使用Cordova 进行跨平台应用程序的开发
1.创建Cordova项目
$ cordova create hello com.example.hello HelloWorld
2.添加插件
2.1切换到Plugins目录
2.2 添加一下插件
cordova plugin add cordova-plugin-device cordova plugin add cordova-plugin-file cordova plugin add cordova-plugin-file-transfer cordova plugin add https://github.com/pwlin/cordova-plugin-file-opener2
3.修改插件
3.1需要修改Android项目的插件：
3.1.1修改cordova-plugin-file-transfer 下边的 FileTransfer.java 文件 ，引入import android.os.Environment;
/**
* 获取当前目录在sdcard中的路径
* @param rootFolder 根目录
* @param aFolder 当前目录
*/
public String getStorageDirectory(String rootFolder,String aFolder){
String storagePath= Environment.getExternalStorageDirectory().getPath()+"/"+rootFolder+"/"+aFolder;
return storagePath;
}
/**
* 创建目录
* @param fileDirectory 目录名称
*/
public File createDirectory(String fileDirectory){
File sdcardFile=new File(fileDirectory);
if(!sdcardFile.exists()){
sdcardFile.mkdirs();
}
return sdcardFile;
}
/**
* Downloads a file form a given URL and saves it to the specified directory.
*
* @param source URL of the server to receive the file
* @param target Full path of the file on the file system
*/
private void download(final String source, final String target, JSONArray args, CallbackContext callbackContext) throws JSONException {
Log.d(LOG_TAG, "download " + source + " to " + target);
String localPath=this.getStorageDirectory("GaussQGY", "download");
this.createDirectory(localPath);
final CordovaResourceApi resourceApi = webView.getResourceApi();
final boolean trustEveryone = args.optBoolean(2);
final String objectId = args.getString(3);
final JSONObject headers = args.optJSONObject(4);
final Uri sourceUri = resourceApi.remapUri(Uri.parse(source));
final String targetPath = localPath +‘/‘+ target;
Log.e(LOG_TAG, "文件存放路径: " + targetPath);
// Accept a path or a URI for the source.
Uri tmpTarget = Uri.parse(targetPath);
final Uri targetUri = resourceApi.remapUri(
tmpTarget.getScheme() != null ? tmpTarget : Uri.fromFile(new File(targetPath)));
int uriType = CordovaResourceApi.getUriType(sourceUri);
final boolean useHttps = uriType == CordovaResourceApi.URI_TYPE_HTTPS;
final boolean isLocalTransfer = !useHttps && uriType != CordovaResourceApi.URI_TYPE_HTTP;
if (uriType == CordovaResourceApi.URI_TYPE_UNKNOWN) {
JSONObject error = createFileTransferError(INVALID_URL_ERR, source, targetPath, null, 0, null);
Log.e(LOG_TAG, "Unsupported URI: " + sourceUri);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, error));
return;
}
/* This code exists for compatibility between 3.x and 4.x versions of Cordova.
* Previously the CordovaWebView class had a method, getWhitelist, which would
* return a Whitelist object. Since the fixed whitelist is removed in Cordova 4.x,
* the correct call now is to shouldAllowRequest from the plugin manager.
*/
Boolean shouldAllowRequest = null;
if (isLocalTransfer) {
shouldAllowRequest = true;
}
if (shouldAllowRequest == null) {
try {
Method gwl = webView.getClass().getMethod("getWhitelist");
Whitelist whitelist = (Whitelist)gwl.invoke(webView);
shouldAllowRequest = whitelist.isUrlWhiteListed(source);
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
}
}
if (shouldAllowRequest == null) {
try {
Method gpm = webView.getClass().getMethod("getPluginManager");
PluginManager pm = (PluginManager)gpm.invoke(webView);
Method san = pm.getClass().getMethod("shouldAllowRequest", String.class);
shouldAllowRequest = (Boolean)san.invoke(pm, source);
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
}
}
if (!Boolean.TRUE.equals(shouldAllowRequest)) {
Log.w(LOG_TAG, "Source URL is not in white list: ‘" + source + "‘");
JSONObject error = createFileTransferError(CONNECTION_ERR, source, targetPath, null, 401, null);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, error));
return;
}
final RequestContext context = new RequestContext(source, targetPath, callbackContext);
synchronized (activeRequests) {
activeRequests.put(objectId, context);
}
cordova.getThreadPool().execute(new Runnable() {
public void run() {
if (context.aborted) {
return;
}
HttpURLConnection connection = null;
HostnameVerifier oldHostnameVerifier = null;
SSLSocketFactory oldSocketFactory = null;
File file = null;
PluginResult result = null;
TrackingInputStream inputStream = null;
boolean cached = false;
OutputStream outputStream = null;
try {
OpenForReadResult readResult = null;
file = resourceApi.mapUriToFile(targetUri);
context.targetFile = file;
Log.d(LOG_TAG, "Download file:" + sourceUri);
FileProgressResult progress = new FileProgressResult();
if (isLocalTransfer) {
readResult = resourceApi.openForRead(sourceUri);
if (readResult.length != -1) {
progress.setLengthComputable(true);
progress.setTotal(readResult.length);
}
inputStream = new SimpleTrackingInputStream(readResult.inputStream);
} else {
// connect to server
// Open a HTTP connection to the URL based on protocol
connection = resourceApi.createHttpConnection(sourceUri);
if (useHttps && trustEveryone) {
// Setup the HTTPS connection class to trust everyone
HttpsURLConnection https = (HttpsURLConnection)connection;
oldSocketFactory = trustAllHosts(https);
// Save the current hostnameVerifier
oldHostnameVerifier = https.getHostnameVerifier();
// Setup the connection not to verify hostnames
https.setHostnameVerifier(DO_NOT_VERIFY);
}
connection.setRequestMethod("GET");
// TODO: Make OkHttp use this CookieManager by default.
