我正在尝试实现 android 的拖放示例。长按一个项目后,我将它拖到目标级别并放在那里。我在某种程度上是成功的。但我想要一些不同的东西。我做过这样的事情..
但我想将所有项目添加到 listView ,长按 listview 后我会选择一个项目,然后我会将项目拖到我的目标级别并将其放在那里。我想要这样的东西..
我的代码如下...
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.mango).setOnLongClickListener(longListen);
findViewById(R.id.orange).setOnLongClickListener(longListen);
findViewById(R.id.apple).setOnLongClickListener(longListen);
findViewById(R.id.banana).setOnLongClickListener(longListen);
findViewById(R.id.drop_here).setOnDragListener(DropListener);
listview.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int pos, long id) {
// TODO Auto-generated method stub
Log.i("long clicked","pos"+" "+pos);
return true;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
OnLongClickListener longListen = new OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
DragShadow dragShadow = new DragShadow(v);
ClipData data = ClipData.newPlainText("", "");
v.startDrag(data, dragShadow, v, 0);
return false;
}
};
private class DragShadow extends View.DragShadowBuilder {
ColorDrawable greyBox;
public DragShadow(View view) {
super(view);
// TODO Auto-generated constructor stub
greyBox = new ColorDrawable(Color.LTGRAY);
}
@Override
public void onDrawShadow(Canvas canvas) {
// TODO Auto-generated method stub
// super.onDrawShadow(canvas);
greyBox.draw(canvas);
}
@Override
public void onProvideShadowMetrics(Point shadowSize,
Point shadowTouchPoint) {
// TODO Auto-generated method stub
// super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
View v = getView();
int height = (int) v.getHeight() / 2;
int width = (int) v.getWidth() / 2;
greyBox.setBounds(0, 0, width, height);
shadowSize.set(width, height);
shadowTouchPoint.set(width / 2, height / 2);
}
}
OnDragListener DropListener = new View.OnDragListener() {
@Override
public boolean onDrag(View v, DragEvent event) {
// TODO Auto-generated method stub
int dragEvent = event.getAction();
switch (dragEvent) {
case DragEvent.ACTION_DRAG_ENTERED:
Log.i("Drag ", "Entered");
break;
case DragEvent.ACTION_DRAG_EXITED:
Log.i("Drag ", "Exit");
break;
case DragEvent.ACTION_DROP:
Log.i("Drag ", "Drop");
TextView target = (TextView) v;
TextView dragg = (TextView) event.getLocalState();
target.setText(dragg.getText());
break;
default:
break;
}
return true;
}
};
}
我已经尝试了一些教程,但我无法从那里获得解决方案。 Android列表视图拖放排序