Android:WebView带划屏手势的浏览器兑现
Android:WebView带划屏手势的浏览器实现
写了简单 Android环境下基于webview的浏览器，实现划屏切换页面的手势，在一个activity里webview的缓冲内切换的。并测试下调用系统拍照的功能
MVC模式（Model-View-Controller）
1.WebView的设置部分
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private void showViews() {
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// TODO Auto-generated method stub |
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mGestureDetector = new GestureDetector(this);//实例化手势对象
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wv_vm.getSettings().setSupportZoom(true);//启用页面的缩放
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wv_vm.getSettings().setBuiltInZoomControls(true);//启用页面缩放的按钮
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wv_vm.getSettings().set<SPAN class=wp_keywordlink_affiliate><A title=JavaScript href="http://www.mikel.cn/category/%e5%bc%80%e5%8f%91%e7%ac%94%e8%ae%b0/javascript" target=_blank>JavaScript</A></SPAN>Enabled(true);//启用<SPAN class=wp_keywordlink_affiliate><A title=JavaScript href="http://www.mikel.cn/category/%e5%bc%80%e5%8f%91%e7%ac%94%e8%ae%b0/javascript" target=_blank>JavaScript</A></SPAN>支持
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wv_vm.loadUrl("http://www.cnblogs.com/pxue/");//加载网址
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wv_vm.setOnTouchListener(this);//监听触摸事件
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wv_vm.setClickable(true);
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wv_vm.setLongClickable(true);
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mGestureDetector.setIsLongpressEnabled(true);
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wv_vm.setWebViewClient(new HelloWebViewClient());//实现点击加载页面在本webview内载入
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wv_vm.setFocusable(true);
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wv_vm.requestFocus(); |
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} |
在WebView加载新开的页面，是重写了Android.webkit.WebViewClient
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private class HelloWebViewClient extends WebViewClient {
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@Override |
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public boolean shouldOverrideUrlLoading(WebView view, String url) {
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view.loadUrl(url); |
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return true;
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} |
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} |
2.划屏手势部分
监听触摸时间传给手势对象
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@Override |
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public boolean onTouch(View v, MotionEvent event) {
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// TODO Auto-generated method stub |
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// Toast.makeText(this, "onTouch", Toast.LENGTH_SHORT).show(); |
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return mGestureDetector.onTouchEvent(event);
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} |
重写了划动事件
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@Override |
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public boolean onFling(MotionEvent e1, MotionEvent e2, float <SPAN class=wp_keywordlink_affiliate><A title=Velocity href="http://www.mikel.cn/tag/velocity/" target=_blank>Velocity</A></SPAN>X,
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float <SPAN class=wp_keywordlink_affiliate><A title=Velocity href="http://www.mikel.cn/tag/velocity/" target=_blank>Velocity</A></SPAN>Y) {
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// TODO Auto-generated method stub |
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if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
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&& Math.abs(<SPAN class=wp_keywordlink_affiliate><A title=Velocity href="http://www.mikel.cn/tag/velocity/" target=_blank>Velocity</A></SPAN>X) > SWIPE_THRESHOLD_VELOCITY) {
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wv_vm.goBack(); |
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} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
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&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { |
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wv_vm.goForward(); |
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} |
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return false;
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} |
变量、常量的声明
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private GestureDetector mGestureDetector;
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private static final int SWIPE_MIN_DISTANCE = 120;
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private static final int SWIPE_THRESHOLD_VELOCITY = 200;
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3.调用系统拍照功能部分
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private void setListensers() {
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// TODO Auto-generated method stub |
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Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
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startActivityForResult(intent, 1);
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} |
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private void findViews() {
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// TODO Auto-generated method stub |
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img_pic=(ImageView)findViewById(R.id.img_pic); |
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} |
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protected void onActivityResult(int requestCode, int resultCode, Intent data)
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{ |
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if (requestCode == 1)
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{ |
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if (resultCode == Activity.RESULT_OK)
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{ |
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// 拍照Activity保存图像数据的key是data，返回的数据类型是Bitmap对象 |
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Bitmap cameraBitmap = (Bitmap) data.getExtras().get("data");
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// 在ImageView组件中显示拍摄的照片 |
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img_pic.setImageBitmap(cameraBitmap); |
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} |
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} |
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super.onActivityResult(requestCode, resultCode, data);
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} |
小demo的源码本来上传到csdn了，可在我上传的资源就是找不到，可能在审核，等我之后不上下载链接吧
想要demo源码也可以邮件给我
邮箱： 625557711@qq.com
下载链接： http://download.csdn.net/source/3248263