典型的使用場景就是要設置一個頭像，頭像需要從系統圖庫或者拍照獲得，在android4.4之前，我用的代碼沒問題，但是今天使用android4.4的時候突然發現不靈了。baidu了一圈，終于解決了。
下面是解決方案：
1.privateString[]?items?=newString[]?{"圖庫","拍照"};
2./*頭像名稱*/
3.privatestaticfinalString?IMAGE_FILE_NAME?="face.jpg";
4./*請求碼*/
5.privatestaticfinalintIMAGE_REQUEST_CODE?=0;
6.privatestaticfinalintSELECT_PIC_KITKAT?=3;
7.privatestaticfinalintCAMERA_REQUEST_CODE?=1;
8.privatestaticfinalintRESULT_REQUEST_CODE?=2;
9.
10.privatevoidshowSettingFaceDialog()?{
11.
12.newAlertDialog.Builder(this)
13..setTitle("圖片來源")
14..setCancelable(true)
15..setItems(items,newDialogInterface.OnClickListener()?{
16.
17.@Override
18.publicvoidonClick(DialogInterface?dialog,intwhich)?{
19.switch(which)?{
20.case0://?Local?Image
21.Intent?intent=newIntent(Intent.ACTION_GET_CONTENT);
22.intent.addCategory(Intent.CATEGORY_OPENABLE);
23.intent.setType("image/*");
24.if(android.os.Build.VERSION.SDK_INT?>=?android.os.Build.VERSION_CODES.KITKAT)?{
25.startActivityForResult(intent,SELECT_PIC_KITKAT);
26.}else{
27.startActivityForResult(intent,IMAGE_REQUEST_CODE);
28.}
29.break;
30.case1://?Take?Picture
31.Intent?intentFromCapture?=newIntent(
32.MediaStore.ACTION_IMAGE_CAPTURE);
33.//判斷存儲卡是否可以用，可用進行存儲
34.if(hasSdcard())?{
35.intentFromCapture.putExtra(
36.MediaStore.EXTRA_OUTPUT,
37.Uri.fromFile(newFile(Environment
38..getExternalStorageDirectory(),
39.IMAGE_FILE_NAME)));
40.}
41.startActivityForResult(intentFromCapture,
42.CAMERA_REQUEST_CODE);
43.break;
44.}
45.}
46.})
47..setNegativeButton("取消",
48.newDialogInterface.OnClickListener()?{
49.
50.@Override
51.publicvoidonClick(DialogInterface?dialog,
52.intwhich)?{
53.dialog.dismiss();
54.}
55.}).show();
56.
57.}
58.
59.@Override
60.protectedvoidonActivityResult(intrequestCode,intresultCode,?Intent?data)?{
61.//結果碼不等于取消時候
62.if(resultCode?!=?RESULT_CANCELED)?{
63.switch(requestCode)?{
64.caseIMAGE_REQUEST_CODE:
65.startPhotoZoom(data.getData());
66.break;
67.caseSELECT_PIC_KITKAT:
68.startPhotoZoom(data.getData());
69.break;
70.caseCAMERA_REQUEST_CODE:
71.if(hasSdcard())?{
72.File?tempFile?=newFile(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);
73.startPhotoZoom(Uri.fromFile(tempFile));
74.}else{
75.ToastUtils.showShort(context,"未找到存儲卡，無法存儲照片！");
76.}
77.
78.break;
79.caseRESULT_REQUEST_CODE:
80.if(data?!=null)?{
81.setImageToView(data,iv_face);
82.}
83.break;
84.}
85.}
86.super.onActivityResult(requestCode,?resultCode,?data);
87.}
88.
89./**
90.*裁剪圖片方法實現
91.*
92.*@paramuri
93.*/
94.publicvoidstartPhotoZoom(Uri?uri)?{
95.if(uri?==null)?{
96.Log.i("tag","The?uri?is?not?exist.");
97.return;
98.}
99.
