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 17 package com.example.android.apis.view; 18 19 import com.example.android.apis.R; 20 21 import android.app.Activity; 22 import android.os.Bundle; 23 import android.view.DragEvent; 24 import android.view.View; 25 import android.widget.TextView; 26 27 public class DragAndDropDemo extends Activity { 28 TextView mResultText; 29 DraggableDot mHiddenDot; 30 31 @Override onCreate(Bundle savedInstanceState)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 }