小编Cha*_*lan的帖子

当访问具有不受信任证书的https URL时,我可以绕过SSL错误,以下代码使用WebView以下版本的KitKat

public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {

                    handler.proceed();
}

但它不适用于KitKat浏览器.有什么想法可以解决吗？

运行我从 Github 检出的开源 Flutter 应用程序时，出现以下错误。它运行屏幕的第一个 Activity，大约 1 秒后应用程序崩溃并在 Logcat 中出现以下错误。我在 Flutter 的运行控制台中看不到任何错误。

Process: app.ceylon.selftrackingapp, PID: 32590
    java.lang.RuntimeException: Unable to start activity ComponentInfo{app.ceylon.selftrackingapp/app.ceylon.selftrackingapp.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'void io.flutter.plugin.common.BinaryMessenger.setMessageHandler(java.lang.String, io.flutter.plugin.common.BinaryMessenger$BinaryMessageHandler)' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3448)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3595)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2147)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:237)
        at android.app.ActivityThread.main(ActivityThread.java:7811)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1076)
     Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void io.flutter.plugin.common.BinaryMessenger.setMessageHandler(java.lang.String, io.flutter.plugin.common.BinaryMessenger$BinaryMessageHandler)' on a null object reference
        at io.flutter.plugin.common.MethodChannel.setMethodCallHandler(MethodChannel.java:116)
        at …

如何OutlineButton在Flutter中左对齐图标？ Icon可以如下添加，但图标和文本在按钮中居中对齐。有没有办法将图标向左对齐，文本是否居中对齐？

return new OutlineButton.icon(
  onPressed: onPressed,
  label: new Text(title),
  icon: icon,
  highlightedBorderColor: Colors.orange,
  color: Colors.green,
  borderSide: new BorderSide(color: Colors.green),
  shape: new RoundedRectangleBorder(
      borderRadius: new BorderRadius.circular(5.0)));