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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.apis.app;
     18 
     19 import android.app.Activity;
     20 import android.content.Context;
     21 import android.os.Bundle;
     22 import android.print.PrintManager;
     23 import android.view.Menu;
     24 import android.view.MenuItem;
     25 import android.webkit.WebView;
     26 import android.webkit.WebViewClient;
     27 
     28 import com.example.android.apis.R;
     29 
     30 /**
     31  * This class demonstrates how to implement HTML content printing
     32  * from a {@link WebView} which is shown on the screen.
     33  * <p>
     34  * This activity shows a simple HTML content in a {@link WebView}
     35  * and allows the user to print that content via an action in the
     36  * action bar. The shown {@link WebView} is doing the printing.
     37  * </p>
     38  *
     39  * @see PrintManager
     40  * @see WebView
     41  */
     42 public class PrintHtmlFromScreen extends Activity {
     43 
     44     private WebView mWebView;
     45 
     46     private boolean mDataLoaded;
     47 
     48     @Override
     49     protected void onCreate(Bundle savedInstanceState) {
     50         super.onCreate(savedInstanceState);
     51         setContentView(R.layout.print_html_from_screen);
     52         mWebView = (WebView) findViewById(R.id.web_view);
     53 
     54         // Important: Only enable the print option after the page is loaded.
     55         mWebView.setWebViewClient(new WebViewClient() {
     56             @Override
     57             public void onPageFinished(WebView view, String url) {
     58                 // Data loaded, so now we want to show the print option.
     59                 mDataLoaded = true;
     60                 invalidateOptionsMenu();
     61             }
     62         });
     63 
     64         // Load an HTML page.
     65         mWebView.loadUrl("file:///android_res/raw/motogp_stats.html");
     66     }
     67 
     68     @Override
     69     public boolean onCreateOptionsMenu(Menu menu) {
     70         super.onCreateOptionsMenu(menu);
     71         if (mDataLoaded) {
     72             getMenuInflater().inflate(R.menu.print_custom_content, menu);
     73         }
     74         return true;
     75     }
     76 
     77     @Override
     78     public boolean onOptionsItemSelected(MenuItem item) {
     79         if (item.getItemId() == R.id.menu_print) {
     80             print();
     81             return true;
     82         }
     83         return super.onOptionsItemSelected(item);
     84     }
     85 
     86     private void print() {
     87         // Get the print manager.
     88         PrintManager printManager = (PrintManager) getSystemService(
     89                 Context.PRINT_SERVICE);
     90         // Pass in the ViewView's document adapter.
     91         printManager.print("MotoGP stats", mWebView.createPrintDocumentAdapter(), null);
     92     }
     93 }
     94