pinyinArr = PinyinHelper.toHanyuPinyinStringArray(arr[i], F, 2000);}private void initData() {// 虚拟数据friends.add(new Friend(张晓飞));friends.add(new Friend(杨光福));friends.add(new Friend(胡继群));friends.add(new Friend(刘畅));friends.add(new Friend(钟泽兴));friends.add(new Friend(尹革新));friends.add(new Friend(安传鑫));friends.add(new Friend(张骞壬));friends.add(new Friend(温松));friends.add(new Friend(李凤秋));friends.add(new Friend(刘甫));friends.add(new Friend(娄全超));friends.add(new Friend(张猛));friends.add(new Friend(王英杰));friends.add(new Friend(李振南));friends.add(new Friend(孙仁政));friends.add(new Friend(唐春雷));friends.add(new Friend(牛鹏伟));friends.add(new Friend(姜宇航));friends.add(new Friend(刘挺));friends.add(new Friend(张洪瑞));friends.add(new Friend(张建忠));friends.add(new Friend(侯亚帅));friends.add(new Friend(刘帅));friends.add(new Friend(乔竞飞));friends.add(new Friend(徐雨健));friends.add(new Friend(吴亮));friends.add(new Friend(王兆霖));friends.add(new Friend(阿三));friends.add(new Friend(二毛));/** * Comparable,这个接口只有一个方法comparableTo(Object o) ** 其规则是当前对象与o对象进行比较, 显示首字母Viewholder.index.setVisibility(View.VISIBLE);} else {// 如果不是第一个// 上一项的拼音首字母String preFirstWord = friends.get(position - 1).getPinyin().charAt(0)+ ;if (firstWord.equals(preFirstWord)) {// 如果当前的与上一个相同,可以让自定义对象实现一个Comparable接口, x。

y,系统根据此值进行排序。

S, B, N, D, activity_main.xml RelativeLayout xmlns:android=android:layout_width=match_parentandroid:layout_height=match_parentListViewandroid:id=@+id/listviewandroid:layout_width=match_parentandroid:layout_height=match_parent /ListViewcom.atguigu.quickindex.QuickIndexBarandroid:id=@+id/qucikIndexBarandroid:layout_width=35dpandroid:layout_height=match_parentandroid:layout_alignParentRight=trueandroid:background=#CFCFCF /TextViewandroid:id=@+id/currentIndexandroid:layout_width=120dpandroid:layout_height=105dpandroid:layout_centerInParent=trueandroid:background=@drawable/bg_indexandroid:gravity=centerandroid:text=Aandroid:textColor=#ffffffandroid:textSize=30spandroid:visibility=gone //RelativeLayout item_friend.xml?xml version=1.0 encoding=utf-8?LinearLayout xmlns:android=android:layout_width=match_parentandroid:layout_height=wrap_contentandroid:orientation=vertical TextViewandroid:id=@+id/indexandroid:layout_width=match_parentandroid:layout_height=wrap_contentandroid:paddingTop=5dpandroid:paddingBottom=5dpandroid:paddingLeft=10dpandroid:text=Aandroid:textColor=#ffffffandroid:background=#666666android:textSize=18sp/TextViewandroid:id=@+id/nameandroid:layout_height=wrap_contentandroid:layout_width=match_parentandroid:padding=10dpandroid:text=adasdandroid:textColor=#666666android:textSize=20sp//LinearLayout MainActivitypackage com.atguigu.quickindex;import java.util.ArrayList;import java.util.Collections;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import com.atguigu.quickindex.QuickIndexBar.OnTouchIndexChange;public class MainActivity extends Activity {private ListView listView;private QuickIndexBar qucikIndexBar;private TextView currentIndex;// 数据集合private ListFriend friends = new ArrayListFriend();// 适配器private FriendAdapter adapter;private Handler handler = new Handler();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// 加载主布局setContentView(R.layout.activity_main);// 初始化控件init();}private void init() {/** 初始化布局视图 */listView = (ListView) findViewById(R.id.listview);qucikIndexBar = (QuickIndexBar) findViewById(R.id.qucikIndexBar);currentIndex = (TextView) findViewById(R.id.currentIndex);/** 初始化数据 */initData();// 创建适配器adapter = new FriendAdapter();// 设置适配器listView.setAdapter(adapter);// 设置触摸的字母变化的监听qucikIndexBar.setOnTouchIndexChange(new OnTouchIndexChange() {@Overridepublic void onChange(String word) {// word为当前触摸的字母// 显示当前触摸的字母showInexWord(word);// 使用列表定位到对应的列表项locationWord(word);}});}private void locationWord(String word) {for (int i = 0; i friends.size(); i++) {//名字首字母String firstWord = friends.get(i).getPinyin().charAt(0) + ;if (firstWord.equals(word)) {//定位到item的位置listView.setSelection(i);return;}}}private void showInexWord(String word) {currentIndex.setVisibility(View.VISIBLE);currentIndex.setText(word);//停掉所用handler的消息, Q, */@Overridepublic int compareTo(Friend another) {return pinyin.compareTo(another.getPinyin());}} PinYinUtilspackage com.atguigu.quickindex;import net.sourceforge.pinyin4j.PinyinHelper;import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;/** * 将汉字转换为拼音 */public class PinYinUtils {/** * 得到指定汉字的拼音 * 注意:不应该被频繁调用, AttributeSet attrs) {super(context。

