安卓相机意图:如何获得全尺寸照片

我正在使用意图来启动相机：

Intent cameraIntent = new Intent(
    android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
getParent().startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);

以及使用：

Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
photoImage.setImageBitmap(thumbnail);
photoImage.setVisibility(View.VISIBLE);

但它只是一个缩略图，如何获得完整的位图？我知道我可以使用自己的活动并使用：

Camera.PictureCallback()

但是，无论如何可以使用意图来做到这一点吗？

谢谢！

编辑：

我也试过：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    Uri uri = data.getData();
    imageView.setImageURI(uri);
}

它适用于从图库中选择的照片，但对于相机意图，data.getData(( 返回空值。

要获得全尺寸相机图像，您应该将相机指向临时文件中保存图片，例如：

    private URI mImageUri;
    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
    File photo;
    try
    {
        // place where to store camera taken picture
        photo = this.createTemporaryFile("picture", ".jpg");
        photo.delete();
    }
    catch(Exception e)
    {
        Log.v(TAG, "Can't create file to take picture!");
        Toast.makeText(activity, "Please check SD card! Image shot is impossible!", 10000);
        return false;
    }
    mImageUri = Uri.fromFile(photo);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
    //start camera intent
    activity.startActivityForResult(this, intent, MenuShootImage);
private File createTemporaryFile(String part, String ext) throws Exception
{
    File tempDir= Environment.getExternalStorageDirectory();
    tempDir=new File(tempDir.getAbsolutePath()+"/.temp/");
    if(!tempDir.exists())
    {
        tempDir.mkdirs();
    }
    return File.createTempFile(part, ext, tempDir);
}

然后在图像捕获意图完成工作后 - 只需使用以下代码从imageUri中获取图片：

public void grabImage(ImageView imageView)
{
    this.getContentResolver().notifyChange(mImageUri, null);
    ContentResolver cr = this.getContentResolver();
    Bitmap bitmap;
    try
    {
        bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, mImageUri);
        imageView.setImageBitmap(bitmap);
    }
    catch (Exception e)
    {
        Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT).show();
        Log.d(TAG, "Failed to load", e);
    }
}

//called after camera intent finished
@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent)
{
    //MenuShootImage is user defined menu option to shoot image
    if(requestCode==MenuShootImage && resultCode==RESULT_OK) 
    {
       ImageView imageView;
       //... some code to inflate/create/find appropriate ImageView to place grabbed image
       this.grabImage(imageView);
    }
    super.onActivityResult(requestCode, resultCode, intent);
}

附言代码需要针对Android M - FileProvider中应用的新安全限制进行修改：mImageUri必须打包FileProvider

打开相机并将图像保存到某个特定目录中

private String pictureImagePath = "";
private void openBackCamera() {
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = timeStamp + ".jpg";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    pictureImagePath = storageDir.getAbsolutePath() + "/" + imageFileName;
    File file = new File(pictureImagePath);
    Uri outputFileUri = Uri.fromFile(file);
    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);               
    cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
    startActivityForResult(cameraIntent, 1);
}

手柄图像

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 1) {
    File imgFile = new  File(pictureImagePath);
        if(imgFile.exists()){        
       Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
       ImageView myImage = (ImageView) findViewById(R.id.imageviewTest);
       myImage.setImageBitmap(myBitmap);
        }
    }
}

尽管这是一个古老的问题，并且有一个公认的答案，
我想分享我的解决方案。
在这种情况下，您不必创建临时文件。
此外，我们还创建了一个选择器，为用户提供两种选择器：用相机拍照或从图库中选择现有照片。

    Intent galleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    Intent chooser = new Intent(Intent.ACTION_CHOOSER);
    chooser.putExtra(Intent.EXTRA_INTENT, galleryIntent);
    chooser.putExtra(Intent.EXTRA_TITLE, getString(R.string.chooseaction));
    Intent[] intentArray = {cameraIntent};
    chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
    startActivityForResult(chooser, RESULT_LOAD_IMAGE);

