WebView的简单使用

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.webview.MainActivity">

    <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />
</RelativeLayout>

package com.example.webview;

import android.app.ProgressDialog;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {
private String url="http://2014.qq.com/";
    private WebView webView;
    private ProgressDialog progressDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        Uri uri=Uri.parse(url);
//        Intent intent=new Intent(Intent.ACTION_VIEW,uri);
//        startActivity(intent);
        webView= (WebView) findViewById(R.id.webview);
//        webView.loadUrl("file:///android_layout/layout.xml");
        webView.loadUrl("http://www.baidu.com");
        WebSettings webSettings=webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webView.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                if(newProgress==100)
                {
                    closeDialog();
                }
                else{
                    openDialog(newProgress);
                }
            }
        });
//        webView.setWebViewClient(new WebViewClient(){
//            @Override
//            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
//                view.loadUrl(url);
//                return true;
//            }
//        });
    }

    private void closeDialog() {
        if(progressDialog!=null&&progressDialog.isShowing())
        {
            progressDialog.dismiss();
            progressDialog=null;
        }
    }

    private void openDialog(int newProgress) {
        if(progressDialog==null)
        {

            progressDialog=new ProgressDialog(MainActivity.this);
            progressDialog.setTitle("正在加载");
            progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            progressDialog.setProgress(newProgress);
            progressDialog.show();
        }
        else
        {
            progressDialog.setProgress(newProgress);
        }
    }
}