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。
