致命异常：main java.lang.IllegalStateException:无法执行活动的方法

这是我的密码

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;


public class MainActivity extends Activity implements RadioGroup.OnCheckedChangeListener {


    private RadioButton r1;
    private RadioButton r2;
    private RadioButton r3;
    private RadioButton r4;
    private RadioButton r5;
    private RadioButton r6;
    private RadioGroup rg1;
    private RadioGroup rg2;
    private EditText v;
    private EditText v2;
    public Button button;
    Spinner spinner;
    @Override
   public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        r1 = (RadioButton) findViewById(R.id.r1);
        r2 = (RadioButton) findViewById(R.id.r2);
        r3 = (RadioButton) findViewById(R.id.r3);
        r4 = (RadioButton) findViewById(R.id.r4);
        r5 = (RadioButton) findViewById(R.id.r5);
        r6 = (RadioButton) findViewById(R.id.r6);
        rg1 = (RadioGroup) findViewById(R.id.rg1);
        rg2 = (RadioGroup) findViewById(R.id.rg2);
        v = (EditText) findViewById(R.id.v);
        v2 = (EditText) findViewById(R.id.v2);
        button = (Button) findViewById(R.id.button);
        spinner = (Spinner) findViewById(R.id.spinner);

        rg1.setOnCheckedChangeListener(this);
        rg2.setOnCheckedChangeListener(this);

        String[] unidades={"Volumen","Longitud","Masa","Temperatura"};
        ArrayAdapter<String> lista = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, unidades);
        spinner.setAdapter(lista);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int i, long id) {
                switch (i){
                    case 0:
                        r1.setText("Litros");
                        r2.setText("MiliLitros");
                        r3.setText("Onzas");
                        r4.setText("Litros");
                        r5.setText("MiliLitros");
                        r6.setText("Onzas");


                        break;
                    case 1:
                        r1.setText("cm");
                        r2.setText("m");
                        r3.setText("Km");
                        r4.setText("cm");
                        r5.setText("m");
                        r6.setText("Km");

                        break;
                    case 2:
                        r1.setText("g");
                        r2.setText("Kg");
                        r3.setText("Lb");
                        r4.setText("g");
                        r5.setText("Kg");
                        r6.setText("Lb");
                        break;

                    case 3:
                        r1.setText("Kelvin");
                        r2.setText("Farenhaith");
                        r3.setText("Centigrados");
                        r4.setText("Kelvin");
                        r5.setText("Farenhaith");
                        r6.setText("Centigrados");
                        break;
                }
            }


            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }


    public void onClick (View view){
        String selec=spinner.getSelectedItem().toString();

        if (selec.equals("Volumen")) {
            if (r1.isChecked() && r5.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b*1000;
                v2.setText(c);
            }

            if (r1.isChecked() && r6.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b*33.814;
                v2.setText((int)c);
            }

            if (r2.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b/1000;
                v2.setText(c);
            }

            if (r2.isChecked() && r6.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b*0.033814;
                v2.setText((int)c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b/33.814;
                v2.setText((int)c);
            }

            if (r3.isChecked() && r5.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b/0.033814;
                v2.setText((int)c);
            }
        }

        String selec1=spinner.getSelectedItem().toString();
        if (selec1.equals("Longitud")) {
            if (r1.isChecked() && r5.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b / 100;
                v2.setText(c);
            }

            if (r1.isChecked() && r6.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b / 100000;
                v2.setText(c);
            }

            if (r2.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b * 100;
                v2.setText(c);
            }

            if (r2.isChecked() && r6.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b * 1000;
                v2.setText(c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b * 100000;
                v2.setText(c);
            }

            if (r3.isChecked() && r5.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                int c = b / 1000;
                v2.setText(c);
            }
        }


        String selec2=spinner.getSelectedItem().toString();
        if (selec2.equals("Masa")){
            if (r1.isChecked() && r5.isChecked()) {
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b*0.001;
                v2.setText((int) c);
            }


            if (r1.isChecked() && r6.isChecked()) {
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b*0.0022046;
                v2.setText((int) c);
            }

            if (r2.isChecked() && r4.isChecked()){
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b/0.001;
                v2.setText((int) c);
            }

            if (r2.isChecked() && r6.isChecked()){
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b * 2.2046;
                v2.setText((int) c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b / 0.0022046;
                v2.setText((int) c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b / 2.2046;
                v2.setText((int) c);
            }
        }

