Question

在我的申请中,用户选择了一个无线电台,表明他想要做这个选择的体育比赛的参与者有多少。之后,该数字被送往另一活动,以展示。如果可能的话,如何利用无线电台的id子,并脱掉“无线电”部分,只剩下4-10号 in子?

package teamBuilder;

import com.jonahwitcig.team.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;


public class CorrectedActivity extends Activity {
    /** Called when the activity is first created. */

    TextView player1, team1;
    Button next;
    RadioGroup RBGroup;
    RadioButton RB4, RB5, RB6, RB7, RB8, RB9, RB10;


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.players);

        next = (Button) findViewById(R.id.next);
        //the name of a textView i will be displaying a number in
        team1 = (TextView) findViewById(R.id.team1);
        RB4 = (RadioButton) findViewById(R.id.radio4);
        RB5 = (RadioButton) findViewById(R.id.radio5);
        RB6 = (RadioButton) findViewById(R.id.radio6);
        RB7 = (RadioButton) findViewById(R.id.radio7);
        RB8 = (RadioButton) findViewById(R.id.radio8);
        RB9 = (RadioButton) findViewById(R.id.radio9);
        RB10 = (RadioButton) findViewById(R.id.radio10);
        //names of my radio buttons
        RBGroup = (RadioGroup) findViewById(R.id.RBGroup);



        RBGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            public void onCheckedChanged(RadioGroup RBGroup, int checkedId) {

                team1.setText(checkedId);
            }
        });

Answer 1

虽然这不是建议(相反的眼光如果在大批中进行,则相当缓慢,但如果很少这样做,则是无法解释的),但这里是正确的解决办法。 (考虑到你需要列入自己的错误核对/处理错误识别特征):

String resName = getResources().getResourceEntryName(checkedId);
String number = resName.substring(5);
int num = Integer.parseInt(number);

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