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前言

一直以为webView就是加载个链接如此简单 原来webView中需要处理的问题也有很多

微信 支付宝支付调用失败

如果webView调用支付失败 可以将url拦截 对url做出判断

mWebView.setWebViewClient(new WebViewClient() {            @Override            public boolean shouldOverrideUrlLoading(WebView view, String url) {                //对url做出判断                if (url.startsWith("http:") || url.startsWith("https:")) {                    return false;                }                try {                	//重新加载url                    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));                    startActivity(intent);                } catch (Exception e) {                    Log.e(TAG, " Exception is ==== >>> " + e);                }                return true;            }        });

调用系统相册并上传图片

// 不同方式的请求码        public static final int REQUEST_SELECT_FILE = 100;    public final static int FILECHOOSER_RESULTCODE = 1;    // 接收安卓5.0以上的        public ValueCallback
   
     uploadMessage;    //接收5.0以下的       	private ValueCallback
    
      mUploadMessage;	 		  //设置支持调用相册        mWebView.setWebChromeClient(new WebChromeClient() {            // Android 3.0+            public void openFileChooser(ValueCallback
     
       uploadMsg) {                mUploadMessage = uploadMsg;                Intent i = new Intent(Intent.ACTION_GET_CONTENT);                i.addCategory(Intent.CATEGORY_OPENABLE);                i.setType("image/*");                startActivityForResult(Intent.createChooser(i, "File Chooser"),FILECHOOSER_RESULTCODE);            }            // Android 3.0+            public void openFileChooser(ValueCallback uploadMsg,String acceptType) {                mUploadMessage = uploadMsg;                Intent i = new Intent(Intent.ACTION_GET_CONTENT);                i.addCategory(Intent.CATEGORY_OPENABLE);                i.setType("*/*");                startActivityForResult(Intent.createChooser(i, "File Browser"),                ProxyActivity.FILECHOOSER_RESULTCODE);            }            // Android 4.1+ 会调用这个            public void openFileChooser(ValueCallback
      
        uploadMsg,String acceptType, String capture) {                mUploadMessage = uploadMsg;                Intent i = new Intent(Intent.ACTION_GET_CONTENT);                i.addCategory(Intent.CATEGORY_OPENABLE);                i.setType("image/*");                startActivityForResult(                        Intent.createChooser(i, "File Chooser"),ProxyActivity.FILECHOOSER_RESULTCODE);            }            //Android 5.0会调用这个            @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)            public boolean onShowFileChooser(WebView webView,             ValueCallback
       
         filePathCallback, FileChooserParams fileChooserParams) {                //确保没有现有的消息                 if (uploadMessage != null) {                    uploadMessage.onReceiveValue(null);                    uploadMessage = null;                }                uploadMessage = filePathCallback;                Intent intent = fileChooserParams.createIntent();                startActivityForResult(intent, REQUEST_SELECT_FILE);                return true;            }        });	//将选中的图片结果带回    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)    @Override    protected void onActivityResult(int requestCode, int resultCode,Intent intent) {        super.onActivityResult(requestCode, resultCode, intent);        if (requestCode == FILECHOOSER_RESULTCODE && resultCode == RESULT_OK) {            Uri uri = intent.getData();            Log.e("tag", "图片数据:" + uri.toString());            //将图片显示到webView            mUploadMessage.onReceiveValue(intent.getData());            mUploadMessage = null;        } else if (requestCode == REQUEST_SELECT_FILE) {            if (uploadMessage == null)                return;            uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent));            uploadMessage = null;        }    }	    @Override    protected void onResume() {        super.onResume();        mWebView.onResume();        if (mUploadMessage != null) {            //取消之后要告诉WebView不要再等待返回结果，            设置为空就等于重置了状态,也是避免只能选择一次图片的原因            mUploadMessage.onReceiveValue(null);            mUploadMessage = null;        }    }
       
      
     
    
   

按钮不可点击

//解决webview加载的网页上的按钮点击失效  以及有些图标显示不出来的问题        WebSettings webSettings = mWebView.getSettings();        //下面这2句代码是关键 解决按钮点击失效        mWebView.setWebChromeClient(new WebChromeClient());        mWebView.setWebViewClient(new WebViewClient());

WebView返回键处理

//点击回退按钮不是退出应用程序，而是返回上一个页面    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if (keyCode == KeyEvent.KEYCODE_BACK && mWebView.canGoBack()) {            mWebView.goBack();            return true;        }        return super.onKeyDown(keyCode, event);    }

销毁

@Override    protected void onDestroy() {        if (mWebView != null) {            final ViewGroup viewGroup = (ViewGroup) mWebView.getParent();            if (viewGroup != null) {                viewGroup.removeView(mWebView);            }            mWebView.destroy();        }        super.onDestroy();        mUnbinder.unbind();    }

总结

WebView实用性很强 需要熟悉各种用法 还是得多多练习

共勉

我要一步一步往上爬

在最高点乘着叶片往前飞

任风吹干流过的泪和汗

我要一步一步往上爬

等待阳光静静看着它的脸

小小的天有大大的梦想

我有属于我的天

任风吹干流过的泪和汗

总有一天我有属于我的天

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