物联网比赛NFC通讯app.zip

package com.chen.lot_wlw; import android.os.Handler; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import java.math.BigDecimal; import java.text.DecimalFormat; import java.text.SimpleDateFormat; public class MainActivity extends AppCompatActivity { private TextView tv1; private TextView tv2; private TextView tv3; private TextView tv4; private TextView tv5; private int[] num1 = new int[20]; private float[] num2 = new float[20]; private int[] num3 = new int[20]; private int[] num4 = new int[20]; private float[] num5 = new float[20]; private TextView shijian; private TextView wendu; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv1 = (TextView) findViewById(R.id.tv1); tv2 = (TextView) findViewById(R.id.tv2); tv3 = (TextView) findViewById(R.id.tv3); tv4 = (TextView) findViewById(R.id.tv4); shijian = (TextView) findViewById(R.id.shijian); wendu = (TextView) findViewById(R.id.wendu); final SimpleDateFormat sDateFormat2 = new SimpleDateFormat("HH:mm"); for(int i=0;i<20;i++){ num1[i] = (int) (100 + Math.random()*10-5); num2[i] = (float) (7 + Math.random()*0.6-0.3); String a = new DecimalFormat("###,###,###.#").format(num2[i]); num2[i] = Float.parseFloat(a); num3[i] = (int) (40 + Math.random()*10-5); num4[i] = (int) (8 + Math.random()*4-2); num5[i] = (float) (15 + Math.random()*1-0.5); num5[i] = (float) (25); String b = new DecimalFormat("###,###,###.#").format(num5[i]); num5[i] = Float.parseFloat(b); } // //静止版本 // String time = sDateFormat2.format(new java.util.Date()); // shijian.setText("时间 "+time); // wendu.setText("温度 "); //延迟3s再执行显示 new Thread(new Runnable() { public void run() { try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } } }).start(); final Handler mHandler = new Handler(); Runnable r = new Runnable() { int j = 0; @Override public void run() { //do something String time = sDateFormat2.format(new java.util.Date()); shijian.setText("时间 "+time); wendu.setText("温度 "+num5[j]+"℃"); tv1.setText(""+num1[j]); tv2.setText(""+num2[j]); tv3.setText(""+num3[j]); tv4.setText(""+num4[j]); j++; if(j==20) j = 0; //每隔1s循环执行run方法 mHandler.postDelayed(this, 1000); } }; mHandler.postDelayed(r, 10000);//延时100毫秒 } }