Listview复选框的选择

问答小助手 2013-04-23 02:19:14

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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

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;

}