android传感器；摇抽奖功能

package com.kane.sensortest;

import java.util.Random;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.os.Bundle;

import android.app.Activity;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

private TextView content;

private Button btn;

//抽签

private String[] allResults={"她爱我","她不爱我","她爱他"};

private Random random=new Random();

private boolean flag=false;

private long startTime = -1;

//初始水平方向的x加速度

private float max = 0;

private float min = 0;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

btn=(Button) findViewById(R.id.btn);

//调用传感器服务

SensorManager manager=(SensorManager) getSystemService(SENSOR_SERVICE);

//建立传感器对象

Sensor s=manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);//加速器对象，还有其它非常多对象

// 设置监听,当传感器中的值有变化时,自己主动进行监听反馈

manager.registerListener(new SensorEventListener() {

@Override

public void onSensorChanged(SensorEvent event) {

if (flag) {

if (startTime==-1) {

startTime=System.currentTimeMillis();

}

//当有变化时，自己主动运行此方法

//通过event能够取得三个方向的加速度值

float[] values=event.values;

/*StringBuilder builder=new StringBuilder();

builder.append(values[0]+"\r\n");

builder.append(values[1]+"\r\n");

builder.append(values[2]+"\r\n");

content.setText(builder);*/

if(values[0]>max){

max=values[0];

}

if (values[0]<min) {

min=values[0];

}

if (max > 10 && min < -10) {

flag = false;

long x=System.currentTimeMillis();

if(x-startTime>2000){

Toast.makeText(MainActivity.this, "超时,请又一次摇",

Toast.LENGTH_SHORT).show();

}

else {

//能够出结果了

//随机生成

int index=random.nextInt(3);

content.setText("结果："+allResults[index]);

}

startTime = -1;

}

}

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

}, s, 0);

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

flag=true;

content.setText("请開始摇");

}

});

}

}