WebView的简单使用

ゝ一世哀愁。 2022-07-15 01:52 179阅读 0赞

<?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);
            }
        }
    }