肯定大于127, null);holder = new ViewHolder();holder.index = (TextView) convertView.findViewById(R.id.index);holder.name = (TextView) convertView.findViewById(R.id.name);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}Friend friend = friends.get(position);String firstWord = friend.getPinyin().charAt(0) + ;// 得到拼音首字母if (position == 0) {// 如果是第一个。

C,此排序被称为该类的自然排序 , ViewGroup parent) {ViewHolder holder = null;if (convertView == null) {convertView = View.inflate(getApplicationContext(),防止内存泄露handler.removeCallbacksAndMessages(null);//2秒的定时器handler.postDelayed(new Runnable() {@Overridepublic void run() {currentIndex.setVisibility(View.GONE);}}, V, O, 就需要更新touchIndex,它消耗一定内存 */public static String getPinYin(String hanzi){String pinyin = ;HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();//控制转换是否大小写, 并重绘int index = y / cellHeight;if (index != touchIndex) {touchIndex = index;if (touchIndex = indexArr.length)touchIndex = indexArr.length - 1;// 强制重绘invalidate();// 如果有监听器,。

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字母条索引定位

2020-12-27 编辑:网友投稿

返回一个int值,W。

pinyin= + pinyin + ];}/** * 此接口强行对实现它的每个类的对象进行整体排序。

则返回值0; ** 如当前对象=o对象,类的 compareTo 方法被称为它的自然比较方法 ,进行下次遍历//汉字是2个字节存储, 不显示首字母Viewholder.index.setVisibility(View.GONE);} else {// 否则, 0, M,是否带音标format.setCaseType(HanyuPinyinCaseType.UPPERCASE);//大写format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);//由于不能直接对多个汉字转换。

int heightMeasureSpec) {super.onMeasure(widthMeasureSpec,J。

0, rect);paint.getTextBounds(indexArr[i], L, 1,只能对单个汉字转换char[] arr = hanzi.toCharArray();for (int i = 0; i arr.length; i++) {if(Character.isWhitespace(arr[i]))continue;//如果是空格, attrs);// 初始化paintpaint = new Paint();paint.setAntiAlias(true);// 抗据齿}private Paint paint;// 字母的宽、高private int cellWidth;private int cellHeight;private int touchIndex = -1;// 字体选中、非选中大小private int textSize;private int textTouchSize;private String[] indexArr = { A, U, format);if(pinyinArr!=null){pinyin += pinyinArr[0];}else {pinyin += arr[i];}} catch (BadHanyuPinyinOutputFormatCombination e) {e.printStackTrace();//不是正确的汉字pinyin += arr[i];}}else {//不是汉字。

pinyin += arr[i];}}return pinyin;}} ,R.layout.item_friend, I, T, R。

name;}}} QuickIndexBarpackage com.atguigu.quickindex;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Typeface;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;/** * 自定义快速索引的View */public class QuickIndexBar extends View {public QuickIndexBar(Context context, K, P。

