public class MainActivity extends Activity {private WebView webView;private String url = "https://wap.baidu.com/";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();}public void initView() {webView = (WebView) findViewById(R.id.activity_webview);webView.requestFocus();webView.setHorizontalScrollBarEnabled(false);webView.setVerticalScrollBarEnabled(false);initWebView();}@SuppressWarnings("deprecation")@SuppressLint("SetJavaScriptEnabled")private void initWebView() {webView.getSettings().setJavaScriptEnabled(true);// 设置 缓存模式if (NetUtils.isNetworkAvailable(MainActivity.this)) {webView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);} else {webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);}// webView.getSettings().setBlockNetworkImage(true);// 把图片加载放在最后来加载渲染
        webView.getSettings().setRenderPriority(RenderPriority.HIGH);// 支持多窗口webView.getSettings().setSupportMultipleWindows(true);// 开启 DOM storage API 功能webView.getSettings().setDomStorageEnabled(true);// 开启 Application Caches 功能webView.getSettings().setAppCacheEnabled(true);onLoad();}@SuppressWarnings("deprecation")@SuppressLint("SetJavaScriptEnabled")public void onLoad() {try {webView.setWebViewClient(new WebViewClient() {@Overridepublic void onLoadResource(WebView view, String url) {Log.i("tag", "onLoadResource url=" + url); // 开始加载super.onLoadResource(view, url);}@Overridepublic boolean shouldOverrideUrlLoading(WebView webview,String url) {Log.i("tag", "intercept url=" + url);// 重写此方法表明点击网页里面的链接还是在当前的webview里跳转，不跳到浏览器那边
                    webview.loadUrl(url);return true;}@Overridepublic void onPageFinished(WebView view, String url) {String title = view.getTitle(); // 得到网页标题
Log.e("tag", "onPageFinished WebView title=" + title);}@Overridepublic void onReceivedError(WebView view, int errorCode,String description, String failingUrl) {Toast.makeText(getApplicationContext(), "加载错误",Toast.LENGTH_LONG).show();}});webView.loadUrl(url);} catch (Exception e) {return;}}@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) && webView.canGoBack()) {webView.goBack(); // goBack()表示返回WebView的上一页面return true;} else {finish();}}/**** 防止WebView加载内存泄漏*/@Overrideprotected void onDestroy() {super.onDestroy();webView.removeAllViews();webView.destroy();}}

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>