前言碎语
博主最近想做一款app，因为内容已经有了，故想到了使用WebView来做 ，现将代码贴出如下，供有同样需求的人参考，少走弯路
项目工程地址：https://coding.net/u/kailingchen/p/juanmei_App/git
关键代码如下
代码语言：javascript复制public class MainActivity extends Activity{
private WebView webview;
private Handler handler;
private ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initWebView();
}
/**
* 初始化WebView容器
*/
public void initWebView() {
//实例化WebView对象
webview = new WebView(this);
handler = new Handler() {
public void handleMessage(Message msg) {//定义一个Handler，用于处理下载线程与UI间通讯
if (!Thread.currentThread().isInterrupted()) {
switch (msg.what) {
case 0:
pd.show();//显示进度对话框
break;
case 1:
pd.hide();//隐藏进度对话框，不可使用dismiss()、cancel(),否则再次调用show()时，显示的对话框小圆圈不会动。
break;
}
}
super.handleMessage(msg);
}
};
//设置WebViewClient
webview.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;//如果不需要其他对点击链接事件的处理返回true，否则返回false
}
@Override
public void onPageFinished(WebView view, String url) {
if (!webview.getSettings().getLoadsImagesAutomatically()) {
webview.getSettings().setLoadsImagesAutomatically(true);
}
}
});
webview.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int progress) {
pd.setMessage("数据载入中(" progress "%)，请稍候！");
if (progress == 100) {
handler.sendEmptyMessage(1);//如果全部载入,隐藏进度对话框
}
MainActivity.this.setProgress(progress);
}
});
pd = new ProgressDialog(MainActivity.this);
pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
handler.sendEmptyMessage(0);
WebSettings webSettings = webview.getSettings();
webSettings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);//优先使用缓存的内容
webSettings.setUseWideViewPort(true);//设定支持网页viewport
webSettings.setJavaScriptEnabled(true);//设置WebView属性，能够执行Javascript脚本
// webSettings.setSupportZoom(true);//支持缩放
// webSettings.setBuiltInZoomControls(true);// 设置显示缩放按钮
// setZoomControlGone(webview);
webSettings.supportMultipleWindows(); //多窗口
webSettings.setJavaScriptCanOpenWindowsAutomatically(true); //支持通过JS打开新窗口
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);//禁止左右滚动
webview.requestFocusFromTouch();//支持获取手势焦点
webview.setHorizontalScrollBarEnabled(false);//水平不显示滚动条
webview.setVerticalScrollbarOverlay(true);
getWindow().requestFeature(Window.FEATURE_PROGRESS);//设置窗口风格为进度条
//告诉WebView先不要自动加载图片，等页面finish后再发起图片加载
if (Build.VERSION.SDK_INT >= 19) {
webview.getSettings().setLoadsImagesAutomatically(true);
} else {
webview.getSettings().setLoadsImagesAutomatically(false);
}
//加载需要显示的网页
webview.loadUrl("http://www.kailing.pub/juanmei/");
//设置Web视图
setContentView(webview);
}
//实现放大缩小控件隐藏
public void setZoomControlGone(View view) {
Class classType;
Field field;
try {
classType = WebView.class;
field = classType.getDeclaredField("mZoomButtonsController");
field.setAccessible(true);
ZoomButtonsController mZoomButtonsController = new ZoomButtonsController(view);
mZoomButtonsController.getZoomControls().setVisibility(View.GONE);
try {
field.set(view, mZoomButtonsController);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}
//设置回退
//覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
webview.goBack();
return true;
} else if (keyCode == KeyEvent.KEYCODE_BACK) {
ConfirmExit();//按了返回键，但已经不能返回，则执行退出确认
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* 退出确认框
*/
public void ConfirmExit() {
AlertDialog.Builder ad = new AlertDialog.Builder(MainActivity.this);
ad.setTitle("退出");
ad.setMessage("是否退出娟妹美甲坊?");
ad.setPositiveButton("是", new DialogInterface.OnClickListener() {//退出按钮
@Override
public void onClick(DialogInterface dialog, int i) {
// TODO Auto-generated method stub
MainActivity.this.finish();//关闭activity
System.exit(0);
}
});
ad.setNegativeButton("否", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int i) {
//不退出不用执行任何操作
}
});
ad.show();//显示对话框
}
// 继承GestureListener，重写left和right方法,
private class MyGestureListener extends GestureListener {
public MyGestureListener(Context context) {
super(context);
}
@Override
public boolean left() {
webview.goForward();
return super.left();
}
@Override
public boolean right() {
webview.goBack();
return super.right();
}
}
}
