Hi, I don't see any reference to the compass sensor in your code, just a few references to 'bearing' how is it set ?
Regards On Jun 15, 3:39 am, Raghav Sood <[email protected]> wrote: > Hi all, > > According to the book I am learning from the following code should > create a sad looking, but working, compass. All I have managed to get > is the sad lookout of it. The compass draws correctly but doesn't > rotate. I am testing it on a real device with a accelerometer. The > rest of the files in the project have nothing to do with the rotation. > Everything happens in this class. Could anyone point me to my mistake? > Any help would be appreciated. > > package com.raghavsood.compass; > > import android.content.Context; > import android.graphics.*; > import android.view.*; > import android.util.AttributeSet; > import android.content.res.Resources; > > public class CompassView extends View { > > private Paint markerPaint; > private Paint textPaint; > private Paint circlePaint; > private String northString; > private String eastString; > private String southString; > private String westString; > private int textHeight; > > private float bearing; > public void setBearing(float _bearing) { > bearing = _bearing; > } > public float getBearing() { > return bearing; > } > > public CompassView(Context context) { > super(context); > initCompassView(); > } > > public CompassView(Context context, AttributeSet attrs) { > super(context, attrs); > initCompassView(); > } > > public CompassView(Context context, > AttributeSet ats, > int defaultStyle) { > super(context, ats, defaultStyle); > initCompassView(); > } > > protected void initCompassView() { > setFocusable(true); > > Resources r = this.getResources(); > > circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG); > circlePaint.setColor(r.getColor(R.color.background_color)); > circlePaint.setStrokeWidth(1); > circlePaint.setStyle(Paint.Style.FILL_AND_STROKE); > > northString = r.getString(R.string.cardinal_north); > eastString = r.getString(R.string.cardinal_east); > southString = r.getString(R.string.cardinal_south); > westString = r.getString(R.string.cardinal_west); > > textPaint = new Paint(Paint.ANTI_ALIAS_FLAG); > textPaint.setColor(r.getColor(R.color.text_color)); > > textHeight = (int)textPaint.measureText("yY"); > > markerPaint = new Paint(Paint.ANTI_ALIAS_FLAG); > markerPaint.setColor(r.getColor(R.color.marker_color)); > } > > @Override > protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { > // The compass is a circle that fills as much space as possible. > // Set the measured dimensions by figuring out the shortest boundary, > // height or width. > int measuredWidth = measure(widthMeasureSpec); > int measuredHeight = measure(heightMeasureSpec); > > int d = Math.min(measuredWidth, measuredHeight); > > setMeasuredDimension(d, d); > } > > private int measure(int measureSpec) { > int result = 0; > > // Decode the measurement specifications. > int specMode = MeasureSpec.getMode(measureSpec); > int specSize = MeasureSpec.getSize(measureSpec); > > if (specMode == MeasureSpec.UNSPECIFIED) { > // Return a default size of 200 if no bounds are specified. > result = 200; > } else { > // As you want to fill the available space > // always return the full available bounds. > result = specSize; > } > return result; > } > > @Override > protected void onDraw(Canvas canvas) { > int px = getMeasuredWidth() / 2; > int py = getMeasuredHeight() /2 ; > > int radius = Math.min(px, py); > // Draw the background > canvas.drawCircle(px, py, radius, circlePaint); > // Rotate our perspective so that the ‘top’ is > // facing the current bearing. > canvas.save(); > canvas.rotate(-bearing, px, py); > int textWidth = (int)textPaint.measureText("W"); > int cardinalX = px-textWidth/2; > int cardinalY = py-radius+textHeight; > > // Draw the marker every 15 degrees and text every 45. > for (int i = 0; i < 24; i++) { > // Draw a marker. > canvas.drawLine(px, py-radius, px, py-radius+10, markerPaint); > > canvas.save(); > canvas.translate(0, textHeight); > > // Draw the cardinal points > if (i % 6 == 0) { > String dirString = ""; > switch (i) { > case(0) : { > dirString = northString; > int arrowY = 2*textHeight; > canvas.drawLine(px, arrowY, px-5, 3*textHeight, > markerPaint); > canvas.drawLine(px, arrowY, px+5, 3*textHeight, > markerPaint); > break; > } > case(6) : dirString = eastString; break; > case(12) : dirString = southString; break; > case(18) : dirString = westString; break; > } > canvas.drawText(dirString, cardinalX, cardinalY, textPaint); > } > > else if (i % 3 == 0) { > // Draw the text every alternate 45deg > String angle = String.valueOf(i*15); > float angleTextWidth = textPaint.measureText(angle); > > int angleTextX = (int)(px-angleTextWidth/2); > int angleTextY = py-radius+textHeight; > canvas.drawText(angle, angleTextX, angleTextY, textPaint); > } > canvas.restore(); > > canvas.rotate(15, px, py); > } > canvas.restore(); > } > > } > > Thanks > -- > Raghav > Soodhttp://www.raghavsood.com/http://www.androidappcheck.com/http://www.telstop.tel/ -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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