Android calls photo album to achieve system control scaling and image Cutting

Http://blog.csdn.net/xys289187120/article/details/6575830

In Android, if you want to process images, you can call the system controls to achieve very good effects of scaling and cutting images. Today, I wrote a demo to share with you.

[Java]
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1. Package CN. m15.test;
3. Import java. Io. bytearrayoutputstream;
4. Import java. Io. file;
5. Import Android. App. activity;
6. Import Android. content. intent;
7. Import Android. Graphics. Bitmap;
8. Import android.net. Uri;
9. Import Android. OS. Bundle;
10. Import Android. OS. environment;
11. Import Android. provider. mediastore;
12. Import Android. View. view;
13. Import Android. View. View. onclicklistener;
14. Import Android. widget. Button;
15. Import Android. widget. imageview;
17. Public class testactivity
    Extends activity {
19. Public static
    Final int none =
    0;
20. Public static
    Final int photohraph = 1; // photograph
21. Public static
    Final int photozoom =
    2; // zoom
22. Public static
    Final int photoresoult =
    3; // result
24. Public static
    Final string image_unspecified = "image /*";
25. Imageview = NULL;
26. Button button0 = NULL;
27. Button button1 = NULL;
29. @ Override
30. Public void oncreate (bundle savedinstancestate ){
31. Super. oncreate (savedinstancestate );
32. Setcontentview (R. layout. Main );
33. Imageview = (imageview) findviewbyid (R. Id. imageid );
34. Button0 = (button) findviewbyid (R. Id. btn_01 );
35. Button1 = (button) findviewbyid (R. Id. btn_02 );
37. Button0.setonclicklistener (New onclicklistener (){
38. @ Override
39. Public void onclick (view v ){
40. Intent intent = new intent (intent. action_pick,
    Null );
41. Intent. setdataandtype (mediastore. Images. Media. external_content_uri, image_unspecified );
42. Startactivityforresult (intent, photozoom );
43. }
44. });
46. Button1.setonclicklistener (New onclicklistener (){
48. @ Override
49. Public void onclick (view v ){
50. Intent intent = new intent (mediastore. action_image_capture );
51. Intent. putextra (mediastore. extra_output, Uri. fromfile (new file (environment. getexternalstoragedirectory (),
    "Temp.jpg ")));
52. Startactivityforresult (intent, photohraph );
53. }
54. });
55. }
57. @ Override
58. Protected void onactivityresult (INT requestcode,
    Int resultcode, intent data ){
59. If (resultcode = none)
60. Return;
61. // Take a photo
62. If (requestcode = photohraph ){
63. // Set the file storage path, which is stored in the following directory.
64. File picture = new file (environment. getexternalstoragedirectory () +
    "/Temp.jpg ");
65. Startphotozoom (URI. fromfile (picture ));
66. }
68. If (Data = NULL)
69. Return;
71. // Read the scaled image of the album
72. If (requestcode = photozoom ){
73. Startphotozoom (data. getdata ());
74. }
75. // Processing result
76. If (requestcode = photoresoult ){
77. Bundle extras = data. getextras ();
78. If (extras! = NULL ){
79. Bitmap photo = extras. getparcelable ("data ");
80. Bytearrayoutputstream stream = new bytearrayoutputstream ();
81. Photo. Compress (bitmap. compressformat. JPEG, 75, stream); // (0-100) compressed file
82. Imageview. setimagebitmap (photo );
83. }
85. }
87. Super. onactivityresult (requestcode, resultcode, data );
88. }
90. Public void startphotozoom (URI ){
91. Intent intent = new intent ("com. Android. Camera. Action. Crop ");
92. Intent. setdataandtype (Uri, image_unspecified );
93. Intent. putextra ("crop ",
    "True ");
94. // Aspectx aspecty is the aspect ratio
95. Intent. putextra ("aspectx ",
    1 );
96. Intent. putextra ("aspecty", 1 );
97. // Outputx outputy indicates the width and height of the cropped image.
98. Intent. putextra ("outputx", 64 );
99. Intent. putextra ("outputy ",
    64 );
100. Intent. putextra ("Return-Data ",
     True );
101. Startactivityforresult (intent, photoresoult );
102. }
103. }

