庫中的錯誤

這是logcat。我的計劃是計算器，我不知道如何解決這個錯誤庫中的錯誤

E/AndroidRuntime(620): java.lang.RuntimeException: Unable to start activity ComponentInfo{calculator.tt/calculator.tt.CalculatorActivity}: java.lang.ClassCastException: android.widget.EditText cannot be cast to android.widget.Button

這是main.xml中的文件，我的佈局具有的EditText和5 tablerow的。在最後一個表格中，我做了比另一個按鈕大的平等按鈕。

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:orientation="vertical" > 



     <EditText 
      android:id="@+id/answer" 
      android:layout_width="match_parent" 
      android:layout_height="70dp" 
      android:ems="10" 
      android:gravity="right|center|end" 
      android:lines="1" > 

      <requestFocus /> 
     </EditText> 


     <TableRow 
      android:id="@+id/TableRow02" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="left" 
      android:paddingLeft="5dp" 
      android:paddingTop="30dp" > 

      <Button 
       android:id="@+id/open" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="(" /> 

      <Button 
       android:id="@+id/close" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text=")" /> 


      <ImageButton 
       android:id="@+id/sqrt" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:src="@drawable/sqrt" /> 

      <Button 
       android:id="@+id/add" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="+" /> 
     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow1" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="5dp" > 



      <ImageButton 
       android:id="@+id/x2" 
       android:layout_width="77dp" 
       android:layout_height="match_parent" 
       android:src="@drawable/x2" /> 


      <ImageButton 
       android:id="@+id/x3" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:src="@drawable/x3" /> 


      <Button 
       android:id="@+id/giaithua" 
       android:layout_width="77dp" 
       android:layout_height="match_parent" 
       android:text="x!" /> 


      <Button 
       android:id="@+id/sub" 
       android:layout_width="77dp" 
       android:layout_height="match_parent" 
       android:text="-" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/TableRow03" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="5dp" > 

      <Button 
       android:id="@+id/key7" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="7" /> 

      <Button 
       android:id="@+id/key8" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="8" /> 

      <Button 
       android:id="@+id/key9" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="9" /> 

      <Button 
       android:id="@+id/mul" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="*" /> 
     </TableRow> 

     <TableRow 
      android:id="@+id/TableRow04" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="5dp" > 

      <Button 
       android:id="@+id/key4" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="4" /> 

      <Button 
       android:id="@+id/key5" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="5" /> 

      <Button 
       android:id="@+id/key6" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="6" /> 

      <Button 
       android:id="@+id/div" 
       android:layout_width="77dp" 
       android:layout_height="wrap_content" 
       android:text="/" /> 
     </TableRow> 

     <TableRow 
      android:id="@+id/TableRow05" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:paddingLeft="5dp" > 

      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:orientation="vertical" > 

       <LinearLayout 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" > 

        <Button 
         android:id="@+id/key1" 
         android:layout_width="77dp" 
         android:layout_height="wrap_content" 
         android:text="1" /> 

        <Button 
         android:id="@+id/key2" 
         android:layout_width="77dp" 
         android:layout_height="wrap_content" 
         android:text="2" /> 

        <Button 
         android:id="@+id/key3" 
         android:layout_width="77dp" 
         android:layout_height="wrap_content" 
         android:text="3" /> 
       </LinearLayout> 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" > 

        <Button 
         android:id="@+id/dot" 
         android:layout_width="77dp" 
         android:layout_height="wrap_content" 
         android:text="." /> 

        <Button 
         android:id="@+id/key0" 
         android:layout_width="77dp" 
         android:layout_height="wrap_content" 
         android:text="0" /> 


        <ImageButton 
         android:id="@+id/minus" 
         android:layout_width="77dp" 
         android:layout_height="match_parent" 
         android:src="@drawable/minus" /> 

       </LinearLayout> 
      </LinearLayout> 

      <Button 
       android:id="@+id/Equal" 
       android:layout_width="77dp" 
       android:layout_height="95dp" 
       android:text="=" /> 
     </TableRow> 

    </LinearLayout>

這是CalculatorActivity：

package calculator.tt; 

import android.app.Activity; 
import android.os.Bundle; 
import android.text.InputType; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ImageButton; 


public class CalculatorActivity extends Activity { 

    EditText answer1; 
    String as; 
    char c; 
    double a, b, e; 
    boolean k; 
    Button addbutton; 
    Button subbutton; 
    Button divbutton; 
    Button mulbutton; 
    ImageButton x2button; 
    ImageButton x3button; 
    ImageButton sqrtbutton; 
    Button gtbutton; 
    Button opbutton; 
    Button clbutton; 
    Button dotbutton; 
    ImageButton minusbutton; 
    Button key0button; 
    Button key1button; 
    Button key2button; 
    Button key3button; 
    Button key4button; 
    Button key5button; 
    Button key6button; 
    Button key7button; 
    Button key8button; 
    Button key9button; 
    Button equalbutton; 

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

     /*Khai báo các lớp cho các button*/ 
     answer1 = (EditText)findViewById(R.id.answer); 
     answer1.setInputType(InputType.TYPE_NULL); 

     addbutton = (Button)findViewById(R.id.add); 
     addbutton.setOnClickListener(new AddbuttonHandler()); 

     subbutton = (Button)findViewById(R.id.sub); 
     subbutton.setOnClickListener(new SubbuttonHandler()); 

     divbutton = (Button)findViewById(R.id.div); 
     divbutton.setOnClickListener(new DivbuttonHandler()); 

     mulbutton = (Button)findViewById(R.id.mul); 
     mulbutton.setOnClickListener(new MulbuttonHandler()); 

     equalbutton = (Button)findViewById(R.id.answer); 
     equalbutton.setOnClickListener(new EqualbuttonHandler()); 

     sqrtbutton = (ImageButton)findViewById(R.id.sqrt); 
     sqrtbutton.setOnClickListener(new SqrtbuttonHandler()); 

     x2button = (ImageButton)findViewById(R.id.x2); 
     x2button.setOnClickListener(new X2buttonHandler()); 

     x3button = (ImageButton)findViewById(R.id.x3); 
     x3button.setOnClickListener(new X3buttonHandler()); 

     minusbutton = (ImageButton)findViewById(R.id.minus); 
     minusbutton.setOnClickListener(new MinusbuttonHandler()); 

     gtbutton = (Button)findViewById(R.id.giaithua); 
     gtbutton.setOnClickListener(new GtbuttonHandler()); 

     dotbutton = (Button)findViewById(R.id.dot); 
     dotbutton.setOnClickListener(new DotbuttonHandler()); 

     key0button = (Button)findViewById(R.id.key0); 
     key0button.setOnClickListener(new key0buttonHandler()); 

     key1button = (Button)findViewById(R.id.key1); 
     key1button.setOnClickListener(new key1buttonHandler()); 

     key2button = (Button)findViewById(R.id.key2); 
     key2button.setOnClickListener(new key2buttonHandler()); 

     key3button = (Button)findViewById(R.id.key3); 
     key3button.setOnClickListener(new key3buttonHandler()); 

     key4button = (Button)findViewById(R.id.key4); 
     key4button.setOnClickListener(new key4buttonHandler()); 

     key5button = (Button)findViewById(R.id.key5); 
     key5button.setOnClickListener(new key5buttonHandler()); 

     key6button = (Button)findViewById(R.id.key6); 
     key6button.setOnClickListener(new key6buttonHandler()); 

     key7button = (Button)findViewById(R.id.key7); 
     key7button.setOnClickListener(new key7buttonHandler()); 

     key8button = (Button)findViewById(R.id.key8); 
     key8button.setOnClickListener(new key8buttonHandler()); 

     key9button = (Button)findViewById(R.id.key9); 
     key9button.setOnClickListener(new key9buttonHandler()); 
     Log.e("Đang chạy đến đây","Xong khai bao cac lop"); 
    } 
    /* Các lớp cho button*/ 
    private class X2buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      k=true; 
      a = Double.parseDouble(answer1.getText().toString()); 
      answer1.setText(a*a+""); 

     } 
    } 
    private class X3buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      k=true; 
      a = Double.parseDouble(answer1.getText().toString()); 
      answer1.setText(a*a*a+""); 
     } 
    } 
    private class MinusbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      a = Double.parseDouble(answer1.getText().toString()); 
      answer1.setText(-a+""); 
     } 
    } 
    /*Tính căn bậc 2*/ 
    private class SqrtbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      k=true; 
      a = Double.parseDouble(answer1.getText().toString()); 
      b = Math.sqrt(a); 
      answer1.setText(b+""); 
     } 
    } 
    /*Tinh giai thua*/ 
    private class GtbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      k=true; 
      a = Double.parseDouble(answer1.getText().toString()); 
      b=1; 
      for (int i=1;i<a+1;i++) 
       { 
       b=b*i; 
       } 
      answer1.setText(b+""); 
     } 
    } 

    private class DotbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i; 
      as = answer1.getText().toString(); 
      if (k) 
       answer1.setText(""); 
      k=false; 
      /*Chi cho duy nhat 1 dau cham xuat hien*/ 
      for (i=0;i<as.length();i++)    
       if(as.charAt(i)==46) 
       { i=1; 
        break; 
       } 
      if (i!=1) 
       answer1.append("."); 
     } 
    } 
    private class key0buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("0"); 
      k=false; 
     } 
    } 
    private class key1buttonHandler implements OnClickListener{ 
     public void onClick (View v){    
      if (k) 
       answer1.setText("");  
      answer1.append("1"); 
      k=false; 
     } 
    } 
    private class key2buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText("");   
      answer1.append("2"); 
      k=false; 
     } 
    } 
    private class key3buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("3"); 
      k=false; 
     } 
    } 
    private class key4buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("4"); 
      k=false; 
     } 
    } 
    private class key5buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("5"); 
      k=false; 
     } 
    } 
    private class key6buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("6"); 
      k=false; 
     } 
    } 
    private class key7buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("7"); 
      k=false; 
     } 
    } 
    private class key8buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("8"); 
      k=false; 
     } 
    } 
    private class key9buttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      if (k) 
       answer1.setText(""); 
      answer1.append("9"); 
      k=false; 
     } 
    } 

    private class AddbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i,z=0; 
      String a1=null,a2=null; 
      for (i=0;i<as.length();i++) 
       if (as.charAt(i)==43||as.charAt(i)==42||as.charAt(i)==45||as.charAt(i)==47){ 
         a1 = as.substring(0,i-1); 
         a2 = as.substring(i+1,as.length()); 
         z=as.charAt(i); 
         break; 
        } 
      a = Double.parseDouble(a1); 
      b = Double.parseDouble(a2); 
      if (z==43) 
       answer1.setText(a+b + ""); 
      if (z==42) 
       answer1.setText(a*b + ""); 
      if (z==45) 
       answer1.setText(a-b + ""); 
      else answer1.setText(a/b + ""); 
      answer1.append("+"); 
    } 
} 
    private class MulbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i,z=0; 
      String a1=null,a2=null; 
      for (i=0;i<as.length();i++) 
       if (as.charAt(i)==43||as.charAt(i)==42||as.charAt(i)==45||as.charAt(i)==47){ 
         a1 = as.substring(0,i-1); 
         a2 = as.substring(i+1,as.length()); 
         z=as.charAt(i); 
         break; 
        } 
      a = Double.parseDouble(a1); 
      b = Double.parseDouble(a2); 
      if (z==43) 
       answer1.setText(a+b + ""); 
      if (z==42) 
       answer1.setText(a*b + ""); 
      if (z==45) 
       answer1.setText(a-b + ""); 
      else answer1.setText(a/b + ""); 
      answer1.append("*"); 
     } 
    } 
    private class SubbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i,z=0; 
      String a1=null,a2=null; 
      for (i=0;i<as.length();i++) 
       if (as.charAt(i)==43||as.charAt(i)==42||as.charAt(i)==45||as.charAt(i)==47){ 
         a1 = as.substring(0,i-1); 
         a2 = as.substring(i+1,as.length()); 
         z=as.charAt(i); 
         break; 
        } 
      a = Double.parseDouble(a1); 
      b = Double.parseDouble(a2); 
      if (z==43) 
       answer1.setText(a+b + ""); 
      if (z==42) 
       answer1.setText(a*b + ""); 
      if (z==45) 
       answer1.setText(a-b + ""); 
      else answer1.setText(a/b + ""); 
      answer1.append("-"); 
     } 
    } 
    private class DivbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i,z=0; 
      String a1=null,a2=null; 
      for (i=0;i<as.length();i++) 
       if (as.charAt(i)==43||as.charAt(i)==42||as.charAt(i)==45||as.charAt(i)==47){ 
         a1 = as.substring(0,i-1); 
         a2 = as.substring(i+1,as.length()); 
         z=as.charAt(i); 
         break; 
        } 
      a = Double.parseDouble(a1); 
      b = Double.parseDouble(a2); 
      if (z==43) 
       answer1.setText(a+b + ""); 
      if (z==42) 
       answer1.setText(a*b + ""); 
      if (z==45) 
       answer1.setText(a-b + ""); 
      else answer1.setText(a/b + ""); 
      answer1.append("/"); 
     } 
    } 
    private class EqualbuttonHandler implements OnClickListener{ 
     public void onClick (View v){ 
      int i,z=0; 
      String a1 = null, a2 = null; 
      k=true; 
      as = answer1.getText().toString(); 
      for (i=0;i<as.length();i++) 
       if (as.charAt(i)==43||as.charAt(i)==42||as.charAt(i)==45||as.charAt(i)==47){ 
         a1 = as.substring(0,i-1); 
         a2 = as.substring(i+1,as.length()); 
         z=as.charAt(i); 
         break; 
        } 
      a = Double.parseDouble(a1); 
      b = Double.parseDouble(a2); 
      if (z==43) 
       answer1.setText(a+b + ""); 
      if (z==42) 
       answer1.setText(a*b + ""); 
      if (z==45) 
       answer1.setText(a-b + ""); 
      else answer1.setText(a/b + ""); 
      } 
     } 
    }

來源

2012-06-05 Thèm Khát

請顯示您的課程「CalculatorActivity」。 Log cat在該類中顯示錯誤。 – PhatHV

我展示了我的課「CalculatorActivity」。謝謝！ –

請檢查Lance Nanek的回答。他指出了你獲得平等按鈕的Id的錯誤。 – PhatHV

在此Java行：
equalbutton =（按鈕）findViewById（R.id.answer）;

您正在查找該XML定義一個EditText：
<的EditText
機器人：ID = 「@ + ID /回答」

它看起來像你的意思是寫這個：
equalbutton =（Button）findViewById（R.id.Equal）;

來源

2012-06-05 02:49:38

當投下相同的按鈕時，他會得到錯誤的ID。（R.id.answer代替R.id.Equal）。你有一個快速的樣子。 ^^ – PhatHV

非常感謝！ –

@ThèmKhát：如果他解決了您的問題，請將答案標記爲已接受的答案。（P/s：cáidấustickcóhìnhchữVđó。^^） – PhatHV

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