我想从 Webview 调用 Java。
我在下面有 JavaScriptInterface
:
class JavaScriptInterface{
private Activity activity;
public JavaScriptInterface(Activity activiy) {
this.activity = activiy;
}
public void open(String message){
//do something
}
}
我添加JavaScriptInterface
JavaScriptInterface jsInterface = new JavaScriptInterface(this);
webView.getSettings().setJavaScriptEnabled(true);
webView.addJavascriptInterface(jsInterface, "JSInterface");
在我的 HTML 中,我有这个 onclick 事件:
onclick="window.JSInterface.open('hi');"
我也试过:
onclick="JSInterface.open('hi');"
我在 logcat 中有这个错误:
04-16 14:55:15.829: W/dalvikvm(721): JNI WARNING: jarray 0x4050cf68 points to non-array object (Ljava/lang/String;)
04-16 14:55:15.829: I/dalvikvm(721): "WebViewCoreThread" prio=5 tid=9 NATIVE
04-16 14:55:15.829: I/dalvikvm(721): | group="main" sCount=0 dsCount=0 obj=0x40521218 self=0x1f6cf8
04-16 14:55:15.829: I/dalvikvm(721): | sysTid=729 nice=0 sched=0/0 cgrp=default handle=2059824
04-16 14:55:15.839: I/dalvikvm(721): | schedstat=( 5717972154 3300872155 567 )
04-16 14:55:15.839: I/dalvikvm(721): at android.webkit.WebViewCore.nativeTouchUp(Native Method)
04-16 14:55:15.839: I/dalvikvm(721): at android.webkit.WebViewCore.nativeTouchUp(Native Method)
04-16 14:55:15.839: I/dalvikvm(721): at android.webkit.WebViewCore.access$3300(WebViewCore.java:53)
04-16 14:55:15.839: I/dalvikvm(721): at android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1158)
04-16 14:55:15.863: I/dalvikvm(721): at android.os.Handler.dispatchMessage(Handler.java:99)
04-16 14:55:15.869: I/dalvikvm(721): at android.os.Looper.loop(Looper.java:130)
04-16 14:55:15.869: I/dalvikvm(721): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:629)
04-16 14:55:15.869: I/dalvikvm(721): at java.lang.Thread.run(Thread.java:1019)
04-16 14:55:15.869: E/dalvikvm(721): VM aborting
如何解决?或者其他方法?
谢谢
最佳答案
您需要通过设置在 WebView 中启用 Javascript
final WebView myWebView = (WebView) findViewById(R.id.webview); myWebView.setVerticalScrollBarEnabled(false); myWebView.setHorizontalScrollBarEnabled(false); WebSettings webSettings = myWebView.getSettings(); webSettings.setJavaScriptEnabled(true); webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
您需要在 HTML DOM 中加载 JS。
JsInterface jsInterface = new JsInterface(); jsInterface.wordDef = content; myWebView.addJavascriptInterface(jsInterface, "interfaces"); myWebView.loadUrl("file:///android_asset/some.html");
从 HTML/JS 调用您的界面
/**JAVA CODE **/ public class JsInterface { public String someString; Context mContext; public void JsInterface(Context c){ mContext = c; } public String someFunction(){ Log.v("JSInterface", ""+someString); return someString; } } /* JS Code */ function addData(){ var data = interfaces.someFunction(); }
关于Android - 从 Webview 调用 Java,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16030737/