Android/app/src/main/java/com/moiseum/wolnelektury/view/WebViewFragment.java

   1 package com.moiseum.wolnelektury.view;
   2
   3 import android.os.Bundle;
   4 import android.support.v4.app.Fragment;
   5 import android.view.View;
   6 import android.webkit.WebSettings;
   7 import android.webkit.WebView;
   8 import android.webkit.WebViewClient;
   9 import android.widget.Button;
  10 import android.widget.TextView;
  11
  12 import com.moiseum.wolnelektury.R;
  13 import com.moiseum.wolnelektury.base.AbstractFragment;
  14
  15 import butterknife.BindView;
  16
  17 /**
  18  * @author golonkos.
  19  */
  20
  21 public class WebViewFragment extends AbstractFragment {
  22
  23         private static final String PARAM_URL = "PARAM_URL";
  24
  25         @BindView(R.id.wvAbout)
  26         WebView wvPage;
  27         @BindView(R.id.btnBack)
  28         Button btnBack;
  29         @BindView(R.id.btnRefresh)
  30         Button btnRefresh;
  31         @BindView(R.id.btnNext)
  32         Button btnNext;
  33         @BindView(R.id.tvPageError)
  34         TextView tvPageError;
  35
  36         private boolean loadFailed;
  37
  38         public static Fragment newInstance(String url) {
  39                 WebViewFragment fragment = new WebViewFragment();
  40                 Bundle args = new Bundle(1);
  41                 args.putString(PARAM_URL, url);
  42                 fragment.setArguments(args);
  43                 return fragment;
  44         }
  45
  46         @Override
  47         public int getLayoutResourceId() {
  48                 return R.layout.fragment_web_view;
  49         }
  50
  51         @Override
  52         public void prepareView(View view, Bundle savedInstanceState) {
  53                 initWebView();
  54         }
  55
  56         private void initWebView() {
  57                 wvPage.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
  58                 wvPage.getSettings().setJavaScriptEnabled(true);
  59                 wvPage.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
  60                 wvPage.setWebViewClient(new WebViewClient() {
  61
  62                         @Override
  63                         public boolean shouldOverrideUrlLoading(WebView view, String url) {
  64                                 wvPage.loadUrl(url);
  65                                 return true;
  66                         }
  67
  68                         @Override
  69                         public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
  70                                 if (tvPageError == null) {
  71                                         return;
  72                                 }
  73                                 loadFailed = true;
  74                                 tvPageError.setVisibility(View.VISIBLE);
  75                         }
  76
  77                         @Override
  78                         public void onPageFinished(WebView view, String url) {
  79                                 super.onPageFinished(view, url);
  80                                 if (tvPageError == null) {
  81                                         return;
  82                                 }
  83                                 if (!loadFailed) {
  84                                         tvPageError.setVisibility(View.GONE);
  85                                 }
  86                                 btnBack.setEnabled(wvPage.canGoBack());
  87                                 btnNext.setEnabled(wvPage.canGoForward());
  88                         }
  89                 });
  90                 String url = getArguments().getString(PARAM_URL);
  91                 wvPage.loadUrl(url);
  92
  93                 btnRefresh.setOnClickListener(new View.OnClickListener() {
  94                         @Override
  95                         public void onClick(View v) {
  96                                 loadFailed = false;
  97                                 wvPage.reload();
  98                         }
  99                 });
 100
 101                 btnBack.setOnClickListener(new View.OnClickListener() {
 102                         @Override
 103                         public void onClick(View v) {
 104                                 wvPage.goBack();
 105                         }
 106                 });
 107
 108                 btnNext.setOnClickListener(new View.OnClickListener() {
 109                         @Override
 110                         public void onClick(View v) {
 111                                 wvPage.goForward();
 112                         }
 113                 });
 114         }
 115 }