Drag & Drop-Auto-Scroll mit mehreren Layouts in Android
"Auto-Scroll funktioniert nicht sehr gut, wenn ich das Bild mit mehreren Layouts ziehe und ablege"
Ich habe überall gesucht, aber keine Lösung gefunden. Ich habe eine Lösung von diesem Link:
Erstellen Sie mit Drag & Drop in Android einen ScrollView-Autoscroll
@thehayro danke für so ein schönes Beispiel.
Es funktioniert jedoch nur für ein Layout, und der automatische Bildlauf wird ebenfalls ausgeführt. Aber ich habe mehr als 4-5 untergeordnete Layouts in einem linearen Layout und dieses Layout befindet sich in der Bildlaufansicht. Meine Layoutdatei sieht folgendermaßen aus:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.example.dragvdropdemo.MyScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/scroll_view">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/lldrag">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dip"
android:id="@+id/ll1"
android:layout_marginTop="10dip"
android:background="@android:color/darker_gray">
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/dr_logo" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/fb" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dip"
android:id="@+id/ll2"
android:layout_marginTop="10dip"
android:background="@android:color/darker_gray">
<ImageView
android:id="@+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/twitter" />
<ImageView
android:id="@+id/ImageView02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/ImageView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dip"
android:id="@+id/ll3"
android:layout_marginTop="10dip"
android:background="@android:color/darker_gray">
<ImageView
android:id="@+id/ImageView1_l3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/twitter" />
<ImageView
android:id="@+id/ImageView2_l3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/ImageView3_l3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dip"
android:id="@+id/ll4"
android:layout_marginTop="10dip"
android:background="@android:color/darker_gray">
<ImageView
android:id="@+id/ImageView1_l4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/twitter" />
<ImageView
android:id="@+id/ImageView2_l4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/ImageView3_l4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
</LinearLayout>
</LinearLayout>
</com.example.dragvdropdemo.MyScrollView>
Ich möchte ein Bild per Drag & Drop in ein anderes Layout ziehen. Ich weiß nicht, wie ich es lösen soll. Ich habe es versucht, aber ich könnte es tun. Ich weiß nicht genau, und mein Code lautet:
public class MyActivity extends Activity {
ImageView img1,img2,img3,img01;
ImageView img02,img03,img1_l3,img2_l3,img3_l3,img1_l4,img2_l4,img3_l4;
LinearLayout ll1,ll2,ll3,ll4,lldrag;
MyScrollView myScrollView;
int mScrollDistance;
private static int oldvalue;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.mylist);
//SCROLLVIEW
myScrollView = (MyScrollView) findViewById(R.id.scroll_view);
myScrollView.setOnScrollViewListener(new MyScrollView.OnScrollViewListener() {
@Override
public void onScrollChanged1(OnScrollViewListener listener) {
// TODO Auto-generated method stub
mScrollDistance = myScrollView.getScrollY();
}
});
img1 = (ImageView)findViewById(R.id.imageView1);
img2 = (ImageView)findViewById(R.id.imageView2);
img3 = (ImageView)findViewById(R.id.imageView3);
img01 = (ImageView)findViewById(R.id.ImageView01);
img02 = (ImageView)findViewById(R.id.ImageView02);
img03 = (ImageView)findViewById(R.id.ImageView03);
img1_l3 = (ImageView)findViewById(R.id.ImageView1_l3);
img2_l3 = (ImageView)findViewById(R.id.ImageView2_l3);
img3_l3 = (ImageView)findViewById(R.id.ImageView3_l3);
img1_l4 = (ImageView)findViewById(R.id.ImageView1_l4);
img2_l4 = (ImageView)findViewById(R.id.ImageView2_l4);
img3_l4 = (ImageView)findViewById(R.id.ImageView3_l4);
ll1 = (LinearLayout)findViewById(R.id.ll1);
ll2 = (LinearLayout)findViewById(R.id.ll2);
ll3 = (LinearLayout)findViewById(R.id.ll3);
ll4 = (LinearLayout)findViewById(R.id.ll4);
lldrag = (LinearLayout)findViewById(R.id.lldrag);
img1.setOnTouchListener(new ChoiceTouchListener());
img2.setOnTouchListener(new ChoiceTouchListener());
img3.setOnTouchListener(new ChoiceTouchListener());
img01.setOnTouchListener(new ChoiceTouchListener());
img02.setOnTouchListener(new ChoiceTouchListener());
img03.setOnTouchListener(new ChoiceTouchListener());
img1_l3.setOnTouchListener(new ChoiceTouchListener());
img2_l3.setOnTouchListener(new ChoiceTouchListener());
img3_l3.setOnTouchListener(new ChoiceTouchListener());
img1_l4.setOnTouchListener(new ChoiceTouchListener());
img2_l4.setOnTouchListener(new ChoiceTouchListener());
img3_l4.setOnTouchListener(new ChoiceTouchListener());
ll1.setOnDragListener(new ChoiceDragListener());
ll2.setOnDragListener(new ChoiceDragListener());
ll3.setOnDragListener(new ChoiceDragListener());
ll4.setOnDragListener(new ChoiceDragListener());
lldrag.setOnDragListener(new ChoiceDragListener());
}
private final class ChoiceTouchListener implements OnTouchListener {
@Override
public boolean onTouch(View view, MotionEvent event) {
// TODO Auto-generated method stub
ClipData data=ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
//start dragging the item touched''
view.startDrag(data, shadowBuilder, view, 0);
return true;
}
}
/**
* DragListener will handle dragged views being dropped on the drop area
* - only the drop action will have processing added to it as we are not
* - amending the default behavior for other parts of the drag process
*
*/
class ChoiceDragListener implements OnDragListener {
@Override
public boolean onDrag(View v, DragEvent event) {
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
//no action necessary
Log.i("", "DRAGSTARTED");
break;
case DragEvent.ACTION_DRAG_ENTERED:
//no action necessary
Log.i("","DRAGENTERED");
break;
case DragEvent.ACTION_DRAG_EXITED:
//no action necessary
Log.i("","DRAGEXITED");
break;
case DragEvent.ACTION_DROP:
//handle the dragged view being dropped over a drop view
Log.i("","DROP");
View view = (View) event.getLocalState();
LinearLayout ll=(LinearLayout) view.getParent();
ll.removeView(view);
LinearLayout dropTarget = (LinearLayout) v;
ImageView dropped = (ImageView) view;
dropTarget.addView(dropped,0);
Object tag = dropTarget.getTag();
if(tag!=null)
{
int existingID = (Integer)tag;
findViewById(existingID).setVisibility(View.VISIBLE);
}
//set the tag in the target view being dropped on - to the ID of the view being dropped
dropTarget.setTag(dropped.getId());
break;
case DragEvent.ACTION_DRAG_LOCATION:
//no action necessary
int y = Math.round(event.getY());
int translatedY = y - mScrollDistance;
Log.i("translated",""+translatedY+" "+ mScrollDistance+" "+y);
int threshold =50 ;
// make a scrolling up due the y has passed the threshold
if (translatedY < threshold) {
// make a scroll up by 30 px
myScrollView.scrollBy(0, -30);
}
// make a autoscrolling down due y has passed the 500 px border
if (translatedY + threshold > 200) {
// make a scroll down by 30 px
myScrollView.scrollBy(0, 30);
}
break;
case DragEvent.ACTION_DRAG_ENDED:
//no action necessary
break;
default:
break;
}
return true;
}
}
}
MySrollView
public class MyScrollView extends ScrollView {
public OnScrollViewListener mListener;
public MyScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
// TODO Auto-generated method stub
super.onScrollChanged(l, t, oldl, oldt);
if (mListener != null) {
mListener.onScrollChanged1(mListener);
}
}
public void setOnScrollViewListener(OnScrollViewListener listener) {
mListener = listener;
}
public static interface OnScrollViewListener {
public void onScrollChanged1(OnScrollViewListener listener);
}
}
Ich bin Android-Anfänger, weiß es also nicht so genau, also sag mir, wie ich es lösen soll. Entschuldigung für meinen schlechten Englisch- und Grammerfehler. Vielen Dank im Voraus