allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

dependencies {
	        compile 'com.github.nanchen2251:WaveSideBar:1.0.6'
	}

  <!--搜索框-->
  <com.nanchen.wavesidebar.SearchEditText
        android:id="@+id/main_search"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="5dp"
        android:background="@drawable/search_edit_bg"
        android:drawableLeft="@mipmap/icon_search"
        android:drawablePadding="5dp"
        android:drawableStart="@mipmap/icon_search"
        android:gravity="center_vertical"
        android:hint="@string/search"
        android:imeOptions="actionSearch"
        android:maxLines="1"
        android:padding="5dp"
        android:textSize="16sp"
        app:drawableDel="@mipmap/edit_delete"/>
	
	
  <!--字母导航栏-->
  <com.nanchen.wavesidebar.WaveSideBarView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="8dp"
        android:id="@+id/main_side_bar"
        app:sidebar_text_color="@color/colorAccent"
        app:sidebar_lazy_respond="false"/>

    mWaveSideBarView = (WaveSideBarView) findViewById(R.id.main_side_bar);
    mWaveSideBarView.setOnSelectIndexItemListener(new OnSelectIndexItemListener() {
        @Override
        public void onSelectIndexItem(String letter) {
            for (int i=0; i<mContactModels.size(); i++) {
                if (mContactModels.get(i).getIndex().equals(letter)) {
                    ((LinearLayoutManager) mRecyclerView.getLayoutManager()).scrollToPositionWithOffset(i, 0);
                    return;
                }
            }
        }
    });
    
    // 搜索按钮相关
        mSearchEditText = (SearchEditText) findViewById(R.id.main_search);
        mSearchEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
	        //You can do something in there
                mShowModels.clear();
                for (ContactModel model : mContactModels) {
                    String str = Trans2PinYinUtil.trans2PinYin(model.getName());
                    if (str.contains(s.toString())|| model.getName().contains(s.toString())) {
                        mShowModels.add(model);
                    }
                }
                mAdapter.notifyDataSetChanged();
            }
        });

FirstLetterUtil.getFirstLetter(name);

Trans2PinYinUtil.trans2PinYin(String name);