Sensor传感器（二），实现摇一摇

来源：互联网发布：linux piwik安装编辑：程序博客网时间：2024/06/11 02:53

利用Sensor.TYPE_ACCELEROMETER可以实现摇一摇功能。

import android.app.Activity;import android.content.Context;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements SensorEventListener {    private Button button;    private TextView textView;    private SensorManager manager;    private Sensor sensor;    private float lastX = 0.0f;    private final float SHOCK_THRESHOLD = 20.0f;// 晃动的幅度    private final int COUNT = 3;// 连续晃动的次数    private int shockCount = 0;    private boolean shocked = false;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button = (Button) this.findViewById(R.id.button1);        textView = (TextView) this.findViewById(R.id.textView);        manager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);        sensor = manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View arg0) {//重置                // TODO Auto-generated method stub                shocked=false;                shockCount = 0;                lastX=0.0f;            }        });    }    @Override    protected void onResume() {        // TODO Auto-generated method stub        super.onResume();        manager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_UI);    }    @Override    protected void onPause() {        // TODO Auto-generated method stub        super.onPause();        manager.unregisterListener(this);    }    @Override    public void onAccuracyChanged(Sensor arg0, int arg1) {        // TODO Auto-generated method stub    }    @Override    public void onSensorChanged(SensorEvent event) {        // TODO Auto-generated method stub        final float x = event.values[0];        if (Math.abs(lastX - x) >= SHOCK_THRESHOLD) {            shockCount++;            shocked = false;        }        lastX = x;        textView.setText("晃动了" + shockCount + "次");        if (!shocked && shockCount >= 3 && (shockCount % COUNT == 0)) {                shocked = true;                Toast.makeText(MainActivity.this, "-------喝前摇一摇->>", 1).show();//              System.out.println("-------喝前摇一摇->>");        }    }}```Xml文件：activity_main.xml

dimens.xml

<!-- Default screen margins, per the Android Design guidelines. --><dimen name="activity_horizontal_margin">16dp</dimen><dimen name="activity_vertical_margin">16dp</dimen>

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