Package CN. m15.test; </P> <p> Import Java. io. bytearrayoutputstream; <br/> Import Java. io. file; <br/> Import android. app. activity; <br/> Import android. content. intent; <br/> Import android. graphics. bitmap; <br/> Import android.net. uri; <br/> Import android. OS. bundle; <br/> Import android. OS. environment; <br/> Import android. provider. mediastore; <br/> Import android. view. view; <br/> Import android. view. view. oncli Cklistener; <br/> Import android. widget. button; <br/> Import android. widget. imageview; </P> <p> public class testactivity extends activity {</P> <p> Public static final int none = 0; <br/> Public static final int photohraph = 1; // photograph <br/> Public static final int photozoom = 2; // scale <br/> Public static final int photoresoult = 3; // result </P> <p> Public static final string image_unspecified = "image /*"; <br/> IMA Geview imageview = NULL; <br/> button button0 = NULL; <br/> button button1 = NULL; </P> <p> @ override <br/> Public void oncreate (bundle savedinstancestate) {<br/> super. oncreate (savedinstancestate); <br/> setcontentview (R. layout. main); <br/> imageview = (imageview) findviewbyid (R. id. imageid); <br/> button0 = (button) findviewbyid (R. id. btn_01); <br/> button1 = (button) findviewbyid (R. id. btn_02); </P> <p> button 0. setonclicklistener (New onclicklistener () {<br/> @ override <br/> Public void onclick (view v) {<br/> intent = new intent (intent. action_pick, null); <br/> intent. setdataandtype (mediastore. images. media. external_content_uri, image_unspecified); <br/> startactivityforresult (intent, photozoom); <br/>}< br/> }); </P> <p> button1.setonclicklistener (New onclicklistener () {</P> <p> @ override <br/> Public void Onclick (view v) {<br/> intent = new intent (mediastore. action_image_capture); <br/> intent. putextra (mediastore. extra_output, Uri. fromfile (new file (environment. getexternalstoragedirectory (), "temp.jpg"); <br/> startactivityforresult (intent, photohraph); <br/>}< br/> }); <br/>}</P> <p> @ override <br/> protected void onactivityresult (INT requestcode, int resultcode, intent data) {<br/> If (resultc Ode = none) <br/> return; <br/> // photograph <br/> If (requestcode = photohraph) {<br/> // set the file storage path, which is stored in the following directory <br/> file picture = new file (environment. getexternalstoragedirectory () + "/temp.jpg"); <br/> startphotozoom (URI. fromfile (picture); <br/>}</P> <p> If (Data = NULL) <br/> return; </P> <p> // read the scaled image of the album. <br/> If (requestcode = photozoom) {<br/> startphotozoom (data. getdata (); <br/>}< br/> // processing result <br/> If (reque Stcode = photoresoult) {<br/> bundle extras = data. getextras (); <br/> If (extras! = NULL) {<br/> bitmap photo = extras. getparcelable ("data"); <br/> bytearrayoutputstream stream = new bytearrayoutputstream (); <br/> photo. compress (bitmap. compressformat. JPEG, 75, stream); // (0-100) compressed file <br/> imageview. setimagebitmap (photo); <br/>}</P> <p> super. onactivityresult (requestcode, resultcode, data); <br/>}</P> <p> Public void startphotozoom (URI) {<br/> intent = new intent ("com. android. camera. action. crop "); <br/> intent. setdataandtype (Uri, image_unspecified); <br/> intent. putextra ("crop", "true"); <br/> // aspectx aspecty is the ratio of width to height <br/> intent. putextra ("aspectx", 1); <br/> intent. putextra ("aspecty", 1); <br/> // outputx outputy is the width and height of the cropped image. <br/> intent. putextra ("outputx", 64); <br/> intent. putextra ("outputy", 64); <br/> intent. putextra ("Return-Data", true); <br/> startactivityforresult (intent, photoresoult); <br/>}< br/>}[HTML]
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1. <? XML
   Version = "1.0"
   Encoding = "UTF-8"?>
2. <Linearlayout
   Xmlns: Android = "http://schemas.android.com/apk/res/android"
3. Android: Orientation = "vertical"
   Android: layout_width = "fill_parent"
4. Android: layout_height = "fill_parent">
5. <Textview
   Android: layout_width = "fill_parent"
6. Android: layout_height = "wrap_content"
   Android: text = "@ string/hello"
   />
7. <Imageview
   Android: Id = "@ + ID/imageid"
8. Android: adjustviewbounds = "true"
   Android: maxwidth = "50dip"
9. Android: maxheight = "50dip"
   Android: layout_width = "wrap_content"
10. Android: layout_height = "wrap_content"
    />
11. <Button
    Android: Id = "@ + ID/btn_01"
    Android: layout_height = "50dip"
12. Android: text = "album"
    Android: layout_width = "150dip"/>
13. <Button
    Android: Id = "@ + ID/btn_02"
    Android: layout_height = "50dip"
14. Android: text = "photo"
    Android: layout_width = "150dip"/>
15. </Linearlayout>