Android Studio将图像保存到新目录中

我的应用程序有3个按钮：识别人脸、多媒体资料和分析。“识别”按钮的作用是拍照。如何将拍摄的照片保存到我的多媒体资料目录中

public class MainMenu extends AppCompatActivity {

    Button btnTakePhoto;
    ImageView imgTakenPhoto;
    private static final int CAM_REQUEST = 1313;

    private static Button button_sbm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_menu);
        OnClickButtonListener();
        btnTakePhoto = (Button) findViewById(R.id.button_recognizeface);
        imgTakenPhoto = (ImageView) findViewById(R.id.imageview1);
        btnTakePhoto.setOnClickListener(new btnTakePhotoClicker());

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == CAM_REQUEST)
        {
            Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
            imgTakenPhoto.setImageBitmap(thumbnail);
        }

    }


    public void OnClickButtonListener() {
        button_sbm = (Button)findViewById(R.id.button_gallery);
        button_sbm.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View V) {
                        Intent intent = new Intent("com.example.syafiq.facerecognition.Gallery");
                        startActivity(intent);
                    }
                }
        );
    }

    class btnTakePhotoClicker implements Button.OnClickListener
    {

        @Override
        public void onClick(View v) {

            Intent cameraintent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraintent, CAM_REQUEST);
        }

    }

---

通过下面的代码，它的工作对我来说很好

private void createDirectoryAndSaveFile(Bitmap imageToSave, String fileName) {

File direct = new File(Environment.getExternalStorageDirectory() + "/DirName");

if (!direct.exists()) {
    File wallpaperDirectory = new File("/sdcard/DirName/");
    wallpaperDirectory.mkdirs();
}

File file = new File(new File("/sdcard/DirName/"), fileName);
if (file.exists()) {
    file.delete();
}
try {
    FileOutputStream out = new FileOutputStream(file);
    imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);
    out.flush();
    out.close();
} catch (Exception e) {
    e.printStackTrace();
}

---

}

您的问题以前已经得到了回答，只需搜索如何将位图转换为文件。非常感谢suzan:D但当我试图保存图片时，我的应用程序不幸停止工作。：/很抱歉，我真的不擅长android编程/检查logcat上是否有任何错误。如果你在那里发现了什么，你可以再问一次问题：）谢谢你，苏珊：D就可以了；）11-22 17:01:41.051 16572-16572/com.example.syafiq.facialrecognition E/﹕ 设备驱动程序API匹配设备驱动程序API版本：29用户空间API版本：29 11-22 17:01:41.051 16572-16572/com.example.syafiq.facialrecognition E/﹕ 马里：版本=Linux-r3p2-01rel3构建日期=2014年7月22日星期二19:59:34