我有一个显示网页的活动。在某些手机（例如，Huawei Ascend）上，此活动以导致应用程序重新启动的方式崩溃，但不会导致通常的 android 错误弹出窗口进行报告。（其他手机（例如 Nexus）根本不会崩溃。）它似乎总是在网页加载时崩溃，但不是在任何特定时间点，例如有时在 shouulOverrideUrlLoading 时，有时在 onPageStarted 或 onPageFinished 期间。
我认为 WebView 导致了这个——
08-29 21:08:22.577: A/libc(957): 致命信号 11 (SIGSEGV) 在 0x00000008 (code=1), 线程 957
——但我不知道为什么。
这是活动：
public class WebDisplay extends Activity
{
private String sentUrl = "";
public WebView myWebView;
public ProgressBar spinner;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate (Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Log.d("WEBVIEW", "onCreate");
getWindow().setBackgroundDrawableResource(R.color.white);
Bundle extras = getIntent().getExtras();
if (null != extras)
{
sentUrl = extras.getString("displayURL");
}
setContentView(R.layout.webdisplay);
myWebView = (WebView) findViewById(R.id.webDisplay);
spinner = (ProgressBar) findViewById(R.id.webLoading);
// WebView displays default to showing things in exact pixel size at 100%
// resolution, meaning it generally opens on a zoomed in portion of the
// top left of the web page and refuses to let you zoom out, so we have
// to force it to display pages a bit more reasonably.
myWebView.getSettings().setLoadWithOverviewMode(true);
myWebView.getSettings().setUseWideViewPort(true);
myWebView.getSettings().setPluginState(WebSettings.PluginState.ON);
// By default, there is no javascript support or zoom controls, so
// turn both of those on.
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setSupportZoom(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
// We want links to continue opening inside the app.
myWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d("WEBVIEW", "loadUrl="+url);
view.loadUrl(url); // open link in the same web view.
return true;
}
@Override
public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) {
Log.d("WEBVIEW", "onPageStarted="+url);
super.onPageStarted(view, url, favicon);
if (View.GONE == spinner.getVisibility()) { spinner.setVisibility(View.VISIBLE); }
}
@Override
public void onPageFinished(WebView view, String url) {
Log.d("WEBVIEW", "onPageFinished="+url);
super.onPageFinished(view, url);
if (View.VISIBLE == spinner.getVisibility()) { spinner.setVisibility(View.GONE); }
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String url) {
Log.d("WEBVIEW", "onPageError="+url+"::descr="+description);
}
});
// Try to get YouTube videos working.
myWebView.setWebChromeClient(new WebChromeClient() {
});
// So the user doesn't have to back through their entire history to get
// back to the app, we provide a "done browsing" button.
Button doneButton = (Button) findViewById(R.id.doneButton);
doneButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v)
{
finish();
}
});
ImageButton backButton = (ImageButton) findViewById(R.id.webBackButton);
backButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0)
{
myWebView.goBack();
}
});
ImageButton fwdButton = (ImageButton) findViewById(R.id.webForwardButton);
fwdButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0)
{
myWebView.goForward();
}
});
ImageButton refreshButton = (ImageButton) findViewById(R.id.refreshButton);
refreshButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0)
{
myWebView.reload();
}
});
myWebView.loadUrl(sentUrl);
}
@Override
protected void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
// Save the state of the WebView
myWebView.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
// Restore the state of the WebView
myWebView.restoreState(savedInstanceState);
}
}
这是加载的布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white" >
<RelativeLayout
android:id="@+id/webNavBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/abs__background_holo_light"
android:layout_alignParentBottom="true"
android:padding="2dp" >
<Button
android:id="@+id/doneButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/refreshButton"
android:layout_alignTop="@+id/refreshButton"
android:background="@drawable/custom_button"
android:padding="5dp"
android:text="@string/web_done"
android:textColor="@color/white"
android:textStyle="bold" />
<ImageButton
android:id="@+id/refreshButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="@drawable/custom_button"
android:src="@drawable/ic_action_refresh"
android:contentDescription="@string/web_refresh"
android:textColor="@color/white"
android:padding="5dp" />
<ImageButton
android:id="@+id/webBackButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginRight="5dp"
android:layout_toLeftOf="@+id/webForwardButton"
android:background="@drawable/custom_button"
android:src="@drawable/navigation_back"
android:padding="5dp"
android:contentDescription="@string/web_back"
android:textColor="@color/white" />
<ImageButton
android:id="@+id/webForwardButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="@drawable/custom_button"
android:src="@drawable/navigation_forward"
android:contentDescription="@string/web_forward"
android:textColor="@color/white"
android:padding="5dp" />
</RelativeLayout>
<WebView
android:id="@+id/webDisplay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_above="@id/webNavBar" />
<ProgressBar
android:id="@+id/webLoading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="80dp"
style="@android:style/Widget.ProgressBar.Large"
android:layout_centerHorizontal="true" />
</RelativeLayout>
ETA：像这样关闭硬件加速
myWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
似乎停止了 SIGSEV 的事情，但也停止了 YouTube 视频的播放（我仍然有音频，但没有图像）。