RadioGroup.setOnCheckedChangeListener不工作并返回null？

Question

我的名字是Amaya，我是java和Android Studio。我正在为我的最终课程项目构建一个专家系统，但由于我的RadioButton或RadioGroups（说实话，我不知道哪些出错）。其实，我想做一件简单的事情，如果我检查一些我的单选按钮，我可以得到字符串，我可以在另一个布局中设置TextView。这是我的第一布局：

<ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/scrollView2" > 
     <LinearLayout 
      android:orientation="vertical" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"> 

      <TextView 
       android:layout_marginTop="10dp" 
       android:text="Isilah formulir pengecekan kesehatan dibawah ini sesuai dengan keadaan sapi anda!" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView3" 
       android:layout_marginBottom="10dp"/> 
      <View 
       android:layout_width="match_parent" 
       android:layout_height="2dp" 
       android:background="#AFAFAF" 
       android:layout_marginRight="13dp" 
       android:layout_marginLeft="2dp" 
       android:layout_marginBottom="5dp" 
       /> 
      <TextView 
       android:text="Nafsu makan:" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/x1" /> 

      <RadioGroup 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" 
       android:id="@+id/a" 
       android:onClick="onRGClick"> 

       <RadioButton 
        android:text="Normal" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/a1" /> 

       <RadioButton 
        android:text="Tidak normal" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/a2" /> 

      </RadioGroup> 

      <TextView 
       android:layout_marginTop="15dp" 
       android:text="Cungur hidung:" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView4" /> 
      <RadioGroup 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" 
       android:id="@+id/b" 
       android:onClick="onRGClick"> 
       <RadioButton 
        android:text="Basah" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/b1" /> 

       <RadioButton 
        android:text="Tidak basah" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/b2" /> 
      </RadioGroup> 
      <TextView 
       android:layout_marginTop="15dp" 
       android:text="Feses sapi:" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView3" /> 

      <RadioGroup 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" 
       android:id="@+id/c" 
       android:onClick="onRGClick"> 
       <RadioButton 
        android:text="Tidak ada" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/c1" /> 

       <RadioButton 
        android:text="Normal" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/c2" /> 

       <RadioButton 
        android:text="Lembek" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/c3" /> 

       <RadioButton 
        android:text="Mencret" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/c4" /> 

      </RadioGroup> 
      <TextView 
       android:layout_marginTop="15dp" 
       android:text="Ada lendir dari hidung?" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView3" /> 

      <RadioGroup 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" 
       android:id="@+id/d" 
       android:onClick="onRGClick"> 
       <RadioButton 
        android:text="Ada" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/d1" /> 

       <RadioButton 
        android:text="Tidak" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/d2" /> 

      </RadioGroup> 
      <TextView 
       android:layout_marginTop="15dp" 
       android:text="Frekuensi pernafasan:" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/textView3" /> 

      <RadioGroup 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" 
       android:id="@+id/e" 
       android:onClick="onRGClick"> 
       <RadioButton 
        android:text="Normal" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/e1" /> 

       <RadioButton 
        android:text="Dipercepat" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/e2" /> 

      </RadioGroup> 
      <Button 
       android:layout_marginTop="15dp" 
       android:text="Proses" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/proses" 
       android:layout_weight="1.00" 
       android:layout_gravity="center" 
       android:background="@color/colorBackground" 
       android:textColor="#FFFFFF" 
       android:textStyle="bold" /> 


     </LinearLayout> 
    </ScrollView> 
</LinearLayout> 

并且这对于布局的java：

import android.content.DialogInterface; 
import android.content.Intent; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.TextView; 
import android.widget.RadioGroup.OnCheckedChangeListener; 
import android.widget.Toast; 
    public class sehat extends AppCompatActivity { 
     public RadioGroup[] radio = new RadioGroup[14]; 
     public RadioButton[] radiobutton = new RadioButton[29]; 
     public RadioButton a1,a2,b1,b2,c1,c2,c3,c4,d1,d2,e1,e2,f1,f2,g1,g2,h1,h2,i1,i2,j1,j2,j3,k1,k3,k2,l1,l2,l3; 
     public Button Kembali, proses; 
     public String t0,t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12; 

