我非常需要你的帮助。我开发了拖放应用程序。我现在想要完成的是，当我将拖动的对象拖放到放置目标时，它应该适合放置目标。这是我到目前为止所尝试的：
ImageView img, img2, img3=null;
AbsoluteLayout aLayout;
int status = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
aLayout= (AbsoluteLayout)findViewById(R.id.absLayout);
img = (ImageView)findViewById(R.id.imageView1);
img2 = (ImageView)findViewById(R.id.imageView2);
img3 = (ImageView)findViewById(R.id.imageView3);
img.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
status = 1;
Log.i("ImageStatus","1st image moved" + status);
return false;
}
});
img2.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
status = 2;
Log.i("ImageStatus","2nd image moved" + status);
return false;
}
});
aLayout.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Log.i("touch", "touched here" + event);
boolean eventConsumed = true;
int x = (int)event.getX();
int y = (int)event.getY();
if(status == 1) // any event from down and move
{
LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,
(int)event.getX()-img.getWidth()/2,
(int)event.getY()-img.getHeight()/2);
img.setLayoutParams(lp);
} else if(status == 2){
LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,
(int)event.getX()-img2.getWidth()/2,
(int)event.getY()-img2.getHeight()/2);
img2.setLayoutParams(lp);
} else {
Log.i("Nothing", "Nothing");
}
if(event.getAction()==MotionEvent.ACTION_UP){
status = 0;
drop(v, event);
/*
img.setBackgroundColor(Color.TRANSPARENT);
img2.setBackgroundColor(Color.TRANSPARENT);
if(status == 1){
if (dragging) {
img3.getHitRect(hitRect);
if (hitRect.contains(x, y)){
setSameAbsoluteLocation(img, img3);
}
}
} else if (status == 2){
if (dragging) {
img3.getHitRect(hitRect);
if (hitRect.contains(x, y)){
setSameAbsoluteLocation(img2, img3);
}
}
}
} */
//dragging = false;
}
return true;
}
});
}
private void setSameAbsoluteLocation(View v1, View v2) {
AbsoluteLayout.LayoutParams alp2 = (AbsoluteLayout.LayoutParams) v2.getLayoutParams();
setAbsoluteLocation(v1, alp2.x, alp2.y);
}
private void setAbsoluteLocationCentered(View v, int x, int y) {
setAbsoluteLocation(v, x - v.getWidth() / 2, y - v.getHeight() / 2);
}
private void setAbsoluteLocation(View v, int x, int y) {
AbsoluteLayout.LayoutParams alp = (AbsoluteLayout.LayoutParams) v.getLayoutParams();
alp.x = x;
alp.y = y;
v.setLayoutParams(alp);
}
private boolean checkHit(MotionEvent event, View hit){
Rect rhit = new Rect(hit.getLeft(), hit.getTop(), hit.getRight(), hit.getBottom());
return rhit.contains((int)event.getRawX(), (int)event.getRawY());
}
private boolean checkHit(View v, View hit){
Rect rv = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
Rect rhit = new Rect(hit.getLeft(), hit.getTop(), hit.getRight(), hit.getBottom());
return rv.intersect(rhit);
}
private void drop(View v, MotionEvent event){
checkHit(v, img3);
checkHit(event, img3);
// Do some for looping, do some other magic, do what you want
if(status == 1){
setSameAbsoluteLocation(img, img3);
}
else if (status == 2){
setSameAbsoluteLocation(img2, img3);
} else {
status = 0;
}
}
XML:
<AbsoluteLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/absLayout" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="34dp"
android:layout_y="50dp"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="142dp"
android:layout_y="328dp"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="101dp"
android:layout_y="50dp"
android:src="@drawable/ic_launcher" />
</AbsoluteLayout>
这里的问题是，当 status 等于 1 时，第一个 img 会到达放置目标，而 img2 也会到达。我想要的只是拖动的图像应该适合放置目标。你能帮我弄清楚我在这里缺少什么吗？谢谢。
编辑：
这是我的截图
