Android的加速度传感器模拟摇一摇的效果-android学习之旅(66)

主要介绍一下android的加速传感器的简单用法,模拟摇一摇 ,如果x,y,z三个方向的加速度超过了15,就会弹出Toast,当然你可以设置更复杂的策略,比如判断间隔

代码如下

public class MainActivity extends Activity {
private SensorManager sensorManager;
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(sensorEventListener,sensor,SensorManager.SENSOR_DELAY_NORMAL);
}
private SensorEventListener sensorEventListener = new SensorEventListener() {
@Override
public void onSensorChanged(SensorEvent sensorEvent) {
float xValue = Math.abs(sensorEvent.values[0]);
float yValue = Math.abs(sensorEvent.values[1]);
float zvalue = Math.abs(sensorEvent.values[2]);
if (xValue > 15||yValue > 15||zvalue > 15){
Toast.makeText(MainActivity.this,"摇一摇",Toast.LENGTH_LONG).show();
}
}

@Override
public void onAccuracyChanged(Sensor sensor, int i) {

}
};
@Override
protected void onDestroy() {
if (sensorManager != null){
sensorManager.unregisterListener(sensorEventListener);
}
super.onDestroy();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}
}