在这里我们检索结果：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    // todo use appropriate resultCode in your case
    if (requestCode == RESULT_LOAD_IMAGE && resultCode == FragmentActivity.RESULT_OK) {
        if (data.getData() != null) {
            // this case will occur in case of picking image from the Gallery,
            // but not when taking picture with a camera
            try {
                Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), data.getData());
                // do whatever you want with the Bitmap ....           
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            // this case will occur when taking a picture with a camera
            Bitmap bitmap = null;
            Cursor cursor = getActivity().getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                    new String[]{MediaStore.Images.Media.DATA, MediaStore.Images.Media.DATE_ADDED,
                            MediaStore.Images.ImageColumns.ORIENTATION}, MediaStore.Images.Media.DATE_ADDED,
                    null, "date_added DESC");
            if (cursor != null && cursor.moveToFirst()) {
                Uri uri = Uri.parse(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));
                String photoPath = uri.toString();
                cursor.close();
                if (photoPath != null) {
                    bitmap = BitmapFactory.decodeFile(photoPath);
                }
            }
            if (bitmap == null) {
                // for safety reasons you can
                // use thumbnail if not retrieved full sized image
                bitmap = (Bitmap) data.getExtras().get("data");
            }
            // do whatever you want with the Bitmap ....
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}

我也使用了 Vicky 的答案，但我不得不将 uri 保存到一个捆绑包中，以避免在方向更改时丢失它。因此，如果您在倾斜设备后没有从您的意图中获得结果，则可能是因为您的 uri 没有在方向更改中幸存下来。

static final int CAMERA_CAPTURE_REQUEST = 1;
static final String ARG_CURRENT_PIC_URI = "CURRENT_PIC_URI";

String pictureImagePath = folderName + "/" + imageFileName;
File file = new File(Environment.getExternalStorageDirectory(), pictureImagePath);
Uri outputFileUri = Uri.fromFile(file);
mCurrentPicUri = outputFileUri.getPath();
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, CAMERA_CAPTURE_REQUEST);

活动结果代码：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (requestCode == CAMERA_CAPTURE_REQUEST && resultCode == Activity.RESULT_OK) 
  {
    File imgFile = new  File(mCurrentPicUri);
    // do something with your image
    // delete uri
    mCurrentPicUri = "";
  }
}

将 URI 保存到捆绑包：

@Override
public void onSaveInstanceState(Bundle outState) {
  super.onSaveInstanceState(outState);
  // save uri to bundle
  outState.putString(ARG_CURRENT_PIC_URI, mCurrentPicUri);
}

在创建过程中从您保存的捆绑包中检索它：

if (bundle.containsKey(ARG_CURRENT_PIC_URI))
  mCurrentPicUri = bundle.getString(ARG_CURRENT_PIC_URI);

好的是时候还钱了。所以你有你的权限维护节

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-feature android:name="android.hardware.camera" android:required="true" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

并且您还拥有提供者元数据

 <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="${applicationId}.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths"></meta-data>
    </provider>

一个遗漏的细节是(android：authorityapplicationId(你需要添加自己的应用包名称。因此，正如我们在manifest上提到的res文件夹下xml文件，并在该文件夹下创建了file_paths;

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

我们已经完成了复制粘贴部分 1。现在，在我们上面的活动中onCreate(savedInstanceState: Bundle?)定义这些美女

    val REQUEST_IMAGE_CAPTURE = 1
    lateinit var currentPhotoPath: String
    var cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)

您可能想查看原始资源，但像往常一样缺少详细信息 Android 开发人员：链接

另一个缺少的细节是packageName + ".fileprovider",小心，如果你有方法，你需要给出自己的包名称。

// org android developers
    private fun dispatchTakePictureIntent() {
        Intent(MediaStore.ACTION_IMAGE_CAPTURE).also { takePictureIntent ->
            // Ensure that there's a camera activity to handle the intent
            takePictureIntent.resolveActivity(packageManager)?.also {
                // Create the File where the photo should go
                val photoFile: File? = try {
                    createImageFile()
                } catch (ex: IOException) {
                    // Error occurred while creating the File
                    ex.message
                    null
                }
                // Continue only if the File was successfully created
                photoFile?.also {
                    val photoURI: Uri = FileProvider.getUriForFile(
                        this,
                        packageName + ".fileprovider",
                        it
                    )
                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI)
                    startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)
                }
            }
        }
    }

createImageFile功能

 // org android developers
    @Throws(IOException::class)
    private fun createImageFile(): File {
        // Create an image file name
        val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss").format(Date())
        val storageDir: File = this!!.getExternalFilesDir(Environment.DIRECTORY_PICTURES)!!
        return File.createTempFile(
            "JPEG_${timeStamp}_", /* prefix */
            ".jpg", /* suffix */
            storageDir /* directory */
        ).apply {
            // Save a file: path for use with ACTION_VIEW intents
            currentPhotoPath = absolutePath
        }
    }

