在android中打开摄像头的问题

Question

private void takePhotoFromCamera()
{
    AnimateImageButton();
    boolean result = Utility.checkPermission(MainActivity.this);
    if (result) {
        try {
            _isOpenGallery = false;

            Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
            timeStamp = new SimpleDateFormat("ddMMyyyy_HHmm").format(new Date());
            File file = new File(Environment.getExternalStorageDirectory() + File.separator + timeStamp + "image.jpg");
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
            startActivityForResult(intent, REQUEST_CAMERA);
            System.out.println("Hello >>>>>>>> : " + file.getAbsolutePath());
        }catch (Exception e)
        {

            Log.d("logforcamera",e.getMessage());
        }
    }
}

活动结果代码

ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    File file = new File(Environment.getExternalStorageDirectory() + File.separator + timeStamp + "image.jpg");
    System.out.println("Helllloooo >>>>>>>>>>> : " + file.getAbsolutePath());
    Bitmap bitmap = decodeSampledBitmapFromFile(file.getAbsolutePath(), widthX, heightY);
    System.out.println("Bitmap : " + bitmap);
    if (bitmap != null)
    {
        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
        showSelectedImage(bitmap);
    }

Answer 1

试试看，这不是造成问题的意图，一旦你拍了照片并保存到sd卡，拿回牛轧糖的uri是不同的....

在应用程序上实现FileProvider相当容易。首先，您需要在AndroidManifest.xml中的标记下面添加一个FileProvider标记：AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ...
    <application
        ...
        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
        </provider>
    </application>
</manifest>

然后在res文件夹下的xml文件夹中创建provider_paths.xml文件。如果文件夹不存在，则可能需要创建该文件夹。

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

Uri photoURI = Uri.fromFile(createImageFile());

ri photoURI = FileProvider.getUriForFile(MainActivity.this,
            BuildConfig.APPLICATION_ID + ".provider",
            createImageFile());