--- /dev/null
+/*
+ * Copyright © 2020 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ *
+ * Privacy Browser is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Privacy Browser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacybrowser.asynctasks;
+
+import android.app.Activity;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import androidx.core.content.FileProvider;
+
+import com.google.android.material.snackbar.Snackbar;
+
+import com.stoutner.privacybrowser.R;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.lang.ref.WeakReference;
+
+public class SaveAboutVersionImage extends AsyncTask<Void, Void, String> {
+ // Declare the weak references.
+ private WeakReference<Context> contextWeakReference;
+ private WeakReference<Activity> activityWeakReference;
+ private WeakReference<LinearLayout> aboutVersionLinearLayoutWeakReference;
+
+ // Declare the class constants.
+ private final String SUCCESS = "Success";
+
+ // Declare the class variables.
+ private Snackbar savingImageSnackbar;
+ private Bitmap aboutVersionBitmap;
+ private String filePathString;
+
+ // The public constructor.
+ public SaveAboutVersionImage(Context context, Activity activity, String filePathString, LinearLayout aboutVersionLinearLayout) {
+ // Populate the weak references.
+ contextWeakReference = new WeakReference<>(context);
+ activityWeakReference = new WeakReference<>(activity);
+ aboutVersionLinearLayoutWeakReference = new WeakReference<>(aboutVersionLinearLayout);
+
+ // Store the class variables.
+ this.filePathString = filePathString;
+ }
+
+ // `onPreExecute()` operates on the UI thread.
+ @Override
+ protected void onPreExecute() {
+ // Get handles for the activity and the linear layout.
+ Activity activity = activityWeakReference.get();
+ LinearLayout aboutVersionLinearLayout = aboutVersionLinearLayoutWeakReference.get();
+
+ // Abort if the activity or the linear layout is gone.
+ if ((activity == null) || activity.isFinishing() || aboutVersionLinearLayout == null) {
+ return;
+ }
+
+ // Create a saving image snackbar.
+ savingImageSnackbar = Snackbar.make(aboutVersionLinearLayout, activity.getString(R.string.processing_image) + " " + filePathString, Snackbar.LENGTH_INDEFINITE);
+
+ // Display the saving image snackbar.
+ savingImageSnackbar.show();
+
+ // Create the about version bitmap. This can be replaced by PixelCopy once the minimum API >= 26.
+ // Once the Minimum API >= 26 Bitmap.Config.RBGA_F16 can be used instead of ARGB_8888. The linear layout commands must be run on the UI thread.
+ aboutVersionBitmap = Bitmap.createBitmap(aboutVersionLinearLayout.getWidth(), aboutVersionLinearLayout.getHeight(), Bitmap.Config.ARGB_8888);
+
+ // Create a canvas.
+ Canvas aboutVersionCanvas = new Canvas(aboutVersionBitmap);
+
+ // Draw the current about version onto the bitmap. The linear layout commands must be run on the UI thread.
+ aboutVersionLinearLayout.draw(aboutVersionCanvas);
+ }
+
+ @Override
+ protected String doInBackground(Void... Void) {
+ // Get a handle for the activity.
+ Activity activity = activityWeakReference.get();
+
+ // Abort if the activity is gone.
+ if (((activity == null) || activity.isFinishing())) {
+ return "";
+ }
+
+ // Create an about version PNG byte array output stream.
+ ByteArrayOutputStream aboutVersionByteArrayOutputStream = new ByteArrayOutputStream();
+
+ // Convert the bitmap to a PNG. `0` is for lossless compression (the only option for a PNG). This compression takes a long time. Once the minimum API >= 30 this could be replaced with WEBP_LOSSLESS.
+ aboutVersionBitmap.compress(Bitmap.CompressFormat.PNG, 0, aboutVersionByteArrayOutputStream);
+
+ // Get a file for the image.
+ File imageFile = new File(filePathString);
+
+ // Delete the current file if it exists.
+ if (imageFile.exists()) {
+ //noinspection ResultOfMethodCallIgnored
+ imageFile.delete();
+ }
+
+ // Create a file creation disposition string.
+ String fileCreationDisposition = SUCCESS;
+
+ try {
+ // Create an image file output stream.
+ FileOutputStream imageFileOutputStream = new FileOutputStream(imageFile);
+
+ // Write the webpage image to the image file.
+ aboutVersionByteArrayOutputStream.writeTo(imageFileOutputStream);
+
+ // Create a media scanner intent, which adds items like pictures to Android's recent file list.
+ Intent mediaScannerIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+
+ // Add the URI to the media scanner intent.
+ mediaScannerIntent.setData(Uri.fromFile(imageFile));
+
+ // Make it so.
+ activity.sendBroadcast(mediaScannerIntent);
+ } catch (Exception exception) {
+ // Store the error in the file creation disposition string.
+ fileCreationDisposition = exception.toString();
+ }
+
+ // return the file creation disposition string.
+ return fileCreationDisposition;
+ }
+
+ // `onPostExecute()` operates on the UI thread.
+ @Override
+ protected void onPostExecute(String fileCreationDisposition) {
+ // Get handles for the weak references.
+ Context context = contextWeakReference.get();
+ Activity activity = activityWeakReference.get();
+ LinearLayout aboutVersionLinearLayout = aboutVersionLinearLayoutWeakReference.get();
+
+ // Abort if the activity is gone.
+ if ((activity == null) || activity.isFinishing()) {
+ return;
+ }
+
+ // Dismiss the saving image snackbar.
+ savingImageSnackbar.dismiss();
+
+ // Display a file creation disposition snackbar.
+ if (fileCreationDisposition.equals(SUCCESS)) {
+ // Create a file saved snackbar.
+ Snackbar imageSavedSnackbar = Snackbar.make(aboutVersionLinearLayout, activity.getString(R.string.file_saved) + " " + filePathString, Snackbar.LENGTH_SHORT);
+
+ // Add an open action.
+ imageSavedSnackbar.setAction(R.string.open, (View view) -> {
+ // Get a file for the file path string.
+ File file = new File(filePathString);
+
+ // Declare a file URI variable.
+ Uri fileUri;
+
+ // Get the URI for the file according to the Android version.
+ if (Build.VERSION.SDK_INT >= 24) { // Use a file provider.
+ fileUri = FileProvider.getUriForFile(context, activity.getString(R.string.file_provider), file);
+ } else { // Get the raw file path URI.
+ fileUri = Uri.fromFile(file);
+ }
+
+ // Get a handle for the content resolver.
+ ContentResolver contentResolver = context.getContentResolver();
+
+ // Create an open intent with `ACTION_VIEW`.
+ Intent openIntent = new Intent(Intent.ACTION_VIEW);
+
+ // Autodetect the MIME type.
+ openIntent.setDataAndType(fileUri, contentResolver.getType(fileUri));
+
+ // Allow the app to read the file URI.
+ openIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+
+ // Show the chooser.
+ activity.startActivity(Intent.createChooser(openIntent, context.getString(R.string.open)));
+ });
+
+ // Show the image saved snackbar.
+ imageSavedSnackbar.show();
+ } else {
+ Snackbar.make(aboutVersionLinearLayout, activity.getString(R.string.error_saving_file) + " " + fileCreationDisposition, Snackbar.LENGTH_INDEFINITE).show();
+ }
+ }
+}
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projects / PrivacyBrowserAndroid.git / blobdiff