我的名字叫amaya，我在java和Android Studio中是新手。我正在为我的最后一堂课项目建立一个专家系统，但是由于我的RadioButton或RadioGroups，我会被卡住（老实说，我不知道哪些犯错）。实际上，我想做一个简单的事情，如果我检查一些放射线to子，我可以在另一个布局中获得可以将TextView设置的字符串。这是我的第一个布局：
<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>
这是布局的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();
}
});
}
}
错误消息是：
尝试调用虚拟方法'void android.widget.radiogroup.setonCheckedChangeListener（android.widget.radiogroup $ oncheckedchangelistener）''）' 在null对象引用
上
当我添加 radio[1].setOnCheckedChangeListener bla bla bla时，程序错误。我希望你可以帮助我。如果需要，这是我的结果Java。
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。对不起，如果我的语法不好。
您是否在Java开发专家系统？有可能吗？