javascript - 从android webview调用javascript函数？

Question

我尝试直接从我的应用程序(webview.apk)调用一个javascript函数，为了启动一个自动播放html5视频剪辑的脚本，我尝试在webview loadURL之后添加它，但没有运气。

也许有人可以看一下代码。我缺少什么？谢谢!

package tscolari.mobile_sample;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebChromeClient;

import android.media.MediaPlayer;


public class InfoSpotActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        setContentView(R.layout.main);

        WebView mainWebView = (WebView) findViewById(R.id.mainWebView);

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

        mainWebView.setWebChromeClient(new WebChromeClient());

        mainWebView.setWebViewClient(new MyCustomWebViewClient());
        mainWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);




        mainWebView.loadUrl("http://server.info-spot.net");
        mainWebView.loadUrl("javascript:playVideo()");


    }


    private class MyCustomWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }
}

Answer 1

等待页面加载完成，然后执行 webview.loadUrl("javascript:playVideo()");

private class MyCustomWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
         view.loadUrl(url);
         return true;
    }
    public void onPageFinished(WebView view, String url) {
         view.loadUrl("javascript:playVideo()");
    }
}