带进度条的webview

2018-01-29 14:43:57 浏览数 (1)

     如果不使用系统自带的TitleBar(即Activity被设置@android:style/Theme.NoTitleBar),那就需要自己来写进度条了,这里封装了一个自定义控件和加载网页的公共Activity,方便使用。

正文

一、截图

二、自定义控件

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/**

 * 带进度条的WebView

 * @author 农民伯伯

 * @see http://www.cnblogs.com/over140/archive/2013/03/07/2947721.html

 *

 */

@SuppressWarnings("deprecation")

public class ProgressWebView extends WebView {

    private ProgressBar progressbar;

    public ProgressWebView(Context context, AttributeSet attrs) {

        super(context, attrs);

        progressbar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal);

        progressbar.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 3, 0, 0));

        addView(progressbar);

        //        setWebViewClient(new WebViewClient(){});

        setWebChromeClient(new WebChromeClient());

    }

    public class WebChromeClient extends android.webkit.WebChromeClient {

        @Override

        public void onProgressChanged(WebView view, int newProgress) {

            if (newProgress == 100) {

                progressbar.setVisibility(GONE);

            } else {

                if (progressbar.getVisibility() == GONE)

                    progressbar.setVisibility(VISIBLE);

                progressbar.setProgress(newProgress);

            }

            super.onProgressChanged(view, newProgress);

        }

    }

    @Override

    protected void onScrollChanged(int l, int t, int oldl, int oldt) {

        LayoutParams lp = (LayoutParams) progressbar.getLayoutParams();

        lp.x = l;

        lp.y = t;

        progressbar.setLayoutParams(lp);

        super.onScrollChanged(l, t, oldl, oldt);

    }

}

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三、加载网页的公共Activity

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/**

 * 加载网页的Activity

 *

 * @author 农民伯伯

 * @see http://www.cnblogs.com/over140/archive/2013/03/07/2947721.html

 *

 */

public class WebActivity extends BaseActivity {

    private ProgressWebView webview;

    private String url;

    private String name;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.commom_web);

        // ~~~ 获取参数

        url = getIntent().getStringExtra("url");

        name = getIntent().getStringExtra("name");

        // ~~~ 绑定控件

        webview = (ProgressWebView) findViewById(R.id.webview);

        // ~~~ 设置数据

        titleText.setText(name);

        webview.getSettings().setJavaScriptEnabled(true);

        webview.setDownloadListener(new DownloadListener() {

            @Override

            public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {

                if (url != null && url.startsWith("http://"))

                    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));

            }

        });

        webview.loadUrl(url);

    }

}

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commom_web.xml

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <include layout="@layout/include_title" />

    <com.nmbb.ui.widget.ProgressWebView

        android:id="@ id/webview"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent" />

</LinearLayout>

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四、补充说明

1、还可以再优化一下,在标题栏加一个刷新按钮。

2、如果加载的页面有需要下载文件,需要设置setDownloadListener方法,根据项目实际需求定制。

3、自定义控件是在转载的,忘记出处,感谢~~

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