Android调用HTML中JavaScript方法报错

Android中Java调用JavaScript方法报错：

Android中Java代码：

webView.loadUrl("javascript:show('" + json + "')")//

上边这行代码看着没有，但是有些时候回报如下错误：

W/WebView: java.lang.Throwable: A WebView method was called on thread 'JavaBridge'. All WebView methods must be called on the same thread. (Expected Looper Looper (main, tid 1) {24c92049} called on Looper (JavaBridge, tid 5570) {2fd70380}, FYI main Looper is Looper (main, tid 1) {24c92049})
               at android.webkit.WebView.checkThread(WebView.java:2309)
               at android.webkit.WebView.loadUrl(WebView.java:884)
               at cn.qjnu.androidandh5.JsCallJavaCallPhoneActivity$JSCallJavaCallPhoneTest.showcontacts(JsCallJavaCallPhoneActivity.java:55)
               at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
               at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:28)
               at android.os.Handler.dispatchMessage(Handler.java:111)
               at android.os.Looper.loop(Looper.java:179)
               at android.os.HandlerThread.run(HandlerThread.java:61)
W/System.err: java.lang.RuntimeException: java.lang.Throwable: A WebView method was called on thread 'JavaBridge'. All WebView methods must be called on the same thread. (Expected Looper Looper (main, tid 1) {24c92049} called on Looper (JavaBridge, tid 5570) {2fd70380}, FYI main Looper is Looper (main, tid 1) {24c92049})
W/System.err:     at android.webkit.WebView.checkThread(WebView.java:2319)
W/System.err:     at android.webkit.WebView.loadUrl(WebView.java:884)
W/System.err:     at cn.qjnu.androidandh5.JsCallJavaCallPhoneActivity$JSCallJavaCallPhoneTest.showcontacts(JsCallJavaCallPhoneActivity.java:55)
W/System.err:     at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
W/System.err:     at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:28)
W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:111)
W/System.err:     at android.os.Looper.loop(Looper.java:179)
W/System.err:     at android.os.HandlerThread.run(HandlerThread.java:61)
W/System.err: Caused by: java.lang.Throwable: A WebView method was called on thread 'JavaBridge'. All WebView methods must be called on the same thread. (Expected Looper Looper (main, tid 1) {24c92049} called on Looper (JavaBridge, tid 5570) {2fd70380}, FYI main Looper is Looper (main, tid 1) {24c92049})
W/System.err:     at android.webkit.WebView.checkThread(WebView.java:2309)

W/System.err: ... 7 more

解决办法，把webView.loadUrl(String url)放在webView.post(Runnable action)中执行即可解决：

webView.post( new Runnable(){

@Override

public void run(0){

webView.ladUrl(String url);

}

});