package com.example.bmi;
import java.text.DecimalFormat;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(calcBMI);
}
private OnClickListener calcBMI = new OnClickListener(){
public void onClick(View arg0) {
DecimalFormat nf = new DecimalFormat("0.00");
EditText fieldheight = (EditText) findViewById(R.id.editText1);
EditText fieldweight = (EditText) findViewById(R.id.editText2);
double height = Double.parseDouble(fieldheight.getText().toString())/100;
double weight = Double.parseDouble(fieldweight.getText().toString());
double BMI = weight/(height*height);
TextView result = (TextView)findViewById(R.id.result);
result.setText("yourBMI is"+nf.format(BMI));
TextView fieldsuggest = (TextView)findViewById(R.id.suggest);
if(BMI>25)
{
fieldsuggest.setText(R.string.heavy);
}
else if(BMI<20)
{
fieldsuggest.setText(R.string.light);
}
else
{
fieldsuggest.setText(R.string.average);
}
}
}
};//老是提示我Syntax error on token "}", delete this token 不知道怎么改
}
刚接触android,不知道怎么去学,不知道大家有没有好的学习方法和建议。