如何使用帶文本視圖列表的單選按鈕

我開發了一個android應用程序，用戶可以將用戶選定單元的速度轉換爲其他單位。如何使用帶文本視圖列表的單選按鈕

的接口是如下：

當用戶輸入的值，並選擇一個單選按鈕，則0的隔壁textviews應顯示所轉換的單位。

到目前爲止，我已經完成了

的Java代碼如下：

package com.firstapplication.aditya.multicalc; 

import android.app.Activity; 
import android.content.Intent; 
import android.graphics.Typeface; 
import android.os.Bundle; 
import android.view.View; 
import android.view.Window; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.TextView; 



public class Speed_Converter extends Activity implements View.OnClickListener{ 

Typeface font; 
EditText txtOne; 
TextView valueOne, valueTwo, valueThree, valueFour, valueFive; 
Button main; 
RadioGroup radioButtonGroup; 
RadioButton radioOne, radioTwo, radioThree, radioFour, radioFive; 
double valOne, valTwo, valThree, valFour, valFive; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    this.requestWindowFeature(Window.FEATURE_NO_TITLE); 

    setContentView(R.layout.speed_converter); 

    font = Typeface.createFromAsset(getAssets(),"fonts/Aliquam.ttf"); 
    initialize(); 



    main.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(Speed_Converter.this, Main.class); 
      intent.putExtra("a", true); 
      startActivity(intent); 

     } 
    }); 

    radioButtonGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { 
     @Override 
     public void onCheckedChanged(RadioGroup group, int checkedId) { 

      int id = radioButtonGroup.getCheckedRadioButtonId(); 
      View radioButton = radioButtonGroup.findViewById(id); 
      if(radioButton.getId() == R.id.radio1) 
      { 
       calculateOne(); 
      } 
      if(radioButton.getId() == R.id.radio2) 
      { 
       calculateTwo(); 
      } 
      if(radioButton.getId() == R.id.radio3) 
      { 
       calculateThree(); 
      } 
      if(radioButton.getId() == R.id.radio4) 
      { 
       calculateFour(); 
      } 
      if(radioButton.getId() == R.id.radio5) 
      { 
       calculateFive(); 
      } 
     } 
    }); 


} 

private void initialize() 
{ 

    main = (Button) findViewById(R.id.button38); 

    txtOne = (EditText)findViewById(R.id.textView4); 


    radioOne = (RadioButton) findViewById(R.id.radio1); 
    radioTwo = (RadioButton) findViewById(R.id.radio2); 
    radioThree = (RadioButton) findViewById(R.id.radio3); 
    radioFour = (RadioButton) findViewById(R.id.radio4); 
    radioFive = (RadioButton) findViewById(R.id.radio5); 


    valueOne = (TextView)findViewById(R.id.textView22); 
    valueTwo = (TextView)findViewById(R.id.textView28); 
    valueThree = (TextView)findViewById(R.id.textView26); 
    valueFour = (TextView)findViewById(R.id.textView29); 
    valueFive = (TextView)findViewById(R.id.textView31); 

    radioButtonGroup = (RadioGroup)findViewById(R.id.radioGroup1); 


} 


private void calculateOne() 
{ 
    valOne = Double.parseDouble(txtOne.toString()); 
    valueOne.setText("" + valOne); 

    valTwo = Double.parseDouble(txtOne.toString())*767.269; 
    valueTwo.setText("" + valTwo); 

    valThree = Double.parseDouble(txtOne.toString())*666.739; 
    valueThree.setText("" + valThree); 

    valFour = Double.parseDouble(txtOne.toString())*1234.8; 
    valueFour.setText("" + valFour); 

    valFive = Double.parseDouble(txtOne.toString())*343; 
    valueFive.setText("" + valFive); 
} 

private void calculateTwo() 
{ 
    valOne = Double.parseDouble(txtOne.toString())*1234.8; 
    valueOne.setText("" + valOne); 

    valTwo = (Double.parseDouble(txtOne.toString())); 
    valueTwo.setText("" + valTwo); 

    valThree = Double.parseDouble(txtOne.toString())*343; 
    valueThree.setText("" + valThree); 

    valFour = (Double.parseDouble(txtOne.toString()))*666.739; 
    valueFour.setText("" + valFour); 

    valFive = Double.parseDouble(txtOne.toString())*767.269; 
    valueFive.setText("" + valFive); 
} 

private void calculateThree() 
{ 
    valOne = Double.parseDouble(txtOne.toString())*3.6; 
    valueOne.setText("" + valOne); 

    valTwo = Double.parseDouble(txtOne.toString())*0.0029; 
    valueTwo.setText("" + valTwo); 

    valThree = Double.parseDouble(txtOne.toString()); 
    valueThree.setText("" + valThree); 

    valFour = Double.parseDouble(txtOne.toString())*1.944; 
    valueFour.setText("" + valFour); 

    valFive = Double.parseDouble(txtOne.toString())*2.237; 
    valueFive.setText("" + valFive); 
} 

private void calculateFour() 
{ 
    valOne = Double.parseDouble(txtOne.toString()); 
    valueOne.setText("" + valOne); 

