Camera源码解析

 //存储路径uri的获得
 1 Intent intent = getIntent();
 2         Bundle myExtras = intent.getExtras();
 3 
 4         long requestedSizeLimit = 0;
 5         if (mIsVideoCaptureIntent && myExtras != null) {
 6             Uri saveUri = (Uri) myExtras.getParcelable(MediaStore.EXTRA_OUTPUT);
 7             Log.e(TAG, saveUri.toString());
 8             if (saveUri != null) {
 9                 try {
10                     mCameraVideoFileDescriptor = mContentResolver
11                             .openFileDescriptor(saveUri, "rw")
12                             .getFileDescriptor();
13 
14                     Log.e(TAG, mCameraVideoFileDescriptor.toString());
15                     mCurrentVideoUri = saveUri;
16                 } catch (java.io.FileNotFoundException ex) {
17                     // invalid uri
18                     Log.e(TAG, ex.toString());
19                 }
20             }
21             requestedSizeLimit = myExtras.getLong(MediaStore.EXTRA_SIZE_LIMIT);
22         }
23         mMediaRecorder = new MediaRecorder();
24 
25         mMediaRecorder.setCamera(mCameraDevice);
26         mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
27         mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
28         mMediaRecorder.setProfile(mProfile);
29         mMediaRecorder.setMaxDuration(mMaxVideoDurationInMs);
30 
31         // Set output file.
32         if (mStorageStatus != STORAGE_STATUS_OK) {
33             Log.e(TAG, "1");
34             mMediaRecorder.setOutputFile("/dev/null");
35         } else {
36             // Try Uri in the intent first. If it doesn't exist, use our own
37             // instead.
38             Log.e(TAG, "2");
39             if (mCameraVideoFileDescriptor != null) {
40                 Log.e(TAG, "3");
41                 mMediaRecorder.setOutputFile(mCameraVideoFileDescriptor);
42             } else {
43                 createVideoPath();
44                 Log.e(TAG, "4");
45                 mMediaRecorder.setOutputFile(mCameraVideoFilename);
46             }
47         }

android系统相机源码下载地址：https://files.cnblogs.com/qinghuaideren/Camera.rar