Android UI设计 DroidDraw 教程一：Currency Converter

核心提示：到这里你就可以在Android中运行你的GUI，它应该像这样：步骤十六最后一步是实际的代码货币转换，Android UI设计 DroidDraw 教程一：Currency Converter(3)，它不多，你可以用一下代码来查找到你的GUI元素：this.findViewById(R.id.);下面是完整Current

到这里你就可以在Android中运行你的GUI。它应该像这样：

步骤十六

最后一步是实际的代码货币转换。它不多，你可以用一下代码来查找到你的GUI元素：

this.findViewById(R.id.);

下面是完整CurrentConverter Activity的代码：

package zyf.CurrentConverter;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.TextView;

public class CurrentConverter extends Activity

implements OnClickListener {

TextView dollars;

TextView euros;

RadioButton dtoe;

RadioButton etod;

Button convert;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(R.layout.main);

dollars = (TextView) this.findViewById(R.id.dollars);

euros = (TextView) this.findViewById(R.id.euros);

dtoe = (RadioButton) this.findViewById(R.id.dtoe);

dtoe.setChecked(true);

etod = (RadioButton) this.findViewById(R.id.etod);

convert = (Button) this.findViewById(R.id.convert);

convert.setOnClickListener(this);

}

public void onClick(View v) {

if (dtoe.isChecked()) {

convertDollarsToEuros();

}

if (etod.isChecked()) {

convertEurosToDollars();

}

}

protected void convertDollarsToEuros() {

double val =

Double.parseDouble(dollars.getText().toString());

// in a real app, we'd get this off the 'net

euros.setText(Double.toString(val * 0.67));

}

protected void convertEurosToDollars() {

double val = Double.parseDouble(euros.getText().toString());

// in a real app, we'd get this off the 'net

dollars.setText(Double.toString(val / 0.67));

}