100.Intent?intent?=newIntent("com.android.camera.action.CROP");
101.if(android.os.Build.VERSION.SDK_INT?>=?android.os.Build.VERSION_CODES.KITKAT)?{
102.String?url=getPath(context,uri);
103.intent.setDataAndType(Uri.fromFile(newFile(url)),"image/*");
104.}else{
105.intent.setDataAndType(uri,"image/*");
106.}
107.
108.//設置裁剪
109.intent.putExtra("crop","true");
110.//?aspectX?aspectY是寬高的比例
111.intent.putExtra("aspectX",1);
112.intent.putExtra("aspectY",1);
113.//?outputX?outputY是裁剪圖片寬高
114.intent.putExtra("outputX",200);
115.intent.putExtra("outputY",200);
116.intent.putExtra("return-data",true);
117.startActivityForResult(intent,?RESULT_REQUEST_CODE);
118.}
119.
120./**
121.*保存裁剪之后的圖片數據
122.*
123.*@parampicdata
124.*/
125.privatevoidsetImageToView(Intent?data,ImageView?imageView)?{
126.Bundle?extras?=?data.getExtras();
127.if(extras?!=null)?{
128.Bitmap?photo?=?extras.getParcelable("data");
129.Bitmap?roundBitmap=ImageUtil.toRoundBitmap(photo);
130.imageView.setImageBitmap(roundBitmap);
131.saveBitmap(photo);
132.}
133.}
134.
135.publicvoidsaveBitmap(Bitmap?mBitmap)?{
136.File?f?=newFile(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);
137.try{
138.f.createNewFile();
139.FileOutputStream?fOut?=null;
140.fOut?=newFileOutputStream(f);
141.mBitmap.compress(Bitmap.CompressFormat.JPEG,100,?fOut);
142.fOut.flush();
143.fOut.close();
144.}catch(FileNotFoundException?e)?{
145.e.printStackTrace();
146.}catch(IOException?e)?{
147.e.printStackTrace();
148.}
149.}
150.
151.
152.//以下是關鍵，原本uri返回的是file:///...來著的，android4.4返回的是content:///...
153.@SuppressLint("NewApi")
154.publicstaticString?getPath(finalContext?context,finalUri?uri)?{
155.
156.finalbooleanisKitKat?=?Build.VERSION.SDK_INT?>=?Build.VERSION_CODES.KITKAT;
157.
158.//?DocumentProvider
159.if(isKitKat?&&?DocumentsContract.isDocumentUri(context,?uri))?{
160.//?ExternalStorageProvider
161.if(isExternalStorageDocument(uri))?{
162.finalString?docId?=?DocumentsContract.getDocumentId(uri);
163.finalString[]?split?=?docId.split(":");
164.finalString?type?=?split[0];
165.
166.if("primary".equalsIgnoreCase(type))?{
167.returnEnvironment.getExternalStorageDirectory()?+"/"+?split[1];
168.}
169.
170.}
171.//?DownloadsProvider
172.elseif(isDownloadsDocument(uri))?{
173.finalString?id?=?DocumentsContract.getDocumentId(uri);
174.finalUri?contentUri?=?ContentUris.withAppendedId(
175.Uri.parse("content://downloads/public_downloads"),?Long.valueOf(id));
176.
177.returngetDataColumn(context,?contentUri,null,null);
178.}
179.//?MediaProvider
180.elseif(isMediaDocument(uri))?{
181.finalString?docId?=?DocumentsContract.getDocumentId(uri);
182.finalString[]?split?=?docId.split(":");
183.finalString?type?=?split[0];
184.
185.Uri?contentUri?=null;
186.if("image".equals(type))?{
187.contentUri?=?MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
188.}elseif("video".equals(type))?{
189.contentUri?=?MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
190.}elseif("audio".equals(type))?{
191.contentUri?=?MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
192.}
193.
194.finalString?selection?="_id=?";
195.finalString[]?selectionArgs?=newString[]?{
196.split[1]
197.};
198.
