6
在我的android應用程序中，我有全景圖像，並根據手機運動使用TYPE_ORIENTATION傳感器旋轉此圖像，它對景觀和potrait都正常工作。這是旋轉邏輯的代碼。如何在android中檢測顛倒的方向？
@Override
public void onSensorChanged(SensorEvent event) {
switch (event.sensor.getType()) {
case Sensor.TYPE_ORIENTATION:
float[] insideval = getValPoints();
event.values[1]=(float) (event.values[1]*2.8);
event.values[2]=(float) (event.values[2]*2.8);
setValPoints(event.values.clone());
if (insideval != null) {
float check= insideval[0] - event.values[0];
if (-1<=check && check <=1) {
//Animation stoped
this.stopAnimation();
}else{
if (getdefaltDeviceOrientation() == ORENTATION_LANDSCAPE) {
// Natural Orientation is landscape
if (getcurrentDeviceOrientation() == 1) {
//ORIENTATION_PORTRAIT
startPoint = CGPoint.CGPointMake(insideval[2], insideval[1]);
if (insideval[0] < event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[2]+ event.values[2], insideval[1]);
} else if (insideval[0] > event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[2]- event.values[2], insideval[1]);
}
} else if (getcurrentDeviceOrientation() == 2) {
//Log.i(TAG, "ORIENTATION_LANDSCAPE");
startPoint = CGPoint.CGPointMake(insideval[1], insideval[2]);
if (insideval[0] < event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[1]- event.values[1], insideval[2]);
} else if (insideval[0] > event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[1]+event.values[1] ,insideval[2]);
}
}
} else if (getdefaltDeviceOrientation() == ORENTATION_PROTRAIT) {
// Natural Orientation is portrait
if (getcurrentDeviceOrientation() == 1) {
//Log.i(TAG, "ORIENTATION_PORTRAIT");
startPoint = CGPoint.CGPointMake(insideval[1], insideval[2]);
if (insideval[0] < event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[1]+ event.values[1], insideval[2]);
} else if (insideval[0] > event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[1]- event.values[1], insideval[2]);
}
} else if (getcurrentDeviceOrientation() == 2) {
//Log.i(TAG, "ORIENTATION_LANDSCAPE");
startPoint = CGPoint.CGPointMake(insideval[2], insideval[1]);
if (insideval[0] < event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[2]- event.values[2], insideval[1]);
} else if (insideval[0] > event.values[0]) {
endPoint = CGPoint.CGPointMake(insideval[2]+event.values[2],insideval[1]);
}
}
}
this.drawView();
}
}
break;
}
}
所以我的問題是，如果設備的方向改變倒掛圖像將旋轉到錯誤的方向（方向剛好相反）。我如何解決這個問題，以及當設備方向顛倒時實際發生了什麼？
謝謝。