Android调用手机拍照以及从相册选择照片

[java]  view plain copy

1. /*用来标识请求照相功能的activity*/  
2.     private static final int CAMERA_WITH_DATA = 3023;  
3.   
4.     /*用来标识请求gallery的activity*/  
5.     private static final int PHOTO_PICKED_WITH_DATA = 3021;  
6.   
7.     /*拍照的照片存储位置*/  
8.     private static final File PHOTO_DIR = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera");  
9.   
10.     private File mCurrentPhotoFile;//照相机拍照得到的图片   

[java]  view plain copy

1. private void doPickPhotoAction() {  
2.             Context context = EditContact.this;  
3.           
4.             // Wrap our context to inflate list items using correct theme  
5.             final Context dialogContext = new ContextThemeWrapper(context,  
6.                     android.R.style.Theme_Light);  
7.             String cancel="返回";  
8.             String[] choices;  
9.             choices = new String[2];  
10.             choices[0] = getString(R.string.take_photo);  //拍照  
11.             choices[1] = getString(R.string.pick_photo);  //从相册中选择  
12.             final ListAdapter adapter = new ArrayAdapter<String>(dialogContext,  
13.                     android.R.layout.simple_list_item_1, choices);  
14.           
15.             final AlertDialog.Builder builder = new AlertDialog.Builder(  
16.                     dialogContext);  
17.             builder.setTitle(R.string.attachToContact);  
18.             builder.setSingleChoiceItems(adapter, -1,  
19.                     new DialogInterface.OnClickListener() {  
20.                         public void onClick(DialogInterface dialog, int which) {  
21.                             dialog.dismiss();  
22.                             switch (which) {  
23.                             case 0:{  
24.                                 String status=Environment.getExternalStorageState();  
25.                                 if(status.equals(Environment.MEDIA_MOUNTED)){//判断是否有SD卡  
26.                                     doTakePhoto();// 用户点击了从照相机获取  
27.                                 }  
28.                                 else{  
29.                                     showToast("没有SD卡");  
30.                                 }  
31.                                 break;  
32.                                   
33.                             }  
34.                             case 1:  
35.                                 doPickPhotoFromGallery();// 从相册中去获取  
36.                                 break;  
37.                             }  
38.                         }  
39.                     });  
40.             builder.setNegativeButton(cancel, new DialogInterface.OnClickListener() {  
41.           
42.                 @Override  
43.                 public void onClick(DialogInterface dialog, int which) {  
44.                     dialog.dismiss();  
45.                 }  
46.                   
47.             });  
48.             builder.create().show();  
49.         }  
50.     }  
51.       
52.     /** 
53.     * 拍照获取图片 
54.     *  
55.     */  
56.     protected void doTakePhoto() {  
57.         try {  
58.             // Launch camera to take photo for selected contact  
59.             PHOTO_DIR.mkdirs();// 创建照片的存储目录  
60.             mCurrentPhotoFile = new File(PHOTO_DIR, getPhotoFileName());// 给新照的照片文件命名  
61.             final Intent intent = getTakePickIntent(mCurrentPhotoFile);  
62.             startActivityForResult(intent, CAMERA_WITH_DATA);  
63.         } catch (ActivityNotFoundException e) {  
64.             Toast.makeText(this, R.string.photoPickerNotFoundText,  
65.                     Toast.LENGTH_LONG).show();  
66.         }  
67.     }  
68.       
69.     public static Intent getTakePickIntent(File f) {  
70.         Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE, null);  
71.         intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));  
72.         return intent;  
73.     }  
74.       
75.     /** 
76.     * 用当前时间给取得的图片命名 
77.     *  
78.     */  
79.     private String getPhotoFileName() {  
80.         Date date = new Date(System.currentTimeMillis());  
81.         SimpleDateFormat dateFormat = new SimpleDateFormat(  
82.                 "'IMG'_yyyy-MM-dd HH:mm:ss");  
83.         return dateFormat.format(date) + ".jpg";  
84.     }  
85.       
86.     // 请求Gallery程序  
87.     protected void doPickPhotoFromGallery() {  
88.         try {  
89.             // Launch picker to choose photo for selected contact  
90.             final Intent intent = getPhotoPickIntent();  
91.             startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);  
92.         } catch (ActivityNotFoundException e) {  
93.             Toast.makeText(this, R.string.photoPickerNotFoundText1,  
94.                     Toast.LENGTH_LONG).show();  
95.         }  
96.     }  
97.       
98.     // 封装请求Gallery的intent  
99.     public static Intent getPhotoPickIntent() {  
100.         Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);  
101.         intent.setType("image/*");  
102.         intent.putExtra("crop", "true");  
103.         intent.putExtra("aspectX", 1);  
104.         intent.putExtra("aspectY", 1);  
105.         intent.putExtra("outputX", 80);  
106.         intent.putExtra("outputY", 80);  
107.         intent.putExtra("return-data", true);  
108.         return intent;  
109.     }  
110.       
111.     // 因为调用了Camera和Gally所以要判断他们各自的返回情况,他们启动时是这样的startActivityForResult  
112.     protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
113.         if (resultCode != RESULT_OK)  
114.             return;  
115.         switch (requestCode) {  
116.             case PHOTO_PICKED_WITH_DATA: {// 调用Gallery返回的  
117.                 final Bitmap photo = data.getParcelableExtra("data");  
118.                 // 下面就是显示照片了  
119.                 System.out.println(photo);  
120.                 //缓存用户选择的图片  
121.                 img = getBitmapByte(photo);  
122.                 mEditor.setPhotoBitmap(photo);  
123.                 System.out.println("set new photo");  
124.                 break;  
125.             }  
126.             case CAMERA_WITH_DATA: {// 照相机程序返回的,再次调用图片剪辑程序去修剪图片  
127.                 doCropPhoto(mCurrentPhotoFile);  
128.                 break;  
129.             }  
130.         }  
131.     }  
132.       
133.     protected void doCropPhoto(File f) {  
134.         try {  
135.             // 启动gallery去剪辑这个照片  
136.             final Intent intent = getCropImageIntent(Uri.fromFile(f));  
137.             startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);  
138.         } catch (Exception e) {  
139.             Toast.makeText(this, R.string.photoPickerNotFoundText,  
140.                     Toast.LENGTH_LONG).show();  
141.         }  
142.     }  
143.       
144.     /**  
145.     * Constructs an intent for image cropping. 调用图片剪辑程序  
146.     */  
147.     public static Intent getCropImageIntent(Uri photoUri) {  
148.         Intent intent = new Intent("com.android.camera.action.CROP");  
149.         intent.setDataAndType(photoUri, "image/*");  
150.         intent.putExtra("crop", "true");  
151.         intent.putExtra("aspectX", 1);  
152.         intent.putExtra("aspectY", 1);  
153.         intent.putExtra("outputX", 80);  
154.         intent.putExtra("outputY", 80);  
155.         intent.putExtra("return-data", true);  
156.         return intent;  
157.     }