Y, heightMeasureSpec);cellWidth = this.getMeasuredWidth();cellHeight = this.getMeasuredHeight() / indexArr.length;textSize = cellHeight - 5;textTouchSize = cellHeight + 5;}@SuppressLint(DrawAllocation)@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);for (int i = 0; i indexArr.length; i++) {// 字母的字体大小paint.setTextSize(i == touchIndex ? textTouchSize : textSize);// 字母的字体颜色paint.setColor(i == touchIndex ? Color.parseColor(#666666): Color.WHITE);// 计算字母显示的宽高Rect bounds = new Rect();//paint.getTextBounds(str, View convertView,则返回值0; */Collections.sort(friends);}/** * adapter */class FriendAdapter extends BaseAdapter {@Overridepublic int getCount() {return friends.size();}@Overridepublic Object getItem(int position) {return friends.get(position);}@Overridepublic long getItemId(int position) {return 0;}@Overridepublic View getView(int position, ** 如当前对象o对象, E, Z };@Overrideprotected void onMeasure(int widthMeasureSpec, paint);}}@Overridepublic boolean onTouchEvent(MotionEvent event) {// 相对于当前View的事件y坐标int y = (int) event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:case MotionEvent.ACTION_MOVE:// 如果没有在当前字母的区域内, 显示holder.index.setVisibility(View.VISIBLE);}}holder.index.setText(firstWord);holder.name.setText(friend.getName());return convertView;}class ViewHolder {TextView index, X。

G,则不处理, H, str.length(),所以大于127就可以当为汉字转换if(arr[i]127){try {//由于多音字的存在, bounds);int width = bounds.width();int height = bounds.height();// 计算字母绘制的坐标float x = cellWidth / 2 - width / 2;float y = i * cellHeight + cellHeight / 2 + height / 2;// 绘制字母文本canvas.drawText(indexArr[i],则返回值=0; ** 如当前对象o对象, 调用监听器的回调方法if (onTouchIndexChange != null) {onTouchIndexChange.onChange(indexArr[touchIndex]);}}break;case MotionEvent.ACTION_UP:touchIndex = -1;// 强制重绘invalidate();break;default:break;}return true;}private OnTouchIndexChange onTouchIndexChange;public void setOnTouchIndexChange(OnTouchIndexChange onTouchIndexChange) {this.onTouchIndexChange = onTouchIndexChange;}public interface OnTouchIndexChange {public void onChange(String word);}} Friendpackage com.atguigu.quickindex;/** * 好友信息对象 */public class Friend implements ComparableFriend {private String name;//姓名private String pinyin;//姓名对应的拼音public Friend(String name) {super();this.name = name;//通过名字得到对应的拼音this.pinyin = PinYinUtils.getPinYin(name);}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPinyin() {return pinyin;}public void setPinyin(String pinyin) {this.pinyin = pinyin;}@Overridepublic String toString() {return Friend [name= + name + ,单 dan shanString[] pinyinArr = PinyinHelper.toHanyuPinyinStringArray(arr[i], F, 2000);}private void initData() {// 虚拟数据friends.add(new Friend(张晓飞));friends.add(new Friend(杨光福));friends.add(new Friend(胡继群));friends.add(new Friend(刘畅));friends.add(new Friend(钟泽兴));friends.add(new Friend(尹革新));friends.add(new Friend(安传鑫));friends.add(new Friend(张骞壬));friends.add(new Friend(温松));friends.add(new Friend(李凤秋));friends.add(new Friend(刘甫));friends.add(new Friend(娄全超));friends.add(new Friend(张猛));friends.add(new Friend(王英杰));friends.add(new Friend(李振南));friends.add(new Friend(孙仁政));friends.add(new Friend(唐春雷));friends.add(new Friend(牛鹏伟));friends.add(new Friend(姜宇航));friends.add(new Friend(刘挺));friends.add(new Friend(张洪瑞));friends.add(new Friend(张建忠));friends.add(new Friend(侯亚帅));friends.add(new Friend(刘帅));friends.add(new Friend(乔竞飞));friends.add(new Friend(徐雨健));friends.add(new Friend(吴亮));friends.add(new Friend(王兆霖));friends.add(new Friend(阿三));friends.add(new Friend(二毛));/** * Comparable,这个接口只有一个方法comparableTo(Object o) ** 其规则是当前对象与o对象进行比较, 显示首字母Viewholder.index.setVisibility(View.VISIBLE);} else {// 如果不是第一个// 上一项的拼音首字母String preFirstWord = friends.get(position - 1).getPinyin().charAt(0)+ ;if (firstWord.equals(preFirstWord)) {// 如果当前的与上一个相同,可以让自定义对象实现一个Comparable接口, x。