     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.sehat); 
      //iki(); 
      proses = (Button) findViewById(R.id.proses); 
      //radiobutton 
      a1 = (RadioButton) findViewById(R.id.a1); 
      a2 = (RadioButton) findViewById(R.id.a2); 
      b1 = (RadioButton) findViewById(R.id.b1); 
      b2 = (RadioButton) findViewById(R.id.b2); 
      c1 = (RadioButton) findViewById(R.id.c1); 
      c2 = (RadioButton) findViewById(R.id.c2); 
      c3 = (RadioButton) findViewById(R.id.c3); 
      c4 = (RadioButton) findViewById(R.id.c4); 
      d1 = (RadioButton) findViewById(R.id.d1); 
      d2 = (RadioButton) findViewById(R.id.d2); 
      e1 = (RadioButton) findViewById(R.id.e1); 
      e2 = (RadioButton) findViewById(R.id.e2); 
      f1 = (RadioButton) findViewById(R.id.f1); 
      f2 = (RadioButton) findViewById(R.id.f2); 
      g1 = (RadioButton) findViewById(R.id.g1); 
      g2 = (RadioButton) findViewById(R.id.g2); 
      h1 = (RadioButton) findViewById(R.id.h1); 
      h2 = (RadioButton) findViewById(R.id.h2); 
      i1 = (RadioButton) findViewById(R.id.i1); 
      i2 = (RadioButton) findViewById(R.id.i2); 
      j1 = (RadioButton) findViewById(R.id.j1); 
      j2 = (RadioButton) findViewById(R.id.j2); 
      j3 = (RadioButton) findViewById(R.id.j3); 
      k1 = (RadioButton) findViewById(R.id.k1); 
      k2 = (RadioButton) findViewById(R.id.k2); 
      k3 = (RadioButton) findViewById(R.id.k3); 
      l1 = (RadioButton) findViewById(R.id.l1); 
      l2 = (RadioButton) findViewById(R.id.l2); 
      l3 = (RadioButton) findViewById(R.id.l3); 
      //RadioGroup 
      radio[0] = (RadioGroup) findViewById(R.id.a); 
      radio[1] = (RadioGroup) findViewById(R.id.b); 
      radio[2] = (RadioGroup) findViewById(R.id.c); 
      radio[3] = (RadioGroup) findViewById(R.id.d); 
      radio[4] = (RadioGroup) findViewById(R.id.e); 
      radio[5] = (RadioGroup) findViewById(R.id.f); 
      radio[6] = (RadioGroup) findViewById(R.id.g); 
      radio[7] = (RadioGroup) findViewById(R.id.h); 
      radio[8] = (RadioGroup) findViewById(R.id.i); 
      radio[9] = (RadioGroup) findViewById(R.id.j); 
      radio[10] = (RadioGroup) findViewById(R.id.k); 
      radio[11] = (RadioGroup) findViewById(R.id.l); 
      proses.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View arg0) { 
        // TODO Auto-generated method stub 
        AlertDialog.Builder builder1 = new AlertDialog.Builder(sehat.this); 
        builder1.setMessage("Apakah anda sudah yakin dengan semua pilihan yang diisi, dan ingin melihat hasil konsultasi?"); 
        builder1.setCancelable(true); 

        builder1.setPositiveButton(
          "Ya", 
          new DialogInterface.OnClickListener() { 
           public void onClick(DialogInterface dialog, int id) { 
            if ((a1.isChecked() || a2.isChecked()) && (b1.isChecked() || b2.isChecked()) && (c1.isChecked() || c2.isChecked() || c3.isChecked() || c4.isChecked()) && (d1.isChecked() || d2.isChecked()) && (e1.isChecked() || e2.isChecked()) && (f1.isChecked() || f2.isChecked()) && (g1.isChecked() || g2.isChecked()) && (h1.isChecked() || h2.isChecked()) && (i1.isChecked() || i2.isChecked()) && (j1.isChecked() || j2.isChecked() || j3.isChecked()) && (k1.isChecked() || k2.isChecked() || k3.isChecked()) && (l1.isChecked() || l2.isChecked() || l3.isChecked())) { 
             radio[1].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.a1) { 
                t1 = "i"; 
               } else if (checkedId == R.id.a2) { 
                t1 = "yo a2"; 
                t0 = "Tidak Normal"; 

               } 
              } 
             }); 
             radio[2].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.b1) { 
                t2 = "yo a1"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.b2) { 
                t2 = "i"; 
               } 
              } 
             }); 
             radio[3].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.c1) { 
                t3 = "yo a1"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.c2) { 
                t3 = "i"; 
               } 
               else if (checkedId == R.id.c3) { 
                t3 = "yo a2"; 
                t0 = "Tidak Normal"; 
               } 
               else if (checkedId == R.id.c4){ 
                t3 = "yo a2"; 
                t0 = "Tidak Normal"; 

