仿微信、QQ的@功能

仿微信、QQ的@功能

前言：前一段时间，公司有一个项目需要加入@功能，我当时也没有啥思路，然后去网上看看有没有前人写过类似的文章或者代码。然后我在这里http://download.csdn.net/detail/u011818090/8534377找到了别人写的仿微博的@功能，感觉还可以，但是和我的需求不一样，所以就自己根据需求改编了他的代码。下面就讲讲我的@功能。
首先是需求：公司项目需求的中心思想是，你在群组聊天时，@群组中的某一个人，这个人接受到@信息，会在会话列表有标红提示，其他人接收到信息就是一个普通消息。我的当时遇到的问题就是这个，该如何让被@的人接收到信息有标红提醒。还有就是有一个非常让人难受的数据文档（格式如下所示）当时有两个方案：第一，根据名字来标记；第二，根据名字和用户Id来标记。然后再分析下：第一个方案，名字没有唯一性。所以第一个方案被排除了（排除过程很痛苦，其中经历了很多艰难的想法和尝试，就是因为这个奇葩的文档数据格式）；然后是第二个方案，id有唯一性并且还可以将文档中的id填上，也可以判断content字段里面的内容是@信息还是一个普通的@文本信息。但是如何实现呢？

大家都用过微信表情吧，他内部其实是一个表情对应一个特定的字符串，我就想，为什么这个不可以呢，一个名字里面包含了名字和Id。主要思路是运用正则的方式用一张图片去替代特定格式的字符串。下面上代码。

 //设置@图片和文字混搭    public static CharSequence getExpressionString(Context context, String srcText,DynamicDrawableSpan drawableSpan){        SpannableStringBuilder builder = new SpannableStringBuilder();        builder.append(srcText);  //srcText是拼接好的字符串        String text = builder.toString();        Pattern pattern = Pattern.compile("\\[2f(.*?)\\]"); //这是一个约定好的正则字符串        Matcher matcher = pattern.matcher(text);        String atStr,atIndex;        SpannableString spannable;        int index = 0;        while(matcher.find()){            atIndex = matcher.group(1);//找到正则表达式中的括号（）内匹配的字符串            atStr = "[2f" + atIndex + "]";            index = matcher.start(1) - 3; //得到括号内匹配的起始坐标            spannable = new SpannableString(atStr);            spannable.setSpan(drawableSpan, 0, spannable.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);            builder.replace(index, index + atStr.length(), spannable);        }        return builder;    }

上面的方法是将一个原始的拼接成特定字符串的drawableSpan进行正则替换成一个名字图片。
下面是将name和Id拼成特定字符创的代码

/**     * 拼接@和姓名     * @param userName     * @param userId     */    private void spilecName(String userName, String userId) {        int currentIndex = editText.getSelectionStart();  //获得光标的起始位置        String nameStr = "[2f" + userName + "/" + userId + "]";        //通过输入的@符号进入好友列表并返回@的人，删除之前的@        editText.getText().replace(currentIndex - 1,currentIndex,"");        setAtImageSpan(nameStr,userName);    }

可以看到我将name和Id拼接成String nameStr = "[2f" + userName + "/" + userId + "]"; 这种形式，然后用Pattern pattern = Pattern.compile("\\[2f(.*?)\\]")进行正则表达式匹配。下面是将文字信息转成图片信息

