Update browseable samples for lmp-docs
Synced to commit df5e5013422b81b4fd05c0ac9fd964b13624847a. Includes new samples for Android Auto. Change-Id: I3fec46e2a6b3f196682a92f1afd91eb682dc2dc1
This commit is contained in:
Trevor Johns
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.pdfrendererbasic;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.os.Bundle;
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import android.view.Menu;
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import android.view.MenuItem;
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public class MainActivity extends Activity {
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public static final String FRAGMENT_PDF_RENDERER_BASIC = "pdf_renderer_basic";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main_real);
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if (savedInstanceState == null) {
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getFragmentManager().beginTransaction()
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.add(R.id.container, new PdfRendererBasicFragment(),
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FRAGMENT_PDF_RENDERER_BASIC)
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.commit();
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}
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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getMenuInflater().inflate(R.menu.main, menu);
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return true;
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch (item.getItemId()) {
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case R.id.action_info:
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new AlertDialog.Builder(this)
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.setMessage(R.string.intro_message)
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.setPositiveButton(android.R.string.ok, null)
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.show();
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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}
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@@ -0,0 +1,221 @@
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.pdfrendererbasic;
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import android.app.Activity;
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import android.app.Fragment;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.pdf.PdfRenderer;
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import android.os.Bundle;
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import android.os.ParcelFileDescriptor;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.Button;
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import android.widget.ImageView;
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import android.widget.Toast;
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import java.io.IOException;
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/**
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* This fragment has a big {@ImageView} that shows PDF pages, and 2 {@link android.widget.Button}s to move between
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* pages. We use a {@link android.graphics.pdf.PdfRenderer} to render PDF pages as {@link android.graphics.Bitmap}s.
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*/
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public class PdfRendererBasicFragment extends Fragment implements View.OnClickListener {
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/**
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* Key string for saving the state of current page index.
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*/
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private static final String STATE_CURRENT_PAGE_INDEX = "current_page_index";
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/**
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* File descriptor of the PDF.
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*/
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private ParcelFileDescriptor mFileDescriptor;
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/**
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* {@link android.graphics.pdf.PdfRenderer} to render the PDF.
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*/
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private PdfRenderer mPdfRenderer;
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/**
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* Page that is currently shown on the screen.
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*/
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private PdfRenderer.Page mCurrentPage;
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/**
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* {@link android.widget.ImageView} that shows a PDF page as a {@link android.graphics.Bitmap}
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*/
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private ImageView mImageView;
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/**
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* {@link android.widget.Button} to move to the previous page.
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*/
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private Button mButtonPrevious;
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/**
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* {@link android.widget.Button} to move to the next page.
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*/
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private Button mButtonNext;
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public PdfRendererBasicFragment() {
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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Bundle savedInstanceState) {
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return inflater.inflate(R.layout.fragment_pdf_renderer_basic, container, false);
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}
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@Override
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public void onViewCreated(View view, Bundle savedInstanceState) {
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super.onViewCreated(view, savedInstanceState);
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// Retain view references.
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mImageView = (ImageView) view.findViewById(R.id.image);
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mButtonPrevious = (Button) view.findViewById(R.id.previous);
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mButtonNext = (Button) view.findViewById(R.id.next);
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// Bind events.
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mButtonPrevious.setOnClickListener(this);
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mButtonNext.setOnClickListener(this);
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// Show the first page by default.
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int index = 0;
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// If there is a savedInstanceState (screen orientations, etc.), we restore the page index.
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if (null != savedInstanceState) {
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index = savedInstanceState.getInt(STATE_CURRENT_PAGE_INDEX, 0);
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}
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showPage(index);
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}
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@Override
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public void onAttach(Activity activity) {
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super.onAttach(activity);
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try {
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openRenderer(activity);
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} catch (IOException e) {
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e.printStackTrace();
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Toast.makeText(activity, "Error! " + e.getMessage(), Toast.LENGTH_SHORT).show();
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activity.finish();
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}
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}
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@Override
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public void onDetach() {
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try {
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closeRenderer();
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} catch (IOException e) {
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e.printStackTrace();
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}
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super.onDetach();
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}
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@Override
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public void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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if (null != mCurrentPage) {
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outState.putInt(STATE_CURRENT_PAGE_INDEX, mCurrentPage.getIndex());
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}
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}
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/**
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* Sets up a {@link android.graphics.pdf.PdfRenderer} and related resources.
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*/
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private void openRenderer(Context context) throws IOException {
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// In this sample, we read a PDF from the assets directory.
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mFileDescriptor = context.getAssets().openFd("sample.pdf").getParcelFileDescriptor();
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// This is the PdfRenderer we use to render the PDF.
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mPdfRenderer = new PdfRenderer(mFileDescriptor);
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}
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/**
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* Closes the {@link android.graphics.pdf.PdfRenderer} and related resources.
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*
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* @throws java.io.IOException When the PDF file cannot be closed.
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*/
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private void closeRenderer() throws IOException {
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if (null != mCurrentPage) {
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mCurrentPage.close();
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}
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mPdfRenderer.close();
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mFileDescriptor.close();
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}
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/**
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* Shows the specified page of PDF to the screen.
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*
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* @param index The page index.
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*/
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private void showPage(int index) {
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if (mPdfRenderer.getPageCount() <= index) {
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return;
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}
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// Make sure to close the current page before opening another one.
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if (null != mCurrentPage) {
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mCurrentPage.close();
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}
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// Use `openPage` to open a specific page in PDF.
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mCurrentPage = mPdfRenderer.openPage(index);
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// Important: the destination bitmap must be ARGB (not RGB).
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Bitmap bitmap = Bitmap.createBitmap(mCurrentPage.getWidth(), mCurrentPage.getHeight(),
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Bitmap.Config.ARGB_8888);
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// Here, we render the page onto the Bitmap.
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// To render a portion of the page, use the second and third parameter. Pass nulls to get
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// the default result.
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// Pass either RENDER_MODE_FOR_DISPLAY or RENDER_MODE_FOR_PRINT for the last parameter.
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mCurrentPage.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
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// We are ready to show the Bitmap to user.
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mImageView.setImageBitmap(bitmap);
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updateUi();
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}
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/**
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* Updates the state of 2 control buttons in response to the current page index.
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*/
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private void updateUi() {
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int index = mCurrentPage.getIndex();
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int pageCount = mPdfRenderer.getPageCount();
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mButtonPrevious.setEnabled(0 != index);
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mButtonNext.setEnabled(index + 1 < pageCount);
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getActivity().setTitle(getString(R.string.app_name_with_index, index + 1, pageCount));
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}
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/**
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* Gets the number of pages in the PDF. This method is marked as public for testing.
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*
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* @return The number of pages.
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*/
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public int getPageCount() {
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return mPdfRenderer.getPageCount();
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}
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@Override
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public void onClick(View view) {
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switch (view.getId()) {
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case R.id.previous: {
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// Move to the previous page
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showPage(mCurrentPage.getIndex() - 1);
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break;
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}
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case R.id.next: {
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// Move to the next page
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showPage(mCurrentPage.getIndex() + 1);
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break;
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}
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}
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}
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}
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