Question

这是我的第二项活动任何人都可以帮助我在加载网站时添加进度文本，加载后它应该停止，帮我把代码放在正确的位置，因为我不太了解java，我只是在学习

package com.example.jaisonjoseph.newsclient;

import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.app.Activity;
import android.support.design.widget.NavigationView;
import android.support.v7.widget.Toolbar;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

公共类Manorama扩展了Activity {

Toolbar toolbar=null;
public WebView mwebView;

    public static boolean isNetworkStatusAvialable (Context context) {
    ConnectivityManager connectivityManager = (ConnectivityManager)  
     context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivityManager != null)
    {
        NetworkInfo netInfos = connectivityManager.getActiveNetworkInfo();
        if(netInfos != null)
            if(netInfos.isConnected())
                return true;
    }
    return false;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_manorama);


    if(isNetworkStatusAvialable (getApplicationContext())) {
        WebView view=(WebView) findViewById(R.id.webView2);
        view.getSettings().setJavaScriptEnabled(true);
        view.setWebViewClient(new WebViewClient());


        view.loadUrl("http://manoramaonline.com");
    } else {
        WebView view1=(WebView) findViewById(R.id.webView2);
        view1.getSettings().setJavaScriptEnabled(true);
        view1.setWebViewClient(new WebViewClient());
        view1.loadUrl("file:///android_asset/index.html");
    }
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getAction()==KeyEvent.ACTION_DOWN)        {

        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                WebView webView = (WebView) findViewById(R.id.webView2);
                if (webView != null) {


                    if (webView.canGoBack()) {
                        webView.goBack();
                    } else {
                        finish();
                    }
                    return true;
                }

        }
    }
    return super.onKeyDown(keyCode, event);
  }


private class MyWebViewClient extends WebViewClient {
    ProgressBar bar=(ProgressBar)findViewById(R.id.progressBar);

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        return false;
    }

    @Override
    public void onPageStarted(final WebView view, final String url, final Bitmap favicon) {
        bar.setVisibility(View.VISIBLE);
        view.setVisibility(View.GONE);
        super.onPageStarted(view, url, favicon);
    }
    @Override
    public void onPageFinished(WebView view, String url) {
        bar.setVisibility(View.GONE);
        view.setVisibility(View.VISIBLE);
        super.onPageFinished(view, url);
       }
    }
 }

Answer 1

您应该设置WebViewClient以启动和完成监听页面加载。你可以这样做：

自定义WebViewClient：

private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        return false;
    }

    @Override
    public void onPageStarted(final WebView view, final String url, final Bitmap favicon) {
        progress.setVisibility(View.VISIBLE);
        webView.setVisibility(View.GONE);
        super.onPageStarted(view, url, favicon);
    }
    @Override
    public void onPageFinished(WebView view, String url) {
        progress.setVisibility(View.GONE);
        webView.setVisibility(View.VISIBLE);
        super.onPageFinished(view, url);
    }
}

将上述客户端设置为您的webView：

webView.setWebViewClient(new MyWebViewClient());

您还可以在ProgressBar下方添加TextView并设置其可见性。祝你好运。

我想在加载网站时显示进度文本

1 个答案: