从webview INPUT字段上传相机照片和filechooser

Question

我的应用程序是基于网络的,我需要从INPUT野外营地上传图片.我有两种情况,因为我不知道另一种方法,根据页面我选择一个或另一个"boolean boolFileChoser"取决于其URL请求:

一个.文件选择器

湾 相机拍照.

我已经处理了文件选择器并且它完美地上传了文件,问题在于相机.一旦我尝试上传相机图片,它就会崩溃.据我所知,因为URI.

a)文件选择器:content:// media/external/images/1234

b)相机拍摄:file:///mnt/sdcard/Pic.jpg

我发现没有办法改变它.

见更新

它现在崩溃,因为尝试上传"content:// media/external/images/1234"时出现nullpointerexception.(仅限相机,不是文件选择器.).此外,如果选择器/摄像机关闭(后退按钮),我将无法再次呼叫它.

案例a)和b)100%工作,这是工作代码,包括我如何知道fileChooser或相机是否被调用:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (resultCode != RESULT_OK) {
    /** fixed code **/
            //To be able to use the filechooser again in case of error
            mUploadMessage.onReceiveValue(null);
    /** fixed code **/
            return;
    }
    if (mUploadMessage==null) {
        Log.d("androidruntime","no mUploadMessage");
        return;
    }
    if (requestCode == FILECHOOSER_RESULTCODE) {
        Uri selectedImage= intent == null || resultCode != RESULT_OK ? null : intent.getData();
        Log.d("androidruntime","url: "+selectedImage.toString());

    }else if (requestCode == CAMERAREQUEST_RESULTCODE) { 
        if(mCapturedImageURI==null){
            Log.d("androidruntime","no mCapturedImageURI");
            return;
        }
      /** fixed code **/
        getContentResolver().notifyChange(mCapturedImageURI, null);
        ContentResolver cr = getContentResolver();
        Uri uriContent= Uri.parse(MediaStore.Images.Media.insertImage(getContentResolver(), photo.getAbsolutePath(), null, null));
        photo = null;
      /** fixed code **/
    }
    mUploadMessage.onReceiveValue(selectedImage);
    mUploadMessage = null;
}


    private static final int FILECHOOSER_RESULTCODE   = 2888;
    private static final int CAMERAREQUEST_RESULTCODE = 1888;
    private ValueCallback<Uri> mUploadMessage;
    private Uri mCapturedImageURI = null;

    protected class AwesomeWebChromeClient extends WebChromeClient{
        // Per Android 3.0+
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){  
           /**updated, out of the IF **/
                            mUploadMessage = uploadMsg;
           /**updated, out of the IF **/
            if(boolFileChooser){ //Take picture from filechooser

                Intent i = new Intent(Intent.ACTION_GET_CONTENT);  
                i.addCategory(Intent.CATEGORY_OPENABLE);  
                i.setType("image/*");  
                MainActivity.this.startActivityForResult( Intent.createChooser( i, "Escoger Archivo" ), MainActivity.FILECHOOSER_RESULTCODE );  

            } else { //Take photo and upload picture
                Intent cameraIntent = new Intent("android.media.action.IMAGE_CAPTURE");
                File photo = new File(Environment.getExternalStorageDirectory(),  "Pic.jpg");
                cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                        Uri.fromFile(photo));
                mCapturedImageURI = Uri.fromFile(photo);
                startActivityForResult(cameraIntent, MainActivity.CAMERA_REQUEST);
            }
        }
        // Per Android < 3.0
        public void openFileChooser(ValueCallback<Uri> uploadMsg){
            openFileChooser(uploadMsg, "");
        }
        //Altre
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
            openFileChooser(uploadMsg, "");
        }



        /** Added code to clarify chooser. **/

        //The webPage has 2 filechoosers and will send a console message informing what action to perform, taking a photo or updating the file
        public boolean onConsoleMessage(ConsoleMessage cm) {        
            onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
            return true;
        }
        public void onConsoleMessage(String message, int lineNumber, String sourceID) {
            Log.d("androidruntime", "Per cònsola: " + cm.message());
            if(message.endsWith("foto")){ boolFileChooser= true; }
            else if(message.endsWith("pujada")){ boolFileChooser= false; }
        }
        /** Added code to clarify chooser. **/



    }

---

更新1

我可以获得"content:// media/external/images/xxx"uri格式,但是当尝试通过"mUploadMessage.onReceiveValue(selectedImage);"上传uri时应用程序仍然崩溃.现在我得到了一个nullpointerexception.

