android.kostalms.fragment.WebViewFragment.java Source code

Introduction

Here is the source code for android.kostalms.fragment.WebViewFragment.java

Source

/*******************************************************************************
 * Copyright 2012 Steven Rudenko
 * 
 * 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 android.kostalms.fragment;

import android.annotation.SuppressLint;
import android.kostalms.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

public class WebViewFragment extends Fragment {
    public final static String TAG = WebViewFragment.class.getSimpleName();

    private WebView viewContentWebView;
    private String url;

    private boolean resetHistory = true;

    @SuppressLint("SetJavaScriptEnabled")
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        // xml   .
        final View v = inflater.inflate(R.layout.webview, container, false);

        // viewContentProgress has a
        final ProgressBar viewContentProgress = (ProgressBar) v.findViewById(R.id.progress);

        // viewContentWebView has a
        viewContentWebView = (WebView) v.findViewById(R.id.webview);
        viewContentWebView.getSettings().setJavaScriptEnabled(true);
        viewContentWebView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return super.shouldOverrideUrlLoading(view, url);
            }
        });

        // WebChromeClient    .
        viewContentWebView.setWebChromeClient(new WebChromeClient() {

            //    
            @Override
            public void onProgressChanged(WebView view, int newProgress) {

                // viewContentProgress set
                viewContentProgress.setProgress(newProgress);

                // 100   .    .
                viewContentProgress.setVisibility(newProgress == 100 ? View.GONE : View.VISIBLE);

                //      url   ?
                //     .
                if (newProgress == 100 && resetHistory) {
                    viewContentWebView.clearHistory();
                    resetHistory = false;
                }
            }
        });
        return v;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        reload();
    }

    @Override
    public void onHiddenChanged(boolean hidden) {
        super.onHiddenChanged(hidden);
        if (hidden)
            viewContentWebView.stopLoading();
        else
            reload();
    }

    //      
    public void setUrl(String url) {
        this.url = url;

        if (viewContentWebView != null)
            viewContentWebView.stopLoading();

        resetHistory = true;
    }

    public void reload() {
        // String null     
        //  return
        if (TextUtils.isEmpty(url))
            return;

        viewContentWebView.loadUrl(url);
    }

    //    (   )  .
    public boolean onBackPressed() {
        if (viewContentWebView.canGoBack()) {
            viewContentWebView.goBack();
            return true;
        }
        return false;
    }
}