Assuming you want to get items of row whose check boxes are checked at the click of a button. Assumption based on your title “Get Selected Item Using Checkbox in Listview when I click a Button”.
Try the below. Make only changes as below. Keep the rest the same.
Explanation and discussion on the topic @
https://groups.google.com/forum/?fromgroups#!topic/android-developers/No0LrgJ6q2M
MainActivity.java
public class MainActivity extends Activity {
AppInfoAdapter adapter ;
AppInfo app_info[] ;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ListView listApplication = (ListView)findViewById(R.id.listApplication);
Button b= (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
StringBuilder result = new StringBuilder();
for(int i=0;i<adapter.mCheckStates.size();i++)
{
if(adapter.mCheckStates.get(i)==true)
{
result.append(app_info[i].applicationName);
result.append("\n");
}
}
Toast.makeText(MainActivity.this, result, 1000).show();
}
});
ApplicationInfo applicationInfo = getApplicationInfo();
PackageManager pm = getPackageManager();
List<PackageInfo> pInfo = new ArrayList<PackageInfo>();
pInfo.addAll(pm.getInstalledPackages(0));
app_info = new AppInfo[pInfo.size()];
int counter = 0;
for(PackageInfo item: pInfo){
try{
applicationInfo = pm.getApplicationInfo(item.packageName, 1);
app_info[counter] = new AppInfo(pm.getApplicationIcon(applicationInfo),
String.valueOf(pm.getApplicationLabel(applicationInfo)));
System.out.println(counter);
}
catch(Exception e){
System.out.println(e.getMessage());
}
counter++;
}
adapter = new AppInfoAdapter(this, R.layout.listview_item_row, app_info);
listApplication.setAdapter(adapter);
}
}
activity_main.xml ListView with button at the buton
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ListView
android:layout_width="fill_parent"
android:id="@+id/listApplication"
android:layout_height="fill_parent"
android:layout_above="@+id/button1"
android:text="@string/hello_world" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="Button" />
</RelativeLayout>
AppInfoAdapter
public class AppInfoAdapter extends ArrayAdapter<AppInfo> implements CompoundButton.OnCheckedChangeListener
{ SparseBooleanArray mCheckStates;
Context context;
int layoutResourceId;
AppInfo data[] = null;
public AppInfoAdapter(Context context, int layoutResourceId, AppInfo[] data){
super(context, layoutResourceId,data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
mCheckStates = new SparseBooleanArray(data.length);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View row = convertView;
AppInfoHolder holder= null;
if (row == null){
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new AppInfoHolder();
holder.imgIcon = (ImageView) row.findViewById(R.id.imageView1);
holder.txtTitle = (TextView) row.findViewById(R.id.textView1);
holder.chkSelect = (CheckBox) row.findViewById(R.id.checkBox1);
row.setTag(holder);
}
else{
holder = (AppInfoHolder)row.getTag();
}
AppInfo appinfo = data[position];
holder.txtTitle.setText(appinfo.applicationName);
holder.imgIcon.setImageDrawable(appinfo.icon);
// holder.chkSelect.setChecked(true);
holder.chkSelect.setTag(position);
holder.chkSelect.setChecked(mCheckStates.get(position, false));
holder.chkSelect.setOnCheckedChangeListener(this);
return row;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
static class AppInfoHolder
{
ImageView imgIcon;
TextView txtTitle;
CheckBox chkSelect;
}
}
Here’s the snap shot
