Android Open Source - Web-wrapper Web Activity

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License

The source code is released under:
Apache License
If you think the Android project Web-wrapper listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.periplanisi.android.webwrapper.ui.activity;
// w ww.j  a v a 2 s . c o m
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.CookieManager;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.TextView;

import com.periplanisi.android.webwrapper.R;
import com.periplanisi.android.webwrapper.settings.SettingsHelper;
import com.periplanisi.android.webwrapper.web.WebPageLoadListener;
import com.periplanisi.android.webwrapper.web.WrapperWebViewClient;

/**
 * Main activity for displaying the web wrapper
 * 
 * @author Ioannis Panagiotopoulos <ipanag+android@gmail.com>
 *
 */
public class WebActivity extends BaseActivity implements WebPageLoadListener {

  private static final String URL_KEY = "url_key";
  private static final String AUTH_KEY = "auth_key";
  private static final String USER_KEY = "user_key";
  private static final String PASS_KEY = "pass_key";
  
  private WebView webView;
  private WrapperWebViewClient webClient;
  private SettingsHelper settingsHelper;
  private TextView errorView;
  private View loadingView;
  
  private static enum VIEW_STATE {
    LOADING,
    CONTENT,
    ERROR;
  }
  
  private VIEW_STATE state = VIEW_STATE.CONTENT;
  
  public static Intent getStartIntent(Context context, String url, boolean authRequired,
      String username, String password) {
    Intent intent = new Intent(context, WebActivity.class);
    intent.putExtra(URL_KEY, url);
    intent.putExtra(AUTH_KEY, authRequired);
    intent.putExtra(USER_KEY, username);
    intent.putExtra(PASS_KEY, password);
    
    return intent;
  }
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_web);
    
    settingsHelper = SettingsHelper.getInstance(this);

    webView = (WebView) findViewById(R.id.webview);
    errorView = (TextView) findViewById(R.id.errorText);
    loadingView = findViewById(R.id.loader);
    
    switchToState(state);
    
    webClient = new WrapperWebViewClient(this, settingsHelper);
    webView.setWebViewClient(webClient);
    
    // http://stackoverflow.com/questions/3998916/android-webview-leaves-space-for-scrollbar
    webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    
    updateWebViewSettings();
    
    CookieManager.getInstance().setAcceptCookie(true);
    
    String url = getIntent().getStringExtra(URL_KEY);
    boolean authRequired = getIntent().getBooleanExtra(AUTH_KEY, false);
    if(authRequired) {
      String username = getIntent().getStringExtra(USER_KEY);
      String password = getIntent().getStringExtra(PASS_KEY);
      webClient.setUsernamePassword(username, password);
    }
    
    webView.loadUrl(url);
  }
  
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
      if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
        switchToState(VIEW_STATE.CONTENT);
        webView.stopLoading();
        webView.goBack();
        return true;
      }
      return super.onKeyDown(keyCode, event);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.web, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    int itemId = item.getItemId();
    if (itemId == R.id.action_refresh) {
      webView.reload();
      return true;
      }
      
    return super.onOptionsItemSelected(item);
  }
  
  @Override
  protected void onSettingsUpdate() {
    super.onSettingsUpdate();
    
    updateWebViewSettings();
    
    webView.reload();
  }
  
  @SuppressLint("SetJavaScriptEnabled")
  private void updateWebViewSettings() {
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(settingsHelper.isJavascriptEnabled());
    webSettings.setBuiltInZoomControls(settingsHelper.isBuiltInZoomControls());
    
    if(!isOldApiZoomControls()) {
      setNewApiZoomControls(webSettings, settingsHelper.isDisplayZoomControls());
    }
    
    ActionBar actionBar = getSupportActionBar();
    if(actionBar != null && settingsHelper.isShowActionBar()) {
      actionBar.show();
    } else {
      actionBar.hide();
    }
  }

  @Override
  public void onPageLoadedSuccessfully() {
    setTitle(webView.getTitle());
    switchToState(VIEW_STATE.CONTENT);
  }

  @Override
  public void onPageLoadedFailure(int errorCode, String description, String failingUrl) {
    errorView.setText("errorCode: " + errorCode + "\ndescription: " + description + "\nfailingUrl: " + failingUrl);
    switchToState(VIEW_STATE.ERROR);
  }

  @Override
  public void onPageStartLoading() {
    switchToState(VIEW_STATE.LOADING);
  }
  
  private void switchToState(VIEW_STATE newState) {
    switch(newState) {
    case CONTENT:
      loadingView.setVisibility(View.GONE);
      errorView.setVisibility(View.GONE);
      webView.setVisibility(View.VISIBLE);
      break;
    case ERROR:
      loadingView.setVisibility(View.GONE);
      errorView.setVisibility(View.VISIBLE);
      webView.setVisibility(View.GONE);
      break;
    case LOADING:
      loadingView.setVisibility(View.VISIBLE);
      errorView.setVisibility(View.GONE);
      webView.setVisibility(View.GONE);
      break;
    default:
      break;
    
    }
    state = newState;
  }
  
  private static boolean isOldApiZoomControls() {
    return Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB;
  }
  
  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
  private void setNewApiZoomControls(WebSettings webSettings, boolean enabled) {
    webSettings.setDisplayZoomControls(enabled);
  }
  
}
Java Source Code List
