获取Android上图片文件的路径

Question

我有一个可以拍照并上传图片的应用程序。上传需要照片的文件路径，但我无法获取它。

这是我的代码：

public void maakfoto (View v) {

    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
    startActivityForResult(cameraIntent, CAMERA_REQUEST);

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  

        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        imageView.setImageBitmap(photo);
        knop.setVisibility(Button.VISIBLE);
        System.out.println(mImageCaptureUri);
    }  
}

请帮助我获取文件路径。

- Rick de Jong

---

希望这能有所帮助：https://dev59.com/sWHVa4cB1Zd3GeqPkCu3 - Maikel

@MaikelR，你能帮我解答这个详细的问题并获得悬赏吗？非常感谢：https://stackoverflow.com/questions/62783444/why-does-multipart-pdf-is-not-able-to-upload-in-api-after-nougat-using-retrofit - Priyanka Singh

Answer 1

在推特上发布需要在请求中发送设备上图像的实际路径。我发现很难获得实际路径，而且经常会获得错误的路径。

为了解决这个问题，一旦你有一个Bitmap，我使用getImageUri()从中获取URI。然后，我使用tempUri Uri实例获取其在设备上的实际路径。

这是生产代码，并经过充分测试。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        imageView.setImageBitmap(photo);
        knop.setVisibility(Button.VISIBLE);


        // CALL THIS METHOD TO GET THE URI FROM THE BITMAP
        Uri tempUri = getImageUri(getApplicationContext(), photo);

        // CALL THIS METHOD TO GET THE ACTUAL PATH
        File finalFile = new File(getRealPathFromURI(tempUri));

        System.out.println(mImageCaptureUri);
    }  
}

public Uri getImageUri(Context inContext, Bitmap inImage) {
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
    String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
    return Uri.parse(path);
}

public String getRealPathFromURI(Uri uri) {
    Cursor cursor = getContentResolver().query(uri, null, null, null, null); 
    cursor.moveToFirst(); 
    int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); 
    return cursor.getString(idx); 
}

- Siddharth Lele

---

我得到了“交付‘结果’失败”的错误信息。 - Rick de Jong

@iceMAN 你救了我的一天 :) - Adrien Cerdan

错误：（81，27）错误：找不到符号方法getImageUri（Context，Bitmap） - Don Larynx

@IceMAN：我发现getData（“data”）只返回图像的缩略图，可以在这里查看：https://dev59.com/YWw15IYBdhLWcg3wtd4g。我能够暂时保存图像，然后稍后获取以解决此问题。无论如何，还是谢谢。 - ElliotM

记得关闭游标。 - Oush

Answer 2

通过以下方式尝试使用mImageCaptureUri.getPath();：

if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  

            //Get your Image Path
            String Path=mImageCaptureUri.getPath();

            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            imageView.setImageBitmap(photo);
            knop.setVisibility(Button.VISIBLE);
            System.out.println(mImageCaptureUri);
        }  

- Bhavesh Patadiya

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当我做这个的时候，应用程序会崩溃。 - Rick de Jong

可能是因为mImageCaptureUri没有在全局范围内定义和初始化。尝试在全局范围内定义它，并在设置拍摄图像的意图时使用putextra传递它。 - Bhavesh Patadiya

Answer 3

使用此函数来获取捕获图像的路径。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  
            Uri mImageCaptureUri = intent.getData();
            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            imageView.setImageBitmap(photo);
            knop.setVisibility(Button.VISIBLE);
            System.out.println(mImageCaptureUri);
           //getImgPath(mImageCaptureUri);// it will return the Capture image path
        }  
    }

public String getImgPath(Uri uri) {
        String[] largeFileProjection = { MediaStore.Images.ImageColumns._ID,
                MediaStore.Images.ImageColumns.DATA };
        String largeFileSort = MediaStore.Images.ImageColumns._ID + " DESC";
        Cursor myCursor = this.managedQuery(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                largeFileProjection, null, null, largeFileSort);
        String largeImagePath = "";
        try {
            myCursor.moveToFirst();
            largeImagePath = myCursor
                    .getString(myCursor
                            .getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA));
        } finally {
            myCursor.close();
        }
        return largeImagePath;
    }

