WebActivity.java

package me.ele.app.amigo;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class WebActivity extends BaseActivity {

    private WebView webview;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_PROGRESS);
        setContentView(R.layout.activity_web);
        webview = (WebView) findViewById(R.id.web_view);

        webview.getSettings().setJavaScriptEnabled(true);
        final Activity activity = this;
        webview.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) {
                activity.setProgress(progress * 1000);
            }
        });
        webview.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode, String description, String
                    failingUrl) {
                Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
            }
        });
        webview.loadUrl("http://www.bing.com");
        Log.d("web_activity", "onCreate: ");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (webview != null) {
            webview.destroy();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((webview != null && keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
            webview.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
}