Android Webview (default) with Runtime Permissions via k0shk0sh PermissionsHelper

gistfile1.txt

package com.shouttag.mothership;

import android.app.Activity; // Need for constants
import android.content.DialogInterface; // Needed for building out dialog box
import android.content.Intent; // Needed for intent interaction (camera)
import android.graphics.Color; // Needed for alert dialog option coloring
import android.support.annotation.NonNull;
import java.io.File; // Needed for storing image in temp file on device
import java.io.IOException; // Needed for storing image in temp file on device
import java.text.SimpleDateFormat; // Needed for date formatting
import java.util.Arrays;
import java.util.Date; // Needed for date api
import java.util.List;
import android.Manifest; // Needed for manifest permission access
import android.net.Uri; // Needed for onFileChooser
import android.os.Build; // Needed to determine sdk version
import android.os.Bundle; // Needed for onCreate
import android.os.Environment; // Need for external storage dir
import android.provider.MediaStore; // Needed for external storage access
import android.support.v7.app.AppCompatActivity; // Needed for activity extension
import android.support.v7.app.AlertDialog; // Needed for building out dialog box
import android.util.Log; // Needed for logging
import android.view.View; // Needed for hardware accel
import android.webkit.*;

import com.fastaccess.permission.base.PermissionHelper;
import com.fastaccess.permission.base.callback.OnPermissionCallback;

public class ActivityMain extends AppCompatActivity implements OnPermissionCallback
{
    protected static final int REQUEST_CODE_DEFAULT     = 1;
    protected static final int REQUEST_CODE_ANDROID_5   = 2;
    protected static final int REQUEST_CODE_THUMBNAIL   = 3;
    protected static final int REQUEST_CODE_GALLERY     = 4;

    protected static final String LOG_TAG = "!!!!!";

    //protected static final String WEB_VIEW_URL = "https://dev_mpurcell.shouttag.com/test.html";
    protected static final String WEB_VIEW_URL = "https://dev_mpurcell.shouttag.com";

    protected PermissionHelper permissionHelper;

    protected final static String[] PERMISSIONS_CAMERA = new String[] {
        Manifest.permission.CAMERA,
        Manifest.permission.WRITE_EXTERNAL_STORAGE
    };

    protected final static String[] PERMISSIONS_GALLERY = new String[] {
        Manifest.permission.WRITE_EXTERNAL_STORAGE
    };

    /**
     * Container for layout so snackbar knows which layout to render against for permissions
     *
     * @type View
     */
    protected View layoutWebView;

    /**
     * Container for temp file uri
     *
     * @type string
     */
    protected String tempFileUri;

    /**
     * @type WebView
     */
    protected WebView webView;

    /**
     * @type ValueCallback<Uri[]>
     */
    protected ValueCallback<Uri[]> fileUriCallback;

    /**
     * @type WebSettings
     */
    protected WebSettings webViewSettings;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        layoutWebView = findViewById(R.id.webview);

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

        webViewSettings = webView.getSettings();

        webViewSettings.setJavaScriptEnabled(true);
        webViewSettings.setLoadWithOverviewMode(true);
        webViewSettings.setAllowFileAccess(true);

        webView.setWebViewClient(new MyCustom_Api_Client());
        webView.setWebChromeClient(new MyCustom_Api_ChromeClient());

        // If SDK version is greater of 19 then activate hardware acceleration otherwise activate software acceleration
        if (Build.VERSION.SDK_INT >= 19) {

            webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);

        } else if (Build.VERSION.SDK_INT >= 11 && Build.VERSION.SDK_INT < 19) {

            webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        }

        webView.loadUrl(WEB_VIEW_URL);

        permissionHelper = PermissionHelper.getInstance(this);
    }

    public class MyCustom_Api_ChromeClient extends WebChromeClient
    {
        // For Android > 5.0
        @Override
        public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
        {
            renderImageUploadOptions(filePathCallback);

            return true;
        }
    }

    public class MyCustom_Api_Client extends WebViewClient {}

    protected String convertPermToHumanReadable(String permission)
    {
        switch (permission) {

            case Manifest.permission.CAMERA:

                return "camera";

            case Manifest.permission.WRITE_EXTERNAL_STORAGE:

                return "external storage";

            default:

                return null;
        }
    }

    protected 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() + "/!shouttag/");

        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
        tempFileUri = image.getAbsolutePath();

        return image;
    }

    protected void intentCamera()
    {
        // Don't try to do individually, for some reason perms get pre-granted then nothing happens
        permissionHelper
            .setForceAccepting(false)
            .request(PERMISSIONS_CAMERA);

        if ((permissionHelper.isPermissionGranted(Manifest.permission.CAMERA)) &&
            (permissionHelper.isPermissionGranted(Manifest.permission.WRITE_EXTERNAL_STORAGE))) {

            showCamera();
        }
    }

    protected void intentGallery()
    {
        // Don't try to do individually, for some reason perms get pre-granted then nothing happens
        permissionHelper
            .setForceAccepting(false)
            .request(PERMISSIONS_GALLERY);

        if (permissionHelper.isPermissionGranted(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {

            showGallery();
        }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent)
    {
        super.onActivityResult(requestCode, resultCode, intent);

        permissionHelper.onActivityForResult(requestCode);

        switch (requestCode) {

            case REQUEST_CODE_ANDROID_5:

                Uri result;

                if (null == fileUriCallback) {

                    return;
                }

                if (intent == null || resultCode != Activity.RESULT_OK) {

                    result = null;

