WebBrowser.java

/**
 * Copyright 2009 Marc Stogaitis and Mimi Sun
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gmote.client.android;

import org.gmote.common.packet.AbstractPacket;
import org.gmote.common.packet.LaunchUrlPacket;

import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnKeyListener;
import android.webkit.URLUtil;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;

public class WebBrowser extends Activity implements BaseActivity{

  ActivityUtil mUtil = null;
  ProgressDialog mDialog = null;
  
  WebView webView = null;
  EditText urlView = null;
  Button goButton = null;
  View progressView = null;
  
  WebViewClient webViewClient = new WebViewClient() {
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
      urlView.setText(url);
      goButton.setVisibility(View.GONE);
      progressView.setVisibility(View.VISIBLE);
      super.onPageStarted(view, url, favicon);
    }

    @Override
    public void onPageFinished(WebView view, String url) {
      progressView.setVisibility(View.GONE);
      goButton.setVisibility(View.VISIBLE);
    }
  };
  
  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    mUtil = new ActivityUtil();
    mUtil.onCreate(icicle, this);
    
    setContentView(R.layout.web_browser);
    webView = (WebView) findViewById(R.id.web_browser_view);
    webView.setWebViewClient(webViewClient);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl("http://www.gmote.org/web");

    ((ViewGroup)findViewById(R.id.web_browser_zoom)).addView(webView.getZoomControls());
    webView.invokeZoomPicker();
    
    urlView = (EditText) findViewById(R.id.web_browser_url);
    urlView.setOnKeyListener(new OnKeyListener() {
      public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_ENTER) {
          webView.loadUrl(getUrl());
          return true;
        }
        return false;
      }
    });
    
    initializeUi();    
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    mUtil.onCreateOptionsMenu(menu);
    menu.removeItem(R.id.menui_web_browser);

    return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    super.onOptionsItemSelected(item);
    return mUtil.onOptionsItemSelected(item); 
  }
  
  @Override
  protected Dialog onCreateDialog(int id) {
    return mUtil.onCreateDialog(id);
  }
  
  
  @Override
  public void onStart() {
    super.onStart();
    mUtil.onStart(this);
  }
  
  @Override
  public void onStop() {
    super.onStop();
    mUtil.onStop();
    webView.clearCache(true);
  }
  
  @Override
  public void onResume() {
    super.onResume();
    mUtil.onResume();
  }

  @Override
  public void onPause() {
    super.onPause();
    mUtil.onPause();
  }
  
  public void handleReceivedPacket(AbstractPacket reply) {
    
  }

  String getUrl() {
    return URLUtil.guessUrl(urlView.getText().toString());
  }
  
  void initializeUi() {
    progressView = findViewById(R.id.progress);
    goButton = (Button) findViewById(R.id.web_browser_go);
    goButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        webView.loadUrl(getUrl());
      }
    });

    Button button = (Button) findViewById(R.id.web_browser_launch);
    button.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        mUtil.send(new LaunchUrlPacket(getUrl()));
        webView.loadUrl(getUrl());
      }
    });
    
    webView.setOnTouchListener(new View.OnTouchListener() {
      public boolean onTouch(View v, MotionEvent event) {
        v.requestFocusFromTouch();
        return false;
      }
    });
    
    webView.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        webView.requestFocus();
      }
    });
  }
  
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
      if (webView.canGoBack()) {
        webView.goBack();
      } else {
        finish();
      }
      return true;
    }
    return false;
  }
}