BMI计算器应用程序

Question

我是android新手。我做了一个BMI计算器。它工作正常。但我想放置一些图形或动画。例如，如果BMI结果是UNDERWEIGHT，则UNDERWEIGHT图片的图像将弹出。请帮忙。

这里是我的activity_sample.xml

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

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/weightLabel" 
    android:textAppearance="?android:attr/textAppearanceMedium" /> 

<EditText 
    android:id="@+id/weightText" 
    android:layout_width="70dp" 
    android:layout_height="50dp" 
    android:layout_alignRight="@+id/textView1" 
    android:layout_below="@+id/textView1" 
    android:layout_marginRight="14dp" 
    android:layout_marginTop="14dp" 
    android:ems="10" 
    android:inputType="number" 
    android:maxLength="3" 
    android:text="@string/weightText" > 

    <requestFocus /> 
</EditText> 

<TextView 
    android:id="@+id/textView2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBaseline="@+id/textView1" 
    android:layout_alignBottom="@+id/textView1" 
    android:layout_marginLeft="45dp" 
    android:layout_toRightOf="@+id/textView1" 
    android:text="@string/heightLabel" 
    android:textAppearance="?android:attr/textAppearanceMedium" /> 

<EditText 
    android:id="@+id/heightText" 
    android:layout_width="70dp" 
    android:layout_height="50dp" 
    android:layout_alignBaseline="@+id/weightText" 
    android:layout_alignBottom="@+id/weightText" 
    android:layout_alignRight="@+id/textView2" 
    android:ems="10" 
    android:inputType="number" 
    android:maxLength="2" 
    android:text="@string/heightText" /> 

<TextView 
    android:id="@+id/gender" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/weightText" 
    android:layout_marginTop="16dp" 
    android:text="@string/genderLabel" 
    android:textAppearance="?android:attr/textAppearanceMedium" /> 

<Button 
    android:id="@+id/calculateButton" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/heightText" 
    android:layout_alignTop="@+id/gender" 
    android:onClick="calculateClickHandler" 
    android:text="@string/calculateButton" /> 

<RadioGroup 
    android:id="@+id/rdGroup" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignTop="@+id/gender" 
    android:layout_toRightOf="@+id/gender" > 

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

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

<TextView 
    android:id="@+id/yourBMI" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/gender" 
    android:layout_centerVertical="true" 
    android:textStyle="bold" 
    android:text="@string/yourBMI" /> 

<TextView 
    android:id="@+id/resultLabel" 
    android:layout_width="wrap_content" 
    android:layout_height="55dp" 
    android:layout_alignBaseline="@+id/yourBMI" 
    android:layout_alignBottom="@+id/yourBMI" 
    android:layout_alignRight="@+id/calculateButton" 
    android:layout_toRightOf="@+id/weightText" 
    android:text="@string/emptyString" 
    android:textColor="#000000" 
    android:textStyle="bold" /> 

<FrameLayout 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/frameLayout" 
    android:background="#b2ff7c"> 

这里是我的SampleActivity.java

package com.sample.sample; 



import android.os.Bundle; 
import android.app.Activity; 
import android.view.View; 

import android.view.Menu; 


import android.widget.EditText; 
import android.widget.TextView; 

public class SampleActivity extends Activity { 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_sample); 


} 

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

public void calculateClickHandler(View view) { 


    if (view.getId() == R.id.calculateButton) { 

    EditText weightText = (EditText) findViewById(R.id.weightText); 
    EditText heightText = (EditText)findViewById(R.id.heightText); 
    TextView resultText = (TextView)findViewById(R.id.resultLabel); 


    int weight = (int) Float.parseFloat(weightText.getText().toString()); 
    int height = (int) Float.parseFloat(heightText.getText().toString()); 

    int bmiValue = calculateBMI(weight, height); 

    String bmiInterpretation = interpretBMI(bmiValue); 

    resultText.setText(bmiValue + "and you are" + bmiInterpretation); } 
    } 

    private int calculateBMI (int weight, int height) { 

    return (int) weight * 703/(height * height) ; 

    } 
    private String interpretBMI(int bmiValue) { 

    if (bmiValue < 18.5) { 
     return "Underweight"; 
    } else if (bmiValue < 25){ 
     return "Normal"; 
    } else if (bmiValue < 30) { 
     return "Overweight"; 
    } else { 
     return "Obese"; 
    } 
    } 
    } 

Answer 1

我找不到究竟是如何做到这一点，但这里是同样的想法。

http://developer.android.com/training/animation/zoom.html

使用该网页上的想法，你可以简单地使图像弹出时有人打计算或什么不是。祝你好运！