    valTwo = Double.parseDouble(txtOne.toString())*0.0008; 
    valueTwo.setText("" + valTwo); 

    valThree = Double.parseDouble(txtOne.toString())*0.278; 
    valueThree.setText("" + valThree); 

    valFour = Double.parseDouble(txtOne.toString())*0.54; 
    valueFour.setText("" + valFour); 

    valFive = Double.parseDouble(txtOne.toString())*0.621; 
    valueFive.setText("" + valFive); 
} 

private void calculateFive() 
{ 
    valOne = Double.parseDouble(txtOne.toString())*1.609; 
    valueOne.setText("" + valOne); 

    valTwo = Double.parseDouble(txtOne.toString())*0.0013; 
    valueTwo.setText("" + valTwo); 

    valThree = Double.parseDouble(txtOne.toString())*0.447; 
    valueThree.setText("" + valThree); 

    valFour = Double.parseDouble(txtOne.toString())*0.869; 
    valueFour.setText("" + valFour); 

    valFive = Double.parseDouble(txtOne.toString()); 
    valueFive.setText("" + valFive); 
} 



@Override 
public void onClick(View v) { 

} 


}

而對於上述設計的XML如下：

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

<Button 
    android:id="@+id/btnHeader" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="#0000" 
    android:text="SPEED CONVERTER" 
    android:textColor="#FFFFFF" 
    android:textSize="20dp" /> 

<EditText 
    android:id="@+id/textView4" 
    android:layout_width="match_parent" 
    android:layout_height="40dp" 
    android:inputType="numberDecimal" 
    android:background="#FFFFFF" 
    android:text=""/> 

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



    <RelativeLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/radioGroup" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:layout_gravity="top|left"> 

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

     <RadioButton 
      android:id="@+id/radio1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="25dp" 
      android:layout_marginLeft="170dp" 
      android:text="Mach" 
      android:textColor="#FFFFFF"/> 

      <RadioButton 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Miles per Hour" 
       android:textColor="#FFFFFF" 
       android:id="@+id/radio2" 
       android:layout_marginLeft="170dp"/> 

      <RadioButton 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Knot" 
       android:textColor="#FFFFFF" 
       android:id="@+id/radio3" 
       android:layout_marginLeft="170dp"/> 

      <RadioButton 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Kilometers per Hour" 
       android:textColor="#FFFFFF" 
       android:id="@+id/radio4" 
       android:layout_marginLeft="170dp"/> 

      <RadioButton 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="Meters per Second" 
       android:textColor="#FFFFFF" 
       android:id="@+id/radio5" 
       android:layout_marginLeft="170dp"/> 

     </RadioGroup> 

    </RelativeLayout> 



    <Button 
     android:id="@+id/button37" 
     android:layout_width="match_parent" 
     android:layout_height="1dp" 
     android:background="#FFFFFF" 
     android:layout_gravity="center_horizontal" 
     android:text="" 
     android:layout_above="@+id/button38" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 
    <Button 
     android:id="@+id/button38" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:background="#0000" 
     android:layout_gravity="center_horizontal" 
     android:text="Main Menu" 
     android:textColor="#FFFFFF" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="0" 
     android:textSize="20dp" 
     android:gravity="right" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView22" 
     android:layout_below="@+id/radioGroup" 
     android:layout_alignLeft="@+id/textView26" 
     android:layout_alignStart="@+id/textView26" 
     android:layout_marginTop="33dp" /> 

    <TextView 
     android:layout_width="200dp" 
     android:layout_height="wrap_content" 
     android:text="Miles per Hour " 
     android:textSize="20dp" 
     android:textColor="#FFFFFF" 
     android:gravity="right" 
     android:id="@+id/textView23" 
     android:layout_above="@+id/textView25" 
     android:layout_alignLeft="@+id/textView25" 
     android:layout_alignStart="@+id/textView25" /> 


    <TextView 
     android:layout_width="200dp" 
     android:layout_height="wrap_content" 
     android:text="Knot " 
     android:textSize="20dp" 
     android:gravity="right" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView25" 
     android:layout_above="@+id/textView27" 
     android:layout_alignLeft="@+id/textView27" 
     android:layout_alignStart="@+id/textView27" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="0" 
     android:textSize="20dp" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView26" 
     android:layout_alignTop="@+id/textView25" 
     android:layout_toRightOf="@+id/textView25" 
     android:layout_toEndOf="@+id/textView25" /> 

    <TextView 
     android:layout_width="200dp" 
     android:layout_height="wrap_content" 
     android:text="Kilometers per Hour " 
     android:textSize="20dp" 
     android:gravity="right" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView27" 
     android:layout_above="@+id/textView30" 
     android:layout_toLeftOf="@+id/textView31" 
     android:layout_toStartOf="@+id/textView31" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="0" 
     android:textSize="20dp" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView28" 
     android:layout_below="@+id/textView22" 
     android:layout_alignLeft="@+id/textView26" 
     android:layout_alignStart="@+id/textView26" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="0" 
     android:textSize="20dp" 
     android:id="@+id/textView29" 
     android:textColor="#FFFFFF" 
     android:layout_below="@+id/textView25" 
     android:layout_toRightOf="@+id/textView27" 
     android:layout_toEndOf="@+id/textView27" /> 