- Amit Gupta

Answer 4

为了拍照，您需要确定一个路径来保存图像，并将其作为意图中的额外参数传递，例如：

private void capture(){
    String directoryPath = Environment.getExternalStorageDirectory() + "/" + IMAGE_DIRECTORY + "/";
    String filePath = directoryPath+Long.toHexString(System.currentTimeMillis())+".jpg";
    File directory = new File(directoryPath);
    if (!directory.exists()) {
        directory.mkdirs();
    }
    this.capturePath = filePath; // you will process the image from this path if the capture goes well
    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra( MediaStore.EXTRA_OUTPUT, Uri.fromFile( new File(filePath) ) );
    startActivityForResult(intent, REQUEST_CAPTURE);                

}

我只是从我之前回答的另一个问题中复制了上面的部分。

然而，需要提醒你的是，在不同设备之间，图像捕获行为存在很多不一致性，你需要注意。

这里有一个问题，我在某些HTC设备上遇到过，它会保存在我传递的位置和它的默认位置，导致设备上出现重复的图像： 在相机意图拍照后删除相册图片

- Emil Davtyan

Answer 5

我是在按钮点击时执行这个操作。

private static final int CAMERA_PIC_REQUEST = 1;

private View.OnClickListener  OpenCamera=new View.OnClickListener() {

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

                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

                NewSelectedImageURL=null;
                //outfile where we are thinking of saving it
                Date date = new Date();
                SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");

                String newPicFile = RecipeName+ df.format(date) + ".png";


                String outPath =Environment.getExternalStorageDirectory() + "/myFolderName/"+ newPicFile ;
                File outFile = new File(outPath);               

                CapturedImageURL=outFile.toString();
                Uri outuri = Uri.fromFile(outFile);
                cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, outuri);            
                startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);  

            }
        };

你可以从变量CapturedImageURL中获取最近捕获图像的URL。

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


    //////////////////////////////////////
    if (requestCode == CAMERA_PIC_REQUEST) {  
        // do something  

         if (resultCode == RESULT_OK) 
         {
             Uri uri = null;

             if (data != null) 
             {
                 uri = data.getData();
             }
             if (uri == null && CapturedImageURL != null) 
             {
                 uri = Uri.fromFile(new File(CapturedImageURL));
             }
             File file = new File(CapturedImageURL);
             if (!file.exists()) {
                file.mkdir();
                sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+Environment.getExternalStorageDirectory())));
            }




         }


    }

- DeltaCap019

Answer 6

如果你将来需要 Kotlin 代码，你可以这样做。

val myUri = getImageUri(applicationContext, myBitmap!!)
val finalFile = File(getRealPathFromURI(myUri))

fun getImageUri(inContext: Context, inImage: Bitmap): Uri {
    val bytes = ByteArrayOutputStream()
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes)
    val path = MediaStore.Images.Media.insertImage(inContext.contentResolver, inImage, "Title", null)
    return Uri.parse(path)
}

fun getRealPathFromURI(uri: Uri): String {
    val cursor = contentResolver.query(uri, null, null, null, null)
    cursor!!.moveToFirst()
    val idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA)
    return cursor.getString(idx)
}

- Emre Tekin

Answer 7

为了获取Android中所有图像的路径，我正在使用以下代码

public void allImages() 
{
    ContentResolver cr = getContentResolver();
    Cursor cursor;
    Uri allimagessuri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
    String selection = MediaStore.Images.Media._ID + " != 0";

    cursor = cr.query(allsongsuri, STAR, selection, null, null);

    if (cursor != null) {
        if (cursor.moveToFirst()) {
            do {

                String fullpath = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Images.Media.DATA));
                Log.i("Image path ", fullpath + "");


            } while (cursor.moveToNext());
        }
        cursor.close();
    }

}

- Amar Singh Ahirwar

Answer 8

首先简单地传递 Intent

Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);

当你在 onActivityResult 上时，会得到图片路径。

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            ImageView imageView = (ImageView) findViewById(R.id.imgView);
            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
        }
    }

- Kamran