我正在寻找与此相关的方向。我有一个纸牌融合游戏（Five Kings）已经使用了大约6个月了；我的最新版本0.9.22自3月以来一直保持稳定。但是，最近我收到用户无法将丢弃物拖到丢弃物堆的报告，并且常见的线程似乎是带有Android 6.0的Samsung S7。当您从手中拖动卡片时，可以拖动的位置会变成透明，并且当您在其上拖动时，它们会恢复为正常（alpha = 1）。您可以拖动的其他地方似乎还可以，但是丢弃堆不会变暗或变亮，这使我认为Drag Event侦听器无法正常工作。
这是DiscardPileDragEventListener：
class DiscardPileDragEventListener implements View.OnDragListener {
// This is the method that the system calls when it dispatches a drag event to the
// listener.
@Override
public boolean onDrag(final View v, final DragEvent event) {
//that we are not ready to accept the drag if not at the right point of the play
CardView cv = (CardView)v;
// Defines a variable to store the action type for the incoming event
final int action = event.getAction();
// Handles each of the expected events
switch(action) {
case DragEvent.ACTION_DRAG_STARTED:
// Determines if this View can accept the dragged data
if (cv.isAcceptDrag() && event.getClipDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN)) {
//fades out of the draw pile
cv.startAnimation(Utilities.instantFade(FiveKings.HALF_TRANSPARENT_ALPHA, FiveKings.HALF_TRANSPARENT_ALPHA));
// returns true to indicate that the View can accept the dragged data.
return true;
} else {
//remind user what they should be doing if in the first few rounds
((FiveKings) cv.getContext()).setShowHint(null, FiveKings.HandleHint.SHOW_HINT, FiveKings.GameDifficulty.EASY);
// Returns false. During the current drag and drop operation, this View will
// not receive events again until ACTION_DRAG_ENDED is sent.
return false;
}
case DragEvent.ACTION_DRAG_ENTERED:
cv.clearAnimation();
return true;
case DragEvent.ACTION_DRAG_LOCATION:
// Ignore the event
return true;
case DragEvent.ACTION_DRAG_EXITED:
cv.startAnimation(Utilities.instantFade(FiveKings.HALF_TRANSPARENT_ALPHA, FiveKings.HALF_TRANSPARENT_ALPHA));
return true;
case DragEvent.ACTION_DROP:
cv.clearAnimation();
// Gets the item containing the dragged data
ClipData.Item item = event.getClipData().getItemAt(0); //this is the View index to recover which card
// Gets the text data from the item.
String dragData = item.getText().toString();
//Handle exception here and return false (drop wasn't handled) if it wasn't found
int iView = -1;
try {
iView = Integer.parseInt(dragData);
}catch (NumberFormatException e) {
return false;
}
return ((FiveKings)cv.getContext()).discardedCard(iView);
case DragEvent.ACTION_DRAG_ENDED:
if (cv.isAcceptDrag()) cv.clearAnimation();
return true;
// An unknown action type was received.
default:
Log.e("DiscardPileDragEventListener", "Unknown action type received by OnDragListener.");
}
return false;
}
}
这是设置实际拖动卡的代码段；在此CardView中是ImageView的子类：
for (Card card : meld) {
//highlight wildcards unless no dragging (Computer turn, or Human final turn)
CardView cv = new CardView(this, card, iView, allowDragging ? highlightWildCardRank : null);
cv.setTag(iView); //allows us to pass the index into the dragData without dealing with messy object passing
...
cv.bringToFront();
cv.setClickable(false); //TODO:B: Allow selection by clicking for multi-drag?
if (allowDragging) {//no dragging of computer cards or Human cards after final turn
cv.setOnDragListener(new CardViewDragEventListener()); //needed per-card to reset the dragged card to normal visibility (alpha)
cv.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() != MotionEvent.ACTION_DOWN) return false;
// Create a new ClipData using the tag as a label, the plain text MIME type, and
// the string containing the View index. This will create a new ClipDescription object within the
// ClipData, and set its MIME type entry to "text/plain"
ClipData dragData = ClipData.newPlainText("Discard", v.getTag().toString());
View.DragShadowBuilder cardDragShadow = new CardViewDragShadowBuilder(v);
v.startAnimation(Utilities.instantFade(FiveKings.HALF_TRANSPARENT_ALPHA, FiveKings.HALF_TRANSPARENT_ALPHA));
// Starts the drag
v.startDrag(dragData, cardDragShadow, null, 0);
return true;
}//end onClick
});
}//end if allowDragging
...
在onCreate中，我设置了Discard Pile onDragListener：
...
mDiscardPile.setOnDragListener(new DiscardPileDragEventListener());
...
一件麻烦事是，我在“丢弃桩”的父视图中也有一个onDragListener，以在您将卡拖动到“丢弃桩”时提供一条消息。在我的测试中，此方法效果很好，但我只是想知道它是否与某种原因有关。
希望对朝哪个方向提出任何建议。
最佳答案
事实证明，三星为S7引入了一项称为Game Tuner的功能，并将其反向移植到S6和其他设备。它会自动更改市场上任何已标记为“游戏”的已安装应用的分辨率。这对于图形驱动游戏非常有效，但是通过拖放完全像我的纸牌游戏一样搞砸了。请注意，即使您从未进入Game Tuner应用程序，也会发生这种情况。
因此，如果您在游戏或应用程序中遇到这种情况，请询问用户是否安装了Game Tuner，并要求他们将“分辨率”设置为100％（他们可以逐个游戏地完成此操作）。
2017年3月更新：
我现在有99％的解决方案。即使没有安装游戏调谐器，三星也可以扩展游戏（显然达到了75％）。因此，您必须安装Game Tuner，然后将“分辨率”重置为100％，以使拖放正常工作。
我没有的1％是为什么他们会做这样的愚蠢的事情。