    <TextView 
     android:layout_width="200dp" 
     android:layout_height="wrap_content" 
     android:text="Meters per Second " 
     android:textSize="20dp" 
     android:gravity="right" 
     android:id="@+id/textView30" 
     android:textColor="#FFFFFF" 
     android:layout_above="@+id/button37" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_marginLeft="42dp" 
     android:layout_marginStart="42dp" 
     android:layout_marginBottom="39dp" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="0" 
     android:textSize="20dp" 
     android:id="@+id/textView31" 
     android:textColor="#FFFFFF" 
     android:layout_alignBaseline="@+id/textView30" 
     android:layout_alignBottom="@+id/textView30" 
     android:layout_toRightOf="@+id/textView30" 
     android:layout_toEndOf="@+id/textView30" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Mach " 
     android:textSize="20dp" 
     android:textColor="#FFFFFF" 
     android:id="@+id/textView21" 
     android:gravity="right" 
     android:layout_above="@+id/textView23" 
     android:layout_alignRight="@+id/textView23" 
     android:layout_alignEnd="@+id/textView23" /> 


</RelativeLayout> 

</LinearLayout>

但是，應用程序當我運行停止應用程序並在EditText中設置一個值並選擇一個單選按鈕。

任何幫助，將不勝感激。

的logcat的情況如下：

11-16 23:29:44.136 17088-17088/com.firstapplication.aditya.multicalc I/art﹕ Late-enabling -Xcheck:jni 
11-16 23:29:44.346 17088-17108/com.firstapplication.aditya.multicalc D/OpenGLRenderer﹕ Render dirty regions requested: false 
11-16 23:29:44.356 17088-17088/com.firstapplication.aditya.multicalc D/Atlas﹕ Validating map... 
11-16 23:29:44.426 17088-17108/com.firstapplication.aditya.multicalc D/libEGL﹕ loaded /system/lib/egl/libEGL_mali.so 
11-16 23:29:44.431 17088-17108/com.firstapplication.aditya.multicalc D/libEGL﹕ loaded /system/lib/egl/libGLESv1_CM_mali.so 
11-16 23:29:44.476 17088-17108/com.firstapplication.aditya.multicalc D/libEGL﹕ loaded /system/lib/egl/libGLESv2_mali.so 
11-16 23:29:44.526 17088-17108/com.firstapplication.aditya.multicalc E/﹕ Device driver API match 
    Device driver API version: 23 
    User space API version: 23 
11-16 23:29:44.526 17088-17108/com.firstapplication.aditya.multicalc E/﹕ mali: REVISION=Linux-r3p2-01rel3 BUILD_DATE=Wed Oct 9 21:05:57 KST 2013 
11-16 23:29:44.526 17088-17108/com.firstapplication.aditya.multicalc I/OpenGLRenderer﹕ Initialized EGL, version 1.4 
11-16 23:29:44.531 17088-17108/com.firstapplication.aditya.multicalc D/OpenGLRenderer﹕ Enabling debug mode 0 
11-16 23:29:44.816 17088-17088/com.firstapplication.aditya.multicalc I/Timeline﹕ Timeline: Activity_idle id: [email protected] time:68917579 
11-16 23:29:52.831 17088-17088/com.firstapplication.aditya.multicalc I/Timeline﹕ Timeline: Activity_launch_request id:com.firstapplication.aditya.multicalc time:68925592 
11-16 23:29:52.996 17088-17103/com.firstapplication.aditya.multicalc I/art﹕ Background sticky concurrent mark sweep GC freed 8779(383KB) AllocSpace objects, 1(12KB) LOS objects, 6% free, 5MB/6MB, paused 5.518ms total 43.500ms 
11-16 23:29:53.211 17088-17088/com.firstapplication.aditya.multicalc I/Timeline﹕ Timeline: Activity_idle id: [email protected] time:68925974 
11-16 23:29:55.841 17088-17088/com.firstapplication.aditya.multicalc I/Timeline﹕ Timeline: Activity_launch_request id:com.firstapplication.aditya.multicalc time:68928601 
11-16 23:29:56.341 17088-17088/com.firstapplication.aditya.multicalc I/Timeline﹕ Timeline: Activity_idle id: [email protected] time:68929103 
11-16 23:30:02.826 17088-17088/com.firstapplication.aditya.multicalc W/IInputConnectionWrapper﹕ showStatusIcon on inactive InputConnection

來源

2015-11-16 user3798791

請問您可以發佈logcat .. – Lal

下面的代碼

valOne = Double.parseDouble(txtOne.toString());

將無法正常工作像預期的，因爲這樣一來，你試圖解析的EditText對象txtOne的字符串表示」。相反，你必須寫

valOne = Double.parseDouble(txtOne.getText().toString());

爲了獲得用戶輸入。

來源

2015-11-16 18:20:51 0X0nosugar

Thyaks很多0X0nosugar – user3798791

如何使用帶文本視圖列表的單選按鈕

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