getLatLong始终返回false

问题描述

我正在尝试使用android.media.ExifInterface库从经过地理标记的图像中检索经度和纬度值.但是，尽管图像已进行地理标记，但getLatLong始终返回false.这是我的代码:

I'm trying to retrieve longitude and latitude values from geotagged images using android.media.ExifInterface library. However, getLatLong always returns false although the image is geotagged. This is my code :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button galleryButton = (Button) findViewById(R.id.galleryButton);

    galleryButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           Intent pickPhoto = new Intent(Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(pickPhoto , 1);


        }

    });


}


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

    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

    switch(requestCode) {
        case 0:
            if(resultCode == RESULT_OK){
                Uri selectedImage = imageReturnedIntent.getData();
                ExifInterface exif = new ExInterface(selectedImage.getPath());
                float[] latlong = null;
                bool result = exif.getLatLong(latlong);


            }

            break;

    }
}

如您所见，我正在用返回的URI的路径初始化exif对象，它包含诸如"/external/images/media/2330"之类的路径.当我调用getLatLong时，它总是返回false.我还尝试了此页面中的示例，但仍然不起作用.任何帮助将不胜感激.

As you can see, I'm initializing exif object with the path from returned URI and it contains path like "/external/images/media/2330". When I call getLatLong, it always returns false. I have also tried the example from this page, but still does not work. Any help would be appreciated.

Galaxy S6 EdgeAndroid SDK版本25

Galaxy S6 EdgeAndroid SDK Version 25

推荐答案

getPath()仅适用于具有file方案的Uri.您有一个content方案.另外，您正在使用ExifInterface并存在安全漏洞.

getPath() only works on a Uri with a file scheme. Yours has a content scheme. Plus, you are using the ExifInterface with the security flaws.

将com.android.support:exifinterface:25.3.1库添加到您的dependencies.

下一步，将android.media.ExifInterface导入替换为android.support.media.ExifInterface.

Next, replace your android.media.ExifInterface import with one for android.support.media.ExifInterface.

然后，替换:

ExifInterface exif = new ExInterface(selectedImage.getPath());

具有:

ExifInterface exif = new ExifInterface(getContentResolver().openInputStream(selectedImage));

这篇关于getLatLong始终返回false的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！