                } else {

                    result = intent.getData();
                }

                if (result != null) {

                    fileUriCallback.onReceiveValue(new Uri[]{result});

                    fileUriCallback = null;
                }

                break;

            case REQUEST_CODE_THUMBNAIL:

                File file = new File(tempFileUri);

                if (resultCode == Activity.RESULT_OK) {

                    Uri localUri = Uri.fromFile(file);

                    Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);

                    ActivityMain.this.sendBroadcast(localIntent);

                    fileUriCallback.onReceiveValue(new Uri[]{localUri});

                    fileUriCallback = null;

                } else {

                    if (file.exists()) {

                        file.delete();
                    }

                    fileUriCallback.onReceiveValue(new Uri[]{});

                    fileUriCallback = null;
                }

                break;

            case REQUEST_CODE_GALLERY:

                if (resultCode == RESULT_OK) {

                    Uri selectedImageUri = intent.getData();

                    Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, selectedImageUri);

                    ActivityMain.this.sendBroadcast(localIntent);

                    // If we want to downsize check out the post
                    //  http://stackoverflow.com/questions/2507898/how-to-pick-an-image-from-gallery-sd-card-for-my-app

                    fileUriCallback.onReceiveValue(new Uri[]{selectedImageUri});

                    fileUriCallback = null;

                } else {

                    fileUriCallback.onReceiveValue(new Uri[]{});

                    fileUriCallback = null;
                }

                break;
        }
    }

    protected void renderImageUploadOptions(ValueCallback<Uri[]> filePathCallback)
    {
        fileUriCallback = filePathCallback;

        final CharSequence[] items = { "Take Photo", "Choose from Gallery", "Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(ActivityMain.this);

        builder.setTitle("Add Photo!");

        builder.setItems(items, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int item) {

            if (items[item].equals("Take Photo")) {

                intentCamera();

            } else if (items[item].equals("Choose from Gallery")) {

                intentGallery();

            } else if (items[item].equals("Cancel")) {

                fileUriCallback.onReceiveValue(new Uri[]{});

                fileUriCallback = null;

                dialog.dismiss();
            }
            }
        });

        builder.show();
    }

    protected void showCamera()
    {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        if (takePictureIntent.resolveActivity(ActivityMain.this.getPackageManager()) != null) {

            Uri imageUri = null;

            try {

                imageUri = Uri.fromFile(createImageFile());

            } catch (IOException e) {

                e.printStackTrace();
            }

            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

            startActivityForResult(takePictureIntent, REQUEST_CODE_THUMBNAIL);
        }
    }

    protected void showGallery()
    {
        Intent intent = new Intent();

        intent.setType("image/*");
        intent.setAction(Intent.ACTION_PICK);

        startActivityForResult(Intent.createChooser(intent, this.getString(R.string.select_image_from_gallery)), REQUEST_CODE_GALLERY);
    }

    /*
     * PermissionHelper overrides
     */

    @Override public void onPermissionGranted(@NonNull String[] permissionName)
    {
        //Log.i(LOG_TAG, "onPermissionGranted | Permission(s) " + Arrays.toString(permissionName) + " Granted");
    }

    @Override public void onPermissionDeclined(@NonNull String[] permissionName)
    {
        //Log.i(LOG_TAG, "onPermissionDeclined | Permission(s) " + Arrays.toString(permissionName) + " Declined");
    }

    @Override public void onPermissionPreGranted(@NonNull String permissionsName)
    {
        //Log.i(LOG_TAG, "onPermissionPreGranted | Permission( " + permissionsName + " ) preGranted");
    }

    @Override public void onPermissionNeedExplanation(@NonNull String permissionName)
    {
        //Log.d(LOG_TAG, "onPermissionPreGranted | Permission( " + permissionName + " ) preGranted");
    }

    @Override public void onPermissionReallyDeclined(@NonNull String permissionName)
    {
        //Log.i(LOG_TAG, "onPermissionReallyDeclined | Permission " + permissionName + " can only be granted from settingsScreen");
    }

    @Override public void onNoPermissionNeeded() {
        //Log.i(LOG_TAG, "onNoPermissionNeeded | Permission(s) not needed");
    }

    @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
    {
        // Skipping parent on purpose, I don't want to keep annoying the user about declined, and permanently declined perms
        // onRequestPermissionsResult(requestCode, permissions, grantResults);

        List<String> declinedPermissionsAsList;

        declinedPermissionsAsList = permissionHelper.declinedPermissionsAsList(this, permissions);

        if (!declinedPermissionsAsList.isEmpty()) {

            final String[] declinedPermissions = declinedPermissionsAsList.toArray(new String[declinedPermissionsAsList.size()]);

            for (int i = 0; i < declinedPermissions.length; i++) {

                declinedPermissions[i] = convertPermToHumanReadable(declinedPermissions[i]);
            }

            AlertDialog dialog = new AlertDialog.Builder(this)
                .setTitle("The following perms must be allowed to upload photos:")
                .setItems(declinedPermissions, null)
                .setPositiveButton("!shouttag Settings", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        permissionHelper.openSettingsScreen();

                        fileUriCallback.onReceiveValue(new Uri[]{});

                        fileUriCallback = null;
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        fileUriCallback.onReceiveValue(new Uri[]{});

                        fileUriCallback = null;

                        dialog.dismiss();
                    }
                })
                .show();

            dialog.getButton(dialog.BUTTON_NEGATIVE).setTextColor(Color.RED);
            dialog.getButton(dialog.BUTTON_POSITIVE).setTextColor(Color.rgb(60, 179, 113));

        } else {

            if (Arrays.asList(permissions).contains(Manifest.permission.CAMERA)) {

                showCamera();

            } else {

                showGallery();
            }
        }
    }
}