BrowserWebFragment.java

package org.qii.weiciyuan.ui.browser;

import org.qii.weiciyuan.R;
import org.qii.weiciyuan.dao.shorturl.Mid2IdDao;
import org.qii.weiciyuan.support.error.WeiboException;
import org.qii.weiciyuan.support.file.FileManager;
import org.qii.weiciyuan.support.lib.MyAsyncTask;
import org.qii.weiciyuan.support.utils.GlobalContext;
import org.qii.weiciyuan.support.utils.Utility;
import org.qii.weiciyuan.ui.common.CommonProgressDialogFragment;
import org.qii.weiciyuan.ui.userinfo.UserInfoActivity;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.webkit.WebChromeClient;
import android.webkit.WebIconDatabase;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.ShareActionProvider;
import android.widget.Toast;

import java.lang.ref.WeakReference;

/**
 * User: qii
 * Date: 13-2-19
 */
public class BrowserWebFragment extends Fragment {

    private WebView mWebView;
    private ProgressBar mProgressBar;

    private boolean mIsWebViewAvailable;

    private String mUrl = null;

    private ShareActionProvider mShareActionProvider;
    private MenuItem refreshItem;

    public BrowserWebFragment() {
        super();
    }

    public BrowserWebFragment(String url) {
        super();
        mUrl = url;
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString("mUrl", mUrl);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
        setRetainInstance(true);
        /**
         *some devices for example Nexus 7 4.2.2 version will receive website favicon, but some
         * devices may cant, Galaxy Nexus 4.2.2 version
         */
        String path = FileManager.getWebViewFaviconDirPath();
        if (!TextUtils.isEmpty(path)) {
            WebIconDatabase.getInstance().open(FileManager.getWebViewFaviconDirPath());
        }
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (savedInstanceState != null) {
            mUrl = savedInstanceState.getString("mUrl");
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.browserwebfragment_layout, container, false);
        if (mWebView != null) {
            mWebView.destroy();
        }
        mWebView = (WebView) view.findViewById(R.id.webView);
        mProgressBar = (ProgressBar) view.findViewById(R.id.progressbar);
        mWebView.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
                    mWebView.goBack();
                    return true;
                }
                return false;
            }
        });
        mWebView.setWebViewClient(new InnerWebViewClient());
        mWebView.setWebChromeClient(new InnerWebChromeClient());
        mIsWebViewAvailable = true;
        WebSettings settings = mWebView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setBuiltInZoomControls(true);
        settings.setDisplayZoomControls(false);
        return view;
    }

    public void loadUrl(String url) {
        if (mIsWebViewAvailable) {
            getWebView().loadUrl(mUrl = url);
        } else {
            Log.w("ImprovedWebViewFragment",
                    "WebView cannot be found. Check the view and fragment have been loaded.");
        }
    }

    @Override
    public void onPause() {
        super.onPause();
        mWebView.onPause();
    }

    @Override
    public void onResume() {
        mWebView.onResume();
        super.onResume();
    }

    @Override
    public void onDestroyView() {
        mIsWebViewAvailable = false;
        super.onDestroyView();
    }

    @Override
    public void onDestroy() {
        if (mWebView != null) {
            mWebView.destroy();
            mWebView = null;
        }
        super.onDestroy();
    }

    public WebView getWebView() {
        return mIsWebViewAvailable ? mWebView : null;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.actionbar_menu_browserwebfragment, menu);
        MenuItem item = menu.findItem(R.id.menu_share);
        mShareActionProvider = (ShareActionProvider) item.getActionProvider();
        refreshItem = menu.findItem(R.id.menu_refresh);
        super.onCreateOptionsMenu(menu, inflater);

        if (Utility.isWeiboAccountDomainLink(mUrl)) {
            String result = Utility.getDomainFromWeiboAccountLink(mUrl);
            Intent intent = new Intent(getActivity(), UserInfoActivity.class);
            intent.putExtra("domain", result);
            getActivity().startActivity(intent);
            getActivity().finish();
        } else if (Utility.isWeiboMid(mUrl)) {
            String mid = Utility.getMidFromUrl(mUrl);
            RedirectLinkToWeiboIdTask task = new RedirectLinkToWeiboIdTask(
                    BrowserWebFragment.this, mUrl, mid);
            task.executeOnExecutor(MyAsyncTask.THREAD_POOL_EXECUTOR);
        } else {
            mWebView.loadUrl(mUrl);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_close:
                getActivity().finish();
                break;
            case R.id.menu_refresh:
                getWebView().reload();
                break;
            case R.id.menu_open_with_other_app:
                Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(mUrl));
                getActivity().startActivity(intent);
                break;
            case R.id.menu_copy:
                ClipboardManager cm = (ClipboardManager) getActivity()
                        .getSystemService(Context.CLIPBOARD_SERVICE);
                cm.setPrimaryClip(ClipData.newPlainText("sinaweibo", buildShareCopyContent()));
                Toast.makeText(getActivity(), getString(R.string.copy_successfully),
                        Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_share:
                Utility.setShareIntent(getActivity(), mShareActionProvider,
                        buildShareCopyContent());
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    private String buildShareCopyContent() {
        String title = mWebView.getTitle();
        String url = mWebView.getUrl();
        if (!TextUtils.isEmpty(title) && !TextUtils.isEmpty(url)) {
            return title + " " + url;
        } else {
            return mUrl;
        }
    }

