Question

你好，我试图运行一个Android应用程序，我从android工作室制作到我的moto g手机......但它一直在告诉，不幸的是，＆＃34; Expence已停止＆＃34; ...它指向我的android maifest文件请帮助我

这是主要活动

package com.example.vikki.expense;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;


public class MainActivity extends Activity {
    EditText salary ;
    EditText net;
    EditText petrol;
    EditText cw;
    EditText food;
    EditText expence;
    Button next;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //find the value by id
        salary = (EditText) findViewById(R.id.editText);
        net = (EditText) findViewById(R.id.editText2);
        petrol = (EditText) findViewById(R.id.editText3);
        cw = (EditText) findViewById(R.id.editText4);
        food = (EditText) findViewById(R.id.editText5);
        next = (Button) findViewById(R.id.button);


        next.setOnClickListener((View.OnClickListener) this);



    }
     public void onClick(View v ) {

         // TODO Auto-generated method stub
         float num1 = 0;
         float num2 = 0;
         float num3 = 0;
         float num4 = 0;
         float num5 = 0;
         float result = 0;




         // read EditText and fill variables with numbers
         num1 = Float.parseFloat(salary.getText().toString());
         num2 = Float.parseFloat(net.getText().toString());
         num3 = Float.parseFloat(petrol.getText().toString());
         num4 = Float.parseFloat(cw.getText().toString());
         num5 = Float.parseFloat(food.getText().toString());

         result = num1+num2+num3+num4+num5;

         Intent intent = new Intent(getApplicationContext(),Activity2.class);
         startActivity(intent);









     }




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

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

这是我的清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.vikki.expense"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="21"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.vikki.expense.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.vikki.expense.Activity2"
            android:label="@string/title_activity_activity2" >
        </activity>
    </application>

这是xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

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

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/editText"
        android:layout_below="@+id/textView"
        android:layout_toEndOf="@+id/textView"
        android:layout_marginTop="49dp" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/editText2"
        android:layout_marginTop="29dp"
        android:layout_below="@+id/editText"
        android:layout_alignStart="@+id/editText" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/editText3"
        android:layout_centerVertical="true"
        android:layout_alignStart="@+id/editText2" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/editText4"
        android:layout_marginTop="37dp"
        android:layout_below="@+id/editText3"
        android:layout_alignStart="@+id/editText3" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/editText5"
        android:layout_marginTop="30dp"
        android:layout_below="@+id/editText4"
        android:layout_alignStart="@+id/editText4" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/ex1"
        android:id="@+id/textView2"
        android:layout_above="@+id/editText2"
        android:layout_toStartOf="@+id/textView" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/ex2"
        android:id="@+id/textView3"
        android:layout_alignBottom="@+id/editText2"
        android:layout_alignStart="@+id/textView2" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:id="@+id/textView4"
        android:layout_alignBottom="@+id/editText3"
        android:layout_alignStart="@+id/textView3"
        android:text="@string/ex3" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/ex4"
        android:id="@+id/textView5"
        android:layout_above="@+id/editText5"
        android:layout_alignStart="@+id/textView4" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/ex5"
        android:id="@+id/textView6"
        android:layout_alignBottom="@+id/editText5"
        android:layout_alignStart="@+id/textView5" />

    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/next"
        android:id="@+id/button"
        android:layout_below="@+id/textView6"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

Answer 1

如果您使用View.OnClickListener

，MainActivity应该实现next.setOnClickListener(this);

Answer 2

我觉得很有趣，在没有崩溃的情况下调试这个问题...

我认为问题在于布局。

在您的布局中使用 editText2 ，您正在使用 TextView -s并将它们转换为代码中的 EditText 。恕我直言，它不会工作。在代码中使用TextView或在需要时将TextView更改为布局文件中的EditText

Android应用程序在尝试运行时崩溃

2 个答案: