| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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.android.bips; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.os.CancellationSignal; |
| import android.os.ParcelFileDescriptor; |
| import android.print.PageRange; |
| import android.print.PrintAttributes; |
| import android.print.PrintDocumentAdapter; |
| import android.print.PrintDocumentInfo; |
| import android.print.PrintManager; |
| import android.util.Log; |
| import android.webkit.URLUtil; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * Activity to receive share-to-print intents for PDF documents. |
| */ |
| public class PdfPrintActivity extends Activity { |
| private static final String TAG = PdfPrintActivity.class.getSimpleName(); |
| private static final boolean DEBUG = false; |
| |
| private CancellationSignal mCancellationSignal; |
| private String mJobName; |
| Uri mContentUri = null; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| String action = getIntent().getAction(); |
| if (Intent.ACTION_SEND.equals(action)) { |
| mContentUri = getIntent().getParcelableExtra(Intent.EXTRA_STREAM); |
| } else if (Intent.ACTION_VIEW.equals(action)) { |
| mContentUri = getIntent().getData(); |
| } |
| if (mContentUri == null) { |
| finish(); |
| } |
| mJobName = URLUtil.guessFileName(getIntent().getStringExtra(Intent.EXTRA_TEXT), null, |
| getIntent().resolveType(this)); |
| if (DEBUG) Log.d(TAG, "onCreate() uri=" + mContentUri + " jobName=" + mJobName); |
| |
| PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE); |
| if (printManager == null) { |
| finish(); |
| return; |
| } |
| |
| PrintAttributes printAttributes = new PrintAttributes.Builder() |
| .setColorMode(PrintAttributes.COLOR_MODE_COLOR) |
| .build(); |
| printManager.print(mJobName, new PdfAdapter(), printAttributes); |
| } |
| |
| @Override |
| protected void onDestroy() { |
| if (DEBUG) Log.d(TAG, "onDestroy()"); |
| if (mCancellationSignal != null) { |
| mCancellationSignal.cancel(); |
| } |
| super.onDestroy(); |
| } |
| |
| private class PdfAdapter extends PrintDocumentAdapter { |
| @Override |
| public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, |
| CancellationSignal cancellationSignal, LayoutResultCallback callback, |
| Bundle bundle) { |
| if (DEBUG) Log.d(TAG, "onLayout() attrs=" + newAttributes); |
| |
| PrintDocumentInfo info = new PrintDocumentInfo.Builder(mJobName) |
| .setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT) |
| .setPageCount(PrintDocumentInfo.PAGE_COUNT_UNKNOWN) |
| .build(); |
| callback.onLayoutFinished(info, false); |
| } |
| |
| @Override |
| public void onWrite(PageRange[] pageRanges, ParcelFileDescriptor fileDescriptor, |
| CancellationSignal cancellationSignal, WriteResultCallback callback) { |
| if (DEBUG) Log.d(TAG, "onWrite()"); |
| mCancellationSignal = cancellationSignal; |
| new PdfDeliverTask(fileDescriptor, callback).execute(); |
| } |
| |
| @Override |
| public void onFinish() { |
| if (DEBUG) Log.d(TAG, "onFinish()"); |
| finish(); |
| } |
| } |
| |
| private class PdfDeliverTask extends AsyncTask<Void, Void, Void> { |
| ParcelFileDescriptor mDescriptor; |
| PrintDocumentAdapter.WriteResultCallback mCallback; |
| |
| PdfDeliverTask(ParcelFileDescriptor descriptor, |
| PrintDocumentAdapter.WriteResultCallback callback) { |
| mDescriptor = descriptor; |
| mCallback = callback; |
| } |
| |
| @Override |
| protected Void doInBackground(Void... voids) { |
| try (InputStream in = getContentResolver().openInputStream(mContentUri)) { |
| if (in == null) { |
| throw new IOException("Failed to open input stream"); |
| } |
| try (OutputStream out = new FileOutputStream(mDescriptor.getFileDescriptor())) { |
| byte[] buffer = new byte[10 * 1024]; |
| int length; |
| while ((length = in.read(buffer)) >= 0 && !mCancellationSignal.isCanceled()) { |
| out.write(buffer, 0, length); |
| } |
| } |
| if (mCancellationSignal.isCanceled()) { |
| mCallback.onWriteCancelled(); |
| } else { |
| mCallback.onWriteFinished(new PageRange[] { PageRange.ALL_PAGES }); |
| } |
| } catch (IOException e) { |
| Log.w(TAG, "Failed to deliver content", e); |
| mCallback.onWriteFailed(e.getMessage()); |
| } |
| return null; |
| } |
| } |
| } |