像标题说我的问题是关于相机拍摄图像的图像URI。 开放的我们总是空...为什么？

  @覆盖
公共无效的onClick（视图v）{

    意图cameraIntent =新的意图（MediaStore.ACTION_IM​​AGE_CAPTURE）;
    startActivityForResult（cameraIntent，TAKE_PICTURE）;


@覆盖
    保护无效onActivityResult（INT申请code，INT结果code，意图数据）{

        如果（要求code == TAKE_PICTURE）
        {
            //乌里contentURI = Uri.parse（data.getDataString（））;
            。缩略图=（位图）data.getExtras（）获得（数据）;
            ImageView的形象=（ImageView的）findViewById（R.id.photoResultView）;
            image.setImageBitmap（缩略图）;

                photoUri = data.getData（）;
                Log.e（FOTOLOG，+ photoUri）;


        }
    }
 

解决方案

看看这个，

的Andr​​oid ACTION_IM​​AGE_CAPTURE意图

可能会为你提供一些见解。

 公共无效startCamera（）{

    档案照片= NULL;
    意向意图=新的意图（android.media.action.IMAGE_CAPTURE）;
    如果（android.os.Environment.getExternalStorageState（）。等于（
            android.os.Environment.MEDIA_MOUNTED））{
        照片=新的文件（android.os.Environment
                .getExternalStorageDirectory（），FILE_NAME）;
    } 其他 {
        照片=新的文件（getCacheDir（），FILE_NAME）;
    }
    如果（照片！= NULL）{
        intent.putExtra（MediaStore.EXTRA_OUTPUT，Uri.fromFile（照片））;
        selectedImageUri = Uri.fromFile（照片）;
        startActivityForResult（意向，IMAGE_CAPTURE）;
    }
}


公共无效onActivityResult（INT申请code，INT结果code，意图数据）{

     如果（要求code == IMAGE_CAPTURE）{

        如果（结果code == Activity.RESULT_OK）{

            尝试 {
                乌里selectedImage = selectedImageUri;
                //getContentResolver().notifyChange(selectedImage，NULL）;
                ContentResolver的CR = getContentResolver（）;
                点阵位图;
                位= android.provider.MediaStore.Images.Media
                        .getBitmap（CR，selectedImage）;
                rptImage.setImageBitmap（位）;

            }赶上（例外五）{
                Toast.makeText（这一点，无法加载，Toast.LENGTH_SHORT）
                        。显示（）;
                Log.e（相机，e.toString（））;
            }

        } 其他 {
            selectedImageUri = NULL;
            rptImage.setImageBitmap（空）;
        }

    }

}
 

这是从我的应用程序中的code样本。

您所需要的权限，

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;
    ＆LT;使用-权限的Andr​​oid：名称=android.permission.CAMERA/＆GT;
    ＆LT;使用特征的android：NAME =android.hardware.camera/＆GT;
 

like the title says my problem concerns the image uri of images taken by the camera. Uri is always null ... WHY?

@Override
public void onClick(View v) {

    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);          
    startActivityForResult(cameraIntent, TAKE_PICTURE); 


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

        if (requestCode == TAKE_PICTURE)
        {
            //Uri contentURI = Uri.parse(data.getDataString());
            thumbnail = (Bitmap) data.getExtras().get("data");
            ImageView image = (ImageView) findViewById(R.id.photoResultView);  
            image.setImageBitmap(thumbnail);

                photoUri = data.getData();
                Log.e("FOTOLOG",""+ photoUri);


        }
    }

Look at this,

Android ACTION_IMAGE_CAPTURE Intent

might provide you with some insight.

public void startCamera() {

    File photo = null;
    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
    if (android.os.Environment.getExternalStorageState().equals(
            android.os.Environment.MEDIA_MOUNTED)) {
        photo = new File(android.os.Environment
                .getExternalStorageDirectory(), FILE_NAME);
    } else {
        photo = new File(getCacheDir(), FILE_NAME);
    }    
    if (photo != null) {
        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
        selectedImageUri = Uri.fromFile(photo);
        startActivityForResult(intent, IMAGE_CAPTURE);
    }
}


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

     if (requestCode == IMAGE_CAPTURE) {

        if (resultCode == Activity.RESULT_OK) {

            try {
                Uri selectedImage = selectedImageUri;
                //getContentResolver().notifyChange(selectedImage, null);
                ContentResolver cr = getContentResolver();
                Bitmap bitmap;
                bitmap = android.provider.MediaStore.Images.Media
                        .getBitmap(cr, selectedImage);
                rptImage.setImageBitmap(bitmap);

            } catch (Exception e) {
                Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT)
                        .show();
                Log.e("Camera", e.toString());
            }

        } else {
            selectedImageUri = null;
            rptImage.setImageBitmap(null);
        }

    } 

}

That's a code sample from my application.

You need the permission,

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-feature android:name="android.hardware.camera" />