我有一段代碼，其中RadioButton一個(gè)包含三個(gè)s RadioGroup。我想設(shè)置的onCheckedListener，將顯示的值RadioButton的Toast。但是，到目前為止我沒有得到任何結(jié)果。如何獲取的值RadioButton并將其顯示在中Toast？預(yù)先謝謝您，這是我的代碼：import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;import android.widget.Toast;public class MainActivity extends Activity { RadioGroup rg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1); final String value = ((RadioButton)findViewById(rg.getCheckedRadioButtonId())) .getText().toString(); rg.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(RadioGroup group, int checkedId) { Toast.makeText(getBaseContext(), value, Toast.LENGTH_SHORT).show(); } }); }}XML檔案：<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" > <RadioGroup android:id="@+id/radioGroup1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="152dp" > </RelativeLayout>
3 回答
慕哥9229398
TA貢獻(xiàn)1877條經(jīng)驗(yàn) 獲得超6個(gè)贊
對(duì)于以編程方式填充并希望獲取索引的任何人，您可能會(huì)注意到，當(dāng)您返回到活動(dòng)/片段并重新添加這些單選按鈕時(shí)，checkedId會(huì)更改。解決該問題的一種方法是使用索引設(shè)置標(biāo)簽：
for(int i = 0; i < myNames.length; i++) {
rB = new RadioButton(getContext());
rB.setText(myNames[i]);
rB.setTag(i);
myRadioGroup.addView(rB,i);
}
然后在您的聽眾中：
myRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton radioButton = (RadioButton) group.findViewById(checkedId);
int mySelectedIndex = (int) radioButton.getTag();
}
});
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