tns-core-modules
Version:
Telerik NativeScript Core Modules
101 lines (100 loc) • 5.84 kB
JavaScript
var REQUEST_IMAGE_CAPTURE = 3453;
exports.takePicture = function (options) {
return new Promise(function (resolve, reject) {
try {
var types = require("utils/types");
var utils = require("utils/utils");
var density = utils.layout.getDisplayDensity();
if (options) {
var reqWidth = options.width ? options.width * density : 0;
var reqHeight = options.height ? options.height * density : reqWidth;
var shouldKeepAspectRatio = types.isNullOrUndefined(options.keepAspectRatio) ? true : options.keepAspectRatio;
}
var takePictureIntent = new android.content.Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
var dateStamp = createDateTimeStamp();
var fileSystem = require("file-system");
var tempPicturePath = fileSystem.path.join(utils.ad.getApplicationContext().getExternalFilesDir(null).getAbsolutePath(), "cameraPicture_" + dateStamp + ".jpg");
var nativeFile = new java.io.File(tempPicturePath);
var tempPictureUri = android.net.Uri.fromFile(nativeFile);
takePictureIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, tempPictureUri);
if (takePictureIntent.resolveActivity(utils.ad.getApplicationContext().getPackageManager()) != null) {
var appModule = require("application");
var previousResult = appModule.android.onActivityResult;
appModule.android.onActivityResult = function (requestCode, resultCode, data) {
appModule.android.onActivityResult = previousResult;
if (requestCode === REQUEST_IMAGE_CAPTURE && resultCode === android.app.Activity.RESULT_OK) {
var options = new android.graphics.BitmapFactory.Options();
options.inJustDecodeBounds = true;
android.graphics.BitmapFactory.decodeFile(tempPicturePath, options);
var sampleSize = calculateInSampleSize(options.outWidth, options.outHeight, reqWidth, reqHeight);
var finalBitmapOptions = new android.graphics.BitmapFactory.Options();
finalBitmapOptions.inSampleSize = sampleSize;
var bitmap = android.graphics.BitmapFactory.decodeFile(tempPicturePath, finalBitmapOptions);
var scaledSizeImage = null;
if (reqHeight > 0 && reqWidth > 0) {
if (shouldKeepAspectRatio) {
var common = require("./camera-common");
var aspectSafeSize = common.getAspectSafeDimensions(bitmap.getWidth(), bitmap.getHeight(), reqWidth, reqHeight);
scaledSizeImage = android.graphics.Bitmap.createScaledBitmap(bitmap, aspectSafeSize.width, aspectSafeSize.height, true);
}
else {
scaledSizeImage = android.graphics.Bitmap.createScaledBitmap(bitmap, reqWidth, reqHeight, true);
}
}
else {
scaledSizeImage = bitmap;
}
var ei = new android.media.ExifInterface(tempPicturePath);
var orientation = ei.getAttributeInt(android.media.ExifInterface.TAG_ORIENTATION, android.media.ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case android.media.ExifInterface.ORIENTATION_ROTATE_90:
scaledSizeImage = rotateBitmap(scaledSizeImage, 90);
break;
case android.media.ExifInterface.ORIENTATION_ROTATE_180:
scaledSizeImage = rotateBitmap(scaledSizeImage, 180);
break;
case android.media.ExifInterface.ORIENTATION_ROTATE_270:
scaledSizeImage = rotateBitmap(scaledSizeImage, 270);
break;
}
var imageSource = require("image-source");
resolve(imageSource.fromNativeSource(scaledSizeImage));
}
};
appModule.android.foregroundActivity.startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
catch (e) {
if (reject) {
reject(e);
}
}
});
};
var calculateInSampleSize = function (imageWidth, imageHeight, reqWidth, reqHeight) {
var sampleSize = 1;
if (imageWidth > reqWidth && imageHeight > reqHeight) {
var halfWidth = imageWidth / 2;
var halfHeight = imageHeight / 2;
while ((halfWidth / sampleSize) > reqWidth && (halfHeight / sampleSize) > reqHeight) {
sampleSize *= 2;
}
}
return sampleSize;
};
var createDateTimeStamp = function () {
var result = "";
var date = new Date();
result = (date.getDate() < 10 ? "0" + date.getDate().toString() : date.getDate().toString()) +
((date.getMonth() + 1) < 10 ? "0" + (date.getMonth() + 1).toString() : (date.getMonth() + 1).toString()) +
date.getFullYear().toString() +
date.getHours().toString() +
date.getMinutes().toString() +
date.getSeconds().toString();
return result;
};
var rotateBitmap = function (source, angle) {
var matrix = new android.graphics.Matrix();
matrix.postRotate(angle);
return android.graphics.Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
};