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Take screen rotation into account

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Change-Id: I354c58eb1d28552d46b8fa269e12c00eaf6cbb99
This commit is contained in:
Mathias Agopian
2010-08-16 12:55:18 -07:00
parent 8fc778984c
commit a7c85d9235
1 changed files with 35 additions and 2 deletions
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37
samples/AccelerometerPlay/src/com/example/android/accelerometerplay/AccelerometerPlayActivity.java
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@@ -30,7 +30,10 @@ import android.os.Bundle;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.Surface;
import android.view.View;
import android.view.WindowManager;
/**
* This is an example of using the accelerometer to integrate the device's
@@ -49,6 +52,8 @@ public class AccelerometerPlayActivity extends Activity {
private SimulationView mSimulationView;
private SensorManager mSensorManager;
private PowerManager mPowerManager;
private WindowManager mWindowManager;
private Display mDisplay;
private WakeLock mWakeLock;
/** Called when the activity is first created. */
@@ -62,6 +67,10 @@ public class AccelerometerPlayActivity extends Activity {
// Get an instance of the PowerManager
mPowerManager = (PowerManager) getSystemService(POWER_SERVICE);
// Get an instance of the WindowManager
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
mDisplay = mWindowManager.getDefaultDisplay();
// Create a bright wake lock
mWakeLock = mPowerManager.newWakeLock(
PowerManager.SCREEN_BRIGHT_WAKE_LOCK, getClass().getName());
@@ -392,9 +401,33 @@ public class AccelerometerPlayActivity extends Activity {
* record the accelerometer data, the event's timestamp as well as
* the current time. The latter is needed so we can calculate the
* "present" time during rendering.
*
* In this application, we need to take into account how the
* screen is rotated with respect to the sensors (which always
* return data in a coordinate space aligned to with the screen
* in its native orientation).
*
*/
mSensorX = event.values[0];
mSensorY = event.values[1];
switch (mDisplay.getRotation()) {
case Surface.ROTATION_0:
mSensorX = event.values[0];
mSensorY = event.values[1];
break;
case Surface.ROTATION_90:
mSensorX = -event.values[1];
mSensorY = event.values[0];
break;
case Surface.ROTATION_180:
mSensorX = -event.values[0];
mSensorY = -event.values[1];
break;
case Surface.ROTATION_270:
mSensorX = event.values[1];
mSensorY = -event.values[0];
break;
}
mSensorTimeStamp = event.timestamp;
mCpuTimeStamp = System.nanoTime();
}