WebView线性进度条

参考：http://www.cnblogs.com/hubli/p/4835549.html

效果图：

images/loading.gif' data-original="http://images2015.cnblogs.com/blog/771964/201601/771964-20160119191929562-954829741.png" />

1.wevbview_progressbar.

<layer-list android="http://schemas.android.com/apk/res/android" >
  <!-- 背景 -->
  <item android:id="@android:id/background">
    <shape>
      <solid android:color="@android:color/transparent" />
    </shape>
  </item>
  <!-- 进度条 -->
  <item android:id="@android:id/progress">
    <clip>
      <shape>
        <solid android:color="@android:color/holo_green_light" />
      </shape>
    </clip>
  </item>
</layer-list>

2.ProgressWebView.java

@SuppressWarnings("deprecation")
public class ProgressWebView extends WebView {
  private final static String TAG = ProgressWebView.class.getSimpleName();

  private ProgressBar progressBar;
  private Context context;

  public ProgressWebView(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.context = context;
    progressBar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal);
    progressBar.setLayoutParams(new AbsoluteLayout.LayoutParams(AbsoluteLayout.LayoutParams.MATCH_PARENT, 3, 0, 0));
    progressBar.setProgressDrawable(getResources().getDrawable(R.drawable.wevbview_progressbar));
    addView(progressBar);
    setWebChromeClient(new WebChromeClient());
  }

  public class WebChromeClient extends android.webkit.WebChromeClient {
    @Override
    public void onProgressChanged(WebView view, int newProgress) {
      Log.d(TAG, "newProgress" + newProgress);
      if (newProgress == 100) {
        progressBar.setVisibility(GONE);
      } else {
        if (progressBar.getVisibility() == GONE)
          progressBar.setVisibility(VISIBLE);
        progressBar.setProgress(newProgress);
      }
      super.onProgressChanged(view, newProgress);
    }

    // 处理javascript中的console.log
    @Override
    public boolean onConsoleMessage(ConsoleMessage cm){
      android.util.Log.d(TAG, "webview console " + cm.lineNumber() + " of " + cm.sourceId() + " : " + cm.message());
      return true;
    }

    // 处理javascript中的alert()
    @Override
    public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
      result.cancel();
      return true;
    }

  }

  @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);
  }
}

3.MainActivity.java

ProgressWebView webView = (ProgressWebView)findViewById(R.id.them_webview);

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("http://www.cnblogs.com/hubli/p/4835549.html");

4.activity_main.

<com.etoury.webviewprogress.ProgressWebView
       android:id="@+id/them_webview"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />

原标题：WebView线性进度条

关键词：web