Question

我正在拍摄如下照片：

activity.startActivityForResult(new Intent(MediaStore.ACTION_IMAGE_CAPTURE), BaseDef.REQUEST_CODE_CAMERA);

之后，我只想获得新的图像路径，uri或类似的（不是位图或图像数据），以便我知道新图像的位置。因此，我尝试检索uri如下：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
    if (requestCode == BaseDef.REQUEST_CODE_CAMERA)
    {
        if (resultCode == RESULT_OK)
        {
            Uri uri = data.getData();
        }
    }
}

但uri有时候是null。如何在这些设备上获取图像路径/ uri？

修改

我真的想保留使用相机应用程序创建的默认文件名！

目前的解决方法（我不知道这是否一直有效）：

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
    if (requestCode == BaseDef.REQUEST_CODE_CAMERA)
    {
        if (resultCode == RESULT_OK)
        {
            String path = null;
            Uri uri = data.getData();
            if (uri != null)
                path = MediaUtil.getRealPathFromURI(uri);
            else
            {
                L.d(this, "URI == NULL => trying to get last image path directly");
                // here I just sort mediastore by id desc and get the first image's path
                // can I be sure this ALWAYS works? 
                // When the camera returns, the image SHOULD be already in the media store
                // If not, I would get a wrong image...
                path = MediaStoreUtil.getLastImagePath(); 
            }

            if (path == null)
            {
                L.d(this, "Path of camera image could not be retrieved");
                return;
            }
        }
    }
}

Answer 1

注意：对于api-24或更高版本，see here。

定位api-23或更低版本

执行此操作的最佳方法是使用用于打开相机的Intent发送Uri。您需要创建一个临时文件，该文件将被拍摄的照片覆盖。

首先，声明一个成员变量来存储Uri：

url http://192.168.3.42:8004/glue/BladeCommandService
electric.util.WrappedException: java.rmi.ConnectException: url = http://169.254.245.248:8004/glue/BladeCommandService
    at electric.proxy.handler.Proxy.getCompatibleException(Unknown Source)
    at electric.proxy.handler.Proxy.invoke(Unknown Source)
    at $Proxy12.executeCommandOnBlade(Unknown Source)
    at com.clearcube.glue.GBladeCommandService.executeCommandOnBlade(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)

设置临时文件并将Uri传递给相机应用程序：

public class MyPhotoActivity extends AppCompatActivity {

    Uri uri;
    //.............

然后，如果在onActivityResult（）中获得成功结果，则创建的临时文件具有捕获的图像，您可以将public void takePhoto() { counter++; //this is an int String imageFileName = "JPEG_" + counter; //make a better file name File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); File image = File.createTempFile(imageFileName, ".jpg", storageDir ); uri = Uri.fromFile(image); Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri); startActivityForResult(takePhotoIntent, BaseDef.REQUEST_CODE_CAMERA); }用于所需的任何内容：

uri

ACTION_IMAGE_CAPTURE - 在默认位置拍照后获取URI

1 个答案: