搜索功能

原创 于 2018-05-03 20:03:54 发布 · 178 阅读 · 1 ·
CC 4.0 BY-SA版权
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自定义view

package com.example.administrator.yizhoukao;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Created by Administrator on 2018/4/16 0016.
 */

public class MyView extends LinearLayout {

    private EditText et_shop;
    private int color;

    public MyView(Context context) {
        this(context,null);
    }

    public MyView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public MyView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context,attrs);
    }

    public String getEt_shop() {
        return et_shop.getText().toString().trim();
    }

    public void setEt_shop(String et) {
        et_shop.setText(et);
        et_shop.setTextColor(color);
    }

    //自定义接口
    public interface OnMyViewClickListener{
        void onClickListener(View v);
}
private OnMyViewClickListener onMyViewClickListener;
    public void setOnMyViewClickListener(OnMyViewClickListener onMyViewClickListener){
        this.onMyViewClickListener=onMyViewClickListener;
    }
    private void initView(Context context,AttributeSet attrs) {

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyView);
        color = a.getColor(R.styleable.MyView_tv_color, Color.BLACK);


        View view = View.inflate(context, R.layout.myview, this);
        et_shop = view.findViewById(R.id.et_shop);
        TextView sou = view.findViewById(R.id.sou);
        sou.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(onMyViewClickListener!=null){
                    onMyViewClickListener.onClickListener(view);
                }
            }
        });


    }
}

自定义MyViewGroup
package com.example.administrator.yizhoukao;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2018/4/16 0016.
 */

public class MyViewGroup extends ViewGroup {

    //存储所有子View
    private List<List<View>> mAllChildViews = new ArrayList<>();
    //每一行的高度
    private List<Integer> mLineHeight = new ArrayList<>();

    public MyViewGroup(Context context) {
        this(context, null);
        // TODO Auto-generated constructor stub
    }
    public MyViewGroup(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
        // TODO Auto-generated constructor stub
    }
    public MyViewGroup(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // TODO Auto-generated method stub

        //父控件传进来的宽度和高度以及对应的测量模式
        int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
        int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
        int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
        int modeHeight = MeasureSpec.getMode(heightMeasureSpec);

        //如果当前ViewGroup的宽高为wrap_content的情况
        int width = 0;//自己测量的 宽度
        int height = 0;//自己测量的高度
        //记录每一行的宽度和高度
        int lineWidth = 0;
        int lineHeight = 0;

        //获取子view的个数
        int childCount = getChildCount();
        for(int i = 0;i < childCount; i ++){
            View child = getChildAt(i);
            //测量子View的宽和高
            measureChild(child, widthMeasureSpec, heightMeasureSpec);
            //得到LayoutParams
            MarginLayoutParams lp = (MarginLayoutParams) getLayoutParams();
            //子View占据的宽度
            int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;
            //子View占据的高度
            int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
            //换行时候
            if(lineWidth + childWidth > sizeWidth){
                //对比得到最大的宽度
                width = Math.max(width, lineWidth);
                //重置lineWidth
                lineWidth = childWidth;
                //记录行高
                height += lineHeight;
                lineHeight = childHeight;
            }else{//不换行情况
                //叠加行宽
                lineWidth += childWidth;
                //得到最大行高
                lineHeight = Math.max(lineHeight, childHeight);
            }
            //处理最后一个子View的情况
            if(i == childCount -1){
                width = Math.max(width, lineWidth);
                height += lineHeight;
            }
        }
        //wrap_content
        setMeasuredDimension(modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width,
                modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        // TODO Auto-generated method stub
        mAllChildViews.clear();
        mLineHeight.clear();
        //获取当前ViewGroup的宽度
        int width = getWidth();

        int lineWidth = 0;
        int lineHeight = 0;
        //记录当前行的view
        List<View> lineViews = new ArrayList<View>();
        int childCount = getChildCount();
        for(int i = 0;i < childCount; i ++){
            View child = getChildAt(i);
            MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
            int childWidth = child.getMeasuredWidth();
            int childHeight = child.getMeasuredHeight();

            //如果需要换行
            if(childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width){
                //记录LineHeight
                mLineHeight.add(lineHeight);
                //记录当前行的Views
                mAllChildViews.add(lineViews);
                //重置行的宽高
                lineWidth = 0;
                lineHeight = childHeight + lp.topMargin + lp.bottomMargin;
                //重置view的集合
                lineViews = new ArrayList();
            }
            lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
            lineHeight = Math.max(lineHeight, childHeight + lp.topMargin + lp.bottomMargin);
            lineViews.add(child);
        }
        //处理最后一行
        mLineHeight.add(lineHeight);
        mAllChildViews.add(lineViews);