    private void startRefreshAnimation() {
        LayoutInflater inflater = (LayoutInflater) getActivity()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ImageView iv = (ImageView) inflater.inflate(R.layout.refresh_action_view, null);
        Animation rotation = AnimationUtils.loadAnimation(getActivity(), R.anim.refresh);
        iv.startAnimation(rotation);
        finishRefreshAnimation();
        refreshItem.setActionView(iv);
    }

    private void finishRefreshAnimation() {
        if (refreshItem.getActionView() != null) {
            refreshItem.getActionView().clearAnimation();
            refreshItem.setActionView(null);
        }
    }

    private class InnerWebViewClient extends WebViewClient {

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (Utility.isWeiboAccountDomainLink(url)) {
                String result = Utility.getDomainFromWeiboAccountLink(url);
                Intent intent = new Intent(getActivity(), UserInfoActivity.class);
                intent.putExtra("domain", result);
                getActivity().startActivity(intent);
                getActivity().finish();
                return true;
            } else if (Utility.isWeiboMid(url)) {
                String mid = Utility.getMidFromUrl(url);
                RedirectLinkToWeiboIdTask task = new RedirectLinkToWeiboIdTask(
                        BrowserWebFragment.this, url, mid);
                task.executeOnExecutor(MyAsyncTask.THREAD_POOL_EXECUTOR);
                return true;
            } else {
                view.loadUrl(url);
                return true;
            }
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            if (getActivity() == null) {
                return;
            }
            startRefreshAnimation();
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            if (getActivity() == null) {
                return;
            }
            ActionBar actionBar = getActivity().getActionBar();
            if (actionBar == null) {
                return;
            }
            if (!TextUtils.isEmpty(view.getTitle())) {
                actionBar.setTitle(view.getTitle());
            }
            finishRefreshAnimation();
        }
    }

    private class InnerWebChromeClient extends WebChromeClient {

        @Override
        public void onReceivedTitle(WebView view, String sTitle) {
            super.onReceivedTitle(view, sTitle);
            if (sTitle != null && sTitle.length() > 0) {
                if (getActivity() == null) {
                    return;
                }
                ActionBar actionBar = getActivity().getActionBar();
                if (actionBar == null) {
                    return;
                }
                if (!TextUtils.isEmpty(view.getTitle())) {
                    actionBar.setTitle(view.getTitle());
                }
            }
        }

        //website icon is too small
        @Override
        public void onReceivedIcon(WebView view, Bitmap icon) {
            super.onReceivedIcon(view, icon);
            if (getActivity() == null) {
                return;
            }
//            getActivity().getActionBar().setIcon(new BitmapDrawable(getActivity().getResources(), icon));
        }

        public void onProgressChanged(WebView view, int progress) {
            if (getActivity() == null) {
                return;
            }
            if (!mProgressBar.isShown()) {
                mProgressBar.setVisibility(View.VISIBLE);
            }
            mProgressBar.setProgress(progress);
            if (progress == 100) {
                mProgressBar.setVisibility(View.INVISIBLE);
            }
        }
    }

    private static class RedirectLinkToWeiboIdTask extends MyAsyncTask<Void, Void, String> {

        private String mid;
        private String oriUrl;
        private WeakReference<BrowserWebFragment> webFragmentWeakReference;
        private CommonProgressDialogFragment commonProgressDialogFragment;
        private String progressStr;

        public RedirectLinkToWeiboIdTask(BrowserWebFragment webFragment, String oriUrl,
                String mid) {
            this.oriUrl = oriUrl;
            this.mid = mid;
            this.progressStr = webFragment.getString(R.string.converting_weibo_link);
            this.webFragmentWeakReference = new WeakReference<BrowserWebFragment>(webFragment);
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            BrowserWebFragment webFragment = webFragmentWeakReference.get();

            if (webFragment == null) {
                return;
            }

            Activity activity = webFragment.getActivity();

            if (activity == null) {
                return;
            }

            commonProgressDialogFragment = CommonProgressDialogFragment.newInstance(progressStr);
            commonProgressDialogFragment
                    .show(((FragmentActivity) activity).getSupportFragmentManager(), "dialog");
        }

        @Override
        protected String doInBackground(Void... params) {
            try {
                return new Mid2IdDao(GlobalContext.getInstance().getSpecialToken(), mid).getId();
            } catch (WeiboException e) {
                return "0";
            }
        }

        @Override
        protected void onPostExecute(String id) {
            super.onPostExecute(id);
            BrowserWebFragment webFragment = webFragmentWeakReference.get();

            if (webFragment == null) {
                return;
            }

            Activity activity = webFragment.getActivity();
            if (activity == null) {
                return;
            }

            commonProgressDialogFragment.dismissAllowingStateLoss();

            if (Long.valueOf(id) > 0L) {
                webFragment.startActivity(BrowserWeiboMsgActivity.newIntent(id,
                        GlobalContext.getInstance().getSpecialToken()));
                activity.finish();
            } else {
                Toast.makeText(GlobalContext.getInstance(), R.string.cant_not_convert_to_weibo_id,
                        Toast.LENGTH_SHORT).show();
                webFragment.mWebView.loadUrl(oriUrl);
            }
        }
    }
}