Question

好吧，我还不能发布图片：/

基本上，我有一个带有三个edittext字段，三个复选框，一个计算按钮和一个文本字段的应用程序来输出答案。我希望程序扫描以查看缺少哪个值，以便从中知道它应该执行哪个计算。另一种方法是让用户检查其中一个复选框，然后程序只运行相应复选框的计算。例如，如果用户输入Q = 10，T = 2，并选中I的复选框，程序将进行数学运算并显示I = 20？这很有道理我在伪代码中使用它看起来像 “如果选中复选框1并输入了Q和T的值，则计算I的值并显示在答案字段中”但是我将在那里添加一些错误检查和验证方法。如果你需要xml文件和java文件那么请问，我只是在寻找一种方法，我怎么能做到这一点，我不希望你们都浪费你的空闲时间为我编写一个完整的程序。欢呼男人和女孩

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background1"
android:gravity="fill"
android:orientation="vertical"
android:textColor="#ffffff"
tools:context=".CurrentPage" >

<!--
     The primary full-screen view. This can be replaced with whatever view
     is needed to present your content, e.g. VideoView, SurfaceView,
     TextureView, etc.
-->


<!--
     This FrameLayout insets its children based on system windows using
     android:fitsSystemWindows.

-->

    <TextView
        android:id="@+id/Current_hint"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:layout_marginTop="33dp"
        android:text="Welcome to the Current Calculation page."Hint - Use the check boxes to find the values that are missing "
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="#ffffff"
        tools:ignore="HardcodedText" />

    <TextView
        android:id="@+id/Equation_letter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/current_calculate"
        android:layout_marginTop="37dp"
        android:layout_toLeftOf="@+id/current_calculate"
        android:text="     HELLO  "
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ffffff"
        tools:ignore="HardcodedText" />

    <TextView
        android:id="@+id/Distances_answer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/Equation_letter"
        android:layout_alignBottom="@+id/Equation_letter"
        android:layout_alignLeft="@+id/current_calculate"
        android:layout_alignParentRight="true"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ffffff" />

    <TextView
        android:id="@+id/t"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Q"
        android:layout_alignRight="@+id/Q"
        android:layout_below="@+id/Q"
         android:layout_marginTop="36dp"
        android:gravity="right|top"
        android:text="t ="
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ffffff"
        tools:ignore="HardcodedText" />

    <CheckBox
        android:id="@+id/custom3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/t"
        android:layout_alignLeft="@+id/custom2"
        android:background="@drawable/check_box_new"
        android:button="@drawable/check_box_new" />

    <CheckBox
        android:id="@+id/custom1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/number_input_3"
        android:layout_alignLeft="@+id/custom3"
        android:background="@drawable/check_box_new"
        android:button="@drawable/check_box_new" />

    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Current_hint"
        android:layout_alignRight="@+id/Current_hint"
        android:layout_below="@+id/Equation_letter"
        android:layout_marginTop="25dp" >

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

            <TextView
                android:id="@+id/CurrentmainHelp"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1.31"
                android:text="HELP! This equation can be used to calculate the current of an object in amps. The correct equation to discover amps is I=Q/t. Where I = current, Q = charge flowing past a point in the circuit, and t = time taken for the charge to flow. Please note, Q is measure in coulombs and t is measured in seconds, with I being measured in amperes.

