android笔记之在WebView中显示ProgressBar的两种方法

  次阅读 来源:互联网(转载协议) 2015-10-03 10:55 我要评论(0)

,这种方法只能将进度情况显示到标题栏中。英文是本文作者的一段唠叨,很简单,我就不用再翻译了吧。

When using the webview, something that drives me crazy, specially if you are in a place with a very slow internet connection, is not knowing what is happening with the webpage, is it loading? Is it stuck?. AAAhhhh Nothing is happening. Ok don t desperate, I am going to show you how to add a progress bar to your Webview layout in you app.

After you know what to do is easy (As always).

// Sets the Chrome Client, and defines the onProgressChanged

// This makes the Progress bar be updated.

final Activity MyActivity = this;

mWebView.setWebChromeClient(new WebChromeClient() {

public void onProgressChanged(WebView view, int progress)

{

//Make the bar disappear after URL is loaded, and changes string to Loading...

MyActivity.setTitle("Loading...");

MyActivity.setProgress(progress * 100); //Make the bar disappear after URL is loaded

// Return the app name after finish loading

if(progress == 100)

MyActivity.setTitle(R.string.app_name);

}

});

// Adds Progrss bar Support

this.getWindow().requestFeature(Window.FEATURE_PROGRESS);

setContentView(R.layout.main );

// Makes Progress bar Visible

getWindow().setFeatureInt( Window.FEATURE_PROGRESS, Window.PROGRESS_VISIBILITY_ON);

package firsrdroid.tutorial.mywebview;

import android.app.Activity;

import android.os.Bundle;

import android.view.Window;

import android.webkit.WebChromeClient;

import android.webkit.WebView;

public class UsingMyWebview extends Activity {

WebView mWebView;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

// Adds Progrss bar Support

this.getWindow().requestFeature(Window.FEATURE_PROGRESS);

setContentView(R.layout.main );

// Makes Progress bar Visible

getWindow().setFeatureInt( Window.FEATURE_PROGRESS, Window.PROGRESS_VISIBILITY_ON);

// Get Web view

mWebView = (WebView) findViewById( R.id.MyWebview ); //This is the id you gave

//to the WebView in the main.xml

mWebView.getSettings().setJavaScriptEnabled(true);

mWebView.getSettings().setSupportZoom(true);//Zoom Control on web (You don't need this

//if ROM supports Multi-Touch

mWebView.getSettings().setBuiltInZoomControls(true); //Enable Multitouch if supported by ROM

// Load URL

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