相対レイアウトでオブジェクト(星、ハート)をドラッグする必要があるドラッグアンドドロップAndroidアプリケーションを作成しています。
私の問題は、オブジェクトをドラッグするたびにどこにでも行くことです。
これは私のコードです:
public class MainActivity extends Activity {
int _xDelta;
int _yDelta;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.myimage1).setOnTouchListener(new MyTouchListener());
findViewById(R.id.myimage2).setOnTouchListener(new MyTouchListener());
findViewById(R.id.myimage3).setOnTouchListener(new MyTouchListener());
findViewById(R.id.left).setOnDragListener(new MyDragListener());
findViewById(R.id.right).setOnDragListener(new MyDragListener());
}
これは私のタッチリスナーです:
private final class MyTouchListener implements OnTouchListener {
public boolean onTouch(View view, MotionEvent motionEvent) {
final int X = (int) motionEvent.getRawX();
final int Y = (int) motionEvent.getRawY();
switch (motionEvent.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
LinearLayout.LayoutParams lParams = (LinearLayout.LayoutParams) view.getLayoutParams();
_xDelta = X - lParams.leftMargin;
_yDelta = Y - lParams.topMargin;
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
view.startDrag(data, shadowBuilder, view, 0);
view.setVisibility(View.INVISIBLE);
break;
case MotionEvent.ACTION_UP:
break;
case MotionEvent.ACTION_POINTER_DOWN:
break;
case MotionEvent.ACTION_POINTER_UP:
break;
case MotionEvent.ACTION_MOVE:
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) view.getLayoutParams();
layoutParams.leftMargin = X - _xDelta;
layoutParams.topMargin = Y - _yDelta;
layoutParams.rightMargin = -250;
layoutParams.bottomMargin = -250;
view.setLayoutParams(layoutParams);
break;
}
return true;
}
}
そして、これは私のドラッグリスナーです:
class MyDragListener implements OnDragListener {
@Override
public boolean onDrag(View v, DragEvent event) {
int action = event.getAction();
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DROP:
// Dropped, reassign View to ViewGroup
View view = (View) event.getLocalState();
ViewGroup owner = (ViewGroup) view.getParent();
owner.removeView(view);
LinearLayout container = (LinearLayout) v;
container.addView(view);
view.setVisibility(View.VISIBLE);
break;
case DragEvent.ACTION_DRAG_ENDED:
default:
break;
}
return true;
}
}
これは私のレイアウトです：
<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="2"
android:columnWidth="300dp"
android:orientation="vertical"
android:rowCount="2"
android:stretchMode="columnWidth" >
<LinearLayout
android:id="@+id/topleft"
android:layout_width="478dp"
android:layout_height="200dp"
android:layout_column="0"
android:layout_row="0"
android:background="@drawable/shape"
android:orientation="vertical"
>
</LinearLayout>
<LinearLayout
android:id="@+id/topright"
android:layout_width="wrap_content"
android:layout_height="200dp"
android:layout_column="1"
android:layout_gravity="left"
android:layout_row="0"
android:background="@drawable/shape"
android:orientation="vertical" >
<ImageView
android:id="@+id/myimage2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/myimage1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/myimage3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
</LinearLayout>
あなたが私を助けてくれることを願っています！ありがとう