除OpenFileChooser之外的任何其他選項

Question

我正在使用和OpenFileChooser它在Android 4.2.2（Jelly Bean）上工作，但不能在Android Lollipop（5.0）版本上工作。是否有任何選項可以支持從4.0到直到新版本。

我使用本教程

http://androidexample.com/Open_File_Chooser_With_Camera_Option_In_Webview_File_Option/index.php?view=article_discription&aid=128&aaid=148

而且有關於該

發行62220提出問題：openFileChooser點擊的是Android 4.4的WebView

我使用的WebView時，不叫其中我打電話的網頁包含文件選擇器/圖像選擇器。

Answer 1

如Issue 62220: openFileChooser not called when is clicked on android 4.4 webview解釋說：

openFileChooser不是公共API。

從API 21（Android 5.0 Lollipop）開始，您應該使用onShowFileChooser。

對於API 19（4.4），您可以通過使用@JavascriptInterface並使用自定義DOM + JavaScript注入腳本來替換<input type="file">元素來解決此問題。請參閱：https://codemumbai.wordpress.com/android-webview-image-upload-solved/

Answer 2

的onCreate前補充一點：

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 
}; 

添加到mWebView.setWebChromeClient(new WebChromeClient() {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; 
      } 

這添加到類：

@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; 
     } 
    } 

} 

最後一件事，加的體現

<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"/> 

應該在棒棒糖和棉花糖