android加速度传感器简单实现

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1、Activity类

public class MainActivity extends Activity {private TextView content;private Button btn;private boolean flag = false;private float max = 0;private float min = 0;private long startTime = -1;private Random r = new Random();// 抽签private String[] allResults = { "大吉", "小吉", "凶", "大凶" };@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);content = (TextView) findViewById(R.id.content);btn = (Button) findViewById(R.id.btn);SensorManager manager = (SensorManager) getSystemService(SENSOR_SERVICE);// 建立传感器对象Sensor s = manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);// 设置监听,当传感器中的值有变化时,自动进行监听反馈manager.registerListener(new SensorEventListener() {@Overridepublic void onSensorChanged(SensorEvent event) {if (flag) {if (startTime == -1) {startTime = System.currentTimeMillis();}// 当有变化时,自动执行此方法// 通过event可以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.toString());if (values[0] > max) {max = values[0];}if (values[0] < min) {min = values[0];}if (max > 10 && min < -10) {// 可以出结果了flag = false;// 随机生成int index = r.nextInt(4);content.setText("结果为：" + allResults[index]);startTime = -1;}if (System.currentTimeMillis() - startTime > 2000) {flag = false;startTime = -1;Toast.makeText(MainActivity.this, "超时,请重新摇",Toast.LENGTH_SHORT).show();}}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}}, s, SensorManager.SENSOR_DELAY_GAME);btn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {flag = true;content.setText("请开始摇");}});}}

2、布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <TextView        android:id="@+id/content"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="开始"        android:layout_alignParentBottom="true" /></RelativeLayout>

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