Question

我有这个问题突然出现几次，我无法弄清楚为什么会发生这种情况。发生了什么事情是在我的TextView框周围移动一些东西后，最终在EditText框的顶部，这是不好的。所以我去了TextView框移动到屏幕的底部。当我这样做时，当我试图访问皮卡时，应用程序会崩溃。但是，如果我再次将TextView框移动到顶部，它工作正常..我真的不明白。无论如何，这是我得到的错误

06-22 09:06:41.928: E/AndroidRuntime(10958): java.lang.RuntimeException: Unable to
 start activity ComponentInfo{net.finalexam/net.finalexam.Piggy}: 
 java.lang.ClassCastException: android.widget.RadioButton

这是小猪xml文件

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/piggy" >

    <EditText
        android:id="@+id/txtQuarters"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="27dp"
        android:ems="10"
        android:hint="Number of quarters"
        android:inputType="number" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/txtDimes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txtQuarters"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:hint="Number of dimes"
        android:inputType="number" />

    <EditText
        android:id="@+id/txtNickles"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txtDimes"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:hint="Number of nickles"
        android:inputType="number" />

    <EditText
        android:id="@+id/txtPennies"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txtNickles"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:hint="Number of pennies"
        android:inputType="number" />


    <EditText
        android:id="@+id/txtDollars"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txtPennies"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:hint="Number of Dollars"
        android:inputType="number" />

    <RadioGroup
        android:id="@+id/radioGroup1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txtDollars"
        android:layout_centerHorizontal="true" >

        <RadioButton
            android:id="@+id/radAdd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="Add" />

        <RadioButton
            android:id="@+id/radSubtract"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Subtract" />
    </RadioGroup>

    <Button
        android:id="@+id/btnCalculate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/radioGroup1"
        android:layout_centerHorizontal="true"
        android:text="Calculate" />

    <TextView
        android:id="@+id/txtResults"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btnCalculate"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="27dp"
        android:textSize="40sp" android:textStyle="bold" android:textColor="#000000"/>

</RelativeLayout>

这是Piggy Java文件

package net.finalexam;

import java.text.DecimalFormat;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;

public class Piggy extends Activity
{
  double quartersValue = .25;
  double dimesValue = .10;
  double nicklesValue = .05;
  double penniesValue = .01;
  double dollarsValue = 1;
  double quartersMoney;
  double dollarsMoney;
  double dimesMoney;
  double nicklesMoney;
  double penniesMoney;
  double totalMoney;
  double newTotalMoney;
  double oldTotalMoney = 0;
  int numberOfQuarters;
  int numberOfDimes;
  int numberOfNickles;
  int numberOfPennies;
  int numberOfDollars;



  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.piggybank);
    final EditText quarters = (EditText) findViewById(R.id.txtQuarters);
    final EditText dimes = (EditText) findViewById(R.id.txtDimes);
    final EditText nickles = (EditText) findViewById(R.id.txtNickles);
    final EditText pennies = (EditText) findViewById(R.id.txtPennies);
    final EditText dollars = (EditText) findViewById(R.id.txtDollars);
    Button calculate = (Button) findViewById(R.id.btnCalculate);
    final TextView results = ((TextView) findViewById(R.id.txtResults));
    final RadioButton add = (RadioButton) findViewById(R.id.radAdd);
    final RadioButton subtract = (RadioButton) findViewById(R.id.radSubtract);

    calculate.setOnClickListener(new OnClickListener()
    {

      public void onClick(View v)
      {
        if (quarters.getText().toString().equals(""))
        {
          numberOfQuarters = 0;
        }
        else
        {
          numberOfQuarters = Integer.parseInt(quarters.getText().toString());
        }

        if (dimes.getText().toString().equals(""))
        {
          numberOfDimes = 0;
        }
        else
        {
          numberOfDimes = Integer.parseInt(dimes.getText().toString());
        }

        if (nickles.getText().toString().equals(""))
        {
          numberOfNickles = 0;
        }
        else
        {
          numberOfNickles = Integer.parseInt(nickles.getText().toString());
        }

        if (pennies.getText().toString().equals(""))
        {
          numberOfPennies = 0;
        }
        else
        {
          numberOfPennies = Integer.parseInt(pennies.getText().toString());
        }

        if (dollars.getText().toString().equals(""))
        {
          numberOfDollars = 0;
        }
        else
        {
          numberOfDollars = Integer.parseInt(dollars.getText().toString());
        }
        quartersMoney = numberOfQuarters * quartersValue;
        dimesMoney = numberOfDimes * dimesValue;
        nicklesMoney = numberOfNickles * nicklesValue;
        penniesMoney = numberOfPennies * penniesValue;
        dollarsMoney = numberOfDollars;
        totalMoney = quartersMoney + dimesMoney + nicklesMoney + penniesMoney + dollarsMoney;
        DecimalFormat currency = new DecimalFormat("$###,###.##");

        if (add.isChecked())
        {
          if (totalMoney > 0)
          {
            newTotalMoney = oldTotalMoney + totalMoney;
            oldTotalMoney = newTotalMoney;
            results.setText(currency.format(newTotalMoney));
          }
          else
          {
            Toast.makeText(Piggy.this, "You need to do more chores!!", Toast.LENGTH_LONG).show();

          }
        }
        if (subtract.isChecked())
        {
          newTotalMoney = oldTotalMoney - totalMoney;
        }
        if (newTotalMoney > 0)
        {

          oldTotalMoney = newTotalMoney;
          results.setText(currency.format(newTotalMoney));
        }
        else
        {
          Toast.makeText(Piggy.this, "Save more money kido!!", Toast.LENGTH_LONG).show();
        };
      }
    });
  }

}

我已经找到了答案，但他们似乎都是略有不同的情况。有任何想法吗？谢谢。就像我说的，如果TextView框与Quartven EditText框重叠，这样可以正常工作。

编辑1这是存钱罐之前的屏幕

main.xml中

<?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"
    >
    <ImageView
            android:id="@+id/ic_launcher_money"
            android:layout_width="100px"
            android:layout_height="100px"
            android:layout_marginLeft="4px"
            android:layout_marginRight="10px"
            android:layout_marginTop="2px"
            android:src="@drawable/ic_launcher_money"></ImageView>

    <TextView
        android:id="@+id/bankses"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/bankses"
        android:textSize="25sp">

    </TextView>
</LinearLayout>

Main.java

package net.finalexam;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class Main extends ListActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        String[] banks ={"Piggy Bank","Adult Bank"};
        setListAdapter(new ArrayAdapter<String>(this,R.layout.main, R.id.bankses, banks));
    }
    protected void onListItemClick(ListView l, View v, int position, long id){
        switch(position){
        case 0:
            startActivity(new Intent(Main.this,Piggy.class));
            break;
        case 1:
            startActivity(new Intent(Main.this,Adultbank.class));
            break;
        }
    }

}

Answer 1

尝试在Eclipse上清理项目。它经常解决这类问题。

移动TextView Box使我的Android应用程序崩溃

1 个答案: