使用 CheckBox 在自定义列表视图中一次选择最多 5 个复选框或计数选中和未选中的复选框
package com.test;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class ListViewCheckboxesActivity extends ListActivity {
AlertDialog alertdialog = null;
int i1, i2, i3 = 0;
Country rowcheck;
MyCustomAdapter dataAdapter = null;
ListView listView = null;
int k = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fmain);
// Generate list View from ArrayList
displayListView();
checkButtonClick();
}
private void displayListView() {
// Array list of countries Equipments
ArrayList<Country> rowcheckList = new ArrayList<Country>();
Country rowcheck = new Country("", "Hex Bolts", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Hex Cap Screw", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Round Head Bolt", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Slotted Head Hex Bolt", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Socket Cap Screw", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Sockets", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Square Head Bolt", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Carriage Bolt", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Plow Bolt", false);
rowcheckList.add(rowcheck);
rowcheck = new Country("", "Struts Clamp", false);
rowcheckList.add(rowcheck);
listView = getListView();
dataAdapter = new MyCustomAdapter(this, R.layout.rowcheck_info,
rowcheckList);
// Assign adapter to ListView
listView.setAdapter(dataAdapter);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Country rowcheck = (Country) parent.getItemAtPosition(position);
}
});
}
private class MyCustomAdapter extends ArrayAdapter<Country> {
private ArrayList<Country> rowcheckList;
public MyCustomAdapter(Context context, int textViewResourceId,
ArrayList<Country> rowcheckList) {
super(context, textViewResourceId, rowcheckList);
this.rowcheckList = new ArrayList<Country>();
this.rowcheckList.addAll(rowcheckList);
}
private class ViewHolder {
TextView code;
CheckBox name;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
Log.v("ConvertView", String.valueOf(position));
if (convertView == null)
{
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.rowcheck_info, null);
holder = new ViewHolder();
holder.code = (TextView) convertView.findViewById(R.id.code);
holder.name = (CheckBox) convertView.findViewById(R.id.checkBox1);
convertView.setTag(holder);
holder.name.setOnClickListener( new View.OnClickListener()
{
public void onClick(View v)
{
CheckBox cb = (CheckBox) v ;
Country rowcheck = (Country) cb.getTag();
//To check maximum 5 Selection
if(k>5)
{
if(!cb.isChecked())
{
rowcheck.selected=true;
System.out.println(k--);
}
else
{
System.out.println("if block in-----");
cb.setChecked(false);
Toast.makeText(getApplicationContext(), "Maximum Selection", Toast.LENGTH_LONG).show();
}
}
else
{
System.out.println("else block in-----");
if(!cb.isChecked())
{
rowcheck.selected=true;
System.out.println(k--);
}
else if(cb.isChecked())
{
rowcheck.selected=false;
System.out.println(k++);
}
}
Toast.makeText(getApplicationContext(),
"Clicked on Checkbox: " + cb.getText() +
" is " + cb.isChecked(),
Toast.LENGTH_LONG).show()
rowcheck.setSelected(cb.isChecked());
}
});
}
else
{
holder = (ViewHolder) convertView.getTag();
}
Country rowcheck = rowcheckList.get(position);
// holder.code.setText(" (" + rowcheck.getCode() + ")");
holder.code.setText(rowcheck.getName());
// holder.name.setText(rowcheck.getName());
holder.name.setChecked(rowcheck.isSelected());
holder.name.setTag(rowcheck);
return convertView;
}
}
private void checkButtonClick() {
Button myButton = (Button) findViewById(R.id.findSelected);
myButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
StringBuffer responseText = new StringBuffer();
responseText.append("The following were selected...\n");
ArrayList<Country> rowcheckList = dataAdapter.rowcheckList;
System.out.println("Size" + rowcheckList.size());
int j = 0;
ArrayList<String> stt = new ArrayList<String>();
for (int i = 0; i < rowcheckList.size(); i++) {
Country rowcheck = rowcheckList.get(i);
// System.out.println(rowcheck.getName());
if (rowcheck.isSelected()) {
stt.add(rowcheck.getName());
// Country.st=new ArrayList<String>();
String s = rowcheck.getName();
System.out.println("String--" + rowcheck.getName());
Country.st.add(s);
j = j++;
System.out.println(j++);
responseText.append("\n" + rowcheck.getName());
}
}
for (int i = 0; i < stt.size(); i++) {
System.out.println("Names----" + stt.get(i).toString());
}
if (j >= 1 && j <= 5) {
Intent i = new Intent(ListViewCheckboxesActivity.this,
PickedItemListView.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
} else {
Toast.makeText(ListViewCheckboxesActivity.this,
"Maximum 5 Selection Allowed", Toast.LENGTH_LONG)
.show();
}
Toast.makeText(ListViewCheckboxesActivity.this, responseText,
Toast.LENGTH_LONG).show();
}
});
}
//Logout ALert Box
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
LayoutInflater inflater = LayoutInflater
.from(ListViewCheckboxesActivity.this);
View dialogview = inflater.inflate(R.layout.logout_popup, null);
final Button ok = (Button) dialogview.findViewById(R.id.ok);
final Button cancel = (Button) dialogview.findViewById(R.id.cancel);
AlertDialog.Builder dialogbuilder = new AlertDialog.Builder(
(ListViewCheckboxesActivity.this));
dialogbuilder.setView(dialogview);
dialogbuilder.setInverseBackgroundForced(true);
alertdialog = dialogbuilder.create();
alertdialog.show();
ok.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
alertdialog.dismiss();
final Intent intent = new Intent(
ListViewCheckboxesActivity.this,
LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
}
});
cancel.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
alertdialog.cancel();
}
});
}
return super.onKeyDown(keyCode, event);
}
}