package www.jiusansec.cc.webviewdemo;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
/**
* @author ：程序员小冰：QQ986945193
*
* @新浪微博 ：http://weibo.com/mcxiaobing
*
* @version V1.0正式版
*
* @process
*
* @Note
*
* @dateTime ${date}${time}
*
* ${tags}
*/
/**
* WebView Demo练习
*
* 加载一个网页
*/
public class MainActivity extends AppCompatActivity {
private WebView webView;
private static final String url = "http://my.csdn.net/qq_21376985";
private ProgressDialog progressDialog;
/**
* 初始化控件
*/
private void assignViews() {
webView = (WebView) findViewById(R.id.web_view);
progressDialog = new ProgressDialog(MainActivity.this);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
assignViews();
}
/**
* 点击进行跳转
*/
public void showWebview(View view){
//获取websetings 设置
WebSettings settings = webView.getSettings();
settings.setSupportZoom(true);
//设置浏览器支持javaScript
settings.setJavaScriptEnabled(true);
//设置打开自带缩放按钮
settings.setBuiltInZoomControls(true);
// 进行跳转用户输入的url地址
webView.loadUrl(url);
webView.setWebChromeClient(new WebChromeClient() {
@Override
//速度正在改变
public void onProgressChanged(WebView view, int newProgress) {
progressDialog.setMessage("加载" + newProgress);
Log.d("1507", "5");
}
});
webView.setWebViewClient(new WebViewClient(){
@Override
// 显示读渠道的内容
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
Log.d("1507", "3");
return true;
}
/**
* 页面开始的时候 回调此方法
* @param view
* @param url
* @param favicon
*/
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (progressDialog == null){
progressDialog.setMessage("加载中。。。。。。。。。。。");
}
Log.d("1507","1");
progressDialog.show();
}
/**
* 页面结束的时候 回调此方法
* @param view
* @param url
*/
@Override
public void onPageFinished(WebView view, String url) {
progressDialog.dismiss();
// Log.d("1507", "1");
}
});
}
/**
* 返回
* @param keyCode
* @param event
* @return
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
/**
* webview.canGoBack()判断webview能否后退
*/
if (keyCode == KeyEvent.KEYCODE_BACK&& webView.canGoBack()){
//webView后退
webView.goBack();
}
return super.onKeyDown(keyCode, event);
}
}
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