本文实例为大家分享了Android实现简单加法计算器的具体代码，供大家参考，具体内容如下
package com.example.calculator;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private TextView tv1;
private EditText et1;
private EditText et2;
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) this.findViewById(R.id.textView1);
et1 = (EditText) this.findViewById(R.id.editText1);
et2 = (EditText) this.findViewById(R.id.editText2);
btn = (Button) this.findViewById(R.id.button1);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String inputText1 = et1.getText().toString();
String inputText2 = et2.getText().toString();
int num1 = Integer.valueOf(inputText1).intValue();
int num2 = Integer.valueOf(inputText2).intValue();
num1 = num1+num2;
inputText1 = String.valueOf(num1);
tv1.setText(inputText1);
}
});
}
@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;
}
}
小编再为大家分享安卓简单加法计算器的另一段实现代码：
界面上有两个输入框，默认值为0，一个文本输出框，一个按钮；输入数字后点击Button计算；
xml中输入框有个属性android:inputType=”number”记得注意下。
代码如下：
private EditText input1;
private EditText input2;
private TextView textView;
int num = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
input1 = (EditText)findViewById(R.id.shurukuan);
input2 = (EditText)findViewById(R.id.shurukuan2);
textView = (TextView)findViewById(R.id.textView2);
Button Btn1 = (Button)findViewById(R.id.button3);
Btn1.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
num= Integer.parseInt(input1.getText().toString()) + Integer.parseInt(input2.getText().toString());
textView.setText(Integer.toString(num));
}
});
}
