androID studio实现微信好友列表功能，注意有一个jar包我没有放上来，请大家到MainActivity中的那个网址里面下载即可，然后把pinyin4j-2.5.0.jar@H_502_2@复制粘贴到项目的app/libs文件夹里面，然后clean项目就可以使用了
实现效果图：
（1）在build.gradle中引用第三方的类库
compile 'com.androID.support:recyclervIEw-v7:26.0.0-Alpha1'compile files('libs/pinyin4j-2.5.0.jar')（2）在MainActivity：
public class MainActivity extends AppCompatActivity { //参考网址：https://github.com/JanecineJohn/WeChatList private RecyclerVIEw contactList; private String[] contactnames; private linearlayoutmanager layoutManager; private LetterVIEw letterVIEw; private ContactAdapter adapter; @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.activity_main); contactnames = new String[] {"安然","奥兹","德玛","张三丰","郭靖","黄蓉","黄老邪","赵敏","123","天山童姥","任我行","于万亭","陈家洛","韦小宝","","穆人清","陈圆圆","郭芙","郭襄","穆念慈","东方不败","梅超风","林平之","林远图","灭绝师太","段誉","鸠摩智"}; contactList = (RecyclerVIEw) findVIEwByID(R.ID.contact_List); letterVIEw = (LetterVIEw) findVIEwByID(R.ID.letter_vIEw); layoutManager = new linearlayoutmanager(this); adapter = new ContactAdapter(this,contactnames); contactList.setLayoutManager(layoutManager); contactList.addItemdecoration(new divIDerItemdecoration(this,divIDerItemdecoration.VERTICAL_List)); contactList.setAdapter(adapter); letterVIEw.setCharacterListener(new LetterVIEw.CharacterClickListener() { @OverrIDe public voID clickCharacter(String character) { layoutManager.scrollTopositionWithOffset(adapter.getScrollposition(character),0); } @OverrIDe public voID clickArrow() { layoutManager.scrollTopositionWithOffset(0,0); } }); }}（3）Contact类public class Contact implements Serializable { private String mname; private int mType; public Contact(String name,int type) { mname = name; mType = type; } public String getmname() { return mname; } public int getmType() { return mType; }}（3）ListvIEw好友列表适配器，在这里设置显示的@R_301_6964@和头像，并且添加点击事件 ContactAdapter
public class ContactAdapter extends RecyclerVIEw.Adapter<RecyclerVIEw.VIEwHolder>{ private LayoutInflater mLayoutInflater; private Context mContext; private String[] mContactnames; // 联系人名称字符串数组 private List<String> mContactList; // 联系人名称List（转换成拼音） private List<Contact> resultList; // 最终结果（包含分组的字母） private List<String> characterList; // 字母List public enum ITEM_TYPE { ITEM_TYPE_CHaraCTER,ITEM_TYPE_CONTACT } public ContactAdapter(Context context,String[] contactnames) { mContext = context; mLayoutInflater = LayoutInflater.from(context); mContactnames = contactnames; handleContact(); } private voID handleContact() { mContactList = new ArrayList<>(); Map<String,String> map = new HashMap<>(); for (int i = 0; i < mContactnames.length; i++) { String pinyin = Utils.getPingYin(mContactnames[i]); map.put(pinyin,mContactnames[i]); mContactList.add(pinyin); } Collections.sort(mContactList,new ContactComparator()); resultList = new ArrayList<>(); characterList = new ArrayList<>(); for (int i = 0; i < mContactList.size(); i++) { String name = mContactList.get(i); String character = (name.charat(0) + "").toupperCase(Locale.ENGliSH); if (!characterList.contains(character)) { if (character.hashCode() >= "A".hashCode() && character.hashCode() <= "Z".hashCode()) { // 是字母 characterList.add(character); resultList.add(new Contact(character,ITEM_TYPE.ITEM_TYPE_CHaraCTER.ordinal())); } else { if (!characterList.contains("#")) { characterList.add("#"); resultList.add(new Contact("#",ITEM_TYPE.ITEM_TYPE_CHaraCTER.ordinal())); } } } resultList.add(new Contact(map.get(name),ITEM_TYPE.ITEM_TYPE_CONTACT.ordinal())); } } @OverrIDe public RecyclerVIEw.VIEwHolder onCreateVIEwHolder(VIEwGroup parent,int vIEwType) { if (vIEwType == ITEM_TYPE.ITEM_TYPE_CHaraCTER.ordinal()) { return new CharacterHolder(mLayoutInflater.inflate(R.layout.item_character,parent,false)); } else { return new ContactHolder(mLayoutInflater.inflate(R.layout.item_contact,false)); } } @OverrIDe public voID onBindVIEwHolder(RecyclerVIEw.VIEwHolder holder,int position) { if (holder instanceof CharacterHolder) { ((CharacterHolder) holder).mTextVIEw.setText(resultList.get(position).getmname()); } else if (holder instanceof ContactHolder) { ((ContactHolder) holder).mTextVIEw.setText(resultList.get(position).getmname()); } } @OverrIDe public int getItemVIEwType(int position) { return resultList.get(position).getmType(); } @OverrIDe public int getItemCount() { return resultList == null ? 0 : resultList.size(); } public class CharacterHolder extends RecyclerVIEw.VIEwHolder { TextVIEw mTextVIEw; CharacterHolder(VIEw vIEw) { super(vIEw); mTextVIEw = (TextVIEw) vIEw.findVIEwByID(R.ID.character); } } public class ContactHolder extends RecyclerVIEw.VIEwHolder { TextVIEw mTextVIEw; ContactHolder(VIEw vIEw) { super(vIEw); mTextVIEw = (TextVIEw) vIEw.findVIEwByID(R.ID.contact_name); } } public int getScrollposition(String character) { if (characterList.contains(character)) { for (int i = 0; i < resultList.size(); i++) { if (resultList.get(i).getmname().equals(character)) { return i; } } } return -1; // -1不会滑动 }}（4）ContactComparator 做英文字母的判断
public class ContactComparator implements Comparator<String> { @OverrIDe public int compare(String o1,String o2) { int c1 = (o1.charat(0) + "").toupperCase().hashCode(); int c2 = (o2.charat(0) + "").toupperCase().hashCode(); boolean c1Flag = (c1 < "A".hashCode() || c1 > "Z".hashCode()); // 不是字母 boolean c2Flag = (c2 < "A".hashCode() || c2 > "Z".hashCode()); // 不是字母 if (c1Flag && !c2Flag) { return 1; } else if (!c1Flag && c2Flag) { return -1; } return c1 - c2; }}（5）divIDerItemdecoration
public class divIDerItemdecoration extends RecyclerVIEw.Itemdecoration { private static final int[] ATTRS = new int[]{ androID.R.attr.ListdivIDer }; public static final int HORIZONTAL_List = linearlayoutmanager.HORIZONTAL; public static final int VERTICAL_List = linearlayoutmanager.VERTICAL; private Drawable mdivIDer; private int mOrIEntation; public divIDerItemdecoration(Context context,int orIEntation) { final TypedArray a = context.obtainStyledAttributes(ATTRS); mdivIDer = a.getDrawable(0); a.recycle(); setorIEntation(orIEntation); } private voID setorIEntation(int orIEntation) { if (orIEntation != HORIZONTAL_List && orIEntation != VERTICAL_List) { throw new IllegalArgumentException("invalID orIEntation"); } mOrIEntation = orIEntation; } @OverrIDe public voID onDraw(Canvas c,RecyclerVIEw parent) { if (mOrIEntation == VERTICAL_List) { drawVertical(c,parent); } else { drawHorizontal(c,parent); } }// @OverrIDe// public voID onDraw(Canvas c,RecyclerVIEw parent,RecyclerVIEw.State state) {// //super.onDraw(c,state);// if (mOrIEntation == VERTICAL_List) {// drawVertical(c,parent);// } else {// drawHorizontal(c,parent);// }// } public voID drawVertical(Canvas c,RecyclerVIEw parent) { final int left = parent.getpaddingleft(); final int right = parent.getWIDth() - parent.getpaddingRight(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final VIEw child = parent.getChildAt(i); final RecyclerVIEw.LayoutParams params = (RecyclerVIEw.LayoutParams) child .getLayoutParams(); final int top = child.getBottom() + params.bottommargin + Math.round(VIEwCompat.getTranslationY(child)); final int bottom = top + mdivIDer.getIntrinsicHeight(); mdivIDer.setBounds(left,top,right,bottom); mdivIDer.draw(c); } } public voID drawHorizontal(Canvas c,RecyclerVIEw parent) { final int top = parent.getpaddingtop(); final int bottom = parent.getHeight() - parent.getpaddingBottom(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final VIEw child = parent.getChildAt(i); final RecyclerVIEw.LayoutParams params = (RecyclerVIEw.LayoutParams) child .getLayoutParams(); final int left = child.getRight() + params.rightmargin + Math.round(VIEwCompat.getTranslationX(child)); final int right = left + mdivIDer.getIntrinsicHeight(); mdivIDer.setBounds(left,bottom); mdivIDer.draw(c); } } @OverrIDe public voID getItemOffsets(Rect outRect,int itemposition,RecyclerVIEw parent) { if (mOrIEntation == VERTICAL_List) { outRect.set(0,mdivIDer.getIntrinsicHeight()); } else { outRect.set(0,mdivIDer.getIntrinsicWIDth(),0); } }// @OverrIDe// public voID getItemOffsets(Rect outRect,VIEw vIEw,RecyclerVIEw.State state) {// if (mOrIEntation == VERTICAL_List){// outRect.set(0,mdivIDer.getIntrinsicHeight());// }else {// outRect.set(0,0);// }// }}（6）LetterVIEw
public class LetterVIEw extends linearLayout{ private Context mContext; private CharacterClickListener mListener; public LetterVIEw(Context context,AttributeSet attrs) { super(context,attrs); mContext = context;//接收传进来的上下文 setorIEntation(VERTICAL); initVIEw(); } private voID initVIEw(){ addVIEw(buildImageLayout()); for (char i = 'A';i<='Z';i++){ final String character = i + ""; TextVIEw tv = buildTextLayout(character); addVIEw(tv); } addVIEw(buildTextLayout("#")); } private TextVIEw buildTextLayout(final String character){ linearLayout.LayoutParams layoutParams = new linearLayout.LayoutParams(VIEwGroup.LayoutParams.MATCH_PARENT,VIEwGroup.LayoutParams.MATCH_PARENT,1); TextVIEw tv = new TextVIEw(mContext); tv.setLayoutParams(layoutParams); tv.setGravity(Gravity.CENTER); tv.setClickable(true); tv.setText(character); tv.setonClickListener(new OnClickListener() { @OverrIDe public voID onClick(VIEw vIEw) { if (mListener != null){ mListener.clickCharacter(character); } } }); return tv; } private ImageVIEw buildImageLayout() { linearLayout.LayoutParams layoutParams = new linearLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT,1); ImageVIEw iv = new ImageVIEw(mContext); iv.setLayoutParams(layoutParams); iv.setBackgroundResource(R.mipmap.ic_launcher); iv.setonClickListener(new OnClickListener() { @OverrIDe public voID onClick(VIEw v) { if (mListener != null) { mListener.clickArrow(); } } }); return iv; } public voID setCharacterListener(CharacterClickListener Listener) { mListener = Listener; } public interface CharacterClickListener { voID clickCharacter(String character); voID clickArrow(); }}（7）Utils
public class Utils { public static String getPingYin(String inputString) { HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat(); format.setCaseType(HanyuPinyinCaseType.LOWERCASE); format.setToneType(HanyuPinyinToneType.WITHOUT_TONE); format.setVCharType(HanyuPinyinVCharType.WITH_V); char[] input = inputString.trim().tochararray(); String output = ""; try { for (char curchar : input) { if (java.lang.Character.toString(curchar).matches("[\u4E00-\u9FA5]+")) { String[] temp = PinyinHelper.toHanyuPinyinStringArray(curchar,format); output += temp[0]; } else { output += java.lang.Character.toString(curchar); } } } catch (BadHanyuPinyinOutputFormatCombination e) { e.printstacktrace(); } return output; }}总结
以上所述是小编给大家介绍的androID仿微信好友列表，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持！
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