        //设置子View的位置
        int left = 0;
        int top = 0;
        //获取行数
        int lineCount = mAllChildViews.size();
        for(int i = 0; i < lineCount; i ++){
            //当前行的views和高度
            lineViews = mAllChildViews.get(i);
            lineHeight = mLineHeight.get(i);
            for(int j = 0; j < lineViews.size(); j ++){
                View child = lineViews.get(j);
                //判断是否显示
                if(child.getVisibility() == View.GONE){
                    continue;
                }
                MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
                int cLeft = left + lp.leftMargin;
                int cTop = top + lp.topMargin;
                int cRight = cLeft + child.getMeasuredWidth();
                int cBottom = cTop + child.getMeasuredHeight();
                //进行子View进行布局
                child.layout(cLeft, cTop, cRight, cBottom);
                left += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;
            }
            left = 0;
            top += lineHeight;
        }

    }
    /**
     * 与当前ViewGroup对应的LayoutParams
     */
    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        // TODO Auto-generated method stub

        return new MarginLayoutParams(getContext(), attrs);
    }
}



package com.example.administrator.yizhoukao;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private MyView mv;
    private String mNames[] = {
            "笔记本","空气净化器","安卓手机",
            "超级大号圆珠笔","空气滤芯","超级大号钢笔",
            "气垫cc","防晒霜"
 };
    private MyViewGroup mvg;
    private Dao dao;
    private ListView lv;
    private Button del;
    private TextView view;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mv = findViewById(R.id.mv);
        mvg = findViewById(R.id.mvg);
        lv = findViewById(R.id.lv);
        del = findViewById(R.id.del);
        dao = new Dao(MainActivity.this);


        mv.setOnMyViewClickListener(new MyView.OnMyViewClickListener() {
            @Override
            public void onClickListener(View v) {
                String et_shop = mv.getEt_shop();
                Toast.makeText(MainActivity.this,et_shop,Toast.LENGTH_LONG).show();
                dao.insert(et_shop);
                List<String> select = dao.select();
                ArrayAdapter arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_list_item_1,select);
                lv.setAdapter(arrayAdapter);


            }
        });


        initChildViews();
        del.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dao.deleteData();
                List<String> select = dao.select();
                ArrayAdapter arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_list_item_1,select);
                lv.setAdapter(arrayAdapter);
            }
        });

    }

    private void initChildViews() {
        ViewGroup.MarginLayoutParams lp = new ViewGroup.MarginLayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        lp.leftMargin = 5;
        lp.rightMargin = 5;
        lp.topMargin = 5;
        lp.bottomMargin = 5;
        for(int i = 0; i < mNames.length; i ++){
            view = new TextView(this);
            view.setText(mNames[i]);
             view.setTextSize(15);
            view.setPadding(15,3,15,4);
            //view.setBackgroundDrawable(getResources().getDrawable(R.drawable.textview_bg));
            mvg.addView(view,lp);
            final int finalI = i;
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    mv.setEt_shop(mNames[finalI]);
                    dao.insert(mNames[finalI]);
                    List<String> select = dao.select();
                    ArrayAdapter arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_list_item_1,select);
                    lv.setAdapter(arrayAdapter);
                    Toast.makeText(MainActivity.this,mNames[finalI],Toast.LENGTH_LONG).show();
                }
            });
        }





    }
}

package com.example.administrator.yizhoukao;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2018/4/16 0016.
 */

public class Dao {

    private final SQLiteDatabase db;

    public Dao(Context context) {
        MyHelper helper = new MyHelper(context);
        db = helper.getWritableDatabase();

    }
    //插入数据
    public void insert(String sname){
        ContentValues values = new ContentValues();
        values.put("name",sname);
        db.insert("shops",null,values);
    }

    //查询
    public List<String> select(){
        List<String> list = new ArrayList<>();

        Cursor cursor = db.query("shops", null, null, null, null, null, null);
        while (cursor.moveToNext()){
            String name = cursor.getString(cursor.getColumnIndex("name"));
            list.add(name);
        }
        return list;
    }

    public void deleteData() {

        db.delete("shops",null,null);
    }
}

package com.example.administrator.yizhoukao;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by Administrator on 2018/4/16 0016.
 */

public class MyHelper extends SQLiteOpenHelper {
    public MyHelper(Context context) {
        super(context, "test.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL("create table shops(id integer primary key autoincrement,name text)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

    }
}

activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.yizhoukao.MainActivity"
    android:orientation="vertical">

    <com.example.administrator.yizhoukao.MyView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/mv"
        app:tv_color="#f00"
       android:layout_marginBottom="20dp">

    </com.example.administrator.yizhoukao.MyView>
<com.example.administrator.yizhoukao.MyViewGroup
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:id="@+id/mvg"
    >

</com.example.administrator.yizhoukao.MyViewGroup>
    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/lv"></ListView>
    <Button
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:id="@+id/del"
        android:text="清空历史记录"
        android:background="#fff"
        android:layout_gravity="center_horizontal"/>


</LinearLayout>

myview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_horizontal">
    <EditText
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:hint="请输入搜索内容"
        android:id="@+id/et_shop"

        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/sou"
        android:text="搜索"
        android:textSize="20sp"
        />
</LinearLayout>






                

        

    


  



    

      

        

            

              
                
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