Java RadioButton不能正常工作

有人能看看下面的内容，试着解释一下我遗漏了什么吗？我以前在一个应用程序中使用过下面的方法，它非常有效。我确信我错过了一些愚蠢的事情，我很想找个人来看看

我输入风量和压力，然后单击我的单选按钮ForwardCBD。这将创建一个双电源，然后输出到屏幕上，但会导致应用程序崩溃

有什么想法吗

EditText AirVolume, Pressure,FCBD,BCBD,BCDD;
TextView Power;
RadioGroup Fans;
RadioButton ForwardCBD, BackwardCBD, BackwardCDD;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.car);

    AirVolume=(EditText)findViewById(R.id.AirVolume);
    Pressure=(EditText)findViewById(R.id.Pressure);

    Power=(TextView)findViewById(R.id.Power);

    ForwardCBD=(RadioButton)findViewById(R.id.ForwardCBD);
    BackwardCBD=(RadioButton)findViewById(R.id.BackwardCBD);
    BackwardCDD=(RadioButton)findViewById(R.id.BackwardCDD);

    Fans=(RadioGroup)findViewById(R.id.Fans);
    Fans.setOnCheckedChangeListener(this);

}   

public void onCheckedChanged(RadioGroup Fans, int aplication) {

    if (aplication==R.id.ForwardCBD){

        double airVolume = Double.parseDouble(AirVolume.getText().toString());
        double pressure = Double.parseDouble(Pressure.getText().toString());
        double fCBD = Double.parseDouble(FCBD.getText().toString());        
        double power = (airVolume * pressure) / (fCBD /100);
        DecimalFormat df = new DecimalFormat();
        Power.setText(df.format(power)+("W"));

    }
    if (aplication==R.id.BackwardCBD){

        double airVolume = Double.parseDouble(AirVolume.getText().toString());
        double pressure = Double.parseDouble(Pressure.getText().toString());
        double bCBD = Double.parseDouble(BCBD.getText().toString());        
        double power = (airVolume * pressure) / (bCBD /100);
        DecimalFormat df = new DecimalFormat();
        Power.setText(df.format(power)+("W"));

    }
    if (aplication==R.id.BackwardCDD){
        double airVolume = Double.parseDouble(AirVolume.getText().toString());
        double pressure = Double.parseDouble(Pressure.getText().toString());
        double bCDD = Double.parseDouble(BCDD.getText().toString());        
        double power = (airVolume * pressure) / (bCDD /100);
        DecimalFormat df = new DecimalFormat();
        Power.setText(df.format(power)+("W"));
    }

}   
}

请参阅下面的日志

我真的不知道如何在这里以一个像样的格式呈现，所以提前表示歉意

08-19 12:10:24.576: E/AndroidRuntime(11733): FATAL EXCEPTION: main
08-19 12:10:24.576: E/AndroidRuntime(11733): java.lang.NullPointerException
08-19 12:10:24.576: E/AndroidRuntime(11733):    at com.test.will.CarSystems.onCheckedChanged(CarSystems.java:46)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.RadioGroup.setCheckedId(RadioGroup.java:172)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.RadioGroup.access$600(RadioGroup.java:52)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.RadioGroup$CheckedStateTracker.onCheckedChanged(RadioGroup.java:342)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.CompoundButton.setChecked(CompoundButton.java:128)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.CompoundButton.toggle(CompoundButton.java:87)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.RadioButton.toggle(RadioButton.java:75)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.widget.CompoundButton.performClick(CompoundButton.java:99)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.view.View$PerformClick.run(View.java:14400)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.os.Handler.handleCallback(Handler.java:605)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.os.Handler.dispatchMessage(Handler.java:92)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.os.Looper.loop(Looper.java:154)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at android.app.ActivityThread.main(ActivityThread.java:4945)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at java.lang.reflect.Method.invokeNative(Native Method)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at java.lang.reflect.Method.invoke(Method.java:511)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-19 12:10:24.576: E/AndroidRuntime(11733):    at dalvik.system.NativeStart.main(Native Method)

---

您在哪里为FCBD、BCBD、BCDD分配了组件；可能是空指针

你的使命

double fCBD = Double.parseDouble(FCBD.getText().toString());

但您在哪里定义/分配了FCBD，即

FCBD=(EditText)findViewById(R.id.FCBD);

---

否则，在调试模式下单步执行，您会发现其中一个属性为null，您试图调用该属性的方法。

Crash=LogCat stacktrace。伙计们，加上日志我就知道这是个愚蠢的错误。。。谢谢你指出一个显而易见的事实，你让我在接下来的几个小时里不再为这件事而紧张。