Camera 文件调用

这个在 developer里 有实例
https://developer.android.com/guide/topics/media/camera.html

但是onactivityresult返回的 intent是空的.
因为使用了.EXTRA_OUTPUT.这个的作用是.当生成图片时 会默认保存已经指定的文件里

下面是调用 camera的方法。可以看到使用了 EXTRA_OUTPUT

private Uri fileUri;/** * 카메라 열기 */public void openCamera(){
    Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name    startActivityForResult(intent,CAMERA_CAPTURE);}

下面是官方给的 生成图片文件的方法

/** Create a file Uri for saving an image or video */private static Uri getOutputMediaFileUri(int type){
    return Uri.fromFile(getOutputMediaFile(type));}

/** Create a File for saving an image or video */private static File getOutputMediaFile(int type){
    // To be safe, you should check that the SDCard is mounted    // using Environment.getExternalStorageState() before doing this.
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES), "MyCameraApp");    // This location works best if you want the created images to be shared    // between applications and persist after your app has been uninstalled.
    // Create the storage directory if it does not exist    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            MakeContent.getInstance().ContentErrorLogger("failed to create directory");            return null;        }
    }

    // Create a media file name    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());    File mediaFile;    if (type == MEDIA_TYPE_IMAGE){
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
                "IMG_"+ timeStamp + ".jpg");    } else if(type == MEDIA_TYPE_VIDEO) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
                "VID_"+ timeStamp + ".mp4");    } else {
        return null;    }

    return mediaFile;}

下面是在 onActivityResult 里返回文件。这里需要注意的是 有的机型 返回Intent为空.

所以直接拿过来 fileUri 即可

if (requestCode == CAMERA_CAPTURE) {
    if (resultCode == RESULT_OK) {
        // Image captured and saved to fileUri specified in the Intent        gallaryFilePath( fileUri.toString().replaceFirst("file://",""));    } else if (resultCode == RESULT_CANCELED) {
        // User cancelled the image capture    } else {
        // Image capture failed, advise user    }
}