android webview file标签点击弹出选择文件或拍照菜单

1. Web page html:

2.android manifest文件

3. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

4. MainActivity.java

... @Override    protected void onActivityResult(int requestCode, int resultCode,                                    Intent intent) {        Log.v(TAG, TAG + " # onActivityResult # requestCode=" + requestCode + " # resultCode=" + resultCode);        if (requestCode == FILECHOOSER_RESULTCODE) {            if (null == mUploadMessage)                return;            Uri result = intent == null || resultCode != Activity.RESULT_OK ? null : intent.getData();            mUploadMessage.onReceiveValue(result);            mUploadMessage = null;        } else if (requestCode == FILECHOOSER_RESULTCODE_FOR_ANDROID_5) {            if (null == mUploadMessageForAndroid5)                return;            Uri result;            if (intent == null || resultCode != Activity.RESULT_OK) {                result = null;            } else {                result = intent.getData();            }            if (result != null) {                Log.v(TAG, TAG + " # result.getPath()=" + result.getPath());                mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});            } else {                mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});            }            mUploadMessageForAndroid5 = null;        } else if (requestCode == REQUEST_GET_THE_THUMBNAIL) {            if (resultCode == Activity.RESULT_OK) {                File file = new File(mCurrentPhotoPath);                Uri localUri = Uri.fromFile(file);                Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);                mActivity.sendBroadcast(localIntent);                Uri result = Uri.fromFile(file);                mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});                mUploadMessageForAndroid5 = null;            } else {                File file = new File(mCurrentPhotoPath);                Log.v(TAG, TAG + " # file=" + file.exists());                if (file.exists()) {                    file.delete();                }            }        }        super.onActivityResult(requestCode, resultCode, intent);       // mWebView.onActivityResult(requestCode, resultCode, intent);    }   private Activity mActivity;    @SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"})    @Override    protected void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Log.d(TAG, "onCreate: ##########################");        mActivity = this;        if(Build.VERSION.SDK_INT >=23 && (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {            ActivityCompat.requestPermissions(MainActivity.this, new String[]                    {                            Manifest.permission.CAMERA,                            Manifest.permission.CAPTURE_VIDEO_OUTPUT,                            Manifest.permission.READ_EXTERNAL_STORAGE,                            Manifest.permission.WRITE_EXTERNAL_STORAGE                    }, 1);        }        mWebView = (WebView) findViewById(R.id.webview);        WebSettings webSettings = mWebView.getSettings();        webSettings.setJavaScriptEnabled(true);        webSettings.setBuiltInZoomControls(true);        webSettings.setAllowFileAccess(true);        webSettings.setAllowFileAccessFromFileURLs(true);        webSettings.setAllowUniversalAccessFromFileURLs(true);        webSettings.setAllowContentAccess(true);        webSettings.setLoadWithOverviewMode(true);        webSettings.setPluginState(WebSettings.PluginState.ON);        mWebView.requestFocusFromTouch();        mWebView.setWebViewClient(new MyWebViewClient());        final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);        mWebView.setWebChromeClient(new WebChromeClient() {            public void onProgressChanged(WebView view, int progress) {                progressBar.setProgress(progress);                if (progress == 100) {                    progressBar.setVisibility(mWebView.GONE);                } else {                    progressBar.setVisibility(mWebView.VISIBLE);                }            }            @Override            public void onPermissionRequest(final PermissionRequest request) {                Log.i("", "|> onPermissionRequest");                MainActivity.this.runOnUiThread(new Runnable(){                    @TargetApi(Build.VERSION_CODES.LOLLIPOP)                    @Override                    public void run() {                        Log.i("", "|> onPermissionRequest run");                        request.grant(request.getResources());                    }// run                });// MainActivity            }// onPermissionRequest            //3.0++            public void openFileChooser(ValueCallback uploadMsg, String acceptType) {                Log.d(TAG, "openFileChooser: 3.0++");                openFileChooserImpl(uploadMsg);            }            //3.0--            public void openFileChooser(ValueCallback uploadMsg) {                Log.d(TAG, "openFileChooser: 3.0--");                openFileChooserImpl(uploadMsg);            }            public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {                Log.d(TAG, "openFileChooser: ");                openFileChooserImpl(uploadMsg);            }            // For Android > 5.0            public boolean onShowFileChooser(WebView webView, ValueCallback uploadMsg, WebChromeClient.FileChooserParams fileChooserParams) {                openFileChooserImplForAndroid5(uploadMsg);                return true;            }            public void onPageFinished(WebView view, String url) { mWebView.loadUrl("javascript:(function() { document.getElementsByTagName('video')[0].play(); })()"); }            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {                handler.proceed(); // Ignore SSL certificate errors            }        });       // mWebView.setListener(this, this);        mWebView.loadUrl("your_app_url");    }    private String[] items = new String[]{"Choose Image","Take Photo"};    private void openFileChooserImpl(ValueCallback uploadMsg) {        Log.d(TAG, "openFileChooserImpl: 1");        mUploadMessage = uploadMsg;        Log.d(TAG, "openFileChooserImpl: 2");        new AlertDialog.Builder(mActivity)                .setItems(items, new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        if (items[which].equals(items[0])) {                            Intent i = new Intent(Intent.ACTION_GET_CONTENT);                            i.addCategory(Intent.CATEGORY_OPENABLE);                            i.setType("image/*");                            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);                        } else if (items[which].equals(items[1])) {                            dispatchTakePictureIntent();                        }                        dialog.dismiss();                    }                })                .setOnCancelListener(new DialogInterface.OnCancelListener() {                    @Override                    public void onCancel(DialogInterface dialog) {                        Log.v(TAG, TAG + " # onCancel");                        mUploadMessage = null;                        dialog.dismiss();                    }})                .show();        Log.d(TAG, "openFileChooserImpl: 3");    }    private void openFileChooserImplForAndroid5(ValueCallback uploadMsg) {        mUploadMessageForAndroid5 = uploadMsg;        Log.d(TAG, "openFileChooserImplForAndroid5: 1");        new AlertDialog.Builder(mActivity)                .setItems(items, new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        if (items[which].equals(items[0])) {                            Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);                            contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);                            contentSelectionIntent.setType("image/*");                            Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);                            chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);                            chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");                            startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5);                        } else if (items[which].equals(items[1])) {                            dispatchTakePictureIntent();                        }                        dialog.dismiss();                    }                })                .setOnCancelListener(new DialogInterface.OnCancelListener() {                    @Override                    public void onCancel(DialogInterface dialog) {                        Log.v(TAG, TAG + " # onCancel");                        //important to return new Uri[]{}, when nothing to do. This can slove input file wrok for once.                        //InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.                        mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});                        mUploadMessageForAndroid5 = null;                        dialog.dismiss();                    }}).show();        Log.d(TAG, "openFileChooserImplForAndroid5: 2");    }    private void dispatchTakePictureIntent() {        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        if (takePictureIntent.resolveActivity(mActivity.getPackageManager()) != null) {//            File file = new File(createImageFile());            Uri imageUri = null;            try {// *** the code may different if target android v24+                imageUri = Uri.fromFile(createImageFile());            } catch (IOException e) {                e.printStackTrace();            }            //temp sd card file            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);            startActivityForResult(takePictureIntent, REQUEST_GET_THE_THUMBNAIL);        }    }    private File createImageFile() throws IOException {        // Create an image file name        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());        String imageFileName = "JPEG_" + timeStamp + "_";        File storageDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/don_test/");        if (!storageDir.exists()) {            storageDir.mkdirs();        }        File image = File.createTempFile(                imageFileName,  /* prefix */                ".jpg",         /* suffix */                storageDir      /* directory */        );        // Save a file: path for use with ACTION_VIEW intents        mCurrentPhotoPath = image.getAbsolutePath();        return image;    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,                                           @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        if (requestCode == 1) {            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                Toast.makeText(MainActivity.this,"permission granted", Toast.LENGTH_SHORT).show();                // perform your action here            } else {                Toast.makeText(MainActivity.this,"permission not granted", Toast.LENGTH_SHORT).show();            }        }    }    private WebView mWebView;    @SuppressLint("NewApi")    @Override    protected void onResume() {        super.onResume();        mWebView.onResume();        // ...    }    @SuppressLint("NewApi")    @Override    protected void onPause() {        mWebView.onPause();        // ...        super.onPause();    }    @Override    protected void onDestroy() {      //  mWebView.onDestroy();        // ...        super.onDestroy();    }    @Override    public void onBackPressed() {      //  if (!mWebView.onBackPressed()) { return; }        // ...        super.onBackPressed();    }...

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