Android 文件选择器未从 Lollipop 或 Marshmallow 中的 WebView 打开
Android file chooser is not opening from WebView in Lollipop nor Marshmallow
我正在开发一个应用程序,它使用 WebView
来访问一些逻辑。逻辑中有一部分用户可以上传图片,但是,我似乎找不到应用程序这样做的方法。
我用作示例的代码在 link.
中
如您所见,从 WebChromeClient
设置了自定义 Intent
,但是,文件选择器根本打不开。代码:
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// 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);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
提前致谢!
编辑
所以,在@JoxTraex 启发我之后,我意识到文件选择器没有触发,因为我没有覆盖 WebChromeClient
的任何方法。现在,文件选择器正在提示,但是,如果 select 图片,则图片不会上传。
我用于文件选择器的代码:
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
openFileChooser(filePathCallback, "");
return super.onShowFileChooser(webView, filePathCallback, fileChooserParams);
}
public void openFileChooser(ValueCallback<Uri[]> uploadMsg, String acceptType){
// Update message
//mUploadMessage = uploadMsg.this;
try{
// 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);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
提前致谢!
好吧,在与一些听众斗争之后,我找到了解决我的情况的代码。不过,感谢@JoxTraex 和 this dude.
接受的答案是正确的,但如果对任何人有帮助,我会 post 我的代码。我使用了下面的代码,它是在webChrome里面添加的 class.
public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> uploadMsg, WebChromeClient.FileChooserParams fileChooserParams) {
mFilePathCallback = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
return true;
}
并使用onActivityResult中的代码
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (requestCode != FILECHOOSER_RESULTCODE || mFilePathCallback == null) {
super.onActivityResult(requestCode, resultCode, intent);
return;
}
Uri[] results = null;
// Check that the response is a good one
if (resultCode == Activity.RESULT_OK) {
String dataString = intent.getDataString();
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
}
}
mFilePathCallback.onReceiveValue(results);
mFilePathCallback = null;
}
您还需要 Marshmallow 及更高版本的运行时权限。此代码在 Lollipop 中可以正常工作。您还必须为其他 android 版本添加条件才能使其适用于其他版本
我正在开发一个应用程序,它使用 WebView
来访问一些逻辑。逻辑中有一部分用户可以上传图片,但是,我似乎找不到应用程序这样做的方法。
我用作示例的代码在 link.
如您所见,从 WebChromeClient
设置了自定义 Intent
,但是,文件选择器根本打不开。代码:
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// 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);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
提前致谢!
编辑
所以,在@JoxTraex 启发我之后,我意识到文件选择器没有触发,因为我没有覆盖 WebChromeClient
的任何方法。现在,文件选择器正在提示,但是,如果 select 图片,则图片不会上传。
我用于文件选择器的代码:
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
openFileChooser(filePathCallback, "");
return super.onShowFileChooser(webView, filePathCallback, fileChooserParams);
}
public void openFileChooser(ValueCallback<Uri[]> uploadMsg, String acceptType){
// Update message
//mUploadMessage = uploadMsg.this;
try{
// 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);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
提前致谢!
好吧,在与一些听众斗争之后,我找到了解决我的情况的代码。不过,感谢@JoxTraex 和 this dude.
接受的答案是正确的,但如果对任何人有帮助,我会 post 我的代码。我使用了下面的代码,它是在webChrome里面添加的 class.
public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> uploadMsg, WebChromeClient.FileChooserParams fileChooserParams) {
mFilePathCallback = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
return true;
}
并使用onActivityResult中的代码
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (requestCode != FILECHOOSER_RESULTCODE || mFilePathCallback == null) {
super.onActivityResult(requestCode, resultCode, intent);
return;
}
Uri[] results = null;
// Check that the response is a good one
if (resultCode == Activity.RESULT_OK) {
String dataString = intent.getDataString();
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
}
}
mFilePathCallback.onReceiveValue(results);
mFilePathCallback = null;
}
您还需要 Marshmallow 及更高版本的运行时权限。此代码在 Lollipop 中可以正常工作。您还必须为其他 android 版本添加条件才能使其适用于其他版本