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POAndroid, missing touch events on ImageView
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  1. POAndroid, missing touch events on ImageView
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    copied!<p>I have understood this is a problem of my code. But I can't find out which is the problem. I downloaded a "sample project" to use the touchListener, it works, but if I try to do the same on my project, suddently I can get only "press down button" events.</p> <p>Activity:</p> <pre><code> @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.navigator_layout); b = this.getIntent().getStringArrayExtra("building"); cv = (MapView) this.findViewById(R.id.map); MapMovement mm = new MapMovement(cv); compass = new Compass(this, cv, debug); } </code></pre> <p>map.xml:</p> <pre><code> &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/black" android:theme="@android:style/Theme.NoTitleBar.Fullscreen" &gt; &lt;it.inav.graphics.MapView android:id="@+id/map" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_centerInParent="true" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>I omitted some parts of MapView, where I get the images and so on, ask if you think is important:</p> <pre><code> public class MapView extends ImageView { ... public MapView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public MapView(Context context, AttributeSet attrs) { super(context, attrs); } public MapView(Context context) { super(context); } public void init(List&lt;Floor&gt; floors) { this.floors = floors; setFocusable(true); } private void setInitialZoom() { if (screen_center == null) return; // recupero la dimensione dell'immagine int image_width = bmp.getWidth(); int image_heigth = bmp.getHeight(); int longest_i = image_width; if (longest_i &lt; image_heigth) longest_i = image_heigth; float longest_s = screen_center.x * 2; if (longest_s &lt; screen_center.y * 2) longest_s = screen_center.y * 2; float zoom = (float)longest_s / longest_i; this.min_zoom = zoom; this.zoom = zoom; setImageCenter(null); } private void setZoom(float zoom) { if (zoom &lt; min_zoom) this.zoom = min_zoom; else if (zoom &gt; 1) this.zoom = 1; else this.zoom = zoom; this.invalidate(); } private void setImageCenter(PointF posizione) { if (posizione != null) image_center = new PointF(posizione.x, posizione.y); else image_center = new PointF(bmp.getWidth(), bmp.getHeight()); } private void prepareImage(Canvas canvas) { canvas.rotate((float)(bearing - selected_floor.bearing), screen_center.x, screen_center.y); // scalo l'immagine image = new Matrix(); image.setScale(zoom, zoom); Paint drawPaint = new Paint(); drawPaint.setAntiAlias(true); drawPaint.setFilterBitmap(true); float centerScaledWidth = image_center.x * zoom / 2; float centerScaledHeigth = image_center.y * zoom / 2; image.postTranslate(screen_center.x - centerScaledWidth, screen_center.y - centerScaledHeigth); canvas.drawBitmap(bmp, image, drawPaint); canvas.save(); canvas.restore(); } private void drawMarkers(Canvas canvas) { Paint drawPaint = new Paint(); drawPaint.setAntiAlias(true); drawPaint.setColor(Color.WHITE); canvas.drawCircle(screen_center.x, screen_center.y, MARKER_DIAMETER + 1, drawPaint); drawPaint.setColor(Color.RED); canvas.drawCircle(screen_center.x, screen_center.y, MARKER_DIAMETER, drawPaint); canvas.save(); canvas.restore(); } private void setScreenCenter() { if (screen_center != null) return; // recupero la dimensione dello schermo int screen_height = getMeasuredHeight(); int screen_width = getMeasuredWidth(); if ((screen_height == 0) || (screen_width == 0)) return; screen_center = new PointF(screen_width / 2, screen_height / 2); setInitialZoom(); } @Override public void draw(Canvas canvas) { setScreenCenter(); if (selected_floor != null) { prepareImage(canvas); drawMarkers(canvas); } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int measuredWidth = measure(widthMeasureSpec); int measuredHeight = measure(heightMeasureSpec); setMeasuredDimension(measuredWidth, measuredHeight); } 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; } public void setBearing(float _bearing) { bearing = _bearing; } } </code></pre> <p>And the touch listener, I've put it in another class. MapMovement:</p> <pre><code> public class MapMovement implements OnTouchListener { ... // We can be in one of these 3 states private static final int NONE = 0; private static final int DRAG = 1; private static final int ZOOM = 2; private int mode = NONE; public MapMovement(MapView mapView) { this.mapView = mapView; mapView.setOnTouchListener(this); } public void setImageCenter(PointF p) { this.image_center = p; } private void dumpEvent(MotionEvent event) { String names[] = { "DOWN" , "UP" , "MOVE" , "CANCEL" , "OUTSIDE" , "POINTER_DOWN" , "POINTER_UP" , "7?" , "8?" , "9?" }; StringBuilder sb = new StringBuilder(); int action = event.getAction(); int actionCode = action &amp; MotionEvent.ACTION_MASK; sb.append("event ACTION_" ).append(names[actionCode]); if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP) { sb.append("(pid " ).append( action &gt;&gt; MotionEvent.ACTION_POINTER_ID_SHIFT); sb.append(")" ); } sb.append("[" ); for (int i = 0; i &lt; event.getPointerCount(); i++) { sb.append("#" ).append(i); sb.append("(pid " ).append(event.getPointerId(i)); sb.append(")=" ).append((int) event.getX(i)); sb.append("," ).append((int) event.getY(i)); if (i + 1 &lt; event.getPointerCount()) sb.append(";" ); } sb.append("]" ); Log.d("event", sb.toString()); } @Override public boolean onTouch(View v, MotionEvent event) { // Dump touch event to log dumpEvent(event); return false; } } </code></pre> <p>And this is the output log when I try to do a "DRAG" on my MapView:</p> <pre><code> 12-24 09:41:58.412: D/event(31342): event ACTION_DOWN[#0(pid 0)=85,248] 12-24 09:42:01.752: D/event(31342): event ACTION_DOWN[#0(pid 0)=106,126] 12-24 09:42:02.466: D/event(31342): event ACTION_DOWN[#0(pid 0)=96,286] </code></pre> <p>The log code is the same of the test project I downloaded, and this is all the output I can get. No ACTION_UP, no ACTION_MOVEMENT, nothing.</p> <p>I don't know which is the problem or where it is. All that I want is to move the image in the activity using the touch events, but it seems that I can get only one touch event, ACTION_DOWN.</p> <p>I've posted all the parts of code where I think it could be the error. If I would have thought that the problem was certainly in one class or layout, I will have posted it and not this bunch of code for which I've lost 15 minutes to edit for you.</p> <p>Really thank you for the help. If you don't know which is the error is not a problem. But you can't come here and tell me to be "more specific", because if I could be "more specific" I will not be here to ask to you because I will have solved the problem by myself.</p>
 

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