               } 
              } 
             }); 
             radio[4].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.d1) { 
                t4 = "yo a1"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.d2) { 
                t4 = "i"; 
               } 
              } 
             }); 
             radio[5].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.e1) { 
                t5 = "i"; 
               } else if (checkedId == R.id.e2) { 
                t5 = ""; 
                t0 = "Tidak Normal"; 
               } 
              } 
             }); 
             radio[6].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.f1) { 
                t6 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.f2) { 
                t6 = "i"; 
               } 
              } 
             }); 
             radio[7].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.g1) { 
                t7 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.g2) { 
                t7 = "i"; 
               } 
              } 
             }); 
             radio[8].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.h1) { 
                t8 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } else if (checkedId == R.id.h2) { 
                t8 = "i"; 
               } 
              } 
             }); 
             radio[9].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.i1) { 
                t9 = "i"; 
               } else if (checkedId == R.id.i2) { 
                t9 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
              } 
             }); 
             radio[10].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.j1) { 
                t10 = "i"; 
               } else if (checkedId == R.id.j2) { 
                t10 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
               else if (checkedId == R.id.j3) { 
                t10 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
              } 
             }); 
             radio[11].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.k1) { 
                t11 = "i"; 
               } else if (checkedId == R.id.k2) { 
                t11 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
               else if (checkedId == R.id.k3) { 
                t11 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
              } 
             }); 
             radio[12].setOnCheckedChangeListener(new OnCheckedChangeListener() { 
              @Override 
              public void onCheckedChanged(RadioGroup group, int checkedId) { 
               if (checkedId == R.id.l1) { 
                t12 = "i"; 
               } else if (checkedId == R.id.l2) { 
                t12 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
               else if (checkedId == R.id.l3){ 
                t12 = "yo yo"; 
                t0 = "Tidak Normal"; 
               } 
              } 
             }); 

             Intent i = new Intent(getApplicationContext(), Informasi_Sehat.class); 
             startActivity(i); 
            } else { 
             Toast.makeText(getApplicationContext(), "Anda harus menjawab semua pertanyaan terlebih dahulu", Toast.LENGTH_LONG).show(); 
            } 

           } 
          }); 
        builder1.setNegativeButton(
          "Belum", 
          new DialogInterface.OnClickListener() { 
           public void onClick(DialogInterface dialog, int id) { 
            dialog.cancel(); 
           } 
          }); 

        AlertDialog alert11 = builder1.create(); 
        alert11.show(); 
       } 
      }); 
      Button btn_kembalihome = (Button) findViewById(R.id.kembalihomed); 
      btn_kembalihome.setOnClickListener(new View.OnClickListener() { 
       public void onClick(View arg0) { 
        finish(); 
       } 
      }); 
     } 
    } 

的错误信息是：

尝试调用虚拟方法“无效 android.widget .RadioGroup.setOnCheckedChangeListener（android.widget.RadioGroup $ OnCheckedChangeListener）' on null object reference

当我加入程序错误radio[1].setOnCheckedChangeListener bla bla bla。我希望你能帮助我。如果需要的话，这是我的java结果。

public class Informasi_Sehat extends Activity { 
    public TextView tt0,tt1,tt2,tt3,tt4,tt5,tt6,tt7,tt8,tt9,tt10,tt11,tt12; 
    public String t0,t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.informasi_sehat); 
     iku(); 
     ((Button) findViewById(R.id.btn_kembalihome)).setOnClickListener(new View.OnClickListener() { 
      public void onClick(View arg0) { 
       finish(); 
      } 
     }); 
    } 

    public void iku(){ 
     tt0 = (TextView) findViewById(R.id.namaSpecies); 
     tt1 = (TextView) findViewById(R.id.namaDeskripsi1); 
     tt2 = (TextView) findViewById(R.id.namaDeskripsi2); 
     tt3 = (TextView) findViewById(R.id.namaDeskripsi3); 
     tt4 = (TextView) findViewById(R.id.namaDeskripsi4); 
     tt5 = (TextView) findViewById(R.id.namaDeskripsi5); 
     tt6 = (TextView) findViewById(R.id.namaDeskripsi6); 
     tt7 = (TextView) findViewById(R.id.namaDeskripsi7); 
     tt8 = (TextView) findViewById(R.id.namaDeskripsi8); 
     tt9 = (TextView) findViewById(R.id.namaDeskripsi9); 
     tt10 = (TextView) findViewById(R.id.namaDeskripsi10); 
     tt11 = (TextView) findViewById(R.id.namaDeskripsi11); 
     tt12 = (TextView) findViewById(R.id.namaDeskripsi12); 
     tt0.setText(String.valueOf(t0)); 
     tt1.setText(String.valueOf(t1)); 
     tt2.setText(String.valueOf(t2)); 
     tt3.setText(String.valueOf(t3)); 
     tt4.setText(String.valueOf(t4)); 
     tt5.setText(String.valueOf(t5)); 
     tt6.setText(String.valueOf(t6)); 
     tt7.setText(String.valueOf(t7)); 
     tt8.setText(String.valueOf(t8)); 
     tt9.setText(String.valueOf(t9)); 
     tt10.setText(String.valueOf(t10)); 
     tt11.setText(String.valueOf(t11)); 
     tt12.setText(String.valueOf(t12)); 
    } 



} 

谢谢。如果我的语法不好，我很抱歉。

Answer 1

您是在用Java开发您的专家系统吗？可能吗？