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);

	}
}