复杂的ListView
需求：实现通过金山卫士的软件管理的复杂ListView，实现：ListView分别有系统应用和用户应用
界面如下：
分析代码：
AppManagerActivity.java
public class AppManagerActivity extends Activity {
private TextView tv_avail_rom;
private TextView tv_avail_sd;
private ListView lv_app_manager;
private LinearLayout ll_loading;
/*
* 所有的应用程序包信息
*/
private List<AppInfo> appInfos;
/*
* 用户应用程序的集合
*/
private List<AppInfo> userAppInfos;
/*
* 系统应用程序的集合
*/
private List<AppInfo> systemAppInfos;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
//setContentView(R.layout.a)
setContentView(R.layout.activity_app_manager);
tv_avail_rom=(TextView) findViewById(R.id.tv_avail_rom);
tv_avail_sd=(TextView) findViewById(R.id.tv_avail_sd);
<strong>//获得内存可用空间和SD卡可用空间
long sdsize=getAvailSpace(Environment.getExternalStorageDirectory().getAbsolutePath());
long romsize=getAvailSpace(Environment.getDataDirectory().getAbsolutePath());
tv_avail_sd.setText("SD卡可用空间:"+Formatter.formatFileSize(this, sdsize));
tv_avail_rom.setText("内存可用空间:"+Formatter.formatFileSize(this, romsize));
//布局
lv_app_manager=(ListView) findViewById(R.id.lv_app_manager);
ll_loading=(LinearLayout) findViewById(R.id.ll_loading);</strong>
ll_loading.setVisibility(View.VISIBLE);
new Thread(){
public void run(){
//得到所有数据
appInfos=AppInfoProvider.getAppInfos(AppManagerActivity.this);
systemAppInfos=new ArrayList<AppInfo>();
userAppInfos=new ArrayList<AppInfo>();
<strong>for(AppInfo info:appInfos){
if(info.isUserApp()){
userAppInfos.add(info);
}else{
systemAppInfos.add(info);
}
}
//加载listview的数据适配器【通过runOnUiThread来实现在线程里面更新主界面的UI】
runOnUiThread(new Runnable(){
@Override
public void run() {
lv_app_manager.setAdapter(new AppManagerAdapter());
ll_loading.setVisibility(View.INVISIBLE);
}
});</strong>
}
}.start();
}
private class AppManagerAdapter extends BaseAdapter{
@Override<strong>//getCount()就是多少个项
public int getCount() {
return userAppInfos.size()+1+systemAppInfos.size()+1;
} </strong>
@Override
public View getView(int position, View convertView, ViewGroup parent) {
AppInfo appinfo;//appInfos.get(position);
<strong>if(position==0){/</strong>/显示的是用户程序有多少个小标签
TextView tv=new TextView(getApplicationContext());
tv.setTextColor(Color.WHITE);
tv.setBackgroundColor(Color.GRAY);
tv.setText("用户程序: "+userAppInfos.size()+"个");
return tv;
}<strong>else if(position==(userAppInfos.size()+1)){//显示的是系统程序有多少个小标签</strong>
TextView tv=new TextView(getApplicationContext());
tv.setTextColor(Color.WHITE);
tv.setBackgroundColor(Color.GRAY);
tv.setText("系统程序: "+systemAppInfos.size()+"个");
return tv;
}<strong>else if(position<=userAppInfos.size()){//用户程序</strong>
int newposition=position-1;
appinfo=userAppInfos.get(newposition);
}<strong>else{//系统程序</strong>
int newposition=position-1-userAppInfos.size()-1;
appinfo=systemAppInfos.get(newposition);
}
View view;
viewHolder holder;
<strong>//不仅需要检查不为空，还要看是合适的类型来复用【主要是多了两个TextView】
if(convertView!=null&&convertView instanceof RelativeLayout){</strong>
view=convertView;
holder=(viewHolder) view.getTag();
}else{
<strong>//将view.inflate方法对View进行了填充
view=View.inflate(getApplicationContext(), R.layout.list_item_appinfo, null);</strong>
holder=new viewHolder();
holder.iv_icon=(ImageView) view.findViewById(R.id.iv_app_icon);
holder.tv_name=(TextView) view.findViewById(R.id.tv_app_name);
holder.tv_location=(TextView) view.findViewById(R.id.tv_app_location);
view.setTag(holder);
}
holder.iv_icon.setImageDrawable(appinfo.getIcon());
holder.tv_name.setText(appinfo.getName());
if(appinfo.isInRom()){
holder.tv_location.setText("手机内存");
}else{
holder.tv_location.setText("外部内存储");
}
return view;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
static class viewHolder{
TextView tv_name;
TextView tv_location;
