Android Open Source - android-webview-example Start Activity

• Back to UI/example  ↑

From Project

Back to project page android-webview-example.

License

The source code is released under:

Apache License

Java Source Code

package com.significantfiles.mrcounter;
/*  www . j a  va 2  s . com*/
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.provider.Contacts.People;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebSettings.RenderPriority;

import com.significantfiles.android.sqlite.GET;
import com.significantfiles.mrcounter.R;
import com.significantfiles.mrcounter.js.CreateCreditControl;
import com.significantfiles.mrcounter.js.WebViewFacade;

import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import static com.significantfiles.mrcounter.ActivityRequestCode.*;

/**
 * // createView( "file:///android_asset/html/startProcess.html" ); // loadUrl(
 * "file:///android_asset/html/startProcess.html" );
 * 
 * @author Andreas Siebert
 */
public class StartActivity extends Activity {

  // private static final String START_ACTIVITY =
  // "file:///android_asset/html/test/useJavaItf.html";

  private static final String START_ACTIVITY = "file:///android_asset/html/performance_create_credit.html";

  private WebView webView;

  private CreateCreditControl createCreditControl;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    try {
      super.onCreate(savedInstanceState);

      /* 
       * final Window window = getWindow();
       * 
       * window.setFormat(PixelFormat.RGBA_8888);
       */

      setContentView(R.layout.credits_list);

      if (savedInstanceState != null) {
        reuseView(savedInstanceState);
      } else {
        createView(START_ACTIVITY);
      }
    } catch (Throwable e) {
      // TODO: handle exception
      Log.e("lll", "jjj", e);
      e.printStackTrace();

    }
  }

  private void createView(final String url) {
    this.webView = (WebView) findViewById(R.id.webview);
    this.webView.setAlwaysDrawnWithCacheEnabled(true);
    this.webView.setAnimationCacheEnabled(true);
    this.webView.setFocusableInTouchMode(true);
    this.webView.setDrawingCacheEnabled(true);
    this.webView.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_LOW);
    this.webView.setDrawingCacheEnabled(true);
    this.webView.setKeepScreenOn(true);
    
    this.webView.setWebViewClient(new WebViewClient());

    final WebSettings webSettings = webView.getSettings();
    webSettings.setSavePassword(false);
    webSettings.setSaveFormData(false);
    webSettings.setJavaScriptEnabled(true);
    webSettings.setSupportZoom(false);
    webSettings.setCacheMode( WebSettings.LOAD_NO_CACHE );
    webSettings.setPluginsEnabled( false );
    webSettings.setSupportMultipleWindows(false);
    webSettings.setRenderPriority( RenderPriority.HIGH );
    webSettings.setUseWideViewPort(true);
    
    final WebChromeClient chromeClient = new com.significantfiles.mrcounter.WebChromeClient(
        this);
    webView.setWebChromeClient(chromeClient);

    initJavaScriptInterfaces();

    webView.setAlwaysDrawnWithCacheEnabled(false);

    webView.loadUrl(url);
  }

  private void initJavaScriptInterfaces() {
    this.createCreditControl = new CreateCreditControl(webView);
    webView.addJavascriptInterface(createCreditControl,
        CreateCreditControl.name());
    
    final WebViewFacade webViewFacade = new WebViewFacade(webView);
    webView.addJavascriptInterface(webViewFacade,
        WebViewFacade.name());
  }

  private void reuseView(Bundle savedInstanceState) {
    this.webView = ((WebView) findViewById(R.id.webview));
    // this.webView.restoreState(savedInstanceState);
    this.webView.reload();
  }

  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    final boolean shouldGoBack = (keyCode == KeyEvent.KEYCODE_BACK)
        && webView.canGoBack();

    if (shouldGoBack) {
      webView.goBack();
      return true;
    }

    return super.onKeyDown(keyCode, event);
  }

  protected void onSaveInstanceState(Bundle outState) {
    webView.saveState(outState);
  }

  private Handler mHandler = new Handler();

  private void notifyJavascriptView(final int resultCode, final Intent data) {
    final Uri contact = data.getData();
    final Cursor cursor = managedQuery(contact, null, null, null, null);

    if (!cursor.moveToFirst()) {
      Log.e(Constants.LOG_TAG,
          "No contact selected. Or Contacts-DB is empty.");

      return;
    }

    final String name = GET.string(cursor, People.DISPLAY_NAME);
        final String phone = GET.string(cursor, People.NUMBER_KEY );
    
    mHandler.post(new Runnable() {
      public void run() {
        webView.loadUrl("javascript:contactSelected( '" + name + "', '" + phone + "' )");
      }
    });
  }

  @Override
  public void onActivityResult(int reqCode, int resultCode, Intent data) {
    super.onActivityResult(reqCode, resultCode, data);

    switch (reqCode) {
    case SELECT_CONTRACT:
      notifyJavascriptView(resultCode, data);
      break;
    }
  }

}

Java Source Code List

• Back to UI/example  ↑