/**     * 将@的信息转化成图片     * @param nameStr     * @param name     */    private void setAtImageSpan(String nameStr, String name) {        Editable eidit_text = editText.getEditableText();        if (null != name){            String name1 = "@" + name + " ";  //后面加一个空格为了与之后拼接的文字隔开            if (null != name1 && name1.trim().length() > 0){                final Bitmap bmp = getNameBitmap(name1);                DynamicDrawableSpan drawableSpan = new DynamicDrawableSpan(DynamicDrawableSpan.ALIGN_BASELINE) {                    @Override                    public Drawable getDrawable() {                        BitmapDrawable drawable = new BitmapDrawable(getResources(),bmp);                        drawable.setBounds(0,0,                                            bmp.getWidth(),                                            bmp.getHeight());                        return drawable;                    }                };                CharSequence cs = getExpressionString(AtActivity.this, nameStr, drawableSpan);                builder = new SpannableStringBuilder(cs);                //获取光标所在位置                currentIndex = editText.getSelectionStart();                builder.setSpan(builder,0, builder.length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);            }        }        if (currentIndex < 0 || currentIndex >= eidit_text.length()) {            eidit_text.append(builder);        } else {            eidit_text.insert(currentIndex, builder);        }    }    /**     * 将文字转成图片     * @param name     * @return     */    private Bitmap getNameBitmap(String name) {        Paint paint = new Paint();        paint.setColor(getResources().getColor(R.color.black));        paint.setAntiAlias(true);        paint.setTextSize(DensityUtils.dp2px(AtActivity.this,18));        Rect rect = new Rect();        paint.getTextBounds(name,0,name.length(),rect);        //获得字符串在屏幕上的长度        int width = (int) (paint.measureText(name));        final Bitmap bmp = Bitmap.createBitmap(width,rect.height() + 8, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bmp);        Paint.FontMetricsInt fontMetrics = paint.getFontMetricsInt();        //(行高-字体高度)/2+字体高度-6        float fontTotalHeight = fontMetrics.bottom - fontMetrics.top;        //  canvas.drawText(name, rect.left, rect.height() - rect.bottom, paint);        float offY = fontTotalHeight / 2;        float newY = rect.height() / 2 + offY;        canvas.drawText(name, rect.left, newY - 4, paint);        return bmp;    }

通过以上的处理，就能够将name和Id信息存进一张@的图片中了。接收方通过解析@信息的内容，判断该内容中是否有自己的Id，然后系统再进行相应的处理。

大致的思路就写完了，一些简单的逻辑，大家可以看我上面给的链接的代码。或者看我下面的附上的整个代码。我的代码中还加入了群员名字的搜索功能，搜索的关键字标红处理。附上代码如下：

说明：代码只是简单的写了发送方的@功能信息，并没有实际的聊天功能（聊天比较复杂）。如果各位有做即时聊天的需要@功能的，希望我这个思路能对大家有所帮助。
AtActivity代码：

