我需要使用 Java 以编程方式创建许多复选框，检查其中一个是否被选中，当我单击Next 按钮时，控件将移至下一页。如果它们都没有被选中，则必须显示 toast 消息。请提出建议，因为我是 Android 新手。
这是我的代码：
public class TestValidCheckboxActivity extends Activity implements OnCheckedChangeListener{
private RelativeLayout layoutMiddle = null;
private TableLayout layout1;
private CheckBox chk;
private String[] resarr = {"silu", "pinky", "meera"};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layoutMiddle = (RelativeLayout)findViewById(R.id.layoutMiddleUp);
layout1 = (TableLayout)findViewById(R.id.tableId1);
final Button btnNext = (Button)findViewById(R.id.btnNext);
int i = 0;
for(String res: resarr){
TableRow tr=new TableRow(this);
chk=new CheckBox(this);
chk.setId(i);
chk.setText(res);
chk.setTextColor(Color.BLACK);
tr.addView(chk);
i++;
RelativeLayout.LayoutParams lay = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
lay.addRule(RelativeLayout.BELOW, layoutMiddle.getId());
layout1.addView(tr, lay);
}
chk.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// TODO Auto-generated method stub
if (arg1)
{
btnNext.setOnClickListener(new View.OnClickListener() {
public void onClick(final View view) {
Log.e("1111111111","111111111");
if(chk.isChecked()){
Intent intent = new Intent(view.getContext(),NextPage.class);
startActivityForResult(intent, 0);
}else{
Toast msg = Toast.makeText(view.getContext(), "please choose at least one option", Toast.LENGTH_LONG);
msg.show();
}
}
});
}else{
Toast msg = Toast.makeText(TestValidCheckboxActivity.this, "please choose at least one option", Toast.LENGTH_LONG);
}
}
});
}
@Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// TODO Auto-generated method stub
}
}