的WebView在此应用程序将打开上传按钮的页面。
下面是代码块,允许打开一个对话框,从画廊或相机上传图片。
在我的活动我有:
private WebView wv;
//make HTML upload button work in Webview
private ValueCallback<Uri> mUploadMessage;
private final static int FILECHOOSER_RESULTCODE=1;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == mUploadMessage) return;
Uri result = intent == null || resultCode != RESULT_OK ? null
: intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
在我的onCreate具备以下条件:
wv.setWebChromeClient(new WebChromeClient() {
private Uri imageUri;
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType ) {
File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyApp");
// Create the storage directory if it does not exist
if (! imageStorageDir.exists()){
imageStorageDir.mkdirs();
}
File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
imageUri = Uri.fromFile(file);
final List<Intent> cameraIntents = new ArrayList<Intent>();
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
final PackageManager packageManager = getPackageManager();
final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for(ResolveInfo res : listCam) {
final String packageName = res.activityInfo.packageName;
final Intent i = new Intent(captureIntent);
i.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
i.setPackage(packageName);
i.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
cameraIntents.add(i);
}
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
Intent chooserIntent = Intent.createChooser(i,"Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));
MainActivity.this.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
我能看到点击上传按钮,相机,图片库和文件浏览器选项。
文件浏览器和库按预期工作。 问题是,当我用相机拍照,它不是在显示状态为“未选择的文件”中的“选择文件”选项上传。
在选择摄像机:
服用快照使用Camera:回去检查选项出现。
关于选择复选标记:
文件尚未上传:(在“选择文件”选项
什么期望:
我检查,我有正确的写作许可,因此命名为“MyApp的”生成目录,图像被存储在其中(如果采取通过点击网页上上传按钮后调用摄像头)。
如何以编程方式告诉击中对勾后的应用程序可供选择,相机拍摄的照片(已存储在MyApp的目录)?
我假设onActivityResult
方法实际上是所谓的,但第三个参数Intent intent
为null。 这似乎是Nexus手机的一个bug。
但是你可以输出图像的URI保存到私有变量,并使用它,而不是意图:
private Uri imageUri;
private void showAttachmentDialog(ValueCallback<Uri> uploadMsg) {
this.mUploadMessage = uploadMsg;
File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "TestApp");
if (!imageStorageDir.exists()) {
imageStorageDir.mkdirs();
}
File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
this.imageUri = Uri.fromFile(file); // save to the private variable
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[] { captureIntent });
this.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == this.mUploadMessage) {
return;
}
Uri result;
if (resultCode != RESULT_OK) {
result = null;
} else {
result = intent == null ? this.imageUri : intent.getData(); // retrieve from the private variable if the intent is null
}
this.mUploadMessage.onReceiveValue(result);
this.mUploadMessage = null;
}
}
在此代码我添加imageUri
变量的活性和在这两个方法中使用它。
挣扎了很多之后,我发现,从5.0+设备从厨房和相机拍摄的文件工作的代码
private ValueCallback<Uri> mUploadMessage;
private Uri mCapturedImageURI = null;
private ValueCallback<Uri[]> mFilePathCallback;
private String mCameraPhotoPath;
private static final int INPUT_FILE_REQUEST_CODE = 1;
private static final int FILECHOOSER_RESULTCODE = 1;
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 = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File imageFile = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
return imageFile;
}
这是初始化和设置的WebView
mWebView= (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setPluginState(WebSettings.PluginState.OFF);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setUserAgentString("Android Mozilla/5.0 AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setAllowContentAccess(true);
mWebView.getSettings().supportZoom();
mWebView.loadUrl(Common.adPostUrl);
mWebView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// do your handling codes here, which url is the requested url
// probably you need to open that url rather than redirect:
if ( url.contains(".pdf")){
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "application/pdf");
try{
view.getContext().startActivity(intent);
} catch (ActivityNotFoundException e) {
//user does not have a pdf viewer installed
}
} else {
mWebView.loadUrl(url);
}
return false; // then it is not handled by default action
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Log.e("error",description);
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) { //show progressbar here
super.onPageStarted(view, url, favicon);
}
@Override
public void onPageFinished(WebView view, String url) {
//hide progressbar here
}
});
mWebView.setWebChromeClient(new ChromeClient());
这里是我的ChomeClient()方法
public class ChromeClient extends WebChromeClient {
// For Android 5.0
public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams) {
// Double check that we don't have any existing callbacks
if (mFilePathCallback != null) {
mFilePathCallback.onReceiveValue(null);
}
mFilePathCallback = filePath;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCameraPhotoPath);
} catch (IOException ex) {
// Error occurred while creating the File
Log.e(Common.TAG, "Unable to create Image File", ex);
}
