android - 次のボタンクリックアクションが完了したときにラジオボタングループをクリアする方法は?

Question

私はアンドロイドが初めてです..

グループのラジオボタンのチェックを外す際に問題に直面しています....

私の問題は....

私はクイズベースのアプリを開発しています。ユーザーがこのアプリのラジオボタンを開くと、1 つのクエストと 4 つのオプション (ラジオボタン) が表示されますが、ユーザーが 1 つのクエストに回答し、次のクエストのラジオボタンに進むと、問題が発生します。チェックを外したい/すべてのクエストのラジオボタンをリセットするにはどうすればよいですか?

私が直面しているもう1つの問題は...ユーザーが最初のボタンを選択し、再びオプションを変更したい場合、別のボタンを選択して選択できないはずです..

これを実装する方法は？

どんな助けでも大歓迎です。

    protected void onPostExecute(String file_url) {
        pDialog.dismiss();
     ques1=new ArrayList<String>(new ArrayList<String>(ques1));
        //  j=0;
        TextView txtque = (TextView) findViewById(R.id.que_txt); 
        txtque.setText(ques1.get(j));
answ1=new ArrayList<String>(new ArrayList<String>(answ1));
        btn_practice1.setText(answ1.get(0));
        btn_practice2.setText(answ1.get(1));
        btn_practice3.setText(answ1.get(2));
        btn_practice4.setText(answ1.get(3));
        btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) { 
                RadioButton radioButton = (RadioButton) findViewById(checkedId);
                String temp = radioButton.getText().toString();
                crrtans=new ArrayList<String>(new ArrayList<String>(crrtans));
                if (temp.equals(crrtans.get(l))){
                TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                txtRadio.setText("" + radioButton.getText() + " IS CORRECT");   
                txtRadio.setTextColor(Color.parseColor("#008000"));
            }else{
                //RadioButton radioButton1 = (RadioButton) findViewById(checkedId);
                   // Toast.makeText(Question.this, "" + radioButton.getText(), 2000).show(); 
                    TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                    txtRadio.setText("" + radioButton.getText() + "is INCORRECT");
                    txtRadio.setTextColor(Color.parseColor("#FF0000"));
            }
            }
     });
    Button nextBtn = (Button) findViewById(R.id.nxt_btn);
    nextBtn.setOnClickListener(new Button.OnClickListener(){
      public void onClick(View v){  
          if (j == ques1.size() -1) {
                finish();
            }
          else{ 
            ++j;
            TextView txtque = (TextView) findViewById(R.id.que_txt); 
            txtque.setText(ques1.get(j));
            ++k;
            btn_practice1.setText(answ1.get((k*4)+0));
            btn_practice2.setText(answ1.get((k*4)+1));
            btn_practice3.setText(answ1.get((k*4)+2));
            btn_practice4.setText(answ1.get((k*4)+3));
          }
          btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) { 
                    RadioButton radioButton = (RadioButton) findViewById(checkedId);
                    String temp = radioButton.getText().toString();
                    l++;
                    if (temp.equals(crrtans.get(l))){
                    TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                    txtRadio.setText("" + radioButton.getText() + " IS CORRECT");   
                    txtRadio.setTextColor(Color.parseColor("#008000"));
                }else{
                    //RadioButton radioButton1 = (RadioButton) findViewById(checkedId);
                       // Toast.makeText(Question.this, "" + radioButton.getText(), 2000).show(); 
                        TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                        txtRadio.setText("" + radioButton.getText() + " IS INCORRECT");
                        txtRadio.setTextColor(Color.parseColor("#FF0000"));
                }
                }      
         });
     }
});   
    Button previousbtn = (Button) findViewById(R.id.prv_btn);
    previousbtn.setOnClickListener(new Button.OnClickListener(){
    public void onClick(View v){
        if (j <= 0) {
            Toast.makeText(Question.this, "First Question",Toast.LENGTH_SHORT).show();
            } else {
            --j;
            TextView txtque = (TextView) findViewById(R.id.que_txt); 
            txtque.setText(ques1.get(j));
            --k;
            btn_practice1.setText(answ1.get((k*4)+0));
            btn_practice2.setText(answ1.get((k*4)+1));
            btn_practice3.setText(answ1.get((k*4)+2));
            btn_practice4.setText(answ1.get((k*4)+3));
            }
         btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) { 
                    RadioButton radioButton = (RadioButton) findViewById(checkedId);
                    String temp = radioButton.getText().toString();
                    l--;
                    if (temp.equals(crrtans.get(l))){
                    TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                    txtRadio.setText("" + radioButton.getText() + " IS CORRECT");   
                    txtRadio.setTextColor(Color.parseColor("#008000"));
                }else{
                    //RadioButton radioButton1 = (RadioButton) findViewById(checkedId);
                       // Toast.makeText(Question.this, "" + radioButton.getText(), 2000).show(); 
                        TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                        txtRadio.setText("" + radioButton.getText() + " IS INCORRECT");
                        txtRadio.setTextColor(Color.parseColor("#FF0000"));
                }
                }      
         });
         }
    });
    }