        String selec3=spinner.getSelectedItem().toString();
        if (selec3.equals("Temperatura")){
            if (r1.isChecked() && r5.isChecked()) {
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = (1.8*(b-273))+32;
                v2.setText((int)c);
            }


            if (r1.isChecked() && r6.isChecked()) {
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b-273.15;
                v2.setText((int) c);
            }

            if (r2.isChecked() && r4.isChecked()){
                String a= v.getText().toString();
                int b = Integer.parseInt(a);
                double c = (b-32)/1.8;
                double d = c+273.15;
                v2.setText((int) d);
            }

            if (r2.isChecked() && r6.isChecked()){
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = (b-32)/1.8;
                v2.setText((int) c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = b +273.15;
                v2.setText((int) c);
            }

            if (r3.isChecked() && r4.isChecked()) {
                String a = v.getText().toString();
                int b = Integer.parseInt(a);
                double c = (b*1.8)+32;
                v2.setText((int) c);
            }
        }

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.conversor, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {


    }
}

//这就是错误：

FATAL EXCEPTION: main

Process: com.example.user.conversor, PID: 13477
java.lang.IllegalStateException: Could not execute method of the activity
    at android.view.View$1.onClick(View.java:3823)
    at android.view.View.performClick(View.java:4438)
    at android.view.View$PerformClick.run(View.java:18422)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at android.view.View$1.onClick(View.java:3818)
    at android.view.View.performClick(View.java:4438) 
    at android.view.View$PerformClick.run(View.java:18422) 
    at android.os.Handler.handleCallback(Handler.java:733) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method) 
 Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x2710
    at android.content.res.Resources.getText(Resources.java:244)
    at android.widget.TextView.setText(TextView.java:3888)
    at com.example.user.conversor.MainActivity.onClick(MainActivity.java:118)
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at android.view.View$1.onClick(View.java:3818) 
    at android.view.View.performClick(View.java:4438) 
    at android.view.View$PerformClick.run(View.java:18422) 
    at android.os.Handler.handleCallback(Handler.java:733) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method)

//AND THIS IS DE XML CODE:

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Seleccionar"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />

    <Spinner
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"
        android:layout_below="@+id/textView" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Origen"
        android:id="@+id/textView2"
        android:layout_below="@+id/spinner"
        android:layout_centerHorizontal="true" />

    <RadioGroup
        android:id="@+id/rg1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true"
        android:layout_below="@+id/textView2">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r1"
            android:checked="false" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r2"
            android:checked="false" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r3"
            android:checked="false" />

    </RadioGroup>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="41dp"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Destino"
        android:id="@+id/textView4"
        android:layout_gravity="center_horizontal"
        android:layout_above="@+id/rg2"
        android:layout_centerHorizontal="true" />

    <RadioGroup
        android:id="@+id/rg2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="114dp">



        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r4"
            android:checked="false" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r5"
            android:checked="false"
            android:layout_alignParentTop="true"
            android:layout_alignEnd="@+id/textView3" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/r6"
            android:checked="false" />

    </RadioGroup>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Convertir"
        android:id="@+id/button"
        android:onClick="onClick"
        android:layout_gravity="center_horizontal"
        android:layout_above="@+id/v2"
        android:layout_centerHorizontal="true" />

    <EditText
        android:layout_width="147dp"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/v2"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="32dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Valor"
        android:id="@+id/textView3"
        android:layout_gravity="center_horizontal"
        android:layout_below="@+id/rg1"
        android:layout_centerHorizontal="true" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/v"
        android:layout_centerVertical="true"
        android:layout_alignStart="@+id/textView"
        android:layout_alignEnd="@+id/textView" />


</RelativeLayout>

有什么问题吗

说明在stacktrace的这一行：

原因：android.content.res.Resources$NotFoundException:字符串资源ID 0x2710

---

缺少一个资源。如果仔细查看堆栈跟踪中的行号并与代码中的行号进行比较，则应该能够识别提取资源的行。这将告诉您缺少哪些资源。

请帮助我，问题是什么？？？发布一个适当的问题，如果您有错误，请将stacktrace发布到itOne，问题是您没有向我们显示stacktrace。。。甚至是完整的异常消息。您发布的唯一文本是标题，这是我的代码：。如果你想得到帮助的话，你必须在解释这个问题时多做一些努力。我不理解你的意思，也就是说，我无法识别错误的方向