Android Development experience at random click on the picture to move the text

As long as within the image range, the text can be arbitrarily clicked to move.

[Java]View PlainCopy

2. Package Xiaosi. Gettextimage;
8. Import Android.content.Context;
10. Import android.content.res.Resources;
12. Import Android.graphics.Bitmap;
14. Import Android.graphics.BitmapFactory;
16. Import Android.graphics.Canvas;
18. Import Android.graphics.Paint;
20. Import Android.util.DisplayMetrics;
22. Import android.view.MotionEvent;
24. Import Android.view.View;
26. Import Android.view.WindowManager;
30. Public class Gettextimage extends View
32. {
34. private Float x = , y = 40;
36. private static float windowwidth;
38. private static float windowheight;
40. private static float left = 0; //Picture in the screen position x coordinate
42. private static float top = 0; //Picture in the screen position y coordinate
44. private String str = "I love You";
46. private displaymetrics DM = new Displaymetrics (); //To get the height and width of the screen
48. private WindowManager WindowManager;
50. private Bitmap Newbitmap;
54. Public Gettextimage (context context)
56. {
58. super (context);
60. WindowManager = (WindowManager) context
62. . Getsystemservice (Context.window_service);
64. //width of the screen
66. WindowWidth = Windowmanager.getdefaultdisplay (). GetWidth ();
68. //height of screen
70. WindowHeight = Windowmanager.getdefaultdisplay (). GetHeight ();
72. }
76. public void OnDraw (canvas canvas)
78. {
80. Resources res = getresources ();
82. Bitmap BMP = Bitmapfactory.decoderesource (res, r.drawable.b);
84. Newbitmap = gettextimage (BMP, str, x, y);
86. Canvas.drawbitmap (Newbitmap, 0, 0, null);
88. }
90. /** 
92. * Return value: Bitmap parameter: Original picture, text function: generate the corresponding picture according to the given text
94. *
96. * @param originalmap
98. * @param text text
100. * @param x Click X-coordinate
102. * y-coordinate @param y-click
104. * @return
106. */
108. public static Bitmap gettextimage (Bitmap originalmap, String text, float x,
110. float y)
112. {
114. float bitmapwidth = Originalmap.getwidth ();
116. float bitmapheight = Originalmap.getheight ();
118. //define Canvas
120. Canvas canvas = new Canvas (ORIGINALMAP);
122. //define brushes
124. Paint paint = new paint ();
126. //Get the length of the text (in pixels)
128. float textWidth = paint.measuretext (text);
130. Canvas.drawbitmap (Originalmap, 0, 0, null);
134. //If the picture width is less than the screen width
136. if (left + bitmapwidth < windowwidth)
138. {
140. //Right Border
142. if (x >= left + bitmapwidth-textwidth)
144. {
146. x = left + bitmapwidth-textwidth;
148. }
150. //Left Border
152. Else if (x <= left)
154. {
156. x = left;
158. }
160. }
162. Else
164. {
166. //Right Border
168. if (x >= windowwidth-textwidth)
170. {
172. x = Windowwidth-textwidth;
174. }
176. //Left Border
178. Else if (x <= 0)
180. {
182. x = 0;
184. }
186. }
188. //If the picture height is less than the screen height
190. if (top + bitmapheight < WindowHeight)
192. {
194. //Down
196. if (y >= top + bitmapheight)
198. {
200. y = top + bitmapheight;
202. }
204. //On
206. Else if (y <= top + Ten)
208. {
210. y = top + 10;
212. }
214. }
216. Else
218. {
220. if (y >= windowheight)
222. {
224. y = windowheight;
226. }
228. Else if (y <= 0)
230. {
232. y = 0;
234. }
236. }
240. //Add word
242. Canvas.drawtext (text, x, y, paint);
244. return originalmap;
246. }
248. @Override
250. Public Boolean ontouchevent (Motionevent event)
252. {
254. if (event.getaction () = = Motionevent.action_down)
256. {
258. x = Event.getx ();
260. y = event.gety ();
262. // Redraw
264. Invalidate ();
266. }
268. return true;
270. }
272. }

[Java]View PlainCopy

2. Package Xiaosi. Gettextimage;
6. Import android.app.Activity;
8. Import Android.os.Bundle;
12. Public class Gettextimageactivity extends Activity {
14. /** Called when the activity is first created. * /
16. private Gettextimage get;
18. @Override
20. public void OnCreate (Bundle savedinstancestate) {
22. super.oncreate (savedinstancestate);
24. get = new Gettextimage (this);
26. Setcontentview (get);
28. }
30. }

Android Development experience at random click on the picture to move the text