Listview复选框的选择
原问题来自于CSDN问答频道,更多解决方案见:http://ask.csdn.net/questions/2175问题描述:
我创建了一个自定义的 listview,有 Image,Text 和 checkbox。如何检测是否选择或未选择复选框。我使用了 onItemClick() 但是没有被调用。我使用的正确吗?
class PInfo {
String appname = "";
String pname = "";
Drawable icon;
}
public class InstalledApps extends Activity{
private static LayoutInflater inflater=null;
private ListView listview;
private Activity activity;
List<PInfo> installedApps = new ArrayList<PInfo>();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.applist);
activity = this;
listview = (ListView)findViewById(R.id.listView1);
PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
for(ApplicationInfo app : packages) {
PInfo newInfo = new PInfo();
newInfo.appname = (String) app.loadLabel(pm);
newInfo.pname = app.packageName;
//newInfo.icon = app.icon;
//Drawable dd = activity.getResources().getDrawable(app.icon);
newInfo.icon = app.loadIcon(getPackageManager());
if((app.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) == 1) {
installedApps.add(newInfo);
} else if ((app.flags & ApplicationInfo.FLAG_SYSTEM) == 1) {
installedApps.add(newInfo);
} else {
installedApps.add(newInfo);
}
}
InstalledAppsAdapter iap = new InstalledAppsAdapter(this, installedApps);
listview.setAdapter(iap);
}
}
class InstalledAppsAdapter extends BaseAdapter{
private Activity activity;
private static LayoutInflater inflater=null;
List<PInfo> installedApps = new ArrayList<PInfo>();
ListView listview;
public InstalledAppsAdapter(Activity a, List<PInfo> b) {
// TODO Auto-generated constructor stub
installedApps = b;
activity = a;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
listview = (ListView)activity.findViewById(R.id.listView1);
//Here is where I have put it currently..
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
PInfo newInfo = (PInfo) listview.getItemAtPosition(arg2);
System.out.println(newInfo.appname);
}
});
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return installedApps.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
View customView = inflater.inflate(R.layout.listrow, arg2,false);
ImageView iv = (ImageView)customView.findViewById(R.id.imageView1);
TextView tv= (TextView) customView.findViewById(R.id.textView2);
CheckBox cb= (CheckBox)customView.findViewById(R.id.checkBox1);
PInfo pinfo = installedApps.get(arg0);
tv.setText(""+pinfo.appname);
iv.setImageDrawable(pinfo.icon);
return customView;
}
}
我要在哪里添加下面的代码(如果这是正确的listner)
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
PInfo newInfo = (PInfo) listview.getItemAtPosition(arg2);
System.out.println(newInfo.appname);
}
});
解决方案:
在 getView 里面加入下面的代码:
@Override--------------------编程问答-------------------- listview = (ListView)findViewById(R.id.listView1);
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
View customView = inflater.inflate(R.layout.listrow, arg2,false);
ImageView iv = (ImageView)customView.findViewById(R.id.imageView1);
TextView tv= (TextView) customView.findViewById(R.id.textView2);
CheckBox cb= (CheckBox)customView.findViewById(R.id.checkBox1);
cb.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
// perform logic
}
}
});
}
PInfo pinfo = installedApps.get(arg0);
tv.setText(""+pinfo.appname);
iv.setImageDrawable(pinfo.icon);
return customView;
}
后面,但是这个是点击list一个条目的,并不是点击checkbox
getView 中设置checkbox的listener --------------------编程问答-------------------- 谢谢牛人 了 --------------------编程问答-------------------- listView中的checkbox或者listItem是否独占了整个焦点呢,将 android:focusable="false"加到布局文件里面试试 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 可以解决头像自动大小 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 很简单,你把R.layout.listrow 这个布局文件,设置
setFocusable(true);
setFocusableInTouchMode(true);
即可,让checkbox的父布局获取焦点即可 --------------------编程问答-------------------- 支持!!!~~~~ --------------------编程问答-------------------- 支持!~~~~~~~~~~ --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 谢谢牛人 了 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 学习了 --------------------编程问答--------------------
上次我就是这样的问题,搞了半个小时。 --------------------编程问答-------------------- vb vb vb --------------------编程问答-------------------- --------------------编程问答-------------------- 这个好复杂啊 --------------------编程问答-------------------- 学习了,很好啊 --------------------编程问答-------------------- 学而不思则罔,思而不学则殆 --------------------编程问答-------------------- --------------------编程问答-------------------- 15648453165 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答-------------------- 不错,学习了 --------------------编程问答-------------------- --------------------编程问答-------------------- 学习了 --------------------编程问答-------------------- JAVA 看不懂
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补充:移动开发 , Android