WebView使用

WebView使用:

/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 在标题栏上显示进度
        getWindow().requestFeature(Window.FEATURE_PROGRESS);

        // 定义WebView
        webview = new WebView(this);
        setContentView(webview);

        // 滚动条风格
        webview.setScrollBarStyle(0);

        // 设置JS可用
        webview.getSettings().setJavaScriptEnabled(true);

        final Activity activity = this;

        /*
         * WebChromeClient类:用来辅助WebView处理JavaScript的对话框,网站图标,网站Title,加载进度等
         * 通过setWebChromeClient调协WebChromeClient类
         */
        webview.setWebChromeClient(new WebChromeClient() {
            // 加载进度中,100时停止
            public void onProgressChanged(WebView view, int progress) {
                activity.setProgress(progress * 100);
            }

            @Override
            public void onReceivedTitle(WebView view, String title) {
                activity.setTitle(title);
            }

        });

        /*
         * WebViewClient类: 用来辅助WebView处理各种通知,请求等事件的类
         * 通过setWebViewClient设置WebViewClient类
         */
        webview.setWebViewClient(new WebViewClient() {
            // 页面加载失败
            public void onReceivedError(WebView view, int errorCode,
                    String description, String failingUrl) {
                Toast.makeText(activity, "异常:! " + description,
                        Toast.LENGTH_LONG).show();
            }

        });
        webview.loadUrl(Url);

    }

    /*
     * 通过WebView的goBack(),goForward()方法设置其前进和后退
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if (keyCode == KeyEvent.KEYCODE_BACK && webview.canGoBack()) {
            // 返回前一个页面
            webview.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
</LinearLayout>

添加权限:

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

 

转载至：http://www.cnblogs.com/jdsjlzx/archive/2011/07/25/2116355.html

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