我正在使用和 OpenFileChooser，它在 Android 4.2.2（Jelly Bean）上工作，但在 Android Lollipop（5.0）版本上不工作。所以有什么选项可以做这件事，支持从 4.0 到新版本。
我正在使用本教程
并且有关于此的问题提交
问题 62220：在 android 4.4 webview 上单击时未调用 openFileChooser
我正在使用 webview，我在其中调用了包含文件选择器/图像选择器的网页。
user6044738
问问题
1749 次
2 回答
0
如问题 62220：在 android 4.4 webview 上单击时未调用 openFileChooser 中所述：
openFileChooser不是公共 API。
从 API 21（Android 5.0 Lollipop）开始，您应该使用onShowFileChooser.
@JavascriptInterface对于 API 19 (4.4)，您可以通过使用甚至注入脚本来解决它，以使用<input type="file">自定义 DOM+JavaScript 替换元素。见：https ://codemumbai.wordpress.com/android-webview-image-upload-solved/
于 2016-03-30T13:24:05.793 回答
0
在 onCreate 之前添加：
private WebView mWebView;
private ProgressBar mProgressBar;
//new block
private static final String TAG = MainActivity.class.getSimpleName();
public static final int INPUT_FILE_REQUEST_CODE = 1;
public static final String EXTRA_FROM_NOTIFICATION = "EXTRA_FROM_NOTIFICATION";
private ValueCallback<Uri[]> mFilePathCallback;
private String mCameraPhotoPath;
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.CAMERA
};
添加mWebView.setWebChromeClient(new WebChromeClient() {到此：
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback,
WebChromeClient.FileChooserParams fileChooserParams) {
//verifyStoragePermissions(MainActivity.this);
Log.e("111","onShowFileChooser");
if(mFilePathCallback != null) {
mFilePathCallback.onReceiveValue(null);
}
mFilePathCallback = filePathCallback;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(MainActivity.this.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_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;
}
并将其添加到类中：
@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) {
System.out.println("In KitKat Condition");
if (requestCode != FILECHOOSER_RESULTCODE || mUploadMessage == null) {
System.out.println("In != Null");
super.onActivityResult(requestCode, resultCode, data);
return;
}
if (requestCode == FILECHOOSER_RESULTCODE) {
System.out.println("requestCode == FileChooser ResultCode");
if (null == this.mUploadMessage) {
System.out.println("In null == this.mUploadMessage");
return;
}
Uri result = null;
try {
if (resultCode != RESULT_OK) {
result = null;
} else {
//newcode
// retrieve from the private variable if the intent is null
result = data == null ? mCapturedImageURI : data.getData();
KitkatPath = Uri.parse("file://"+getPath(MainActivity.this, result));
System.out.println("KitkatPath== "+KitkatPath);
System.out.println("result = "+result);
}
} catch (Exception e) {
// Toast.makeText(getApplicationContext(), "activity :" + e, Toast.LENGTH_LONG).show();
e.printStackTrace();
}
// mUploadMessage.onReceiveValue(result);
mUploadMessage.onReceiveValue(KitkatPath);
System.out.println("mUploadMessage = "+mUploadMessage);
mUploadMessage = null;
}
}
}
最后一件事，添加到清单
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
它应该适用于棒棒糖和棉花糖
于 2016-10-03T11:54:20.253 回答