199.returngetDataColumn(context,?contentUri,?selection,?selectionArgs);
200.}
201.}
202.//?MediaStore?(and?general)
203.elseif("content".equalsIgnoreCase(uri.getScheme()))?{
204.//?Return?the?remote?address
205.if(isGooglePhotosUri(uri))
206.returnuri.getLastPathSegment();
207.
208.returngetDataColumn(context,?uri,null,null);
209.}
210.//?File
211.elseif("file".equalsIgnoreCase(uri.getScheme()))?{
212.returnuri.getPath();
213.}
214.
215.returnnull;
216.}
217.
218./**
219.*?Get?the?value?of?the?data?column?for?this?Uri.?This?is?useful?for
220.*?MediaStore?Uris,?and?other?file-based?ContentProviders.
221.*
222.*?@param?context?The?context.
223.*?@param?uri?The?Uri?to?query.
224.*?@param?selection?(Optional)?Filter?used?in?the?query.
225.*?@param?selectionArgs?(Optional)?Selection?arguments?used?in?the?query.
226.*?@return?The?value?of?the?_data?column,?which?is?typically?a?file?path.
227.*/
228.publicstaticString?getDataColumn(Context?context,?Uri?uri,?String?selection,
229.String[]?selectionArgs)?{
230.
231.Cursor?cursor?=null;
232.finalString?column?="_data";
233.finalString[]?projection?=?{
234.column
235.};
236.
237.try{
238.cursor?=?context.getContentResolver().query(uri,?projection,?selection,?selectionArgs,
239.null);
240.if(cursor?!=null&&?cursor.moveToFirst())?{
241.finalintindex?=?cursor.getColumnIndexOrThrow(column);
242.returncursor.getString(index);
243.}
244.}finally{
245.if(cursor?!=null)
246.cursor.close();
247.}
248.returnnull;
249.}
250.
251.
252./**
253.*?@param?uri?The?Uri?to?check.
254.*?@return?Whether?the?Uri?authority?is?ExternalStorageProvider.
255.*/
256.publicstaticbooleanisExternalStorageDocument(Uri?uri)?{
257.return"com.android.externalstorage.documents".equals(uri.getAuthority());
258.}
259.
260./**
261.*?@param?uri?The?Uri?to?check.
262.*?@return?Whether?the?Uri?authority?is?DownloadsProvider.
263.*/
264.publicstaticbooleanisDownloadsDocument(Uri?uri)?{
265.return"com.android.providers.downloads.documents".equals(uri.getAuthority());
266.}
267.
268./**
269.*?@param?uri?The?Uri?to?check.
270.*?@return?Whether?the?Uri?authority?is?MediaProvider.
271.*/
272.publicstaticbooleanisMediaDocument(Uri?uri)?{
273.return"com.android.providers.media.documents".equals(uri.getAuthority());
274.}
275.
276./**
277.*?@param?uri?The?Uri?to?check.
278.*?@return?Whether?the?Uri?authority?is?Google?Photos.
279.*/
280.publicstaticbooleanisGooglePhotosUri(Uri?uri)?{
281.return"com.google.android.apps.photos.content".equals(uri.getAuthority());
282.}
最后只需要在需要的地方調用showSettingFaceDialog()就可以了。
如果要獲得剪裁的圖片保存路徑，然后上傳，我這邊是這樣處理的（這里每個人的寫法不一樣）：
但只要獲得filePath就可以根據自己的需求處理了
1.privatevoiduploadFace(){
2.File?file?=newFile(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);
3.String?filePath=file.getAbsolutePath();
4.
5.Log.i("tag","filePath="+filePath);
6.HttpHelper.uploadFileWithConcatUrl(context,HttpHelper.UPDATE_USER_ICON,App.user.getUser_session_key()?,filePath?,newHttpHelper.OnFileUploadListener(){
7.
8.@Override
9.publicvoidonFileUploadSuccess(String?orignUrl,?String?midImgUrl,
10.String?smallImgUrl)?{
11.//?TODO?Auto-generated?method?stub
12.
13.App.user.setHead_icon(orignUrl);
14.
15.saveUser();
16.}
17.
18.});
19.}
