ListView和ImageView用法

 我原本使用SimpleAdapter,这样的点击ListView的ImageView的话不能响应点击事件，因为要在同一个Activity中用到两个layout，所以需要重新写一个Adapter，继承BaseAdapter，复写其中的一些方法，在getView方法中才能用这个ImageView的onClick方法。

main.xml文件中

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

android:descendantFocusability="blocksDescendants"

>

 

<LinearLayout

android:id="@+id/listLinearLayout"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical"

>

<ListView

android:id="@+id/mylistview"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:drawSelectorOnTop="false"

android:background="#ffffff"

android:scrollbars="vertical"

android:cacheColorHint="#00000000"

/>

</LinearLayout>

</LinearLayout>

 

listView的Item.xml文件

 

<?xmlversion="1.0"encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

android:background="@drawable/my_item_bg">

 

<RelativeLayout

android:id="@+id/relativeID"

android:layout_width="match_parent"

android:layout_height="60dp"

android:layout_marginLeft="2dp"

android:layout_marginRight="dp"

>

<ImageView

android:id="@+id/nav_adapter_img"

android:layout_width="60dp"

android:layout_height="60dp"

android:layout_marginLeft="6dp"

android:layout_marginRight="6dp"

android:layout_gravity="center"

android:src="@drawable/btn_rating_star_on_normal"

/>

<TextView

android:id="@+id/nav_adapter_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/nav_adapter_img"

android:textAppearance="?android:attr/textAppearanceLarge"

android:text="test.star"

android:textColor="#000000"

/>

<TextView

android:id="@+id/nav_adapter_size"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="5dip"

android:layout_alignLeft="@id/nav_adapter_name"

android:layout_below="@id/nav_adapter_name"

android:textAppearance="?android:attr/textAppearanceSmall"

android:text="306.5K"

android:textColor="#555555"/>

<ImageView

android:id="@+id/nav_adapter_Right_img"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="6dp"

android:layout_marginRight="6dp"

android:layout_alignParentRight="true"

android:layout_gravity="center"

android:layout_centerVertical="true"

android:src="@drawable/my_but_press"

android:clickable="true"

android:focusable="false"

/>

</RelativeLayout>

</LinearLayout>

 

 

TestActivity.java中

package zjq.android.test;

 

 

import java.util.ArrayList;

import java.util.HashMap;

 

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.LayoutInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageButton;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

 

publicclass TestActivity extends Activity {

/** Called when the activity is first created. */

private ListView myListView = null;

private Button seekButton = null;

private Button imageSwitcherBut = null;

private Button gridviewBut = null;

private ImageView imgView = null;

private ImageView nav_adapter_Right_img = null;

private ImageButton imgButton = null;

 

@Override

publicvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

ArrayList<HashMap<String,String>> mlist = new ArrayList<HashMap<String,String>>();

HashMap<String,String> map = new HashMap<String,String>();

HashMap<String,String> map2 = new HashMap<String,String>();

map.put("nav_adapter_img", "");

map.put("nav_adapter_name", "audio1234.mp3");

map.put("nav_adapter_size", "300k");

map.put("nav_adapter_Right_img", "");

 

map2.put("nav_adapter_img", "");

map2.put("nav_adapter_name", "audio5678.mp3");

map2.put("nav_adapter_size", "7890k");

map2.put("nav_adapter_Right_img", "");

 

myListView = (ListView) findViewById(R.id.mylistview);

mlist.add(map);

mlist.add(map2);

myListView.setAdapter(new MyListViewAdapter(this,mlist));

 

}

//适配器，获取数据，显示数据

staticclass MyListViewAdapter extends BaseAdapter{

ArrayList<HashMap<String,String>> mlist;

LayoutInflater mLayoutInflater;

Context mContext;

public MyListViewAdapter(Context mContext,ArrayList<HashMap<String, String>> mlist) {

super();

this.mlist = mlist;

mLayoutInflater = LayoutInflater.from(mContext);

this.mContext =mContext;

}

 

@Override

publicint getCount() {

// TODO Auto-generated method stub

returnmlist.size();

}

 

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

returnmlist.get(position);

}

 

@Override

publiclong getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

 

@Override

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

 

if(convertView == null)

{

convertView = mLayoutInflater.inflate(R.layout.items, null);

 

}

TextView tv = (TextView) convertView.findViewById(R.id.nav_adapter_name);

tv.setText(((HashMap<String,String>)getItem(position)).get("nav_adapter_name"));

tv = (TextView) convertView.findViewById(R.id.nav_adapter_size);

tv.setText(((HashMap<String,String>)getItem(position)).get("nav_adapter_size"));

 

//imageView test 要用到item.xml文件中的imageView

ImageView img = (ImageView)convertView.findViewById(R.id.nav_adapter_Right_img);

//点击ImageView，跳转页面到 summaryActivity

img.setOnClickListener(new OnClickListener() {

 

@Override

publicvoid onClick(View v) {

// TODO Auto-generated method stub

Intent intent = new Intent();

intent.setClass(mContext, summaryActivity.class);

mContext.startActivity(intent);

}

});

return convertView;

}

 

}

 

}

在manifest中注册

<activity

android:name=".summaryActivity"

android:label="@string/app_name" >

</activity>

 

我原本使用SimpleAdapter,这样的点击ListView的ImageView的话不能响应点击事件，因为要在同一个Activity中用到两个layout，所以需要重新写一个Adapter，继承BaseAdapter，复写其中的一些方法，在getView方法中才能用这个ImageView的onClick方法。