Android 2.2 Webview causes OpenGL ES API with no current context (logged once per thread)

Question

First of all, thanks for reading this post and in advance for helping me with this matter. I'm currently creating a webshell for android to run Webapps in, this is running on the Android 2.2 SDK.

The problem appears when i debug my application (this is done on an Android 4.0 Phone through usb):

09-28 11:32:32.415: D/dalvikvm(25629): Debugger has detached; object registry had 576 entries
09-28 11:32:36.355: W/ActivityThread(25764): Application com.android_api8_webshell is waiting for the debugger on port 8100...
09-28 11:32:36.375: I/System.out(25764): Sending WAIT chunk
09-28 11:32:36.380: I/dalvikvm(25764): Debugger is active
09-28 11:32:36.575: I/System.out(25764): Debugger has connected
09-28 11:32:36.575: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:36.775: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:36.975: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:37.175: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:37.375: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:37.575: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:37.780: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:37.980: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:38.180: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:38.385: I/System.out(25764): waiting for debugger to settle...
09-28 11:32:38.585: I/System.out(25764): debugger has settled (1497)
09-28 11:32:38.710: I/webclipboard(25764): clipservice: android.sec.clipboard.ClipboardExManager@41a184d8
09-28 11:32:38.765: V/StringUrl(25764): String: http://www.cidesign.nl
09-28 11:32:38.785: D/WML_SISO(25764): InitPasteboardJni
09-28 11:32:38.795: V/(25764): NotificationPresenterImpl::setSettingsValue 0 
09-28 11:32:38.795: V/(25764): NotificationPresenterImpl::setSettingsValue 0 
09-28 11:32:38.800: D/webkit(25764): Firewall not null
09-28 11:32:38.800: D/webkit(25764): euler: isUrlBlocked = false
09-28 11:32:38.930: D/CLIPBOARD(25764): Hide Clipboard dialog at Starting input: finished by someone else... !
09-28 11:32:42.440: I/GATE(25764): <GATE-M>DEV_ACTION_COMPLETED</GATE-M>
09-28 11:32:42.455: E/libEGL(25764): call to OpenGL ES API with no current context (logged once per thread)
09-28 11:32:42.455: D/ShaderProgram(25764): couldn't load the vertex shader!
09-28 11:32:42.455: E/libEGL(25764): call to OpenGL ES API with no current context (logged once per thread)
09-28 11:32:42.455: D/ShaderProgram(25764): couldn't load the vertex shader!
09-28 11:32:42.455: E/libEGL(25764): call to OpenGL ES API with no current context (logged once per thread)
09-28 11:32:42.455: D/ShaderProgram(25764): couldn't load the vertex shader!
09-28 11:32:42.455: E/libEGL(25764): call to OpenGL ES API with no current context (logged once per thread)
09-28 11:32:42.455: D/ShaderProgram(25764): couldn't load the vertex shader!
09-28 11:32:42.455: E/libEGL(25764): call to OpenGL ES API with no current context (logged once per thread)
09-28 11:32:42.455: D/ShaderProgram(25764): couldn't load the vertex shader!

This is my code in my main class:

package com.android_api8_webshell;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.webkit.WebView;
import android.webkit.WebSettings;

public class Main extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        WebView myWebView = (WebView) findViewById(R.id.webView1);

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

        Log.v("StringUrl", "String: " + getResources().getText(R.string.url));

        myWebView.loadUrl(getResources().getText(R.string.url).toString());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }  
}

And last but not least, is the xml im running with:

<resources>
    <string name="title_activity_main">Main</string>
    <string name="url">http://www.cidesign.nl</string>
    <string name="app_name">Android_API8_WebShell</string>
    <string name="menu_settings">Settings</string>
</resources>

I'm aware of this configuration that helped others:

<application android:hardwareAccelerated="true" ...>

This is however for SDK's above 2.3.3, the SDK i'm running with doesnt support this feature.

I really hope you can help me with this matter.

Thanks in advance,

David

Answer 1

To get android:hardwareAccelerated property and still support API 8 (2.2), set targetSdkVersion to 11 but leave minSdkVersion as it is:

<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="11" />
<application android:hardwareAccelerated="true" ...

When run on pre-API 11 devices, hardwareAccelerated will just be ignored.