webview设置加载进度条、屏蔽跳转到默认浏览器、对话框

package cn.itcast.design.note5.webview;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import cn.itcast.design.R;

public class MyWebViewActivity extends Activity {

public void load(View view) {
// ③　指定 地址
// webView.loadUrl(访问地址);
// webView.loadUrl("file:///android_asset/html/pritection_help.html");
// webView.loadUrl("http://192.168.18.23:8080/web/html/protection_help.html");
// ④　传入 源代码字符串
// webView.loadData(源代码字符串, 网络媒体类型 image/png image/jeg, 编码);
// try {
// InputStream input = getAssets().open("help.html");
// byte[] data = StreamUtil.readInputStream(input);
// webView.loadData(new String(data, "UTF-8"), "text/html", "UTF-8");
// } catch (Exception e) {
// e.printStackTrace();
// }

// 实时获取进度载入变化的辅助类
WebChromeClient client1 = new WebChromeClient() {
// 回调函数:条件 进度发生改变的时候调用 newProgress 最新进度
@Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
System.out.println("onProgressChanged " + newProgress);
if (newProgress == 100) {
progress.setVisibility(View.GONE);
} else {
progress.setVisibility(View.VISIBLE);
progress.setProgress(newProgress);
}

}

};
webView.setWebChromeClient(client1);

// 辅助类二 WebViewClient
WebViewClient client2 = new WebViewClient() {

// 回调函数:条件 0
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
dialog = new ProgressDialog(MyWebViewActivity.this);
dialog.setTitle("传智浏览器");
dialog.setMessage("正在拼命加载中...");
dialog.show();
}

// 回调函数:条件 100
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
dialog.dismiss();
dialog = null;
}

};
webView.setWebViewClient(client2);

webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.loadUrl("http://192.168.18.23:8080/");

// ①　布局progressBar 100 0--100
// ②　获取进度值 载入多少显示多少
// progress.setProgress(progress)

}

private ProgressDialog dialog = null;

private WebView webView = null;

private ProgressBar progress;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);

// ①　创建 Activity
// ②　布局Layout --WebView
setContentView(R.layout.activity_webview);
webView = (WebView) findViewById(R.id.webview);
progress = (ProgressBar) findViewById(R.id.progress);

}
}