---

更新2

固定和工作.

我只在文件选择器的情况下在局部变量中使用了'ValueCallback uploadMsg',所以当我尝试上传照片文件因为它是空的时候总是抛出异常.一旦我从if-else声明中取出,一切都奏效了.以前的更新是处理文件上载的最简单方法.

我已经添加了'mUploadMessage.onReceiveValue(null);' 如果Camera/filechooser意图被取消(您必须在您的网页中处理它),如果没有,您将无法再次启动INPUT字段(Intent).

---

更新3

在AwesomeChromeClient中添加了部分代码来区分选项,拍照或选择文件..我的这种方式并通过请愿添加,我相信还有很多其他有效的方法可以做到,

该代码现在是100%功能.如果您指明是否需要图片或文件选择器

Answer 1

这是我从WebView输入字段实现相机上传和filechooser的方法:

以下是这个重要主题的代码.删除不相关的代码.

public class MainActivity extends Activity {

private WebView webView;
private String urlStart = "http://www.example.com/mobile/";

//File choser parameters
private static final int FILECHOOSER_RESULTCODE   = 2888;
private ValueCallback<Uri> mUploadMessage;

//Camera parameters
    private Uri mCapturedImageURI = null;

@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    webView = (WebView) findViewById(R.id.webView);

    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setLoadWithOverviewMode(true);

    webView.getSettings().setAllowFileAccess(true);

    webView.loadUrl(urlStart);

    webView.setWebChromeClient(new WebChromeClient() {
        // openFileChooser for Android 3.0+
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) { 

            mUploadMessage = uploadMsg;

            try{
                Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                File externalDataDir = Environment.getExternalStoragePublicDirectory(
                          Environment.DIRECTORY_DCIM);
                File cameraDataDir = new File(externalDataDir.getAbsolutePath() +
                          File.separator + "browser-photos");
                cameraDataDir.mkdirs();
                String mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator +
                          System.currentTimeMillis() + ".jpg";
                mCapturedImageURI = Uri.fromFile(new File(mCameraFilePath));

                cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);

                Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
                i.addCategory(Intent.CATEGORY_OPENABLE);
                i.setType("image/*");

                Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
                chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[] { cameraIntent });

                startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
              }
             catch(Exception e){
                 Toast.makeText(getBaseContext(), "Camera Exception:"+e, Toast.LENGTH_LONG).show();
             }
           }

        // For Android < 3.0
       @SuppressWarnings("unused")
    public void openFileChooser(ValueCallback<Uri> uploadMsg ) {
               openFileChooser(uploadMsg, "");
           }

    // For Android  > 4.1.1
        @SuppressWarnings("unused")
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
               openFileChooser(uploadMsg, acceptType);
           }



           public boolean onConsoleMessage(ConsoleMessage cm) {        
               onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
               return true;
           }
           public void onConsoleMessage(String message, int lineNumber, String sourceID) {
               Log.d("androidruntime", "www.example.com: " + message);
             }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    // TODO Auto-generated method stub
    if(requestCode==FILECHOOSER_RESULTCODE)  
     {  

            if (null == this.mUploadMessage) {
                return;
            }

           Uri result=null;

           try{
                if (resultCode != RESULT_OK) {

                    result = null;

                } else {

                    // retrieve from the private variable if the intent is null
                    result = intent == null ? mCapturedImageURI : intent.getData(); 
                } 
            }
            catch(Exception e)
            {
                Toast.makeText(getApplicationContext(), "activity :"+e, Toast.LENGTH_LONG).show();
            }

            mUploadMessage.onReceiveValue(result);
            mUploadMessage = null;

     }
}

我希望它会对某人有所帮助:)

Answer 2

解决了。在我的问题中，有功能代码，以防有人需要它。

以下是问题的解决方案：

1. 如果我之前打开并取消，则无法打开相机/文件选择器：

   //inside onActivityResult
   if (resultCode != RESULT_OK) {
        mUploadMessage.onReceiveValue(null);
        return;
   }
   

2. 获取“content://media/external/images/xxx”uri格式，通过“mUploadMessage.onReceiveValue(selectedImage);”上传uri，避免出现空指针异常

   //inside OnActivityResult
   getContentResolver().notifyChange(mCapturedImageURI, null);
   ContentResolver cr = getContentResolver();
   Uri uriContent = Uri.parse(android.provider.MediaStore.Images.Media.insertImage(getContentResolver(), photo.getAbsolutePath(), null, null));