9.23

package com.example.test3;

 

import android.app.AliasActivity;

import android.app.ProgressDialog;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

  

  

  

public class MainActivity extends AliasActivity{

  

    double num1 = 0 , num2 = 0 , result = 0;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

  

    }

  

    public void click(View v){

  

        EditText et1 = (EditText) findViewById(R.id.et1);

        EditText et2 = (EditText) findViewById(R.id.et2);

  

  

        num1 = Double.parseDouble(et1.getText().toString());

        num2 = Double.parseDouble(et2.getText().toString());

  

        switch (v.getId())

        {

            case R.id.btn1:

                result = num1 + num2;

                break;

            case R.id.btn2:

                result = num1 - num2;

                break;

            case R.id.btn3:

                result = num1 * num2;

                break;

            case R.id.btn4:

                result = num1 / num2;

                break;

        }

  

    }

  

  

    public void click1(View v){

  

        TextView tv1 = (TextView) findViewById(R.id.tv);

  

            /* @setProgress 设置初始进度

             * @setProgressStyle 设置样式（水平进度条）

             * @setMax 设置进度最大值

             */

            final int Max = 100;

            final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);

            progressDialog.setProgress(0);

            progressDialog.setTitle("正在计算,请稍等...");

            progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

            progressDialog.setMax(Max);

            progressDialog.show();

            /**

             * 开个线程

             */

            new Thread(new Runnable() {

                @Override

                public void run() {

                    int p = 0;

                    while (p <= Max){

                        try {

                            Thread.sleep(10);

                            p++;

                            progressDialog.setProgress(p);

                        }catch (Exception e){

                            e.printStackTrace();

                        }

                    }

                    progressDialog.cancel();//达到最大就消失

                }

  

            }).start();

  

        tv1.setText("计算结果:" + result + "");

  

    }

  

    public void click2(View v){

        EditText et1 = (EditText) findViewById(R.id.et1);

        EditText et2 = (EditText) findViewById(R.id.et2);

        TextView tv = (TextView) findViewById(R.id.tv);

        et1.setText("");

        et2.setText("");

        tv.setText("");

    }

  

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#786678" >
 
    <EditText
        android:id="@+id/et1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
 
    <EditText
        android:id="@+id/et2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/et1" />
 
    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/et2"
        android:onClick="click"
        android:text="+" />
 
    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/et2"
        android:layout_toRightOf="@id/btn1"
        android:onClick="click"
        android:text="-" />
 
    <Button
        android:id="@+id/btn3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/et2"
        android:layout_toRightOf="@id/btn2"
        android:onClick="click"
        android:text="*" />
 
    <Button
        android:id="@+id/btn4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/et2"
        android:layout_toRightOf="@id/btn3"
        android:onClick="click"
        android:text="/" />
 
    <Button
        android:id="@+id/btn5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn1"
        android:layout_marginLeft="20dp"
        android:background="#895865"
        android:onClick="click1"
        android:text="计算"
        android:textColor="#024488" />
 
    <Button
        android:id="@+id/btn6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn4"
        android:layout_marginLeft="135dp"
        android:layout_toRightOf="@id/btn5"
        android:background="#895865"
        android:onClick="click2"
        android:text="清空"
        android:textColor="#024488" />
 
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn5"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="20dp"
        android:text="计算结果:" />
 
</RelativeLayout>