私のアプリでは、webview を使用して、複数のファイルをサーバーにアップロードする必要がある Web ページをレンダリングしています。OnShowFileChooser() (ロリポップおよび上位バージョンの場合) は正常に動作していますが、onOpenFileChooser() (他の下位バージョンの Android の場合) です。Uri 配列 (Uri[]) を onValueCallback() に渡すと、OnshowFileChooser() メソッドが機能しません。classCastException をスローします。以下は、必要な操作を実行するために使用した私のコードです。すべてのAndroidバージョンで機能するwebviewを使用して複数のファイルをアップロードするソリューションが必要です。
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(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_OPEN_DOCUMENT);
contentSelectionIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
contentSelectionIntent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
contentSelectionIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
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 other Android versions
public void openFileChooser(ValueCallback<Uri[]> uploadMsg, String acceptType, String capture) {
openFileChooser(uploadMsg, acceptType);
}
// 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.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
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, "");
}
}
これは onActivityResult コードです
@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 {
if (data.getData() != null) {
String dataString = data.getDataString();
if (dataString != null) {
// results = new Uri[]{Uri.parse(dataString)};
// Will return "image:x*"
String wholeID = DocumentsContract.getDocumentId(Uri.parse(dataString.replace("%3A", ":")));
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String type = wholeID.split(":")[0];
String[] column = {MediaStore.Images.Media.DATA};
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = getContentResolver().
query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{id}, null);
String filePath = "";
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
results = new Uri[]{Uri.parse("file:" + filePath)};
}
cursor.close();
}
} else {
if (data.getClipData() != null) {
ClipData clipData = data.getClipData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
results = new Uri[clipData.getItemCount()];
for (int i = 0; i < clipData.getItemCount(); i++) {
ClipData.Item image = clipData.getItemAt(i);
Uri uri = image.getUri();
// Will return "image:x*"
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String type = wholeID.split(":")[0];
String contentUri;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.DATA;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.DATA;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.DATA;
}
String[] column = {MediaStore.Images.Media.DATA};
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = getContentResolver().
query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{id}, null);
String filePath = "";
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
results[i] = Uri.parse("file:" + filePath);
}
}
}
}
}
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 {
if (data.getData() != null)
result[0] = data.getData();
else {
if (data.getClipData() != null) {
result = new Uri[data.getClipData().getItemCount()];
for (int i = 0; i < data.getClipData().getItemCount(); i++) {
result[i] = data.getClipData().getItemAt(i).getUri();
}
} else {
result = null;
}
}
// 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;
}