// Continue only if the File was successfully created
if (photoFile != null) {
mCameraPhotoPath = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
} else {
takePictureIntent = null;
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("image/*");
Intent[] intentArray;
if (takePictureIntent != null) {
intentArray = new Intent[]{takePictureIntent};
} else {
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
startActivityForResult(chooserIntent, INPUT_FILE_REQUEST_CODE);
return true;
}
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
// Create AndroidExampleFolder at sdcard
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "AndroidExampleFolder");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + "IMG_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
// openFileChooser for Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
openFileChooser(uploadMsg, "");
}
//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg, acceptType);
}
}
//这里是我的onActivityResult方法来处理从画廊或相机意图数据
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (requestCode != INPUT_FILE_REQUEST_CODE || mFilePathCallback == null) {
super.onActivityResult(requestCode, resultCode, data);
return;
}
Uri[] results = null;
// Check that the response is a good one
if (resultCode == Activity.RESULT_OK) {
if (data == null) {
// If there is not data, then we may have taken a photo
if (mCameraPhotoPath != null) {
results = new Uri[]{Uri.parse(mCameraPhotoPath)};
}
} else {
String dataString = data.getDataString();
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
}
}
}
mFilePathCallback.onReceiveValue(results);
mFilePathCallback = null;
} else if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
if (requestCode != FILECHOOSER_RESULTCODE || mUploadMessage == null) {
super.onActivityResult(requestCode, resultCode, data);
return;
}
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == this.mUploadMessage) {
return;
}
Uri result = null;
try {
if (resultCode != RESULT_OK) {
result = null;
} else {
// retrieve from the private variable if the intent is null
result = data == null ? mCapturedImageURI : data.getData();
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "activity :" + e,
Toast.LENGTH_LONG).show();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
return;
}
这里需要的权限打开相机
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.CAMERA2" /> // for new versions api 21+
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
注:我的代码还包含用于运行3.0+也器件代码,但我从来没有对它们进行测试,上面的代码工作的棒棒糖,棉花糖和牛轧糖模拟器。 还有一件事,如果你看到在将相机的Android系统的图标,这意味着你必须在你的设备来处理相机可用的许多应用程序。
更新6/18:这似乎并不与Android 4.2.1三星Galaxy S2的工作。 这工作得很好上的HTC One X + 4.1.2。 警诫。
我面临着同样的问题。 这里的问题,以及如何我解决它。
问题:
当openFileChooser
被调用时,回叫对象ValueCallback<Uri>
被传递。 这是实际调用回Web视图当我们有一个文件已经准备好了。 我们这个对象保存到mUploadMessage
和使用mUploadMessage.onReceiveValue()
函数onActivityResult
将文件恢复到web视图。 当你选择摄像头,点击图片,将其保存并返回到web视图的活动,我们的活动可能会被回收,这意味着我们实际上失去了回调对象mUploadMessage
。 因此,该文件不能被传递回的WebView上传。
固定:
修复涉及执行一些JavaScript,因此启用的WebView的JavaScript。 基本上,我们会得到另一个回调对象,如果我们输掉了前一个。
我们需要创建一个布尔字段“ mUploadFileOnLoad
”和三个字段。
private int mReturnCode;
private int mResultCode;
private Intent mResultIntent;
private boolean mUploadFileOnLoad = false;
当我们从相机返回到我们的活动中, onActivityResult
会被调用。 如果活动被重建,mUploadMessage为空。 因此,我们将这些参数保存到字段,设置mUploadFileOnLoad
到真实的回报。 else部分是非常重要的。
@Override
protected void onActivityResult(int requestCode,
int resultCode,
Intent intent)
{
//if the callback object has been recycled
if(null==mUploadMessage)
{
//Save the result
mReturnCode = requestCode;
mResultCode = resultCode;
mResultIntent = intent;
//remember to invoke file upload using Javascript
mUploadFileOnLoad = true;
return;
}else
mUploadFileOnLoad = false;
//rest of the code
}
该解决方案的重要组成部分是WebViewClient
和WebChromeClient
new WebChromeClient() {
//Other overloaded functions
//See http://stackoverflow.com/a/15423907/375093 for full explanation
//The undocumented magic method override
//Eclipse will swear at you if you try to put @Override here
// For Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
//If we lost the callback object
if(mUploadFileOnLoad)
{
mUploadMessage = uploadMsg;
//use the saved result objects to invoke onActivityResult
onActivityResult(mReturnCode, mResultCode, mResultIntent);
return;
}
//Rest of the code....
}
和
new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
if(mUploadFileOnLoad)
{
webview.loadUrl("javascript:document.getElementById('my_file').click()");
}
}
在上文中, my_file
是的id <input>
在网页中的元素。
<input type="file" id="my_file">
所以,综上所述,我们所做的事情是-当我们没有一个回调对象,我们挽救其他活动收到,并设置数据mUploadFileOnLoad
为true,等待加载页面。 当页面加载时,我们使用JavaScript调用文件选择,所以我们得到一个回调对象。 既然我们已经有了结果,我们调用onActivityResult
和回报。 现在onActivityResult已经从网页视图的回调。
我很抱歉我的英语水平。
这是解决方案。
第一,你像这样定义文件成员。
public File mTempFile;
您的openFileChooser是确定的。
onActivityResult
方法是非常重要的。
摄像头的应用程序没有返回URL,但ValueCallback必须有网址。
从mTempFile获取URI。
这是工作。
我用这样的。
if ( mTempFile.exists() ) {
mUploadMessage.onReceiveValue(Uri.fromFile(mTempFile));
mUploadMessage = null;
} else {
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
如果mTempFile是存在的,这是所谓的摄像头,从画廊等情况。
确保你没有android:launchMode="singleInstance"
清单文件