String cookie = getCookies(sourceUri.toString());
if(cookie != null)
{
connection.setRequestProperty("cookie", cookie);
}
// This must be explicitly set for gzip progress tracking to work.
connection.setRequestProperty("Accept-Encoding", "gzip");
// Handle the other headers
if (headers != null) {
addHeadersToRequest(connection, headers);
}
connection.connect();
if (connection.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED) {
cached = true;
connection.disconnect();
Log.d(LOG_TAG, "Resource not modified: " + source);
JSONObject error = createFileTransferError(NOT_MODIFIED_ERR, source, targetPath, connection, null);
result = new PluginResult(PluginResult.Status.ERROR, error);
} else {
if (connection.getContentEncoding() == null || connection.getContentEncoding().equalsIgnoreCase("gzip")) {
// Only trust content-length header if we understand
// the encoding -- identity or gzip
if (connection.getContentLength() != -1) {
progress.setLengthComputable(true);
progress.setTotal(connection.getContentLength());
}
}
inputStream = getInputStream(connection);
}
}
if (!cached) {
try {
synchronized (context) {
if (context.aborted) {
return;
}
context.connection = connection;
}
// write bytes to file
byte[] buffer = new byte[MAX_BUFFER_SIZE];
int bytesRead = 0;
outputStream = resourceApi.openOutputStream(targetUri);
while ((bytesRead = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, bytesRead);
// Send a progress event.
progress.setLoaded(inputStream.getTotalRawBytesRead());
PluginResult progressResult = new PluginResult(PluginResult.Status.OK, progress.toJSONObject());
progressResult.setKeepCallback(true);
context.sendPluginResult(progressResult);
}
} finally {
synchronized (context) {
context.connection = null;
}
safeClose(inputStream);
safeClose(outputStream);
}
Log.d(LOG_TAG, "Saved file: " + targetPath);
// create FileEntry object
Class webViewClass = webView.getClass();
PluginManager pm = null;
try {
Method gpm = webViewClass.getMethod("getPluginManager");
pm = (PluginManager) gpm.invoke(webView);
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
}
if (pm == null) {
try {
Field pmf = webViewClass.getField("pluginManager");
pm = (PluginManager)pmf.get(webView);
} catch (NoSuchFieldException e) {
} catch (IllegalAccessException e) {
}
}
file = resourceApi.mapUriToFile(targetUri);
context.targetFile = file;
FileUtils filePlugin = (FileUtils) pm.getPlugin("File");
if (filePlugin != null) {
JSONObject fileEntry = filePlugin.getEntryForFile(file);
if (fileEntry != null) {
result = new PluginResult(PluginResult.Status.OK, fileEntry);
} else {
JSONObject error = createFileTransferError(CONNECTION_ERR, source, targetPath, connection, null);
Log.e(LOG_TAG, "File plugin cannot represent download path");
result = new PluginResult(PluginResult.Status.IO_EXCEPTION, error);
}
} else {
Log.e(LOG_TAG, "File plugin not found; cannot save downloaded file");
result = new PluginResult(PluginResult.Status.ERROR, "File plugin not found; cannot save downloaded file");
}
}
} catch (FileNotFoundException e) {
JSONObject error = createFileTransferError(FILE_NOT_FOUND_ERR, source, targetPath, connection, e);
Log.e(LOG_TAG, error.toString(), e);
result = new PluginResult(PluginResult.Status.IO_EXCEPTION, error);
} catch (IOException e) {
JSONObject error = createFileTransferError(CONNECTION_ERR, source, targetPath, connection, e);
Log.e(LOG_TAG, error.toString(), e);
result = new PluginResult(PluginResult.Status.IO_EXCEPTION, error);
} catch (JSONException e) {
Log.e(LOG_TAG, e.getMessage(), e);
result = new PluginResult(PluginResult.Status.JSON_EXCEPTION);
} catch (Throwable e) {
JSONObject error = createFileTransferError(CONNECTION_ERR, source, targetPath, connection, e);
Log.e(LOG_TAG, error.toString(), e);
result = new PluginResult(PluginResult.Status.IO_EXCEPTION, error);
} finally {
synchronized (activeRequests) {
activeRequests.remove(objectId);
}
if (connection != null) {
// Revert back to the proper verifier and socket factories
if (trustEveryone && useHttps) {
HttpsURLConnection https = (HttpsURLConnection) connection;
https.setHostnameVerifier(oldHostnameVerifier);
https.setSSLSocketFactory(oldSocketFactory);
}
}
if (result == null) {
result = new PluginResult(PluginResult.Status.ERROR, createFileTransferError(CONNECTION_ERR, source, targetPath, connection, null));
}
// Remove incomplete download.
