我在 Android 中有一个单选按钮组。我在选择项目时收到事件。目前正常。但是,如果用户单击已选择的项目,我不会收到该事件。有没有办法知道(接收事件)用户何时点击单选按钮,无论它是否被选中?非常感谢。
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1158 次
2 回答
4
我不明白为什么在单击已选中的单选按钮时会收到一个事件,但是如果您想通过单击取消选择单选按钮(如果它已被选中)!检查此代码它可以帮助您:
RadioGroup radioGroup;
RadioButton radioButton1;
RadioButton radioButton2;
RadioButton radioButton3;
boolean hack = false;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
radioGroup = (RadioGroup) findViewById(R.id.rg);
radioButton1 = (RadioButton) findViewById(R.id.r1);
radioButton2 = (RadioButton) findViewById(R.id.r2);
radioButton3 = (RadioButton) findViewById(R.id.r3);
OnClickListener radioClickListener = new OnClickListener()
{
public void onClick(View v)
{ //The first codition check if we have clicked on an already selected radioButton
if (v.getId() == radioGroup.getCheckedRadioButtonId() && hack)
{
radioGroup.clearCheck();
}
else
{
hack = true;
}
}
};
OnCheckedChangeListener radioCheckChangeListener = new OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
hack = false;
}
};
radioButton1.setOnCheckedChangeListener(radioCheckChangeListener);
radioButton2.setOnCheckedChangeListener(radioCheckChangeListener);
radioButton3.setOnCheckedChangeListener(radioCheckChangeListener);
radioButton1.setOnClickListener(radioClickListener);
radioButton2.setOnClickListener(radioClickListener);
radioButton3.setOnClickListener(radioClickListener);
}
Hope this wil help
于 2012-05-03T23:35:16.967 回答
0
通过OnClickListener()
在按钮上设置...
于 2012-05-03T23:19:50.553 回答