丸太猫

             E/AndroidRuntime(1457): FATAL EXCEPTION: main
             E/AndroidRuntime(1457): java.lang.NullPointerException
             E/AndroidRuntime(1457):    at 
           com.example.finalpractice.Question$LoadQuestions$1.onCheckedChanged(Question.java:205)
             E/AndroidRuntime(1457):    at 
           android.widget.RadioGroup.setCheckedId(RadioGroup.java:172)
             E/AndroidRuntime(1457):    at 
           android.widget.RadioGroup.check(RadioGroup.java:166)
             E/AndroidRuntime(1457):    at    
           android.widget.RadioGroup.clearCheck(RadioGroup.java:205)
             E/AndroidRuntime(1457):    at 
           com.example.finalpractice.Question$LoadQuestions$2.onClick(Question.java:238)
             E/AndroidRuntime(1457):    at android.view.View.performClick(View.java:2485)
             E/AndroidRuntime(1457):    at android.view.View$PerformClick.run(View.java:9080)
             E/AndroidRuntime(1457):    at 
           android.os.Handler.handleCallback(Handler.java:587)
             E/AndroidRuntime(1457):    at 
           android.os.Handler.dispatchMessage(Handler.java:92)

score 4 · Accepted Answer

これを使って..

RadioGroup radiogrp = (RadioGroup)findViewById(R.id.radiogrp);

オンクリックの内部

radiogrp.clearCheck();

score 1 · Accepted Answer

radioGroup.clearCheck();次のボタンに追加します。

 Button nextBtn = (Button) findViewById(R.id.nxt_btn);
nextBtn.setOnClickListener(new Button.OnClickListener(){
  public void onClick(View v){  
      if (j == ques1.size() -1) {
            finish();
        }
      else{ 
        ++j;
        TextView txtque = (TextView) findViewById(R.id.que_txt); 
        txtque.setText(ques1.get(j));
        ++k;
        btn_practicerg.clearCheck();
        btn_practice1.setText(answ1.get((k*4)+0));
        btn_practice2.setText(answ1.get((k*4)+1));
        btn_practice3.setText(answ1.get((k*4)+2));
        btn_practice4.setText(answ1.get((k*4)+3));
      }

score 0 · Accepted Answer

これが解決策です。

onCheckedChanged() に次の 2 行のコードを追加します。

int selectedId = group.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) group.findViewById(selectedId);

コードに同じ変更を加えました。

Button previousbtn = (Button) findViewById(R.id.prv_btn);
previousbtn.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
    if (j <= 0) {
        Toast.makeText(Question.this, "First Question",Toast.LENGTH_SHORT).show();
        } else {
        --j;
        TextView txtque = (TextView) findViewById(R.id.que_txt); 
        txtque.setText(ques1.get(j));
        --k;
        btn_practice1.setText(answ1.get((k*4)+0));
        btn_practice2.setText(answ1.get((k*4)+1));
        btn_practice3.setText(answ1.get((k*4)+2));
        btn_practice4.setText(answ1.get((k*4)+3));
        }
     btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) { 
            int selectedId = group.getCheckedRadioButtonId();
        RadioButton radioButton = (RadioButton) group.findViewById(selectedId);
                String temp = radioButton.getText().toString();
                l--;
                if (temp.equals(crrtans.get(l))){
                TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                txtRadio.setText("" + radioButton.getText() + " IS CORRECT");   
                txtRadio.setTextColor(Color.parseColor("#008000"));
            }else{
                //RadioButton radioButton1 = (RadioButton) findViewById(checkedId);
                   // Toast.makeText(Question.this, "" + radioButton.getText(), 2000).show(); 
                    TextView txtRadio = (TextView) findViewById(R.id.rdtxt); 
                    txtRadio.setText("" + radioButton.getText() + " IS INCORRECT");
                    txtRadio.setTextColor(Color.parseColor("#FF0000"));
            }
            }      
     });
     }
});

android - 次のボタンクリックアクションが完了したときにラジオボタングループをクリアする方法は?

3 に答える 3

Related

Reference