安卓:Shakelistener错误 [英] Android: Shakelistener error
本文介绍了安卓:Shakelistener错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个摇听众如下:
public class ShakeListener implements SensorEventListener {
private String TAG = ShakeListener.class.getSimpleName();
private static final int FORCE_THRESHOLD = 800;
private static final int TIME_THRESHOLD = 100;
private static final int SHAKE_TIMEOUT = 500;
private static final int SHAKE_DURATION = 1000;
private static final int SHAKE_COUNT = 5;
private SensorManager mSensorMgr;
private float mLastX = -1.0f, mLastY = -1.0f, mLastZ = -1.0f;
private long mLastTime;
private OnShakeListener mShakeListener;
private Context mContext;
private int mShakeCount = 0;
private long mLastShake;
private long mLastForce;
public interface OnShakeListener {
public void onShake();
}
public ShakeListener(Context context) {
Log.d(TAG,"ShakeListener invoked---->");
mContext = context;
resume();
}
public void setOnShakeListener(OnShakeListener listener) {
mShakeListener = listener;
}
public void resume() {
mSensorMgr = (SensorManager) mContext
.getSystemService(Context.SENSOR_SERVICE);
if (mSensorMgr == null) {
throw new UnsupportedOperationException("Sensors not supported");
}
boolean supported = false;
try {
supported = mSensorMgr.registerListener(this,
mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_GAME);
} catch (Exception e) {
Toast.makeText(mContext, "Shaking not supported", Toast.LENGTH_LONG)
.show();
}
if ((!supported) && (mSensorMgr != null))
mSensorMgr.unregisterListener(this);
}
public void pause() {
if (mSensorMgr != null) {
mSensorMgr.unregisterListener(this);
mSensorMgr = null;
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER)
return;
long now = System.currentTimeMillis();
if ((now - mLastForce) > SHAKE_TIMEOUT) {
mShakeCount = 0;
}
if ((now - mLastTime) > TIME_THRESHOLD) {
long diff = now - mLastTime;
float speed = Math.abs(event.values[SensorManager.DATA_X]
+ event.values[SensorManager.DATA_Y]
+ event.values[SensorManager.DATA_Z] - mLastX - mLastY
- mLastZ)
/ diff * 10000;
if (speed > FORCE_THRESHOLD) {
if ((++mShakeCount >= SHAKE_COUNT)
&& (now - mLastShake > SHAKE_DURATION)) {
mLastShake = now;
mShakeCount = 0;
Log.d(TAG,"ShakeListener mShakeListener---->"+mShakeListener);
if (mShakeListener != null) {
mShakeListener.onShake();
}
}
mLastForce = now;
}
mLastTime = now;
mLastX = event.values[SensorManager.DATA_X];
mLastY = event.values[SensorManager.DATA_Y];
mLastZ = event.values[SensorManager.DATA_Z];
}}}
在我的活动之一,ffollows使用这个监听器IAM
iam using this listener in one of my activity as ffollows
mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
public void onShake()
{
Intent myIntent = new Intent(myActivity.this, loginActivity.class);
startActivity(myIntent);
}
});
这动摇只能触发亚姆时在那个特定的activity..but IT方面引发的一切活动,更糟糕的部分是,即使当我关闭应用程序,如果我摇,该事件被触发,使应用程序open..Any帮助AP是preciated。
this shake should trigger only when iam on that particular activity..but it s triggering in all activities ,worse part is even when i close the app if i shake, the event is triggering and making the app open..Any help is appreciated.
推荐答案
在您的活动添加这个方法:
add this method in your activity:
@Override
protected void finalize() throws Throwable {
try {
stop();
} catch (Exception e){
e.printStackTrace();
}
super.finalize();
}
public void stop(){
try {
sensorMgr.unregisterListener(this, mAccelerometer);
} catch (Exception e){
e.printStackTrace();
}
}
这篇关于安卓:Shakelistener错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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