我正在尝试使用 android 相机，写了这段代码，但运行后我没有得到任何 O/P，即点击按钮后相机没有打开

问题描述

// 这是我写的代码，我在这里使用视图绑定来在视图中显示图像。

  public void getimage(View view) {
    checkStoragePermission();
}

//这里我检查是否授予权限

private void checkStoragePermission() {
    if (ContextCompat.checkSelfPermission(
            MainActivity.this,Manifest.permission.WRITE_EXTERNAL_STORAGE) !=
            PackageManager.PERMISSION_GRANTED) {
        if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
            new AlertDialog.Builder(MainActivity.this)
                    .setTitle("Permission required")
                    .setMessage("Storage Permission is required to save image")
                    .setPositiveButton("ALLOW",new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,int which) {
                            dialog.cancel();
                            ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},MY_PERMISSION__REQUEST_WRITE_EXTERNAL_STORAGE);
                        }
                    }).setNegativeButton("DENIED",new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog,int which) {
                    dialog.cancel();
                }
            }).show();

        } else {
        /*requestPermissionLauncher.launch(
                Manifest.permission.REQUESTED_PERMISSION);*/
            ActivityCompat.requestPermissions(MainActivity.this,MY_PERMISSION__REQUEST_WRITE_EXTERNAL_STORAGE);

        }`} else {
        Toast.makeText(this,"Permission Already Granted",Toast.LENGTH_SHORT)
                .show();
        //capture the image when permission is granted
        openCameraToCaptureImage();
    }
}`

// 如果权限已经被授予，则打开相机

  private void openCameraToCaptureImage() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {

        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,"com.ankit.totality_corp_assignment",photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,photoURI);
            startActivityForResult(takePictureIntent,REQUEST_TAKE_PHOTO);
        }
    }
}

//创建图像文件

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,/* prefix */
            ".jpg",/* suffix */
            storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    currentPhotoPath = image.getAbsolutePath();
    return image;
}

代码处理 onRequestpermissionResiult()

 @Override
public void onRequestPermissionsResult(int requestCode,String[] permissions,int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSION__REQUEST_WRITE_EXTERNAL_STORAGE:
            // If request is cancelled,the result arrays are empty.
            if (grantResults.length > 0 &&
                    grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //permission is granted
                openCameraToCaptureImage();
            } else {
                Toast.makeText(this,"Permission Denied",Toast.LENGTH_SHORT).show();
            }
            return;
    }
    // Other 'case' lines to check for other
    // permissions this app might request.
}

我错过了什么我实际上没有得到。

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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