Android Open Source - retrowatch Retro Web View Activity

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright (C) 2014 The Retro Watch - Open source smart watch project
 */*from w ww.  j ava2s  .c  om*/
 * 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 com.hardcopy.retrowatchle;

import com.hardcopy.retrowatchle.contents.objects.CPObject;
import com.hardcopy.retrowatchle.service.RetroWatchService;
import com.hardcopy.retrowatchle.utils.RecycleUtils;

import android.app.ActionBar;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Bundle;
import android.os.IBinder;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

public class RetroWebViewActivity extends Activity implements OnClickListener {
  
  // Global
  public static final String tag = "RetroWebViewActivity";
  
  // Context, System
  private Context mContext;
  private RetroWatchService mService;
  
  private IWebViewListener mWebViewListener;
  
  // Layout
  //----- Web view
  private RetroWebView mWebView;
  private ProgressBar mProgressLoading = null;
  private EditText mEditURL = null;
  private Button mBtnGoURL = null;
  
  
  /*****************************************************
  *    Overrided methods
  ******************************************************/
  @Override
  public void onCreate(Bundle savedInstanceState) 
  {
    super.onCreate(savedInstanceState);

    //----- System, Context
    mContext = getApplicationContext();
    mWebViewListener = new WebViewListenerImpl();
    
    doBindService();
    
    //----- Layout
    final ActionBar actionBar = getActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);
    
    setContentView(R.layout.activity_web_view);
    
    mProgressLoading = (ProgressBar)this.findViewById(R.id.progress_loading);
    mEditURL = (EditText) this.findViewById(R.id.edit_url);
    mBtnGoURL = (Button) this.findViewById(R.id.btn_go_url);
    mBtnGoURL.setOnClickListener(this);
    
    mWebView = new RetroWebView();
    WebView webview = (WebView) this.findViewById(R.id.layout_webview);
    mWebView.setParametersForInit(webview, mProgressLoading, mEditURL);  // This method must be called first
    mWebView.initialize(mContext, mWebViewListener);
    
    //----- Initialize data, settings
    Intent i = getIntent();
    Uri uri = i.getData();
    String url = uri.toString();
    if(url != null && !url.isEmpty()) {
      openURL(url);
    }
    clearHistory();
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // getMenuInflater().inflate(R.menu.activity_wev_view, menu);
    return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()) {
    case android.R.id.home:
      onBackPressed();
      break;
    default:
      return super.onOptionsItemSelected(item);
    }
    return true;
  }
  
  @Override
  public void onConfigurationChanged(Configuration newConfig){
    super.onConfigurationChanged(newConfig);
  }
  
  @Override
  public void onDestroy() {
    super.onDestroy();
    finalizeActivity();
  }
  
  @Override
  public void onLowMemory (){    // onDestroy is not always called when applications are finished by Android system.
    super.onLowMemory();
    finalizeActivity();
  }
  
  
  private void openURL(String url) {
    mWebView.actionLoadURL(url);
  }
  
  private void clearHistory() {
    mWebView.clearHistory();
  }
  
  @Override
  public void onClick(View v) {
    switch(v.getId()) {
    case R.id.btn_go_url:
      openURL("");
      break;
    }
  }
  
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
      if(mWebView.getWebViewInstance().canGoBack()) {
        mWebView.getWebViewInstance().goBack();
      } else {
        onBackPressed();
      }
      return true;
    }
    return false;
  }
  
  
  /*****************************************************
  *    Private methods
  ******************************************************/
  public void goToMainActivity() {
    Intent i = new Intent(this, RetroWatchActivity.class);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
    startActivity(i);
    finish();
  }  
  
  private void finalizeActivity() {
    doStopService();
    if(mWebView != null) {
      mWebView.finalize();
      mWebView = null;
    }
    RecycleUtils.recursiveRecycle(getWindow().getDecorView());
  }
  
  private void doBindService() {
    bindService( new Intent( this , RetroWatchService.class ), mServiceConn, Context.BIND_AUTO_CREATE);
  }
  
  private void doStopService() {
    unbindService(mServiceConn);
  }
  
  private static final int TOAST_DISPLAY_TIME = 2000;
  private boolean insertCPSetting(CPObject cp) {
    if(cp == null || mService == null) 
      return false;

    int _id = mService.addRss(cp);
    if(_id > -1) {
      Toast.makeText(mContext, "1 " + mContext.getResources().getString(R.string.msg_rss_update_success), TOAST_DISPLAY_TIME).show();
    } else {
      Toast.makeText(mContext, "1 " + mContext.getResources().getString(R.string.warning_error_while_adding_rss), TOAST_DISPLAY_TIME).show();
      return false;
    }
    return true;
  }
  
  
  /*****************************************************
  *    Private classes
  ******************************************************/
  
  //---------------------------------------------------------------------
  //  Service connection
  //---------------------------------------------------------------------
  private ServiceConnection mServiceConn = new ServiceConnection() 
  {
    public void onServiceConnected(ComponentName className, IBinder binder) {
      mService = ((RetroWatchService.RetroWatchServiceBinder) binder).getService();
    }

    public void onServiceDisconnected(ComponentName className) {
      mService = null;
    }
  };
  
  //---------------------------------------------------------------------
  //  Listeners
  //---------------------------------------------------------------------
  class WebViewListenerImpl implements IWebViewListener 
  {
    public static final int SETTINGS_FEED_DEFAULT_VISIBLE_COUNT = 20;
    public static final int SETTINGS_FEED_DEFAULT_REFRESH_TIME = 60;      // in minutes
    public static final int SETTINGS_FEED_MAX_TITLE_LEN = 256;
    public static final int SETTINGS_FEED_MAX_DESC_LEN = 256;
    public static final int SETTINGS_FEED_MAX_URL_LEN = 1024;
    
    @Override
    public void OnReceiveDialogEvent(int type, int arg0, String arg1, String arg2) 
    {
      switch(type)
      {
        default:
          break;
      }
    }  // End of OnReceiveMediaResult()
    
    @Override
    public void OnReceiveCallback(String id, int type, int arg0, String arg1, String arg2, String arg3, String arg4)
    {
      switch(type)
      {
        case IWebViewListener.WEBVIEW_CALLBACK_ADD_FEED:
          if(arg1==null || arg2==null || arg3==null) return;
          if(arg1.length() > SETTINGS_FEED_MAX_TITLE_LEN) arg1 = arg1.substring(0, SETTINGS_FEED_MAX_TITLE_LEN);
          if(arg2.length() > SETTINGS_FEED_MAX_DESC_LEN) arg1 = arg1.substring(0, SETTINGS_FEED_MAX_DESC_LEN);
          if(arg3.length() > SETTINGS_FEED_MAX_URL_LEN) arg1 = arg1.substring(0, SETTINGS_FEED_MAX_URL_LEN);
          
          CPObject cp = new CPObject();
          cp.mName = arg1;
          cp.mDescription = arg2;
          cp.mURL = arg3;
          cp.mVisibleCount = 20;
          cp.mCachingCount = 30;
          cp.mTTL = 2*60*60;
          
          // Insert to DB and mSettings
          insertCPSetting(cp);
          break;
        default:
          break;
      }
    }
    
  }  // End of class CallbackListener
  
  
  
  
  
  
}
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