ImageView iv_icon;
}
<strong>private long getAvailSpace(String path){
StatFs statf=new StatFs(path);
statf.getBlockCount();//获取分区的个数
long size=statf.getBlockSize(); //获取分区的大小
long count=statf.getAvailableBlocks(); //获取可用的区块个数
return size*count;
}</strong>
}
AppInfoProvider.java:得到数据类
public class AppInfoProvider {
/*
<strong> * 业务方法，提供手机里面安装的所有应用程序信息</strong>
* @param context 上下文
* @return
*/
public static List<AppInfo> getAppInfos(Context context){
<strong>PackageManager pm=context.getPackageManager();
//所有的安装在系统上的应用程序包信息
List<PackageInfo> packInfos=pm.getInstalledPackages(0);
List<AppInfo> appInfos=new ArrayList<AppInfo>();
for(PackageInfo packInfo:packInfos){
AppInfo appInfo=new AppInfo();
//packInfo 相当于一个应用程序apk包的清单文件
String packname=packInfo.packageName;
Drawable icon=packInfo.applicationInfo.loadIcon(pm);
String name=packInfo.applicationInfo.loadLabel(pm).toString();
int flags=packInfo.applicationInfo.flags; //应用程序的答题卡
if((flags&ApplicationInfo.FLAG_SYSTEM)==0){
//用户程序
appInfo.setUserApp(true);
}else{
//系统程序
appInfo.setUserApp(false);
}
if((flags&ApplicationInfo.FLAG_EXTERNAL_STORAGE)==0){
//手机的内存
appInfo.setInRom(true);
}else{
//手机的外存储设备
appInfo.setInRom(false);
}
appInfo.setPackname(packname);
appInfo.setIcon(icon);
appInfo.setName(name);
appInfos.add(appInfo);
}
return appInfos;</strong>
}
}
AppInfo.java
<strong>/*
* 应用程序信息的业务Bean
*/</strong>
public class AppInfo {
private Drawable icon;
private String name;
private String packname;
private boolean inRom;
private boolean userApp;
public Drawable getIcon() {
return icon;
}
public void setIcon(Drawable icon) {
this.icon = icon;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPackname() {
return packname;
}
public void setPackname(String packname) {
this.packname = packname;
}
public boolean isInRom() {
return inRom;
}
public void setInRom(boolean inRom) {
this.inRom = inRom;
}
public boolean isUserApp() {
return userApp;
}
public void setUserApp(boolean userApp) {
this.userApp = userApp;
}
}
Layout布局：
<?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:background="#8866ff00"
android:textSize="22sp"
android:textColor="#000000"
android:gravity="center"
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:height="55dip"
android:text="软件管理"
/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/tv_avail_rom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:text="内存可用"
/>
<TextView
android:id="@+id/tv_avail_sd"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:text="SD卡可用"
/>
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:id="@+id/ll_loading"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center"
android:visibility="invisible"
>
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="正在加载程序信息。。。"
/>
</LinearLayout>
<ListView
android:id="@+id/lv_app_manager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
></ListView>
</FrameLayout>
</RelativeLayout>
</LinearLayout>
listview:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="60dip">
<ImageView
android:id="@+id/iv_app_icon"
android:src="@drawable/ic_launcher"
android:layout_width="50dip"
android:layout_height="50dip"
android:layout_marginLeft="5dip"
android:layout_marginBottom="5dip"
android:layout_marginTop="5dip"
/>
<TextView
android:layout_marginTop="8dip"
android:layout_toRightOf="@id/iv_app_icon"
android:id="@+id/tv_app_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="20sp"
android:text="程序名称"
/>
<TextView
android:layout_marginTop="3dip"
android:layout_toRightOf="@id/iv_app_icon"
android:layout_below="@id/tv_app_name"
android:id="@+id/tv_app_location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#88000000"
android:textSize="16sp"
android:text="安装位置"
/>
</RelativeLayout>