Question

我正在学习如何拍照并将其路径保存到文件中。

getoutputmediafileuri()但是，当我尝试使用该方法时，我发现它是

无法访问或未定义，我的意思是eclipse用红线强调了这个方法。我不知道

如何解决此错误。

请在下面找到代码

public class SaveCameraImageDemoActivity extends Activity {
/** Called when the activity is first created. */

Button btn01;
private Uri fileURI;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    btn01 = (Button) findViewById(R.id.btn01);
    btn01.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            Intent intenet = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            fileURI = getoutputmediafileuri();
            //intenet.putExtra("output", uri.getPath());
            startActivityForResult(intenet,0);
        }
    });
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

  }
}

Answer 1

android中没有内置方法getoutputmediafileuri()。这是一种自定义方法，用于获取文件URI以将捕获的图像存储在特定目录中。你必须为它定义和放置逻辑。而不是使用此代码，

修改

btn01.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent imageIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); File imagesFolder = new File(Environment.getExternalStorageDirectory(), "MyImages"); imagesFolder.mkdirs(); // <---- File image = new File(imagesFolder, "image_001.jpg"); Uri uriSavedImage = Uri.fromFile(image); imageIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage); startActivityForResult(imageIntent,0); } });

现在，这会将您的相机拍摄的图像存储在带有 image_001.jpg 名称的SD卡的 MyImages 目录中。

Answer 2

这里定义了getoutputmediafileuri（）方法：http://developer.android.com/guide/topics/media/camera.html#saving-media

Answer 3

现在the document添加了代码。只需粘贴Class的末尾即可，对我来说效果很好。代码见下文。

public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;

/** 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()){
            Log.d("MyCameraApp", "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;
}

getoutputmediafileuri方法无法访问？

3 个答案: