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@h6ah4i
Last active October 18, 2018 14:25
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package com.h6ah4i.android.example.dragdrop;
import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Point;
import android.os.Bundle;
import android.view.DragEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.DragShadowBuilder;
import android.view.View.OnDragListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
ListView lv = (ListView) findViewById(android.R.id.list);
List<String> items = new ArrayList<>();
for (int i = 0; i < 20; i++) {
items.add(Integer.toString(i));
}
lv.setAdapter(new MyAdapter(items));
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
//
// start dragging
//
MyAdapter.ViewHolder vh = (MyAdapter.ViewHolder) view.getTag();
final int touchedX = (int) (vh.lastTouchedX + 0.5f);
final int touchedY = (int) (vh.lastTouchedY + 0.5f);
view.startDrag(null, new DragShadowBuilder(view) {
@Override
public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) {
super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
shadowTouchPoint.x = touchedX;
shadowTouchPoint.y = touchedY;
}
@Override
public void onDrawShadow(Canvas canvas) {
super.onDrawShadow(canvas);
}
}, view, 0);
view.setVisibility(View.INVISIBLE);
return true;
}
});
lv.setOnDragListener(new OnDragListener() {
@Override
public boolean onDrag(View v, DragEvent event) {
if (event.getAction() == DragEvent.ACTION_DROP) {
//
// finish dragging
//
View view = (View) event.getLocalState();
view.setVisibility(View.VISIBLE);
}
return true;
}
});
}
static class MyAdapter extends BaseAdapter implements OnTouchListener {
private List<String> mItems;
private static class ViewHolder {
public TextView text;
public float lastTouchedX;
public float lastTouchedY;
public ViewHolder(View v) {
text = (TextView) v;
}
}
MyAdapter(List<String> items) {
mItems = items;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
ViewHolder vh;
if (convertView == null) {
view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
view.setOnTouchListener(this);
vh = new ViewHolder(view);
view.setTag(vh);
} else {
view = convertView;
vh = (ViewHolder) view.getTag();
}
vh.text.setText(mItems.get(position));
return view;
}
@Override
public int getItemViewType(int position) {
return 0;
}
@Override
public int getCount() {
return mItems.size();
}
@Override
public Object getItem(int position) {
return mItems.get(position);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
ViewHolder vh = (ViewHolder) v.getTag();
vh.lastTouchedX = event.getX();
vh.lastTouchedY = event.getY();
return false;
}
}
}
@samirsamedow
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unfortunately drop is not working

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