android 点击页面每行，跳转到另一个页面

来源：互联网发布：电脑日记本软件编辑：程序博客网时间：2024/05/17 06:18

实现思路：1、获取id2、获取数据3、给id设置适配器（Adapter）4、给id设置点击事件，循环1-10005、自定义适配器（内存溢出）（1）把布局文件转成view    （2）设值（3）给按钮设置点击事件<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.zking.y2_android0609_widgetplus2.MainActivity"><ListView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/lv_main_list"    ></ListView></LinearLayout>

<?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:descendantFocusability="blocksDescendants"    android:layout_height="match_parent"><ImageView    android:layout_width="50dp"    android:layout_height="50dp"    android:id="@+id/iv_item_icon"    android:src="@drawable/default_ptr_flip"    />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"        android:id="@+id/tv_item_title"        android:text="XX"        android:textSize="30sp"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="下载"        android:id="@+id/btn_item_download"        /></LinearLayout>

public class ItemTag {    public ImageView imageView;    public TextView textView;    public Button button;}

package com.zking.y2_android0609_widgetplus2;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import java.util.List;public class MainActivity extends AppCompatActivity {    private ListView listView;    private int[] images=new int[]{R.drawable.bird,R.drawable.cat,R.drawable.elephant,R.drawable.chicken};    private String[] titles= new String[]{"李思佳","刘再融","唐嫣","刘恺威"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListView) findViewById(R.id.lv_main_list);        //获取数据        //实例化SimpleAdapter        listView.setAdapter(new MyAdapter());        //给ListView设置点击事件  //i%titles.length为了要循环数据0-9下标1-10000        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {                Toast.makeText(MainActivity.this, "跳转到"+titles[i%titles.length]+"页面",Toast.LENGTH_SHORT).show();            }        });    }    //OOM OutOfMemory 内存溢出    class MyAdapter extends BaseAdapter{        @Override        public int getCount() {            return 10000;  //多少条数据        }        @Override        public Object getItem(int i) {            return titles[i%titles.length]; //titles[i]代表获得titles里面每个值        }        @Override        public long getItemId(int i) {  //下标            return i;        }        @Override        public View getView(final int i, View view, ViewGroup viewGroup) {            Log.i("test","i="+i+" "+view);            //把布局文件转成View            if(view==null){  //同一时间最多能看到14条数据，有14个null                view= getLayoutInflater().inflate(R.layout.item_listview,null);                ItemTag itemTag=new ItemTag();                itemTag.imageView= (ImageView) view.findViewById                        (R.id.iv_item_icon);                itemTag.textView= (TextView) view.findViewById                        (R.id.tv_item_title);                itemTag.button= (Button) view.findViewById                        (R.id.btn_item_download);                view.setTag(itemTag);            }            ItemTag itemtag= (ItemTag) view.getTag();            //设值            itemtag.imageView.setImageResource(images[i%titles.length]);            itemtag.textView.setText(titles[i%titles.length]+i);            //给按钮设置点击事件            itemtag.button.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    Toast.makeText(MainActivity.this, "正在下载"+titles[i%titles.length],                            Toast.LENGTH_SHORT).show();                }            });            return view;        }    }}

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