В Activity есть текст и изображения. Если нажать на любое изображение, откроется DialogFragment (с одним элементом из ListView), в котором находится большое изображение, которое можно перемещать и масштабировать (пинч). По оси Х проблем нет, но при перемещении по оси У - движение "обрывается", т.е. продвигается только на короткое расстояние и срабатывает ACTION_CANCEL. Почему так? Буду рад любым идеям и предположениям, ибо сам зашел в многодневный тупик...
public class MyBaseAdapter_pic extends BaseAdapter implements View.OnTouchListener {
private ArrayList<OneCoin_pic> arr_nominals;
private Context ctx;
LayoutInflater layoutInflater;
ImageView imageView;
final String LOG_TAG = "myLogs";
private Matrix matrix = new Matrix();
private Matrix savedMatrix = new Matrix();
private static final int NONE = 0;
private static final int DRAG = 1;
private static final int ZOOM = 2;
private int mode = NONE;
private PointF startPoint = new PointF();
private PointF midPoint = new PointF();
private float oldDist = 1f;
public MyBaseAdapter_pic(ArrayList<OneCoin_pic> arr_nominals, Context ctx) {
this.arr_nominals = arr_nominals;
this.ctx = ctx;
layoutInflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return arr_nominals.size();
}
@Override
public Object getItem(int position) {
return arr_nominals.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View my_view = convertView;
if (my_view == null){
my_view = layoutInflater.inflate(R.layout.list_item_zoom, parent, false);
imageView = (ImageView) my_view.findViewById(R.id.big_pic);
imageView.setOnTouchListener(this);
final View view = my_view.findViewById(R.id.hint);
Animation a = new AlphaAnimation(1.00f, 0.00f);
a.setDuration(2000);
a.setAnimationListener(new Animation.AnimationListener() {
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
public void onAnimationEnd(Animation animation) {
view.setVisibility(View.GONE);
}
});
view.startAnimation(a);
}
OneCoin_pic coin = get_one_coin_object(position);
int resID = ctx.getResources().getIdentifier(coin.getBigPic(), "drawable", ctx.getPackageName());
imageView.setImageResource(resID);
return my_view;
}
private OneCoin_pic get_one_coin_object(int position){
OneCoin_pic obj = arr_nominals.get(position);
return obj;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
ImageView view = (ImageView) v;
dumpEvent(event);
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
savedMatrix.set(matrix);
startPoint.set(event.getX(), event.getY());
Log.d(LOG_TAG, "mode=DRAG");
mode = DRAG;
break;
case MotionEvent.ACTION_POINTER_DOWN:
oldDist = spacing(event);
Log.d(LOG_TAG, "oldDist=" + oldDist);
if (oldDist > 10f) {
savedMatrix.set(matrix);
midPoint(midPoint, event);
mode = ZOOM;
Log.d(LOG_TAG, "mode=ZOOM");
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
Log.d(LOG_TAG, "mode=NONE");
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - startPoint.x, event.getY()
- startPoint.y);
} else if (mode == ZOOM) {
float newDist = spacing(event);
Log.d(LOG_TAG, "newDist=" + newDist);
if (newDist > 10f) {
matrix.set(savedMatrix);
float scale = newDist / oldDist;
matrix.postScale(scale, scale, midPoint.x, midPoint.y);
}
}
break;
}
view.setImageMatrix(matrix);
return true;
}
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 & 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 >> MotionEvent.ACTION_POINTER_ID_SHIFT);
sb.append(")");
}
sb.append("[");
for (int i = 0; i < 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 < event.getPointerCount())
sb.append(";");
}
sb.append("]");
Log.d(LOG_TAG, sb.toString());
}
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return (float)Math.sqrt(x * x + y * y);
}
private void midPoint(PointF point, MotionEvent event) {
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
}
dialog_zoom.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="@drawable/zz_bg_oval_blue_light"
android:padding="5dp">
<ListView
android:id="@+id/zoom_listview"
android:layout_width="300dp"
android:layout_height="300dp">
</ListView>
</LinearLayout>
list_item_zoom:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_gravity="center"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/big_pic"
android:layout_centerInParent="true"
android:scaleType="matrix"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/hint"
android:src="@drawable/z_a_zooming"
android:visibility="visible"
android:layout_centerInParent="true"/>
</RelativeLayout>
Log (перемещение по оси Х):
D/myLogs: mode=DRAG
D/myLogs: event ACTION_MOVE[#0(pid 0)=125,288]
D/myLogs: event ACTION_MOVE[#0(pid 0)=125,286]
D/myLogs: event ACTION_MOVE[#0(pid 0)=128,287]
D/myLogs: event ACTION_MOVE[#0(pid 0)=129,289]
D/myLogs: event ACTION_UP[#0(pid 0)=129,289]
D/myLogs: mode=NONE
Log (перемещение по оси У):
D/myLogs: mode=DRAG
D/myLogs: event ACTION_MOVE[#0(pid 0)=277,338]
D/myLogs: event ACTION_CANCEL[#0(pid 0)=280,328]
