Android单页面webview几点备忘

WebView显示某个网页时的几个点，允许js，设置缓存模式，新窗口打开拦截，后退键导航处理等等

    WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_detail);

        webView = (WebView)findViewById(R.id.webView);
        webView.getSettings().setJavaScriptEnabled(true);
        if (Build.VERSION.SDK_INT >= 19) {
            webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        }
        webView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                // TODO Auto-generated method stub
                view.loadUrl(url);
                return true;
            }
        });
        webView.loadUrl("http://www.liubaicai.net");

        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.hide();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if(keyCode== KeyEvent.KEYCODE_BACK)
        {
            if(webView.canGoBack())
            {
                webView.goBack();//返回上一页面
                return true;
            }
            else
            {
                System.exit(0);//退出程序
            }
        }
        return super.onKeyDown(keyCode, event);
    }

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