Android的加速度传感器 [英] Android Accelerometer Sensor
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问题描述
我想用加速度传感器的工作。所以,我想这 例: http://blog.androgames.net/85/android-accelerometer-tutorial/一>
I am trying to work with Accelerometer Sensor. So i tried this example: http://blog.androgames.net/85/android-accelerometer-tutorial/
这很好地工作。 但是,当我改变AccelerometerManager活动服务,它不工作,我得到了一个错误。
It work perfectly. But when i change AccelerometerManager activity to a service, it doesn't work and i got an error.
//this is the activity that i want change
public class Accelerometer extends Activity
implements AccelerometerListener {
private static Context CONTEXT;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CONTEXT = this;
}
protected void onResume() {
super.onResume();
if (AccelerometerManager.isSupported()) {
AccelerometerManager.startListening(this);
}
}
protected void onDestroy() {
super.onDestroy();
if (AccelerometerManager.isListening()) {
AccelerometerManager.stopListening();
}
}
public static Context getContext() {
return CONTEXT;
}
/**
* onShake callback
*/
public void onShake(float force) {
Toast.makeText(this, "Phone shaked : " + force, 1000).show();
}
/**
* onAccelerationChanged callback
*/
public void onAccelerationChanged(float x, float y, float z) {
((TextView) findViewById(R.id.x)).setText(String.valueOf(x));
((TextView) findViewById(R.id.y)).setText(String.valueOf(y));
((TextView) findViewById(R.id.z)).setText(String.valueOf(z));
}
}
//这是我的服务,当我改变它,我的错误是HIR公用
//this is my service when i change it, my error is hir public
class Accelerometer extends Service implements AccelerometerListener{ private static Context CONTEXT;
@Override
public IBinder onBind(Intent intent) {
// TODO Put your code here
return null;
}
@Override
public void onCreate() {
System.out.println("start listening");
// if (AccelerometerManager.isSupported()) { AccelerometerManager.startListening(this);
// }
}
@Override
public void onDestroy() {
System.out.println("start listening");
// if (AccelerometerManager.isListening()) { AccelerometerManager.stopListening();
// }
}
public static Context getContext() {
return CONTEXT;
}
/**
* onShake callback
*/
public void onShake(float force) {
Toast.makeText(this, "Phone shaked niktilha omha ya 3ammi el7ag: " + force, 1000).show(); }
/**
* onAccelerationChanged callback
*/
public void onAccelerationChanged(float x, float y, float z) { System.out.println("x = "+x+" y = "+y+" z = "+z); }
}
感谢您的帮助。
Thanks for help.
推荐答案
有关背景尝试初始化为
this.getApplicationContext()
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