我制作了一款使用接近传感器改变歌曲的MP3播放器应用程序。我决定更新它并添加使用切换按钮禁用传感器的功能。我尝试使用此代码:
case R.id.toggleButton1:
if (toggleButton1.isChecked())
{
sm.unregisterListener(this);
Toast.makeText(getBaseContext(), "Proximity Sensor Off!",
Toast.LENGTH_SHORT).show();
}
break;
我在代码中进一步注册了监听器。当我现在运行应用程序时,监听器已被禁用。我希望默认情况下启用它,除非用户选择切换按钮。任何帮助将不胜感激......非常感谢!
答案 0 :(得分:0)
sm.unregisterListener(此); 因为你可能是从onClickListener调用它,这个意味着实际的OnClickListener而不是proximysensor监听器
答案 1 :(得分:0)
这可能对你有帮助......
public class SensorActivity extends Activity implements SensorEventListener,
CompoundButton.OnCheckedChangeListener {
private ToggleButton toggleButton;
private SensorManager sensorManager;
private Sensor proximitySensor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toggleButton = (ToggleButton) findViewById(R.id.toggleButton);
toggleButton.setOnCheckedChangeListener(this);
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
proximitySensor = sensorManager
.getDefaultSensor(Sensor.TYPE_PROXIMITY);
}
@Override
protected void onResume() {
super.onResume();
if (proximitySensor != null) {
sensorManager.registerListener(this, proximitySensor,
SensorManager.SENSOR_DELAY_NORMAL);
}
}
@Override
protected void onPause() {
super.onPause();
sensorManager.unregisterListener(this);
}
@Override
public void onSensorChanged(SensorEvent event) {
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked && proximitySensor != null) {
sensorManager.registerListener(this, proximitySensor,
SensorManager.SENSOR_DELAY_NORMAL);
} else {
sensorManager.unregisterListener(this);
}
}
}