本文介绍了如何在sqlite cordova中保存图像路径的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想显示从相机中拍摄的图像或从图库中选择的图像，将图像保存到文件系统中然后将文件图像url成功推送到sqlite数据库，我找不到显示它的方法，我尝试下面的代码，它只插入到目前为止的img路径
I want show the image taken from camera or chosen from gallery , after saving the image in filesystem then pushing the file image url into sqlite database successfully , I can't find a way to display it ,I tried the code below , it only insert the img path so far
var db = null;
angular.module('starter', ['ionic', 'ngCordova'])
.run(function($ionicPlatform, $cordovaSQLite) {
$ionicPlatform.ready(function() {
try {
db = $cordovaSQLite.openDB({
name: "my.db",
location: 'default'
});
$cordovaSQLite.execute(db,"CREATE TABLE IF NOT EXISTS imageTable " + "(id integer primary key, image text)");
} catch (e) {
alert(e);
} finally { }
if (window.cordova && window.cordova.plugins.Keyboard) {
cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
cordova.plugins.Keyboard.disableScroll(true);
}
if (window.StatusBar) {
StatusBar.styleDefault();
}
});
})
.controller('ImageCtrl', function($scope, $rootScope, $state, $stateParams, $cordovaDevice, $cordovaFile, $ionicActionSheet, $cordovaCamera, $cordovaFile, $cordovaDevice, $ionicPopup, $cordovaActionSheet, $cordovaSQLite, $interval) {
var imagesP = [];
//$scope.images = [];
$scope.showAlert = function(title, msg) {
var alertPopup = $ionicPopup.alert({
title: title,
template: msg
});
};
$scope.loadImage = function() {
var options = {
title: 'Select Receipts Image ',
buttonLabels: ['Gallery', 'Take photo', 'File System'],
addCancelButtonWithLabel: 'Cancel',
androidEnableCancelButton: true,
};
$cordovaActionSheet.show(options).then(function(btnIndex) {
var type = null;
if (btnIndex === 1) {
type = Camera.PictureSourceType.PHOTOLIBRARY;
} else if (btnIndex === 2) {
type = Camera.PictureSourceType.CAMERA;
}
if (type !== null) {
$scope.selectPicture(type);
}
});
}
// Take image with the camera or from library and store it inside the app folder
// Image will not be saved to users Library.
$scope.selectPicture = function(sourceType) {
var options = {
quality: 75,
destinationType: Camera.DestinationType.FILE_URI,
sourceType: sourceType,
allowEdit: true,
encodingType: Camera.EncodingType.JPEG,
correctOrientation: true,
targetWidth: 800,
targetHeight: 800,
popoverOptions: CameraPopoverOptions, // for IOS and IPAD
saveToPhotoAlbum: false
};
$cordovaCamera.getPicture(options).then(function(imagePath) {
// Grab the file name of the photo in the temporary directory
var currentName = imagePath.replace(/^.*[\\\/]/, '');
// alert(currentName);
//Create a new name for the photo to avoid duplication
var d = new Date(),
n = d.getTime(),
newFileName = n + ".jpg";
//alert(newFileName);
// If you are trying to load image from the gallery on Android we need special treatment!
if ($cordovaDevice.getPlatform() == 'Android' && sourceType === Camera.PictureSourceType.PHOTOLIBRARY) {
window.FilePath.resolveNativePath(imagePath, function(entry) {
window.resolveLocalFileSystemURL(entry, success, fail);
function fail(e) {
console.error('Error: ', e);
}
function success(fileEntry) {
var namePath = fileEntry.nativeURL.substr(0, fileEntry.nativeURL.lastIndexOf('/') + 1);
// Only copy because of access rights
$cordovaFile.copyFile(namePath, fileEntry.name, cordova.file.dataDirectory, newFileName).then(function(success) {
// $scope.image = newFileName;
var imgPath = cordova.file.dataDirectory + newFileName;
imagesP.push(imgPath);
$scope.add(imagesP);
}, function(error) {
$scope.showAlert('Error', error.exception);
});
// alert( fileEntry.nativeURL);
};
});
} else {
var namePath = imagePath.substr(0, imagePath.lastIndexOf('/') + 1);
// Move the file to permanent storage
$cordovaFile.moveFile(namePath, currentName, cordova.file.dataDirectory, newFileName).then(function(success) {
// $scope.image = newFileName;
//$scope.images.push(newFileName);
var image = cordova.file.dataDirectory + newFileName;
$scope.add(image);
}, function(error) {
$scope.showAlert('Error', error.exception);
});
}
},
function(err) {
// Not always an error, maybe cancel was pressed...
})
};
$scope.add = function(imagesP) {
if (imagesP != null) {
$cordovaSQLite.execute(db, "INSERT INTO imageTable (images) VALUES(?)", [imagesP] );
}
alert("Inserted.");
},
function(e) {
alert(e);
};
$scope.delete = function(id) {
if (id != '') {
$cordovaSQLite.execute(db, DELETE FROM imageTable WHERE id=?", [id]);
}
alert("Deleted.");
$scope.ShowAllData();
},
function(e) {
alert(e);
};
$scope.ShowAllData = function() { /* SELECT COMMAND */
$scope.images = [];
$cordovaSQLite.execute(db,"SELECT images FROM imageTable").then(function(res) {
if (res.rows.length > 0) {
for (var i = 0; i < res.rows.length; i++) {
$scope.images.push({
id: res.rows.item(i).id,
image: res.rows.item(i).images
});
}
}
}, function(error) {
alert(error);
} );
return $scope.images;
}
//$scope.ShowAllData();
//$interval($scope.ShowAllData, 2000,1);
// Returns the local path inside the app for an image
$scope.pathForImage = function() {
return cordova.file.dataDirectory + $scope.ShowAllData();
};
});
HTML
<body ng-app="starter" ng-controller="ImageCtrl">
<ion-pane>
<ion-header-bar class="bar-positive">
<h1 class="title"> Image Upload</h1>
</ion-header-bar>
<ion-content ng-repeat="image in images">
<img ng-src="{{image.image}}" style="width: 100%; height: 100%;">
</ion-content>
<ion-footer-bar class="bar bar-positive">
<div class="button-bar">
<button class="button icon-left ion-camera" ng-click="loadImage()">Take Photo</button>
<button class="button icon-left ion-camera" ng-click="ShowAllData()">show Photo</button>
</div>
</ion-footer-bar>
</ion-pane>
</body>
推荐答案
您可以通过将destinationType设置为Camera来预览图像。 DestinationType.DATA_URL
you can preview your image by setting destinationType to Camera.DestinationType.DATA_URL
var options = {
quality: 75,
destinationType: Camera.DestinationType.DATA_URL,
sourceType: sourceType,
allowEdit: true,
encodingType: Camera.EncodingType.JPEG,
correctOrientation: true,
targetWidth: 800,
targetHeight: 800,
popoverOptions: CameraPopoverOptions, // for IOS and IPAD
saveToPhotoAlbum: false
};
在回调中，使用
喜欢这个
$cordovaCamera.getPicture(options).then(function(imagePath) {
var currentImage = "data:image/jpeg;base64," +imagePath;
});
这篇关于如何在sqlite cordova中保存图像路径的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！