Listview復選框的選擇

問題描述:

我創建瞭一個自定義的 listview,有 Image,Text 和 checkbox。如何檢測是否選擇或未選擇復選框。我使用瞭 onItemClick() 但是沒有被調用。我使用的正確嗎?

[java]
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; 

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;
}
}我要在哪裡添加下面的代碼(如果這是正確的listner)

[java]
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); 
        } 
    }); 

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);
        }
    });
解決方案:

在 getView 裡面加入下面的代碼:

[java]
@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; 

@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;
}

 

發佈留言

發佈留言必須填寫的電子郵件地址不會公開。