Android和js交互

首先要設置支持javascript

WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);

設置接口方法，創建接口，接口名可以隨便取，但是在HTML文件中必須一致

mWebView.addJavascriptInterface(new DemoJavaScriptInterface(), "demo");

private class DemoJavaScriptInterface {
    public DemoJavaScriptInterface() {
    }

    public void clickOnAndroid() {
        mHandler.post(new Runnable() {
            @Override
            public void run() {

            }
        });
    }
}

HTML文件中對應的點擊方法聲明如下：

加載HTML文件

mWebView.loadUrl("file:///android_asset/index.html");

這裡寫代碼片* 創建兩個對應的Client類，進行處理

mWebView.setWebViewClient(new MyWebViewClient());
mWebView.setWebChromeClient(new MyWebChromeClient());

private class MyWebViewClient extends WebViewClient {
public MyWebViewClient() {
super();
}

@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
    return super.shouldOverrideUrlLoading(view, request);
}

@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
    super.onPageStarted(view, url, favicon);
}

@Override
public void onPageFinished(WebView view, String url) {
    super.onPageFinished(view, url);
}

@Override
public void onLoadResource(WebView view, String url) {
    super.onLoadResource(view, url);
}

}

private class MyWebChromeClient extends WebChromeClient {

public MyWebChromeClient() {
    super();
}

@Override
public void onProgressChanged(WebView view, int newProgress) {
    super.onProgressChanged(view, newProgress);
}

@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
    return super.onJsAlert(view,url,message,result);
}

@Override
public boolean onJsConfirm(WebView view, String url, String message, JsResult result) {
    return super.onJsConfirm(view,url,message,result);
}

@Override
public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
    return super.onJsPrompt(view, url, message, defaultValue, result);
}

}