Android开发照相功能实例详解

private void dispatchTakePictureIntent(int actionCode) { 
  Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
  startActivityForResult(takePictureIntent, actionCode); 
} 

 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    switch (requestCode) { 
    Bundle extras = intent.getExtras(); 
    Bitmap mImageBitmap = (Bitmap) extras.get("data"); 
    mImageView.setImageBitmap(mImageBitmap); 

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
File f = null; 
       
      try { 
        f = setUpPhotoFile();  
        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f)); 
      } catch (IOException e) { 
        e.printStackTrace(); 
        f = null; 
      } 

private File createImageFile() throws IOException { 
    // Create an image file name 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    String imageFileName = "IMG_"+ timeStamp + "_"; 
    File albumF = getAlbumDir(); 
    File imageF = File.createTempFile(imageFileName, "jpg", albumF); 
    return imageF; 
  } 
 
 
  private File setUpPhotoFile() throws IOException { 
     
    File f = createImageFile(); 
    mCurrentPhotoPath = f.getAbsolutePath(); 
     
    return f; 
  } 
private File getAlbumDir() { 
    File storageDir = null; 
 
 
    if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 
       
      storageDir = mAlbumStorageDirFactory.getAlbumStorageDir(getAlbumName()); 
 
 
      if (storageDir != null) { 
        if (! storageDir.mkdirs()) { 
          if (! storageDir.exists()){ 
            Log.d("CameraSample", "failed to create directory"); 
            return null; 
          } 
        } 
      } 
       
    } else { 
      Log.v(getString(R.string.app_name), "External storage is not mounted READ/WRITE."); 
    } 
     
    return storageDir; 
  }