Java tutorial
/* Copyright 2014 Giovanni Di Gregorio. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package com.purchasingpower.inappbrowser; import android.Manifest; import android.app.Activity; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Build; import android.os.Environment; import android.os.Parcelable; import android.provider.MediaStore; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.util.Log; import android.webkit.ValueCallback; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebChromeClient; import android.os.Bundle; import android.content.Intent; import android.widget.ProgressBar; import android.view.View; import android.webkit.WebViewClient; import android.widget.Button; import android.app.ProgressDialog; import android.graphics.Bitmap; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.example.hello.MainActivity; import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; public class WebViewActivity extends Activity { private static final int INPUT_FILE_REQUEST_CODE = 1; private static final int FILECHOOSER_RESULTCODE = 1; private static final String TAG = com.purchasingpower.inappbrowser.WebViewActivity.class.getSimpleName(); ImageView back; ImageView forward; TextView done; ProgressBar pbar; private WebSettings webSettings; private ValueCallback<Uri> mUploadMessage; private Uri mCapturedImageURI = null; private ValueCallback<Uri[]> mFilePathCallback; private String mCameraPhotoPath; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.activity_main); setContentView(getResources().getIdentifier("nativebrowserplugin", "layout", getPackageName())); if (!checkPermission()) { requestPermission(); } Intent intent = getIntent(); String url = intent.getExtras().getString("url"); final WebView myWebView = (WebView) findViewById( getResources().getIdentifier("webview", "id", getPackageName())); myWebView.setWebViewClient(new MyWebViewClient()); webSettings = myWebView.getSettings(); webSettings.setJavaScriptEnabled(true); webSettings.setLoadWithOverviewMode(true); webSettings.setAllowFileAccess(true); myWebView.setWebChromeClient(new PQChromeClient()); //if SDK version is greater of 19 then activate hardware acceleration otherwise activate software acceleration if (Build.VERSION.SDK_INT >= 19) { myWebView.setLayerType(View.LAYER_TYPE_HARDWARE, null); } else if (Build.VERSION.SDK_INT >= 11 && Build.VERSION.SDK_INT < 19) { myWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null); } myWebView.loadUrl(url); back = (ImageView) findViewById(getResources().getIdentifier("back", "id", getPackageName())); back.setImageResource(getResources().getIdentifier("back_gray", "drawable", getPackageName())); forward = (ImageView) findViewById(getResources().getIdentifier("forward", "id", getPackageName())); forward.setImageResource(getResources().getIdentifier("forward_gray", "drawable", getPackageName())); done = (TextView) findViewById(getResources().getIdentifier("done", "id", getPackageName())); pbar = (ProgressBar) findViewById(getResources().getIdentifier("pbar", "id", getPackageName())); pbar.setVisibility(View.VISIBLE); back.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (myWebView.canGoBack()) { myWebView.goBack(); } } }); forward.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (myWebView.canGoForward()) { myWebView.goForward(); } } }); done.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.v("Done", "Clicked"); finish(); } }); } // Checking permission at Runtime for Marshmallow and above. private boolean checkPermission() { int result = ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA); if (result == PackageManager.PERMISSION_GRANTED) { return true; } else { return false; } } // Requesting permission at Runtime for Marshmallow and above. private void requestPermission() { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) { } else { ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE }, 1);// } } // Granting permission at Runtime for Marshmallow and above. @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { switch (requestCode) { case 1: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { } break; } } @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) { if (requestCode != FILECHOOSER_RESULTCODE || mUploadMessage == null) { super.onActivityResult(requestCode, resultCode, data); return; } 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; } } return; } 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 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); File imageFile = File.createTempFile(imageFileName, /* prefix */ ".jpg", /* suffix */ storageDir /* directory */ ); return imageFile; } public class PQChromeClient extends WebChromeClient { // For Android 5.0 public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams) { // Double check that we don't have any existing callbacks if (mFilePathCallback != null) { mFilePathCallback.onReceiveValue(null); } mFilePathCallback = filePath; 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("*/*"); 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; } // openFileChooser for Android 3.0+ public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) { mUploadMessage = uploadMsg; // Create AndroidExampleFolder at sdcard // Create AndroidExampleFolder at sdcard File imageStorageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "AndroidExampleFolder"); if (!imageStorageDir.exists()) { // Create AndroidExampleFolder at sdcard imageStorageDir.mkdirs(); } // Create camera captured image file path and name File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg"); mCapturedImageURI = Uri.fromFile(file); // Camera capture image intent final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI); Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.addCategory(Intent.CATEGORY_OPENABLE); i.setType("*/*"); // Create file chooser intent Intent chooserIntent = Intent.createChooser(i, "Image Chooser"); // Set camera intent to file chooser chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[] { captureIntent }); // On select image call onActivityResult method of activity startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE); } // openFileChooser for Android < 3.0 public void openFileChooser(ValueCallback<Uri> uploadMsg) { openFileChooser(uploadMsg, ""); } //openFileChooser for other Android versions public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) { openFileChooser(uploadMsg, acceptType); } } private class MyWebViewClient extends WebViewClient { @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { super.onPageStarted(view, url, favicon); pbar.setVisibility(View.VISIBLE); back.setEnabled(view.canGoBack()); forward.setEnabled(view.canGoForward()); if (view.canGoBack()) { back.setImageResource(getResources().getIdentifier("back_blue", "drawable", getPackageName())); } else { back.setImageResource(getResources().getIdentifier("back_gray", "drawable", getPackageName())); } if (view.canGoForward()) { forward.setImageResource( getResources().getIdentifier("forward_blue", "drawable", getPackageName())); } else { forward.setImageResource( getResources().getIdentifier("forward_gray", "drawable", getPackageName())); } //You can add some custom functionality here } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { // TODO Auto-generated method stub if (url.contains("mailto:")) { // Could be cleverer and use a regex //Open links in new browser view.getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url))); // Here we can open new activity return true; } else { // Stay within this webview and load url view.loadUrl(url); return true; } } @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); pbar.setVisibility(View.GONE); back.setEnabled(view.canGoBack()); forward.setEnabled(view.canGoForward()); if (view.canGoBack()) { back.setImageResource(getResources().getIdentifier("back_blue", "drawable", getPackageName())); } else { back.setImageResource(getResources().getIdentifier("back_gray", "drawable", getPackageName())); } if (view.canGoForward()) { forward.setImageResource( getResources().getIdentifier("forward_blue", "drawable", getPackageName())); } else { forward.setImageResource( getResources().getIdentifier("forward_gray", "drawable", getPackageName())); } //You can add some custom functionality here } } }