Android实现带进度条的WebView

在加载H5页面的时候，可能由于网络、页面内容复杂度等原因，导致加载过程出现空白，加上进度条可以有效提高用户体验

一、自定义ProgressWebView类

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,
 5, 0, 0));
    Drawable drawable = context.getResources().getDrawable(R.drawable.progress_bar_states);
    progressbar.setProgressDrawable(drawable);
    addView(progressbar);
    // setWebViewClient(new WebViewClient(){});
    setWebChromeClient(new WebChromeClient());
    //是否可以缩放
    getSettings().setSupportZoom(true);
    getSettings().setBuiltInZoomControls(true);
  }

  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);
  }
}

二、布局文件标签写成自定义的类，使用和一般WebView一致

最后贴一下drawable下的progress_bar_states

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。