Android Webview accessing the camera and gallery

Specify run time permissions for camera and external storage (write,read) and also in manifest

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Here sample webview class code

package org.indywidualni.myapplication;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.ProgressBar;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;

public class MainActivity extends ActionBarActivity {

    private WebView webView;
    private ProgressBar progressBar;

    // variables for camera and choosing files methods
    private static final int FILECHOOSER_RESULTCODE = 1;
    private ValueCallback<Uri> mUploadMessage;
    private Uri mCapturedImageURI = null;

    // the same for Android 5.0 methods only
    private ValueCallback<Uri[]> mFilePathCallback;
    private String mCameraPhotoPath;

    // error handling
    private static final String TAG = MainActivity.class.getSimpleName();

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

        // define url that will open in webView
        String webViewUrl = "http://m.facebook.com";

        // webView code without handling external links
        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setJavaScriptEnabled(true);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);

        //webView.getSettings().setUseWideViewPort(true);
        //webView.getSettings().setLoadWithOverviewMode(true);
        webView.getSettings().setAllowFileAccess(true);

        // load url in webView
        webView.loadUrl(webViewUrl);
        webView.setWebViewClient(new MyAppWebViewClient());

        // implement WebChromeClient inner class
        // we will define openFileChooser for select file from camera
        webView.setWebChromeClient(new WebChromeClient() {

            // page loading progress, gone when fully loaded
            public void onProgressChanged(WebView view, int progress) {
                if (progress < 100 && progressBar.getVisibility() == ProgressBar.GONE) {
                    progressBar.setVisibility(ProgressBar.VISIBLE);
                }
                progressBar.setProgress(progress);
                if (progress == 100) {
                    progressBar.setVisibility(ProgressBar.GONE);
                }
            }

            // for Lollipop, all in one
            public boolean onShowFileChooser(
                    WebView webView, ValueCallback<Uri[]> filePathCallback,
                    WebChromeClient.FileChooserParams fileChooserParams) {
                if (mFilePathCallback != null) {
                    mFilePathCallback.onReceiveValue(null);
                }
                mFilePathCallback = filePathCallback;

                Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                if (takePictureIntent.resolveActivity(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, getString(R.string.image_chooser));
                chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);

                startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);

                return true;
            }

            // creating image files (Lollipop only)
            private File createImageFile() throws IOException {

                File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "DirectoryNameHere");

                if (!imageStorageDir.exists()) {
                    imageStorageDir.mkdirs();
                }

                // create an image file name
                imageStorageDir  = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
                return imageStorageDir;
            }

            // openFileChooser for Android 3.0+
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
                mUploadMessage = uploadMsg;

                try {
                    File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "DirectoryNameHere");

                    if (!imageStorageDir.exists()) {
                        imageStorageDir.mkdirs();
                    }

                    File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");

                    mCapturedImageURI = Uri.fromFile(file); // save to the private variable

                    final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                    captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
                    // captureIntent.putExtra(MediaStore.EXTRA_SCREEN_ORIENTATION, ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

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

                    Intent chooserIntent = Intent.createChooser(i, getString(R.string.image_chooser));
                    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{captureIntent});

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

            }

            // openFileChooser for Android < 3.0
            public void openFileChooser(ValueCallback<Uri> uploadMsg) {
                openFileChooser(uploadMsg, "");
            }

            // openFileChooser for other Android versions
            /* may not work on KitKat due to lack of implementation of openFileChooser() or onShowFileChooser()
               https://code.google.com/p/android/issues/detail?id=62220
               however newer versions of KitKat fixed it on some devices */
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
                openFileChooser(uploadMsg, acceptType);
            }

        });

    }

    // return here when file selected from camera or from SD Card
    @Override
    public void onActivityResult (int requestCode, int resultCode, Intent data) {

        // code for all versions except of Lollipop
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {

            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 = data == null ? mCapturedImageURI : data.getData();
                    }
                }
                catch(Exception e) {
                    Toast.makeText(getApplicationContext(), "activity :"+e, Toast.LENGTH_LONG).show();
                }

                mUploadMessage.onReceiveValue(result);
                mUploadMessage = null;
            }

        } // end of code for all versions except of Lollipop

        // start of code for Lollipop only
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            if (requestCode != FILECHOOSER_RESULTCODE || 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 || data.getData() == 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;

        } // end of code for Lollipop only

    }

    // handling back button
    @Override
    public void onBackPressed() {
        if(webView.canGoBack()) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }
    }

}

onShowFileChooser() webchrome client override method used to access the files .