关于小米手机无法将照片添加到图库解决方法

安卓把照片加载到图库 （Add the Photo to a Gallery）

http://developer.android.com/intl/zh-cn/training/camera/photobasics.html

官方的指导已经说的很明确了，但有几个需要注意的小地方，稍不留神就会犯错

1 官方文档不严谨

在创建文件的最后有这样一句

mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;

这是添加到相册的代码

private void galleryAddPic() {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);//这一句有错误
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}

因为先前已经增加了file:”，所以再一次解析uri就会有问题，应当Uri.fromfile时候直接传入保存的图片就行

2 小米手机无法添加到相册

注意在创建文件的时候的这一句

File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);

小米手机会发现在sd卡下找不到Picture这一个文件夹，默认照相机是放在sdcard下DCIM/Camera这一个文件夹，这个文件夹对外是可读可写的，也就是说我们应用通过调用系统相机，可以把图片放在这里

3 全部代码

//点击这个按钮开启系统相机，并且添加到相册
public void photo(View view){
try {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
photoFile = createImageFile();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, 1);
//startActivity(takePictureIntent);

} catch (IOException e) {
e.printStackTrace();
}

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// super.onActivityResult(requestCode, resultCode, data);
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);

Uri contentUri = Uri.fromFile( photoFile );
System.out.println(contentUri.toString());
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}

private File createImageFile() throws IOException {
// Create an image file name
/*
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName,
".jpg",
storageDir
);

*/
String timeStamp = new SimpleDateFormat("HHmmss").format(new Date());
File image = new File(Environment.getExternalStorageDirectory(),"DCIM/Camera/"+timeStamp+".jpg");

// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath =  image.getAbsolutePath();
return image;
}