    Still need more help? "
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textSize="18sp"
                tools:ignore="HardcodedText" />

            <Button
                android:id="@+id/Yes_Please"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginBottom="36dp"
                android:layout_weight="1.31"
                android:onClick="CurrentHelp"
                android:text="Yes Please"
                android:textColor="#ffffff" />

        </LinearLayout>

    </ScrollView>

    <Button
        android:id="@+id/current_calculate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/Calculate_Current"
        android:textColor="#ffffff" 

        />

    <EditText
        android:id="@+id/number_input_2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_above="@+id/t"
        android:layout_alignLeft="@+id/number_input_1"
        android:layout_alignRight="@+id/number_input_1"
        android:ems="10"
        android:focusable="true"
        android:inputType="numberDecimal"
        android:textColor="#ffffff" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/number_input_3"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/t"
        android:layout_alignLeft="@+id/number_input_2"
        android:layout_alignRight="@+id/number_input_2"
        android:ems="10"
        android:focusable="true"
        android:inputType="numberDecimal"
        android:textColor="#ffffff" />

    <CheckBox
        android:id="@+id/custom2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/number_input_1"
        android:layout_marginLeft="45dp"
        android:layout_toRightOf="@+id/number_input_1"
        android:background="@drawable/check_box_new"
        android:button="@drawable/check_box_new" />

    <EditText
        android:id="@+id/number_input_1"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:layout_above="@+id/Q"
        android:layout_alignRight="@+id/current_calculate"
        android:ems="10"
        android:focusable="false"
        android:inputType="numberDecimal"
        android:singleLine="true"
        android:textColor="#ffffff" />

    <TextView
        android:id="@+id/Q"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Equation_letter"
        android:layout_below="@+id/I"
        android:layout_marginTop="36dp"
        android:gravity="right|top"
        android:text="Q ="
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ffffff"
        tools:ignore="HardcodedText" />

    <TextView
        android:id="@+id/I"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Q"
        android:layout_alignRight="@+id/Q"
        android:layout_below="@+id/Current_hint"
        android:layout_marginTop="65dp"
        android:gravity="right|top"
        android:text="I ="
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#ffffff"
        tools:ignore="HardcodedText" />

好吧，那是xml，到目前为止这是java

    package com.kieran.whetherfieldphysicscalculator;

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


import android.support.v4.app.NavUtils;
// i=q/t this will be the first calculation on the list 



public class Current extends Activity {





        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_current);
            // Show the Up button in the action bar.
            setupActionBar();


          Button calc1 = (Button)findViewById(R.id.current_calculate);

            calc1.setOnClickListener(new View.OnClickListener() {


                 public void onClick(View v) {

                    EditText Charge1 = (EditText)findViewById(R.id.number_input_2);    
                    EditText Time1 = (EditText)findViewById(R.id.number_input_3);
                    TextView Distances_answer = (TextView)findViewById(R.id.Distances_answer);
                    double charge = Double.parseDouble(Charge1.getText().toString());
                    double time = Double.parseDouble(Time1.getText().toString());
        //Time is a class in Java
                    Distances_answer.setText("" +charge*time);

                }
            });
        }









    public void CurrentHelp(View view) {
        // Do something in response to button
        Intent intent = new Intent(this, CurrentHelp.class);
        startActivity(intent);
    }
    /**
     * Set up the {@link android.app.ActionBar}.
     */
    private void setupActionBar() {

        getActionBar().setDisplayHomeAsUpEnabled(true);

    }



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            // This ID represents the Home or Up button. In the case of this
            // activity, the Up button is shown. Use NavUtils to allow users
            // to navigate up one level in the application structure. For
            // more details, see the Navigation pattern on Android Design:
            //
            // http://developer.android.com/design/patterns/navigation.html#up-vs-back
            //
            NavUtils.navigateUpFromSameTask(this);
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


}

我在问是否有更简单的方法来合成程序来查找值，而不是必须编写每个单独的段？欢呼声

Answer 1

在您的情况下，我猜您希望用户只选中一个复选框，并且只应向用户显示与该复选框对应的答案。
因此，您需要在复选框上设置OnClickListener，以便选择相应的操作阅读here，了解如何在复选框上设置监听器并使用它。特别要查找addListenerOnChkIos（）方法，因为它具有您想要的代码还要在计算按钮上设置另一个OnClickListener，并在该检查中选中哪个复选框，具体取决于您将执行操作并更新textview。

Java物理三角形

1 个答案: