佈局中存在多個錯誤。 <view>不能得到解決或無法在現場

Question

在運行temperatureconverter應用......在TemperatureConverter.java以下行

setContentView(R.layout.main); 
text = (EditText) findViewById(R.id.editText1); 
RadioButton celsiusButton = (RadioButton) findViewById(R.id.radio0); 
RadioButton fahrenheitButton = (RadioButton) findViewById(R.id.radio1); 

即時得到以下4個誤區：

• 主不能已解決或不是字段
• editText1無法解析或不是字段
• radio0無法解析或不是字段
• 收音機1不能得到解決或無法在現場

請幫我解決這些errors.i甲肝這是我的任務的項目。所以請... 該應用程序的整個源代碼已在下面給出。

1.main.xml 


<?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:background="@drawable/myshape" 
android:orientation="vertical" > 

<EditText 
android:id="@+id/editText1" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:inputType="numberSigned" > 
<requestFocus/> 
</EditText> 

<RadioGroup 
android:id="@+id/radioGroup1" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" > 

<RadioButton 
android:id="@+id/radio0" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:checked="true" 
android:text="@string/celsius" > 
</RadioButton> 

<RadioButton 
android:id="@+id/radio1" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text="@string/fahrenheit" > 
</RadioButton> 
</RadioGroup> 

<Button 
android:id="@+id/button1" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text="@string/calc" 
android:onClick="myClickHandler"> 
</Button> 

</LinearLayout> 



3.) res/drawable/myshape.xml: 
    <?xml version="1.0" encoding="UTF-8"?> 
<shape 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:shape="rectangle"> 
<stroke 
android:width="2dp" 
android:color="#FFFFFFFF" /> 
<gradient 
android:endColor="#DDBBBBBB" 
android:startColor="#DD777777" 
android:angle="90" /> 
<corners 
android:bottomRightRadius="7dp" 
android:bottomLeftRadius="7dp" 
android:topLeftRadius="7dp" 
android:topRightRadius="7dp" /> 
</shape> 

4.) res/values/strings.xml: 

<resources> 

<string name="hello_world">Hello world!</string> 
<string name="menu_settings">Settings</string> 
<string name="title_activity_convert_temperture_example">ConvertTempertureExample</string> 
<string name="app_name">Temparature Converter</string> 
<color name="myColor">#3399CC</color> 
<string name="myClickHandler">myClickHandler</string> 
<string name="celsius">to Celsius</string> 
<string name="fahrenheit">to Fahrenheit</string> 
<string name="calc">Calculate</string> 

</resources> 



5.) TemperatureConverter.java file 
package com.example.TemperatureConverter; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.RadioButton; 

import android.widget.RadioGroup; 
import android.widget.Toast; 
    import android.R; 
public class TempertureConverter extends Activity 
{ 
private EditText text; 

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
text = (EditText) findViewById(R.id.editText1); 

} 

// This method is called at button click because we assigned the name to the 
// "On Click property" of the button 
public void myClickHandler(View view) 
{ 
     switch (view.getId()) 
     { 
     case R.id.button1: 
RadioButton celsiusButton = (RadioButton) findViewById(R.id.radio0); 
RadioButton fahrenheitButton = (RadioButton) findViewById(R.id.radio1); 
if (text.getText().length() == 0) 
{ 
Toast.makeText(this, "Please enter a valid number", 
           Toast.LENGTH_LONG).show(); 
      return; 
} 

float inputValue = Float.parseFloat(text.getText().toString()); 
if (celsiusButton.isChecked()) 
{ 
text.setText(String 
.valueOf(convertFahrenheitToCelsius(inputValue))); 
celsiusButton.setChecked(false); 
fahrenheitButton.setChecked(true); 
} else { 
text.setText(String 
.valueOf(convertCelsiusToFahrenheit(inputValue))); 
fahrenheitButton.setChecked(false); 
celsiusButton.setChecked(true); 
} 
break; 
} 
} 

// Converts to celsius 
private float convertFahrenheitToCelsius(float fahrenheit) 
{ 
return ((fahrenheit - 32) * 5/9); 
} 

// Converts to fahrenheit 
private float convertCelsiusToFahrenheit(float celsius) 
{ 
return ((celsius * 9)/5) + 32; 
} 
} 

Answer 1

要導入的錯誤R檔：

import android.R; 

從代碼中刪除上面的行，並在項目的R檔的進口（可能com.example.TemperatureConverter.R更換）