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我正在開發一個BMI計算器，其中哪個質量狀態顯示不同的圖像。更改圖片
但我不知道該怎麼做，我在R.id.drawable上出錯 圖片ID是「imageBody」。
package com.example.calculadorimc;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class MainActivity extends Activity {
private RadioGroup rgsexo;
EditText editPeso;
EditText editAltura;
TextView imcView;
SeekBar alterarAltura;
SeekBar alterarPeso;
ImageView imagem;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editPeso = (EditText)findViewById(R.id.editPeso);
editAltura = (EditText)findViewById(R.id.editAltura);
imcView = (TextView)findViewById(R.id.imcView);
alterarAltura = (SeekBar)findViewById(R.id.alterarAltura);
alterarPeso = (SeekBar)findViewById(R.id.alterarPeso);
imagem = (ImageView)findViewById(R.id.imageBody);
alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);
alterarPeso.setOnSeekBarChangeListener(alterarpesoListener);
}
private OnSeekBarChangeListener alteraralturaListener = new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
double setAltura = (alterarAltura.getProgress()) * .01d;
// mostra na caixa o valor novo
editAltura.setText(String.format("%.02f", setAltura).replace(',', '.'));
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
};
private OnSeekBarChangeListener alterarpesoListener = new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
// Calcula o novo valor do TIP
int setPeso = (alterarPeso.getProgress());
// mostra na caixa o valor novo
editPeso.setText(String.valueOf(setPeso));
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
};
public void calculateClickHandler(View view) {
// make sure we handle the click of the calculator button
if (view.getId() == R.id.botaoCalcular) {
// get the users values from the widget references
float peso = Float.parseFloat(editPeso.getText().toString());
float altura = Float.parseFloat(editAltura.getText().toString());
// calculate the bmi value
float imcValue = calcularIMC(peso, altura);
// interpret the meaning of the bmi value
String imcInterpretation = interpretIMC(imcValue);
// now set the value in the result text
imcView.setText(String.format("%.02f", imcValue).replace(',', '.') + "-" + imcInterpretation);
}
}
// the formula to calculate the BMI index
// check for http://en.wikipedia.org/wiki/Body_mass_index
private float calcularIMC (float peso, float altura) {
return (float) (peso/(altura * altura));
}
// interpret what BMI means
private String interpretIMC(float imcValue) {
imagem = (ImageView)findViewById(R.id.imageBody);
int res;
rgsexo = (RadioGroup)findViewById(R.id.rgSexo);
int selectedId = rgsexo.getCheckedRadioButtonId(); // get the id
switch (selectedId) // switch on the button selected
{
case R.id.radioMasc:
if (imcValue < 20) {
res = r.drawable.slim;
return "Abaixo do Peso";
} else if (imcValue < 24.9) {
res = r.drawable.normal;
return "Peso Normal";
} else if (imcValue < 29.9) {
res = r.drawable.fat;
return "Acima do Peso";
} else if (imcValue < 39.9) {
res = r.drawable.fat;
return "Obesidade Moderada";
} else {
res = r.drawable.fat;
return "Obesidade Mórbida";
}
case R.id.radioFem:
if (imcValue < 19) {
return "Abaixo do Peso";
} else if (imcValue < 23.9) {
return "Peso Normal";
} else if (imcValue < 28.9) {
return "Acima do Peso";
} else if (imcValue < 38.9) {
return "Obesidade Moderada";
} else {
return "Obesidade Mórbida";
}
}
return null;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
感謝您的支持！ :)
「r.drawable.slim;」 R應該大寫正確嗎？要改變圖像，你做imagem.setImageResource（R.drawable.something） – Gak2