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嗨所有m試圖實現3.0.i拖放已經通過在開發人員的網站給出的例子,但m面臨問題,而drop.Here是我的代碼,能夠拖動圖像查看,但不能放棄它。任何一個PLZ告訴我什麼是問題或提供任何示例代碼?Drag and Drop in 3.0
setContentView(R.layout.main);
iv=(ImageView)findViewById(R.id.iv);
lv=(RelativeLayout)findViewById(R.id.lv);
lv.setOnDragListener(this);
iv.setTag("HELLOOO");
iv.setOnLongClickListener(this);
}
public boolean onDrag(View v, DragEvent event) {
CharSequence dragData;
switch(event.getAction()){
case DragEvent.ACTION_DRAG_STARTED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
insideOfMe = true;
break;
case DragEvent.ACTION_DRAG_LOCATION:
break;
case DragEvent.ACTION_DRAG_ENDED:
break;
case DragEvent.ACTION_DRAG_EXITED:
insideOfMe = false;
break;
case DragEvent.ACTION_DROP:
break;
}
return true;
}
public static class Shadow extends View.DragShadowBuilder{
Drawable d;
public Shadow(View v,Context context){
super(v);
d=context.getResources().getDrawable(R.drawable.icon);
}
@Override
public void onProvideShadowMetrics(Point shadowSize,
Point shadowTouchPoint) {
// TODO Auto-generated method stub
int width,height;
width=getView().getWidth();
height=getView().getHeight();
d.setBounds(0,0,width,height);
shadowSize.set(width, height);
shadowTouchPoint.set(width/2, height/2);
}
public void onDrawShadow(Canvas canvas){
canvas.save();
d.draw(canvas);
canvas.restore();
}
}
public boolean onLongClick(View v) {
ClipData.Item item = new ClipData.Item((CharSequence) v.getTag());
ClipDescription NOTE_STREAM_TYPES = new ClipDescription((CharSequence)
v.getTag(),new String[] { ClipDescription.MIMETYPE_TEXT_PLAIN });
ClipData data = new ClipData(NOTE_STREAM_TYPES, item);
shadow=new Shadow(v,getApplicationContext());
v.startDrag(data, shadow,null,0);
return false;
}
感謝
u能PLZ告訴我,我應該怎麼辦???? – dharan
更新了我的答案 –