View--自定义adpter 和 ListView

[android]代码库

可以自定义布局,然后导入数据

1. MainActivity.java

package com.example.acer.myapplication;

import android.support.v4.view.LayoutInflaterFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.BaseAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

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

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ListView listView=(ListView)findViewById(R.id.listView) ;
        MyAdapter adapter=new MyAdapter(getData());
        listView.setAdapter(adapter);
    }

    public List<String> getData()
    {
        List<String> list=new ArrayList<String>();
        for(int i=0;i<10;i++)
        {
            list.add("jaca"+i);
        }
        return  list;
    }

    public  class  MyAdapter extends BaseAdapter
    {
        private List<String> list;
        public MyAdapter(List a)
        {
            list=a;
        }


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

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

         /*   View view= LayoutInflater.from(MainActivity.this).inflate(
                    R.layout.item,null);*/
            TextView textView=new TextView(MainActivity.this);
            textView.setText(list.get(position));
            return textView;
        }
    }
}


2.activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.acer.myapplication.MainActivity">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/listView"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_marginRight="87dp"
        android:layout_marginEnd="87dp" />
</RelativeLayout>

3.item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.acer.myapplication.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="20sp"
        android:textColor="@color/colorPrimary" />
</RelativeLayout>