WebView网络加载

来源：互联网发布：centos 没有桌面编辑：程序博客网时间：2024/06/05 12:31
package com.baweinewstoday.activity;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.KeyEvent;import android.view.Menu;import android.view.View;import android.webkit.WebChromeClient;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import android.widget.ProgressBar;import com.baweinewstoday.R;public class WebActivity extends AppCompatActivity {    private Button bt_back;    private ProgressBar pb;    private WebView web;    private String url;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_web);        Intent intent = getIntent();        url = intent.getStringExtra("url");        initView();        setwebView();    }    //设置webview    private void setwebView() {        WebSettings webSettings = web.getSettings();        //设置WebView属性，能够执行Javascript脚本        webSettings.setJavaScriptEnabled(true);        //设置可以访问文件        webSettings.setAllowFileAccess(true);        //设置支持缩放        webSettings.setBuiltInZoomControls(true);        //加载需要显示的网页        web.loadUrl(url);        web.setWebViewClient(new webViewClient ());        web.setWebChromeClient(new WebChromeClient(){            @Override            public void onReceivedTitle(WebView view, String title) {                super.onReceivedTitle(view, title);            }            @Override            public void onProgressChanged(WebView view, int newProgress) {                super.onProgressChanged(view, newProgress);                pb.setProgress(newProgress);            }        });        web.setWebViewClient(new WebViewClient(){            @Override            public void onPageFinished(WebView view, String url) {                super.onPageFinished(view, url);                pb.setVisibility(View.INVISIBLE);            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu)    {        // Inflate the menu; this adds items to the action bar if it is present.        return true;    }    @Override    //设置回退    //覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法    public boolean onKeyDown(int keyCode, KeyEvent event) {        if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {            web.goBack(); //goBack()表示返回WebView的上一页面            return true;        }        finish();//结束退出程序        return false;    }    //Web视图    private class webViewClient extends WebViewClient {        public boolean shouldOverrideUrlLoading(WebView view, String url) {            view.loadUrl(url);            return true;        }    }    private void initView() {        bt_back = (Button) findViewById(R.id.bt_back);        pb = (ProgressBar) findViewById(R.id.pb);        web = (WebView) findViewById(R.id.web);        bt_back.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                finish();            }        });    }}
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