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android webview无网络情况下的处理

2015-12-05 11:50 549 查看 
import com.yck.utils.diy.LoadingDialog;
import com.yck.utils.net.HttpUrl;
import com.yck.utils.tools.MyLog;

import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import cn.ijgc.goldplus.MyApplication;
import cn.ijgc.goldplus.R;
import cn.ijgc.goldplus.finance.ui.FinanceNxbIntroduceActivity;

public class DiscoverInformationFragment extends Fragment {

private static final String TAG = FinanceNxbIntroduceActivity.class.getSimpleName();
private String errorHtml = "";
WebView webView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.discover_information, container, false);
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
errorHtml = "<html><body><h1></h1></body></html>";

webView = (WebView) getView().findViewById(R.id.web_include_webview);
webView.getSettings().setDefaultTextEncodingName("UTF-8");
webView.getSettings().setJavaScriptEnabled(true);
initWebView();
webView.loadUrl(HttpUrl.appInfo);
}

private void initWebView() {
// 设置WebView属性，能够执行JavaScript脚本
webView.getSettings().setJavaScriptEnabled(true);
// 设置不要缓存
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
// 如果要播放Flash，需要加上这一句
// webView.getSettings().setPluginsEnabled(true);

WebSettings ws = webView.getSettings();
ws.setSupportZoom(true); // 设置可以支持缩放
// ws.setUseWideViewPort(true);
ws.setLoadWithOverviewMode(true);
webView.setWebViewClient(new MyWebViewClient());
}

class MyWebViewClient extends WebViewClient {

@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
MyLog.e(TAG, "shouldOverrideUrlLoading");
//view.loadUrl(url);
return super.shouldOverrideUrlLoading(view, url);
//return  true;
}

@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
MyLog.e(TAG, "onPageStarted");
super.onPageStarted(view, url, favicon);
//showLoadingDialog();
}

@Override
public void onPageFinished(WebView view, String url) {
MyLog.e(TAG, "onPageFinished");
//closeLoadingDialog();
super.onPageFinished(view, url);
}

@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
view.loadData(errorHtml, "UTF-8", "text/html");
}
}

/**
* 关闭进度条
*/
public void closeLoadingDialog() {
if (loadDialog != null) {
loadDialog.dismiss();
}
}

/**
* 加载进度条
*/
LoadingDialog loadDialog = null;

public void showLoadingDialog() {
if (loadDialog == null && this.getActivity() != null && !this.getActivity().isFinishing()) {
loadDialog = new LoadingDialog(getActivity());
loadDialog.setInverseBackgroundForced(false);
loadDialog.setCanceledOnTouchOutside(false);
loadDialog.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
dialog.dismiss();
MyApplication.getInstance().cancelPendingRequests(TAG);
}
});
}
if(loadDialog != null){
loadDialog.show();
}
}
}
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