if (!cached && result.getStatus() != PluginResult.Status.OK.ordinal() && file != null) {
file.delete();
}
context.sendPluginResult(result);
}
}
});
}
3.1.2 修改Android项目下的 cordova-plugin-file-opener2 找到FileOpener2.java ,然后引入 import android.os.Environment;
修改_open方法
private void _open(String fileArg, String contentType, CallbackContext callbackContext) throws JSONException {
String fileName = "";
String filePath = Environment.getExternalStorageDirectory().getPath() + fileArg;
try {
CordovaResourceApi resourceApi = webView.getResourceApi();
Uri fileUri = resourceApi.remapUri(Uri.parse(filePath));
fileName = this.stripFileProtocol(fileUri.toString());
} catch (Exception e) {
fileName = filePath;
}
File file = new File(fileName);
if (file.exists()) {
try {
Uri path = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, contentType);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
/*
* @see
* http://stackoverflow.com/questions/14321376/open-an-activity-from-a-cordovaplugin
*/
cordova.getActivity().startActivity(intent);
//cordova.getActivity().startActivity(Intent.createChooser(intent,"Open File in..."));
callbackContext.success();
} catch (android.content.ActivityNotFoundException e) {
JSONObject errorObj = new JSONObject();
errorObj.put("status", PluginResult.Status.ERROR.ordinal());
errorObj.put("message", "Activity not found: " + e.getMessage());
callbackContext.error(errorObj);
}
} else {
JSONObject errorObj = new JSONObject();
errorObj.put("status", PluginResult.Status.ERROR.ordinal());
errorObj.put("message", "File not found");
callbackContext.error(errorObj);
}
}
3.2 需要修改iOS项目中的Cordova 插件 下的 cordova-plugin-file-opener2
3.2.1 修改FileOpener2.h
定义一个openURL 方法
#import <Cordova/CDV.h>
@interface FileOpener2 : CDVPlugin <UIDocumentInteractionControllerDelegate> {
NSString *localFile;
}
@property(nonatomic, strong) UIDocumentInteractionController *controller;
- (void) open: (CDVInvokedUrlCommand*)command;
- (void) openURL: (CDVInvokedUrlCommand*)command;
@end
3.2.2 修改FileOpener2.m
实现FileOpener2.h中定义的openURL 方法
#import "FileOpener2.h"
#import <Cordova/CDV.h>
#import <QuartzCore/QuartzCore.h>
#import <MobileCoreServices/MobileCoreServices.h>
@implementation FileOpener2
#pragma mask --- 加载其它应用
- (void)openURL:(CDVInvokedUrlCommand *)command
{
NSString *path = command.arguments[0];
NSURL *url= [NSURL URLWithString: path];
[[UIApplication sharedApplication] openURL:url];
}
#pragma mask --- 打开本地文件
- (void) open: (CDVInvokedUrlCommand*)command {
NSString *path = command.arguments[0];
NSString *uti = command.arguments[1];
if (!uti || (NSNull*)uti == [NSNull null]) {
NSArray *dotParts = [path componentsSeparatedByString:@"."];
NSString *fileExt = [dotParts lastObject];
uti = (__bridge NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)fileExt, NULL);
}
CDVViewController* cont = (CDVViewController*)[ super viewController ];
dispatch_async(dispatch_get_main_queue(), ^{
// TODO: test if this is a URI or a path
NSURL *fileURL = [NSURL URLWithString:path];
localFile = fileURL.path;
NSLog(@"looking for file at %@", fileURL);
NSFileManager *fm = [NSFileManager defaultManager];
if(![fm fileExistsAtPath:localFile]) {
NSDictionary *jsonObj = @{@"status" : @"9",
@"message" : @"File does not exist"};
CDVPluginResult *pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR
messageAsDictionary:jsonObj];
[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
return;
}
self.controller = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
self.controller.delegate = self;
self.controller.UTI = uti;
CGRect rect = CGRectMake(0, 0, 1000.0f, 150.0f);
CDVPluginResult* pluginResult = nil;
BOOL wasOpened = [self.controller presentOptionsMenuFromRect:rect inView:cont.view animated:NO];
if(wasOpened) {
pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString: @""];
} else {
NSDictionary *jsonObj = @{@"status" : @"9",
@"message" : @"Could not handle UTI"};
pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR
messageAsDictionary:jsonObj];
}
[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
});
}
@end
时间： 2024-09-29 02:24:05