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", "$6", "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，在这里设置显示的用户名和头像，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, parent, 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, parent, 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, top, right, bottom); mDivider.draw(c); } } @Override public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { if (mOrientation == VERTICAL_LIST) { outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); } else { outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); } }// @Override// public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {// if (mOrientation == VERTICAL_LIST){// outRect.set(0,0,0,mDivider.getIntrinsicHeight());// }else {// outRect.set(0,0,mDivider.getIntrinsicWidth(),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网站的支持！