Android编程实现在adapter中进行数据操作的方法
本文实例讲述了Android编程实现在adapter中进行数据操作的方法。分享给大家供大家参考，具体如下：
packagecom.cvte.apkclassify;
importjava.util.ArrayList;
importandroid.content.Context;
importandroid.content.pm.ApplicationInfo;
importandroid.content.pm.PackageInfo;
importandroid.content.pm.PackageManager;
importandroid.content.pm.PackageManager.NameNotFoundException;
importandroid.graphics.drawable.Drawable;
importandroid.util.Log;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.ImageView;
importandroid.widget.TextView;
publicclassItemAdapterextendsBaseAdapter{
privateContextcontext;
privateLayoutInflaterinflater;
privatePackageManagerpManager;
privateArrayList<PackageInfo>apps;
privateArrayList<ApkBean>allApkBeans;
privateApkBeanbean=newApkBean();
privateDBUtilsutils;
privateApplicationInfoappinfo;
privatestaticintll=1;
publicItemAdapter(Contextc){
super();
this.context=c;
pManager=context.getPackageManager();
apps=(ArrayList<PackageInfo>)GetAllAppInfo.getAllapps(context);
utils=newDBUtils(context);
allApkBeans=(ArrayList<ApkBean>)utils.getAllRecords();
for(inti=0;i<apps.size();i++){
bean=newApkBean();
bean.setApkname(pManager.getApplicationLabel(apps.get(i).applicationInfo).toString());
bean.setKind(0);
bean.setPackagename(apps.get(i).applicationInfo.packageName);
utils.insert(bean);
}
}
@Override
publicintgetCount(){
//TODOAuto-generatedmethodstub
returnapps.size();
}
@Override
publicObjectgetItem(intposition){
//TODOAuto-generatedmethodstub
returnapps.get(position);
}
@Override
publiclonggetItemId(intposition){
//TODOAuto-generatedmethodstub
return0;
}
@Override
publicViewgetView(intposition,Viewview,ViewGroupparent){
ViewHolderholder=null;
inflater=LayoutInflater.from(context);
if(view==null){
holder=newViewHolder();
view=inflater.inflate(R.layout.listitem,null);
holder.apkimage=(ImageView)view.findViewById(R.id.apkimage);
holder.apkname=(TextView)view.findViewById(R.id.apkname);
holder.result=(TextView)view.findViewById(R.id.result);
view.setTag(holder);
}else{
holder=(ViewHolder)view.getTag();
}
if(allApkBeans==null||allApkBeans.size()==0){
PackageInfopinfo=apps.get(position);
Stringname=pManager.getApplicationLabel(pinfo.applicationInfo).toString();
holder.apkimage.setBackgroundDrawable(pManager.getApplicationIcon(pinfo.applicationInfo));
holder.apkname.setText(name);
holder.result.setText("未分类");
}else{
ApkBeanbean=allApkBeans.get(position);
holder.apkimage.setBackgroundDrawable(getIconFromPackageName(bean.getPackagename()));
holder.apkname.setText(bean.getApkname());
if(bean.getKind()!=0){
holder.result.setText("已经分类");
}else{
holder.result.setText("未分类");
}
}
returnview;
}
classViewHolder{
publicImageViewapkimage;
publicTextViewapkname;
publicTextViewresult;
}
privateDrawablegetIconFromPackageName(Stringname){
Drawableimage=null;
try{
appinfo=pManager.getApplicationInfo(name,PackageManager.GET_META_DATA);
image=pManager.getApplicationIcon(appinfo);
}catch(NameNotFoundExceptione){
Log.i("nopackagename","nopackagename");
}
returnimage;
}
}
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希望本文所述对大家Android程序设计有所帮助。