如何从图像路径中获取资源 ID? [英] How to get resource ID from Image Path?

问题描述

我在 android 中有一个图像路径.该图像存在于设备的 sdcard 上.我怎样才能找到它的resourceID?我需要将它发送到 decodeResource 函数.我正在尝试检测用户从图库中选择的图像上的面孔.我写的代码是

I have an imagepath in android .This image exits on the sdcard of the device. How can i find resourceID of it ? I need to send it to decodeResource function. I am trying to detect faces on the image user selects from the gallery. The code that I have written is

    Intent intent = new Intent(this, DetectFaces.class);
    intent.putExtra(PICTURE_PATH,picturePath);//the path of the image
    startActivity(intent);

在detectFaces类中

In detectFaces class

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detect_faces);
       // getActionBar().setDisplayHomeAsUpEnabled(true);
        Intent intent = getIntent();
        ImageView imageView = (ImageView) findViewById(R.id.imgView);
        picturePath = intent.getStringExtra(GetFaceActivity.PICTURE_PATH);
        imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
        //imageView.setOnTouchListener(this);

    } 

有一个按钮，其onClick事件关联

There is a button whose onClick event is associated with

public void DetectFacesInImage(View view)
{
    BitmapFactory.Options bitmapFactoryOptions=new BitmapFactory.Options();
    bitmapFactoryOptions.inPreferredConfig= Bitmap.Config.RGB_565;
myBitmap=BitmapFactory.decodeResource(getResources(),R.drawable.faceswapping,bitmapFactoryOptions);
    int width=myBitmap.getWidth();
    int height=myBitmap.getHeight();
    detectedFaces=new FaceDetector.Face[number_of_faces];
    FaceDetector faceDetector=new FaceDetector(width,height,number_of_faces);
    number_of_faces_detected = faceDetector.findFaces(myBitmap, detectedFaces);

 }

我需要 decodeResource 函数中的 ID.有什么提示吗?

I need ID in the decodeResource function. Any hints ?

推荐答案

试试这个，也许对你有帮助

Try this, it may help you

File fileObj = new  File("/sdcard/Images/test_image.jpg");
if(fileObj .exists()){
    Bitmap bitMapObj= BitmapFactory.decodeFile(fileObj .getAbsolutePath());
    ImageView imgView= (ImageView) findViewById(R.id.imageviewTest);
    imgView.setImageBitmap(bitMapObj);
}

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