package com.example.hhly_pc.enumuse;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.annotation.Nullable;import android.support.v4.graphics.BitmapCompat;import android.support.v7.app.AppCompatActivity;import android.text.Editable;import android.text.InputFilter;import android.text.Spannable;import android.text.SpannableString;import android.text.SpannableStringBuilder;import android.text.Spanned;import android.text.style.DynamicDrawableSpan;import android.widget.EditText;import android.widget.Toast;import com.example.hhly_pc.enumuse.adapter.AppMannager;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * Created by hhly-pc on 2017/1/21. */public class AtActivity extends AppCompatActivity {    private static int a = 0;    private EditText editText;    private int currentIndex;    private SpannableStringBuilder builder;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_at);        editText = (EditText) findViewById(R.id.et_at);        //文本编辑框文字筛选        editText.setFilters(new InputFilter[]{new MyInputFilter()});    }    private class MyInputFilter implements InputFilter{        @Override        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {           if (source.toString().equalsIgnoreCase("@") || source.toString().equalsIgnoreCase("＠")){               goAt();           }            return source;        }    }    //匹配到@字符之后进入用户选择界面    private void goAt() {        startActivityForResult(new Intent(this,PersionListActivity.class),100);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == 100 && resultCode == 200){            String userId = data.getStringExtra("userId");            String userName = data.getStringExtra("userName");            System.out.println("userName111    "  + userName + "  userId  " + userId);            spilecName(userName,userId);        }    }    /**     * 拼接@和姓名     * @param userName     * @param userId     */    private void spilecName(String userName, String userId) {        int currentIndex = editText.getSelectionStart();  //获得光标的起始位置        String nameStr = "[2f" + userName + "/" + userId + "]";        //通过输入的@符号进入好友列表并返回@的人，删除之前的@        editText.getText().replace(currentIndex - 1,currentIndex,"");        setAtImageSpan(nameStr,userName);    }    /**     * 将@的信息转化成图片     * @param nameStr     * @param name     */    private void setAtImageSpan(String nameStr, String name) {        Editable eidit_text = editText.getEditableText();        if (null != name){            String name1 = "@" + name + " ";  //后面加一个空格为了与之后拼接的文字隔开            if (null != name1 && name1.trim().length() > 0){                final Bitmap bmp = getNameBitmap(name1);                DynamicDrawableSpan drawableSpan = new DynamicDrawableSpan(DynamicDrawableSpan.ALIGN_BASELINE) {                    @Override                    public Drawable getDrawable() {                        BitmapDrawable drawable = new BitmapDrawable(getResources(),bmp);                        drawable.setBounds(0,0,                                            bmp.getWidth(),                                            bmp.getHeight());                        return drawable;                    }                };                CharSequence cs = getExpressionString(AtActivity.this, nameStr, drawableSpan);                builder = new SpannableStringBuilder(cs);                //获取光标所在位置                currentIndex = editText.getSelectionStart();                builder.setSpan(builder,0, builder.length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);            }        }        if (currentIndex < 0 || currentIndex >= eidit_text.length()) {            eidit_text.append(builder);        } else {            eidit_text.insert(currentIndex, builder);        }    }    /**     * 将文字转成图片     * @param name     * @return     */    private Bitmap getNameBitmap(String name) {        Paint paint = new Paint();        paint.setColor(getResources().getColor(R.color.black));        paint.setAntiAlias(true);        paint.setTextSize(DensityUtils.dp2px(AtActivity.this,18));        Rect rect = new Rect();        paint.getTextBounds(name,0,name.length(),rect);        //获得字符串在屏幕上的长度        int width = (int) (paint.measureText(name));        final Bitmap bmp = Bitmap.createBitmap(width,rect.height() + 8, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bmp);        Paint.FontMetricsInt fontMetrics = paint.getFontMetricsInt();        //(行高-字体高度)/2+字体高度-6        float fontTotalHeight = fontMetrics.bottom - fontMetrics.top;        //  canvas.drawText(name, rect.left, rect.height() - rect.bottom, paint);        float offY = fontTotalHeight / 2;        float newY = rect.height() / 2 + offY;        canvas.drawText(name, rect.left, newY - 4, paint);        return bmp;    }    //设置@图片和文字混搭    public static CharSequence getExpressionString(Context context, String srcText,DynamicDrawableSpan drawableSpan){        SpannableStringBuilder builder = new SpannableStringBuilder();        builder.append(srcText);        String text = builder.toString();        Pattern pattern = Pattern.compile("\\[2f(.*?)\\]");        Matcher matcher = pattern.matcher(text);        String atStr,atIndex;        SpannableString spannable;        int index = 0;        while(matcher.find()){            atIndex = matcher.group(1);            atStr = "[2f" + atIndex + "]";            index = matcher.start(1) - 3;            spannable = new SpannableString(atStr);            spannable.setSpan(drawableSpan, 0, spannable.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);            builder.replace(index, index + atStr.length(), spannable);        }        return builder;    }}

