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Java Source Code
/*
* Copyright 2011 Google Inc./*fromwww.java2s.com*/
*
* 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.google.android.apps.iosched.ui;
import com.google.android.apps.iosched.R;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
/**
* A {@link WebView}-based fragment that shows Google Realtime Search results for a given query,
* provided as the {@link TagStreamFragment#EXTRA_QUERY} extra in the fragment arguments. If no
* search query is provided, the conference hashtag is used as the default query.
*/publicclass TagStreamFragment extends Fragment {
privatestaticfinal String TAG = "TagStreamFragment";
publicstaticfinal String EXTRA_QUERY = "com.google.android.iosched.extra.QUERY";
publicstaticfinal String CONFERENCE_HASHTAG = "#io2011";
private String mSearchString;
private WebView mWebView;
private View mLoadingSpinner;
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent intent = BaseActivity.fragmentArgumentsToIntent(getArguments());
mSearchString = intent.getStringExtra(EXTRA_QUERY);
if (TextUtils.isEmpty(mSearchString)) {
mSearchString = CONFERENCE_HASHTAG;
}
if (!mSearchString.startsWith("#")) {
mSearchString = "#" + mSearchString;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_webview_with_spinner, null);
// For some reason, if we omit this, NoSaveStateFrameLayout thinks we are
// FILL_PARENT / WRAP_CONTENT, making the progress bar stick to the top of the activity.
root.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.FILL_PARENT));
mLoadingSpinner = root.findViewById(R.id.loading_spinner);
mWebView = (WebView) root.findViewById(R.id.webview);
mWebView.setWebViewClient(mWebViewClient);
mWebView.post(new Runnable() {
publicvoid run() {
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(false);
try {
mWebView.loadUrl(
"http://www.google.com/search?tbs="
+ "mbl%3A1&hl=en&source=hp&biw=1170&bih=668&q="
+ URLEncoder.encode(mSearchString, "UTF-8")
+ "&btnG=Search");
} catch (UnsupportedEncodingException e) {
Log.e(TAG, "Could not construct the realtime search URL", e);
}
}
});
return root;
}
publicvoid refresh() {
mWebView.reload();
}
private WebViewClient mWebViewClient = new WebViewClient() {
@Override
publicvoid onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
mLoadingSpinner.setVisibility(View.VISIBLE);
mWebView.setVisibility(View.INVISIBLE);
}
@Override
publicvoid onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
mLoadingSpinner.setVisibility(View.GONE);
mWebView.setVisibility(View.VISIBLE);
}
@Override
publicboolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("javascript")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
};
}