12_Sensor简单实例

　　列出Android手机所支持的Sensor。

package com.example.sensorlist;

import java.util.List;

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends Activity {

    private TextView tvSensors;
    private SensorManager sensorManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tvSensors = (TextView) findViewById(R.id.tvSensors);
        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

        List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
        for(Sensor sensor: sensors){
            tvSensors.append(sensor.getName() + "\n");
        }

    }

}

MainActivity

　　使用MotionSensor的简单实例。

 1 package com.example.motionsensor;
 2
 3 import android.app.Activity;
 4 import android.hardware.Sensor;
 5 import android.hardware.SensorEvent;
 6 import android.hardware.SensorEventListener;
 7 import android.hardware.SensorManager;
 8 import android.os.Bundle;
 9 import android.widget.TextView;
10
11 //为了获取传感器回传的数据，需要implements SensorEventListener
12 public class MainActivity extends Activity implements SensorEventListener {
13
14     private TextView tvAccelermeter;
15     private SensorManager sensorManager;
16
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21
22         tvAccelermeter = (TextView) findViewById(R.id.tvAccelermeter);
23
24         sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
25
26     }
27
28     @Override
29     public void onSensorChanged(SensorEvent event) {
30         // 多个传感器，要进行判断
31         switch (event.sensor.getType()) {
32         case Sensor.TYPE_ACCELEROMETER:
33             tvAccelermeter.setText(String.format("%f %f %f", event.values[0],
34                     event.values[1], event.values[2]));
35             break;
36
37         case Sensor.TYPE_GRAVITY:
38             // tvAccelermeter.setText(String.format("%f %f %f", event.values[0],
39             // event.values[1], event.values[2]));
40             break;
41
42         default:
43             break;
44         }
45
46     }
47
48     @Override
49     public void onAccuracyChanged(Sensor sensor, int accuracy) {
50
51     }
52
53     @Override
54     protected void onResume() {
55         super.onResume();
56
57         // 注册传感器
58         sensorManager.registerListener(this,
59                 sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
60                 SensorManager.SENSOR_DELAY_UI);
61         sensorManager.registerListener(this,
62                 sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY),
63                 SensorManager.SENSOR_DELAY_FASTEST);
64     }
65
66     @Override
67     protected void onPause() {
68         super.onPause();
69
70         sensorManager.unregisterListener(this);
71     }
72
73 }

MainActivity