背景：有个html页面，用html里面自带的<input type =file/>上传文件(图片，word，Excel等)浏览器直接打开可以上传，套壳在Android app里面，点击文件上传没反应，修改Android代码，可以实现相应功能，亲测有效。1、在oncreate 方法上面 加入以下代码：
1 private static final int REQUEST_STORAGE = 1; 2 private static final int REQUEST_LOCATION = 2; 3 public ValueCallback<Uri> mUploadMessage; 4 public static final int FILECHOOSER_RESULTCODE = 5173;
2、添加以下方法：
1 webView.setWebChromeClient(new WebChromeClient() {
2
3 // For Android 3.0+
4 public void openFileChooser(ValueCallback<Uri> uploadMsg) {
5
6 mUploadMessage = uploadMsg;
7 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
8 i.addCategory(Intent.CATEGORY_OPENABLE);
9 i.setType("image/*");
10 MainActivity.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FILECHOOSER_RESULTCODE);
11
12 }
13
14 // For Android 3.0+
15 public void openFileChooser( ValueCallback uploadMsg, String acceptType ) {
16 mUploadMessage = uploadMsg;
17 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
18 i.addCategory(Intent.CATEGORY_OPENABLE);
19 i.setType("*/*");
20 MainActivity.this.startActivityForResult(
21 Intent.createChooser(i, "File Browser"),
22 FILECHOOSER_RESULTCODE);
23 }
24
25 //For Android 4.1
26 public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
27 mUploadMessage = uploadMsg;
28 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
29 i.addCategory(Intent.CATEGORY_OPENABLE);
30 i.setType("image/*");
31 MainActivity.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ), MainActivity.FILECHOOSER_RESULTCODE );
32 }
33
34 public boolean onShowFileChooser(
35 WebView webView, ValueCallback<Uri[]> filePathCallback,
36 FileChooserParams fileChooserParams) {
37 if (mUMA != null) {
38 mUMA.onReceiveValue(null);
39 }
40 mUMA = filePathCallback;
41 Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
42 if (takePictureIntent.resolveActivity(MainActivity .this.getPackageManager()) != null) {
43 File photoFile = null;
44 try {
45 photoFile = createImageFile();
46 takePictureIntent.putExtra("PhotoPath", mCM);
47 } catch (IOException ex) {
48 //Log.e(TAG, "Image file creation failed", ex);
49 }
50 if (photoFile != null) {
51 mCM = "file:" + photoFile.getAbsolutePath();
52 takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
53 } else {
54 takePictureIntent = null;
55 }
56 }
57
58 Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
59 contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
60 contentSelectionIntent.setType("*/*");
61 Intent[] intentArray;
62 if (takePictureIntent != null) {
63 intentArray = new Intent[]{takePictureIntent};
64 } else {
65 intentArray = new Intent[0];
66 }
67 Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
68 chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
69 chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
70 chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
71 startActivityForResult(chooserIntent, FCR);
72 return true;
73 }
74 });
3、添加方法：
1 // Create an image file
2 private File createImageFile() throws IOException {
3 @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new java.util.Date());
4 String imageFileName = "img_" + timeStamp + "_";
5 File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
6 return File.createTempFile(imageFileName, ".jpg", storageDir);
7 }
4、onActivityResult
1 @Override
2 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
3 // TODO Auto-generated method stub
4 super.onActivityResult(requestCode, resultCode, data);
5
6 if(requestCode==FILECHOOSER_RESULTCODE) {
7 if (null == mUploadMessage) return;
8 Uri result = data == null || resultCode != RESULT_OK ? null
9 : data.getData();
10 mUploadMessage.onReceiveValue(result);
11 mUploadMessage = null;
12 }
13
14 if (Build.VERSION.SDK_INT >= 21) {
15 Uri[] results = null;
16 //Check if response is positive
17 if (resultCode == Activity.RESULT_OK) {
18 if (requestCode == FCR) {
19 if (null == mUMA) {
20 return;
21 }
22 if (data == null) {
23 //Capture Photo if no image available
24 if (mCM != null) {
25 results = new Uri[]{Uri.parse(mCM)};
26 }
27 } else {
28 String dataString = data.getDataString();
29 if (dataString != null) {
30 results = new Uri[]{Uri.parse(dataString)};
31 }
32 }
33 mUMA.onReceiveValue(results);
34 mUMA = null;
35 }
36 }
37 } else {
38 if (requestCode == FCR) {
39 if (null == mUM) return;
40 Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
41 mUM.onReceiveValue(result);
42 mUM = null;
43 }
44 }
45 }
参考：https://www.zidsworld.com/android-development/make-android-webview-support-file-upload/