WebView loadurl() – Android application… here is a solution to the problem.
WebView loadurl() – Android application
I
get an error when I click the button in the webview page. It is said that when I click on the button, it will change to the Google site. Here is the code and error: –
The main activity .java
package com.mt.nad.testwebapp;
import android.content.Context;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private WebView webC;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webC = (WebView)findViewById(R.id.webView1);
webC.addJavascriptInterface(new JavaScriptInterface(), "CallJavaAdapter");
webC.setWebViewClient(new WebViewClient());
WebSettings webS = webC.getSettings();
webS.setJavaScriptEnabled(true);
webC.loadUrl("http://10.0.2.2/test-java-adapter/");
}
private class JavaScriptInterface{
JavaScriptInterface() {
}
@JavascriptInterface
public void gotoSite() {
Toast.makeText(mContext, url, Toast.LENGTH_SHORT).show();
webC.clearCache(true);
webC.loadUrl("http://google.com");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Handle action bar item clicks here. The action bar will
automatically handle clicks on the Home/Up button, so long
as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop= "@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=". MainActivity">
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView" />
<WebView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/webView1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mt.nad.testwebapp" >
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=". MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
index.html
<! DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Test Only</title>
<link rel="stylesheet" href="">
</head>
<body>
<div>
<input type="button" value="Go To Site" onClick="window. CallJavaAdapter.gotoSite()">
</div>
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
</body>
</html>
Log Cat
12-29 03:54:04.099 2793-2838/com.mt.nad.testwebapp 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) {2e799371} called on Looper (JavaBridge, tid 210) {72d6c48}, FYI main Looper is Looper (main, tid 1) {2e799371})
at android.webkit.WebView.checkThread(WebView.java:2194)
at android.webkit.WebView.clearCache(WebView.java:1451)
at com.mt.nad.testwebapp.MainActivity$JavaScriptInterface.gotoSite(MainActivity.java:56)
at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:28)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)
12-29 03:54:04.100 2793-2838/com.mt.nad.testwebapp W/System.err﹕ java.lang.RuntimeException: java.lang.Throwable: A WebView method was called on thread 'JavaBridge'. All WebView methods must be called on the same thread. (Expected Looper Looper (main, tid 1) {2e799371} called on Looper (JavaBridge, tid 210) {72d6c48}, FYI main Looper is Looper (main, tid 1) {2e799371})
12-29 03:54:04.100 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.webkit.WebView.checkThread(WebView.java:2204)
12-29 03:54:04.100 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.webkit.WebView.clearCache(WebView.java:1451)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at com.mt.nad.testwebapp.MainActivity$JavaScriptInterface.gotoSit (MainActivity.java:56)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:28)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:102)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.os.Looper.loop(Looper.java:135)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.os.HandlerThread.run(HandlerThread.java:61)
12-29 03:54:04.101 2793-2838/com.mt.nad.testwebapp 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) {2e799371} called on Looper (JavaBridge, tid 210) {72d6c48}, FYI main Looper is Looper (main, tid 1) {2e799371})
12-29 03:54:04.102 2793-2838/com.mt.nad.testwebapp W/System.err﹕ at android.webkit.WebView.checkThread(WebView.java:2194)
12-29 03:54:04.102 2793-2838/com.mt.nad.testwebapp W/System.err﹕ ... 7 more
12-29 03:54:04.127 2793-2793/com.mt.nad.testwebapp I/chromium﹕ [INFO:CONSOLE(19)] "Uncaught Error: Java exception was raised during method invocation", source: http://10.0.2.2/test-java-adapter/ (19)
12-29 03:54:04.159 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000b44
12-29 03:54:04.175 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000bd0
12-29 03:54:04.274 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ **** ERROR unknown type 0x0 (glSizeof,72)
12-29 03:54:04.299 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000b44
12-29 03:54:04.323 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000bd0
12-29 03:54:04.448 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ **** ERROR unknown type 0x0 (glSizeof,72)
12-29 03:54:04.468 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000b44
12-29 03:54:04.499 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000bd0
12-29 03:54:04.527 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ **** ERROR unknown type 0x0 (glSizeof,72)
12-29 03:54:04.537 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000b44
12-29 03:54:04.549 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ glUtilsParamSize: unknow param 0x00000bd0
12-29 03:54:04.580 2793-2832/com.mt.nad.testwebapp E/eglCodecCommon﹕ **** ERROR unknown type 0x0 (glSizeof,72)
Source:
http://10.0.2.2/test-java-adapter/ (19)
Refers to
<input type="button" value="Go To Site" onClick="window. CallJavaAdapter.gotoSite()">
If you use a toast or TextView, you can change it when the button is clicked, but for WebView loadurl() it won’t load….
I mean: Android App: How to loadUrl in WebView from another class? But still no luck….
Solution
Change
@JavascriptInterface
public void gotoSite() {
Toast.makeText(mContext, url, Toast.LENGTH_SHORT).show();
webC.clearCache(true);//Here you call the methond in other thread
webC.loadUrl("http://google.com");
}
to:
@JavascriptInterface
public void gotoSite() {
Toast.makeText(mContext, url, Toast.LENGTH_SHORT).show();
new Handler().post(new Runnable() {
@Override
public void run() {
webC.clearCache(true);//Here you call the methond in UI thread
webC.loadUrl("http://google.com");
}
});
}