测试。使用 onClick 事件调用 dispatchTakePictureIntent() 方法，确保允许权限

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
  if (resultCode == Activity.RESULT_OK && requestCode == REQUEST_IMAGE_CAPTURE) {
var  mBitmap_org = MediaStore.Images.Media.getBitmap(
                this.getContentResolver(),
                //Uri.parse(currentPhotoPath)
                Uri.fromFile(File(currentPhotoPath))
            );
        //mImg_display?.setImageBitmap(mBitmap_org)
}
    }

不要检查数据，我们将通过imagePath获取它。如果您正在检查Uri.parse(currentPhotoPath)请确保它是Uri.fromFile(File(currentPhotoPath))

现在你有你的位图，有时间花其他小时/几天如何调整解码大小，保存。

还有一种方法可以保存 tokken 图像，如果我需要将 tokken 图像保存在图库中，也许您可以帮助我看看我应该把它放在哪里

  // org android developers
    private fun galleryAddPic() {
        Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE).also { mediaScanIntent ->
            val f = File(currentPhotoPath)
            mediaScanIntent.data = Uri.fromFile(f)
            sendBroadcast(mediaScanIntent)
        }
    }

不要使用 onActivityResult 的数据。我花了很多时间来测试不同的解决方案。相机会保存图片(即使您没有在 AndroidManifest 中设置相机和卡片读取的权限(，但随后onActivityResult返回data == null并且MediaStore返回错误的路径。在这些解决方案中，您只需获得最后的图库图像，而不是您的照片。

private Uri photoUri;
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    ...
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CAMERA_RESULT) {
        if (resultCode == RESULT_OK) {
            if (photoUri != null) {
                image.setImageURI(photoUri);
            }
        }
    }
}
private void showCamera() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (intent.resolveActivity(getContext().getPackageManager()) != null) {
        File file = null;
        try {
            file = createImageFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        photoUri = null;
        if (file != null) {
            photoUri = Uri.fromFile(file);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
            startActivityForResult(intent, CAMERA_REQUEST);
        }
    }
}
private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File storageDir = getContext().getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    // File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    return File.createTempFile(timeStamp, ".jpg", storageDir);
}

API 级别 29

我尝试了接受的答案，但Environment.getExternalStorageDirectory()接受的答案中使用的答案和后续答案中使用的Environment.getExternalStoragePublicDirectory()在 API 级别 29 中都被弃用了。API 级别 29 中弃用了第三个答案中使用的MediaStore.Images.Media.DATA也是如此。以下代码(在 Kotlin 中(将完整图像存储在MediaStore中，如此 stackoverflow 对不同问题的回答所示，并且不依赖于FileProvider：

    var imageUri: Uri? = null
    fun takePhoto(view: View?) {
        val values = ContentValues()
        values.put(MediaStore.MediaColumns.DISPLAY_NAME, "myimage.jpg")
        values.put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg")
        values.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_PICTURES)
        imageUri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
        val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri)
        startActivityForResult(intent, TAKE_PHOTO_REQUEST)
    }

要从相机捕获最大图像尺寸，我希望这些简单的步骤将非常有用

 public static Camera mCamera;
Camera.Parameters parameters = mCamera.getParameters();
  parameters.getSupportedPictureSizes();
List<Camera.Size> supportedSizes = parameters.getSupportedPictureSizes();
  mSizePicture1 = supportedSizes.get(0);
  int cameraSize = supportedSizes.size();
  mSizePicture2 = supportedSizes.get(cameraSize - 1);
    if (mSizePicture1.height < mSizePicture2.height)
       mSizePicture = supportedSizes.get(cameraSize - 1);
    else
       mSizePicture = supportedSizes.get(0);
parameters.setPictureSize(mSizePicture.width, mSizePicture.height);

在这里，每个手机支持的大小是从固定为要捕获的图片大小的最大大小中获取的。

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