群员选择界面的代码PersionListActivity

package com.example.hhly_pc.enumuse;import android.app.Activity;import android.app.LoaderManager;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.SystemClock;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.text.Editable;import android.text.TextWatcher;import android.view.View;import android.view.inputmethod.InputMethodManager;import android.widget.EditText;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import com.example.hhly_pc.enumuse.adapter.BaseRecyclerViewAdapter2;import com.example.hhly_pc.enumuse.adapter.DividerItemDecoration2;import com.example.hhly_pc.enumuse.adapter.TestAdapter;import java.lang.ref.WeakReference;import java.util.ArrayList;import java.util.List;/** * Created by hhly-pc on 2017/1/21. */public class PersionListActivity extends AppCompatActivity implements View.OnClickListener{    private RecyclerView recyclerView;    private ImageView ivBack;    private ImageView ivSearch;    private TextView tv1;    private static List<Persion> datas;    private EditText editextSeach;    private static final int LIST = 0x213;    private MyHandler myHandler = new MyHandler(PersionListActivity.this);    //LoaderManager    /*private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case LIST:                    SearchContactInfo searchContactInfo = (SearchContactInfo) msg.obj;                    final List<Persion> persions = searchContactInfo.getAllConctDetailedInfo();                    adapter = new TestAdapter(persions,PersionListActivity.this);                    adapter.setSearchContent(searchContactInfo.getSearchName());                    recyclerView.setAdapter(adapter);                    adapter.notifyDataSetChanged();                    adapter.setOnRecyclerViewItemClickListener(new BaseRecyclerViewAdapter2.OnRecyclerViewItemClickListener2() {                        @Override                        public void onItemClick(View view, int position) {                            Intent intent = new Intent();                            String usetName = datas.get(position).getUsetName();                            String userId = datas.get(position).getUserId();                            intent.putExtra("usetName",usetName);                            intent.putExtra("userId",userId);                            setResult(200,intent);                            finish();                        }                    });            }        }    };*/    private TestAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);        ivBack = (ImageView) findViewById(R.id.iv_back);        ivSearch = (ImageView) findViewById(R.id.iv_search);        tv1 = (TextView) findViewById(R.id.tv_1);        editextSeach = (EditText) findViewById(R.id.editext_seach);        ivBack.setOnClickListener(this);        ivSearch.setOnClickListener(this);        intData();        LinearLayoutManager layoutManager = new LinearLayoutManager(this);        recyclerView.setLayoutManager(layoutManager);        recyclerView.addItemDecoration(new DividerItemDecoration2(this, LinearLayoutManager.VERTICAL, 1, getResources().getColor(R.color.color_itemMess_divider)));//设置item的分割线        adapter = new TestAdapter(datas,PersionListActivity.this);        recyclerView.setAdapter(adapter);        adapter.setOnRecyclerViewItemClickListener(new BaseRecyclerViewAdapter2.OnRecyclerViewItemClickListener2() {            @Override            public void onItemClick(View view, int position) {                Intent intent = new Intent();                String usetName = datas.get(position).getUsetName();                String userId = datas.get(position).getUserId();                intent.putExtra("userName",usetName);                intent.putExtra("userId",userId);                setResult(200,intent);                finish();            }        });        editextSeach.addTextChangedListener(watcher);    }    //为了防止Handler引起的内存泄漏，推荐使用一下写法  用static修饰，不会持有外部类的引用    private static class MyHandler extends Handler{        private WeakReference<PersionListActivity> weakReferenceActivity;        public MyHandler(Context context){            PersionListActivity persionListActivity = (PersionListActivity) context;            weakReferenceActivity = new WeakReference<PersionListActivity>(persionListActivity);        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            final PersionListActivity weakPersionListActivity2 = weakReferenceActivity.get();            if (weakPersionListActivity2 != null){ //如果这个虚引用为空，不进行操作，否则就进行操作                switch (msg.what) {                    case LIST:                        SearchContactInfo searchContactInfo = (SearchContactInfo) msg.obj;                        final List<Persion> persions = searchContactInfo.getAllConctDetailedInfo();                        TestAdapter adapter = new TestAdapter(persions,weakPersionListActivity2);                        adapter.setSearchContent(searchContactInfo.getSearchName());                        weakPersionListActivity2.recyclerView.setAdapter(adapter);                        adapter.notifyDataSetChanged();                        adapter.setOnRecyclerViewItemClickListener(new BaseRecyclerViewAdapter2.OnRecyclerViewItemClickListener2() {                            @Override                            public void onItemClick(View view, int position) {                                Intent intent = new Intent();                                String usetName = datas.get(position).getUsetName();                                String userId = datas.get(position).getUserId();                                intent.putExtra("userName",usetName);                                intent.putExtra("userId",userId);                                weakPersionListActivity2.setResult(200,intent);                                weakPersionListActivity2.finish();                            }                        });                }            }        }    }    //初始化数据    private void intData() {        datas = new ArrayList<>();        for (int i = 0; i < 25; i++) {            datas.add(new Persion("张三" + i,"12345" + i));        }    }    @Override    public void onClick(View v) {        int id = v.getId();        switch(id){            case R.id.iv_back:                onBackPressed();                break;            case R.id.iv_search:                tv1.setVisibility(View.GONE);                ivSearch.setVisibility(View.GONE);                editextSeach.setVisibility(View.VISIBLE);                editextSeach.requestFocus();                InputMethodManager inputMethodManager = (InputMethodManager) editextSeach.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);                inputMethodManager.showSoftInput(editextSeach,0);                break;        }    }    private TextWatcher watcher = 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) {            List<Persion> persions = searchUserNames(datas, s.toString());            SearchContactInfo searchContactInfo = new SearchContactInfo();            searchContactInfo.setAllConctDetailedInfo(persions);            searchContactInfo.setSearchName(s.toString());            Message msg = new Message();            msg.what = LIST;            msg.obj = searchContactInfo;            myHandler.sendMessage(msg);        }    };    public List<Persion> searchUserNames(List<Persion> data,String name){        ArrayList<Persion> atName = new ArrayList<>();        if (data != null && data.size() != 0){            for (Persion persion : data){                if (persion.getUsetName().contains(name)){                    atName.add(persion);                }            }        }        if (null != atName){            return atName;        }        return null;    }    @Override    protected void onDestroy() {        super.onDestroy();        myHandler.removeCallbacksAndMessages(null);    }}

还有一个非常吊的适用于recyclerView的适配器代码BaseRecyclerViewAdapter2

package com.example.hhly_pc.enumuse.adapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import com.example.hhly_pc.enumuse.BaseViewHolder;import java.util.ArrayList;import java.util.List;/** * Created by hhly-pc on 2017/1/18. */public abstract class BaseRecyclerViewAdapter2<T> extends RecyclerView.Adapter<BaseViewHolder2>{    private List<T> mData;  //准备数据    private Context mContext;    private int mLayoutResId; //页面布局的Id    private LayoutInflater mLayoutInflate;    //初始化点击监听接口    private OnRecyclerViewItemClickListener2 mOnRecyclerViewItemClickListener;    private onRecyclerViewItemLongClickListener2 mOnRecyclerViewItemLongClickListener2;    //构造函数    public BaseRecyclerViewAdapter2(List<T> mData, Context mContext, int mLayoutResId) {  //这里多对mData和mLayoutResId做判空处理        this.mData = mData == null ? new ArrayList<T>() : new ArrayList<T>(mData);        this.mContext = mContext;        if (0 != mLayoutResId){            this.mLayoutResId = mLayoutResId;        }        this.mLayoutInflate = LayoutInflater.from(mContext);    }    @Override    public void onBindViewHolder(BaseViewHolder2 holder, int position) {       conver(holder,mData.get(position));    }    @Override    public BaseViewHolder2 onCreateViewHolder(ViewGroup parent, int viewType) {        BaseViewHolder2 baseViewHolder2 = new BaseViewHolder2(mContext,mLayoutInflate.inflate(mLayoutResId,parent,false));        initItemClickListener(baseViewHolder2);        return baseViewHolder2;    }    //初始化点击事件    private void initItemClickListener(final BaseViewHolder2 holder2) {        if (mOnRecyclerViewItemClickListener != null){            holder2.itemView.setOnClickListener(new View.OnClickListener(){                @Override                public void onClick(View v) {                    mOnRecyclerViewItemClickListener.onItemClick(v,holder2.getLayoutPosition());                }            });        }        if (mOnRecyclerViewItemLongClickListener2 != null){            holder2.itemView.setOnLongClickListener(new View.OnLongClickListener(){                @Override                public boolean onLongClick(View v) {                    return mOnRecyclerViewItemLongClickListener2.onItemLongClick(v,holder2.getLayoutPosition());                }            });        }    }    @Override    public int getItemCount() {        return mData.size();    }    public void add(int position,T item){        mData.add(position,item);        notifyItemInserted(position);    }    //设置点击事件    public interface OnRecyclerViewItemClickListener2{        void onItemClick(View view, int position);    }    public void setOnRecyclerViewItemClickListener(OnRecyclerViewItemClickListener2 onRecyclerViewItemClickListener2){        this.mOnRecyclerViewItemClickListener = onRecyclerViewItemClickListener2;    }    public interface onRecyclerViewItemLongClickListener2{        public boolean onItemLongClick(View view,int position);    }    public void setOnRecyclerViewItemLongClickListener2(onRecyclerViewItemLongClickListener2 onRecyclerViewItemLongClickListener2){        this.mOnRecyclerViewItemLongClickListener2 = onRecyclerViewItemLongClickListener2;    }    protected abstract void conver(BaseViewHolder2 holder,T item);}

这个适配器的实现类TestAdapter

package com.example.hhly_pc.enumuse.adapter;import android.content.Context;import android.graphics.Color;import android.text.SpannableString;import android.text.SpannableStringBuilder;import android.text.TextUtils;import android.text.style.ForegroundColorSpan;import com.example.hhly_pc.enumuse.Persion;import com.example.hhly_pc.enumuse.R;import java.util.List;/** * Created by hhly-pc on 2017/1/18. */public class TestAdapter extends BaseRecyclerViewAdapter2<Persion> {    private String mSearchContent;    public TestAdapter(List<Persion> data,Context context){        super(data,context, R.layout.list_item);    }    @Override    protected void conver(BaseViewHolder2 holder, Persion item) {        int start = getColorString(item.getUsetName(), mSearchContent);        if (start > -1){            System.out.println("start     " + start);            SpannableStringBuilder builder = new SpannableStringBuilder(item.getUsetName());            ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED);            builder.setSpan(redSpan,start,start + mSearchContent.length(), SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);            holder.setText(R.id.tv_1,builder);        }else {            holder.setText(R.id.tv_1,item.getUsetName());        }    }    public int getColorString(String userName,String mSearchContent){        int start = -1;        if (!TextUtils.isEmpty(userName) && !TextUtils.isEmpty(mSearchContent)) {            if (userName.contains(mSearchContent)) {                start = userName.indexOf(mSearchContent);            }        }        return start;    }    public void setSearchContent(String searchContent){        this.mSearchContent = searchContent;    }}

package com.example.hhly_pc.enumuse.adapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.util.SparseArray;import android.view.View;import android.widget.TextView;/** * Created by hhly-pc on 2017/1/18. */public class BaseViewHolder2 extends RecyclerView.ViewHolder{    private Context mContext;    private final SparseArray<View> views;    public View converView;    public BaseViewHolder2(Context countext,View itemView) {        super(itemView);        this.mContext = countext;        this.views = new SparseArray<>();        converView = itemView;    }    public void setText(int viewId,CharSequence s){        TextView view = getView(viewId);        view.setText(s);    }    public <T extends View> T getView(int viewId){        View view = views.get(viewId);        if (view == null){            view = converView.findViewById(viewId);            views.put(viewId,view);        }        return (T)view;    }}

package com.example.hhly_pc.enumuse;import android.content.Context;import android.util.TypedValue;/** * 常用单位转换的辅助类 */public class DensityUtils {    private DensityUtils() {        /* cannot be instantiated */        throw new UnsupportedOperationException("cannot be instantiated");    }    /**     * dp转px     *     * @param context     * @param     * @return     */    public static int dp2px(Context context, float dpVal) {        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,                dpVal, context.getResources().getDisplayMetrics());    }    /**     * sp转px     *     * @param context     * @param     * @return     */    public static int sp2px(Context context, float spVal) {        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,                spVal, context.getResources().getDisplayMetrics());    }    /**     * px转dp     *     * @param context     * @param pxVal     * @return     */    public static float px2dp(Context context, float pxVal) {        final float scale = context.getResources().getDisplayMetrics().density;        return (pxVal / scale);    }    /**     * px转sp     *     * @param pxVal     * @return     */    public static float px2sp(Context context, float pxVal) {        return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);    }}

package com.example.hhly_pc.enumuse;import java.util.List;/** * Created by hhly-pc on 2017/1/22. */public class SearchContactInfo {    private List<Persion> allConctDetailedInfo;    private String searchName;    public List<Persion> getAllConctDetailedInfo() {        return allConctDetailedInfo;    }    public void setAllConctDetailedInfo(List<Persion> allConctDetailedInfo) {        this.allConctDetailedInfo = allConctDetailedInfo;    }    public String getSearchName() {        return searchName;    }    public void setSearchName(String searchName) {        this.searchName = searchName;    }}

结束语：菜鸟一枚，第一次写博客，估计会有很多做的不好的地方，欢迎各位看官指正（看看代码质量咋样）。然后相互交流学习。