I know it's too late but it may help someone...
import org.osmdroid.views.overlay.MyLocationOverlay;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Canvas;
import android.graphics.Matrix ;
import android.hardware.Sensor;
import android.os.BatteryManager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.RelativeLayout;
/**
* Rotate the Map in accordance to the movement of user and always point to North
*
*/
public class RotatingRelativeLayout extends RelativeLayout
{
private Matrix mMatrix = new Matrix();
private float[] mTemp = new float[2];
private Context context;
private static final float SQ2 = 1.414213562373095f;
public RotatingRelativeLayout(final Context pContext,
final AttributeSet pAttrs)
{
super(pContext, pAttrs);
this.context=pContext;
}
@Override
protected void dispatchDraw(Canvas canvas) {
long rotateTime = MyLocationOverlay.getTimeOfMovement();
float overlayBearing = MyLocationOverlay.getBearing();//this method returns current bearing from OSM
long currentTime = System.currentTimeMillis();
long diffTime = currentTime-rotateTime;
/*
* Here we rotate map in accordance with Compass to point always North
*
*/
if(diffTime >= (40*1000 )){
//isBearing=false;
overlayBearing=0;
canvas.rotate(overlayBearing, getWidth() * 0.5f, getHeight() * 0.5f);
}
else
/*
* Rotate Map According to the user movement
*/
canvas.rotate(-overlayBearing, getWidth() * 0.5f, getHeight() * 0.5f);
canvas.getMatrix().invert(mMatrix);
final float w = this.getWidth();
final float h = this.getHeight();
final float scaleFactor = (float)(Math.sqrt(h * h + w * w) / Math.min(w, h));
canvas.scale(scaleFactor, scaleFactor, getWidth() * 0.5f, getHeight() * 0.5f);
super.dispatchDraw(canvas);
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.restore();
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int width = getWidth();
final int height = getHeight();
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View view = getChildAt(i);
final int childWidth = view.getMeasuredWidth();
final int childHeight = view.getMeasuredHeight();
final int childLeft = (width - childWidth) / 2;
final int childTop = (height - childHeight) / 2;
view.layout(childLeft, childTop, childLeft + childWidth, childTop + childHeight);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int w = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
int h = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec);
int sizeSpec;
if (w > h) {
sizeSpec = MeasureSpec.makeMeasureSpec((int) (w*SQ2), MeasureSpec.EXACTLY);
}
else {
sizeSpec = MeasureSpec.makeMeasureSpec((int) (h*SQ2), MeasureSpec.EXACTLY);
}
final int count = getChildCount();
for (int i = 0; i < count; i++) {
getChildAt(i).measure(sizeSpec, sizeSpec);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
final float[] temp = mTemp;
temp[0] = event.getX();
temp[1] = event.getY();
mMatrix.mapPoints(temp);
event.setLocation(temp[0], temp[1]);
return super.dispatchTouchEvent(event);
}
}
now just use this Relative Layout in your xml like this:-
<YourPackageName.RotatingRelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/rotating_layout" android:layout_marginBottom="40dip"/>
And add Map View Programatially like this:-
// Find target container
final RelativeLayout rl=(RelativeLayout)mParent.findViewById(R.id.rotating_layout);
// Create rotator
mRotator=new RotatingRelativeLayout(mParent, null);
// Add map to the rotating layout
// Add rotator to the screen
rl.addView(mMap,new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
here mParent is Context. And one more thing if you encounter Image Pixelation prob you just have to use it
//Paint distortion handling..
p.setFilterBitmap(true);
Hope i explained it as good as i could.... feel free to ask if you find problem understanding it.
Thanks.
