实现第一周搜索界面

activity_first

<?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"
    android:orientation="vertical"
    tools:context="com.bwie.test.firstzhou_demo.FirstActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:id="@+id/et"/>

        <Button
            android:layout_width="62dp"
            android:layout_height="wrap_content"
            android:text="搜索"
            android:onClick="sousuo"
            android:background="@color/colorAccent"
            tools:ignore="OnClick" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="热搜"
            android:textSize="36dp"
            android:textColor="@android:color/holo_blue_dark"/>
        <com.bwie.test.firstzhou_demo.Custom
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginLeft="100dp">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="笔记本"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="空气净化器"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="安卓手机"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />
        </com.bwie.test.firstzhou_demo.Custom>

        <com.bwie.test.firstzhou_demo.Custom
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginLeft="100dp">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="超大号圆珠笔"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="空气滤芯"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="超大号钢笔"
                android:layout_margin="20dp"
                android:textColor="@android:color/holo_green_dark" />
        </com.bwie.test.firstzhou_demo.Custom>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:text="历史记录"
            android:textColor="@android:color/holo_green_dark" />

        <ListView
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="8"
            android:id="@+id/lv"
            android:textColor="@android:color/holo_orange_dark">
        </ListView>

        <Button
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="清除历史记录"
            android:onClick="delete"
            android:layout_gravity="center_horizontal"
            android:background="@android:color/holo_orange_dark" />
    </LinearLayout>

</LinearLayout>

item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv" />

</LinearLayout>

FirstActivity

无法点击按钮，没有数据库等

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import com.bwie.test.adapter.MyAdapter;
import java.util.ArrayList;
import java.util.List;

public class FirstActivity extends AppCompatActivity {
    EditText et;
    List<String> list;
    ListView lv;
    MyAdapter adapter;
    private String string;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_first);
        //隐藏原有标题
        getSupportActionBar().hide();
        //查找控件
        list=new ArrayList<>();
        et= (EditText) findViewById(R.id.et);
        lv= (ListView) findViewById(R.id.lv);
    }

    //搜索按钮
    public void sousuo(View view) {
        string = et.getText().toString();
        adapter=new MyAdapter(list,this);
        list.add(string);
        lv.setAdapter(adapter);
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, final int position, long id) {
                AlertDialog.Builder builder = new AlertDialog.Builder(FirstActivity.this);
                builder.setMessage("确定删除");
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        list.remove(list.get(position));
                        adapter.notifyDataSetChanged();
                    }
                });

                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                });
                builder.show();
                return;
            }
        });
        adapter.notifyDataSetChanged();
    }

    //清除历史记录
    public void delete(View view) {
        list.clear();
        adapter.notifyDataSetChanged();
    }
}

MyAdapter

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.bwie.test.firstzhou_demo.R;
import java.util.List;

public class MyAdapter extends BaseAdapter{
    List<String> list;
    Context context;

    public MyAdapter(List<String> list, Context context) {
        this.list = list;
        this.context = context;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup viewGroup) {
        ViewHolder holder;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = View.inflate(context, R.layout.item, null);
            holder.tv = convertView.findViewById(R.id.tv);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.tv.setText(list.get(position).toString());
        return convertView;
    }

    class ViewHolder{
        TextView tv;
    }
}

Custom

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
/**
 * 自定义控件
 */

public class Custom extends ViewGroup{
    public Custom(Context context) {
        super(context, null);
    }

    public Custom(Context context, AttributeSet attrs) {
        super(context, attrs,0);
    }

    public Custom(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int wid=0;
        int hei=0;
        int childCount = getChildCount();
        for (int i=0; i<childCount; i++){
            View childAt=getChildAt(i);

            int measuredHeight = childAt.getMeasuredHeight();
            int measuredWidth = childAt.getMeasuredWidth();

            childAt.layout(wid,hei,wid+measuredWidth,hei+measuredHeight);

            wid=wid+measuredWidth+20;
            hei=hei+measuredHeight-measuredHeight;
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        measureChildren(widthMeasureSpec, heightMeasureSpec);
    }
}

实现第一周搜索界面

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