1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.apis.view;
18
19import com.example.android.apis.R;
20
21import android.app.Activity;
22import android.os.Bundle;
23import android.view.DragEvent;
24import android.view.View;
25import android.widget.TextView;
26
27public class DragAndDropDemo extends Activity {
28    TextView mResultText;
29    DraggableDot mHiddenDot;
30
31    @Override
32    protected void onCreate(Bundle savedInstanceState) {
33        super.onCreate(savedInstanceState);
34        setContentView(R.layout.drag_layout);
35
36        TextView text = (TextView) findViewById(R.id.drag_text);
37        DraggableDot dot = (DraggableDot) findViewById(R.id.drag_dot_1);
38        dot.setReportView(text);
39        dot = (DraggableDot) findViewById(R.id.drag_dot_2);
40        dot.setReportView(text);
41        dot = (DraggableDot) findViewById(R.id.drag_dot_3);
42        dot.setReportView(text);
43
44        mHiddenDot = (DraggableDot) findViewById(R.id.drag_dot_hidden);
45        mHiddenDot.setReportView(text);
46
47        mResultText = (TextView) findViewById(R.id.drag_result_text);
48        mResultText.setOnDragListener(new View.OnDragListener() {
49            public boolean onDrag(View v, DragEvent event) {
50                final int action = event.getAction();
51                switch (action) {
52                    case DragEvent.ACTION_DRAG_STARTED: {
53                        // Bring up a fourth draggable dot on the fly. Note that it
54                        // is properly notified about the ongoing drag, and lights up
55                        // to indicate that it can handle the current content.
56                        mHiddenDot.setVisibility(View.VISIBLE);
57                    } break;
58
59                    case DragEvent.ACTION_DRAG_ENDED: {
60                        // Hide the surprise again
61                        mHiddenDot.setVisibility(View.INVISIBLE);
62
63                        // Report the drop/no-drop result to the user
64                        final boolean dropped = event.getResult();
65                        mResultText.setText(dropped ? "Dropped!" : "No drop");
66                    } break;
67                }
68                return false;
69            }
70        });
71    }
72}