Android實現帶進度條的WebView

如果不使用系統自帶的TitleBar（即Activity被設置@android:style/Theme.NoTitleBar），那就需要自己來寫進度條了，這裡封裝了一個自定義控件和加載網頁的公共Activity，方便使用。

一、截圖

二、自定義控件

/**
 * 帶進度條的WebView
 * @author 農民伯伯
 * @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);
    }
}