Android WebView 支持 文件上传(Html File Upload)
Posted amz520
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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/
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