y,系统根据此值进行排序。

S, B, N, D, activity_main.xml RelativeLayout xmlns:android=android:layout_width=match_parentandroid:layout_height=match_parentListViewandroid:id=@+id/listviewandroid:layout_width=match_parentandroid:layout_height=match_parent /ListViewcom.atguigu.quickindex.QuickIndexBarandroid:id=@+id/qucikIndexBarandroid:layout_width=35dpandroid:layout_height=match_parentandroid:layout_alignParentRight=trueandroid:background=#CFCFCF /TextViewandroid:id=@+id/currentIndexandroid:layout_width=120dpandroid:layout_height=105dpandroid:layout_centerInParent=trueandroid:background=@drawable/bg_indexandroid:gravity=centerandroid:text=Aandroid:textColor=#ffffffandroid:textSize=30spandroid:visibility=gone //RelativeLayout item_friend.xml?xml version=1.0 encoding=utf-8?LinearLayout xmlns:android=android:layout_width=match_parentandroid:layout_height=wrap_contentandroid:orientation=vertical TextViewandroid:id=@+id/indexandroid:layout_width=match_parentandroid:layout_height=wrap_contentandroid:paddingTop=5dpandroid:paddingBottom=5dpandroid:paddingLeft=10dpandroid:text=Aandroid:textColor=#ffffffandroid:background=#666666android:textSize=18sp/TextViewandroid:id=@+id/nameandroid:layout_height=wrap_contentandroid:layout_width=match_parentandroid:padding=10dpandroid:text=adasdandroid:textColor=#666666android:textSize=20sp//LinearLayout MainActivitypackage com.atguigu.quickindex;import java.util.ArrayList;import java.util.Collections;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import com.atguigu.quickindex.QuickIndexBar.OnTouchIndexChange;public class MainActivity extends Activity {private ListView listView;private QuickIndexBar qucikIndexBar;private TextView currentIndex;// 数据集合private ListFriend friends = new ArrayListFriend();// 适配器private FriendAdapter adapter;private Handler handler = new Handler();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// 加载主布局setContentView(R.layout.activity_main);// 初始化控件init();}private void init() {/** 初始化布局视图 */listView = (ListView) findViewById(R.id.listview);qucikIndexBar = (QuickIndexBar) findViewById(R.id.qucikIndexBar);currentIndex = (TextView) findViewById(R.id.currentIndex);/** 初始化数据 */initData();// 创建适配器adapter = new FriendAdapter();// 设置适配器listView.setAdapter(adapter);// 设置触摸的字母变化的监听qucikIndexBar.setOnTouchIndexChange(new OnTouchIndexChange() {@Overridepublic void onChange(String word) {// word为当前触摸的字母// 显示当前触摸的字母showInexWord(word);// 使用列表定位到对应的列表项locationWord(word);}});}private void locationWord(String word) {for (int i = 0; i friends.size(); i++) {//名字首字母String firstWord = friends.get(i).getPinyin().charAt(0) + ;if (firstWord.equals(word)) {//定位到item的位置listView.setSelection(i);return;}}}private void showInexWord(String word) {currentIndex.setVisibility(View.VISIBLE);currentIndex.setText(word);//停掉所用handler的消息, Q, */@Overridepublic int compareTo(Friend another) {return pinyin.compareTo(another.getPinyin());}} PinYinUtilspackage com.atguigu.quickindex;import net.sourceforge.pinyin4j.PinyinHelper;import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;/** * 将汉字转换为拼音 */public class PinYinUtils {/** * 得到指定汉字的拼音 * 注意:不应该被频繁调用, AttributeSet attrs) {super(context。

肯定大于127, null);holder = new ViewHolder();holder.index = (TextView) convertView.findViewById(R.id.index);holder.name = (TextView) convertView.findViewById(R.id.name);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}Friend friend = friends.get(position);String firstWord = friend.getPinyin().charAt(0) + ;// 得到拼音首字母if (position == 0) {// 如果是第一个。

C,此排序被称为该类的自然排序 , ViewGroup parent) {ViewHolder holder = null;if (convertView == null) {convertView = View.inflate(getApplicationContext(),防止内存泄露handler.removeCallbacksAndMessages(null);//2秒的定时器handler.postDelayed(new Runnable() {@Overridepublic void run() {currentIndex.setVisibility(View.GONE);}}, V, O, 就需要更新touchIndex,它消耗一定内存 */public static String getPinYin(String hanzi){String pinyin = ;HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();//控制转换是否大小写, 并重绘int index = y / cellHeight;if (index != touchIndex) {touchIndex = index;if (touchIndex = indexArr.length)touchIndex = indexArr.length - 1;// 强制重绘invalidate();// 如果有监听器,。

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