为什么键盘滑动会使我的应用程序崩溃? [英] Why does keyboard-slide crash my app?
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问题描述
如果我在 Moto Droid A855 上以物理方式滑出键盘，它会使我的测试应用程序崩溃，并在下面粘贴堆栈跟踪.我不明白为什么?
If I physically slide out the keyboard on my Moto Droid A855, it crashes my test app with the stack trace pasted below. I don't understand why?
另外，如果我在不使用键盘的情况下启动我的应用程序，我的应用程序会在启动时立即崩溃.
Also, if I start my app with the keyboard out, my app crashes immediately on startup.
该应用由一个 Activity 组成，其中包含一个 viewflipper 作为主视图布局.viewflipper 包含两个线性布局...
The app consists of an activity, which contains a viewflipper as the main view layout. The viewflipper contains two linearlayouts...
堆栈跟踪:
06-10 21:10:17.652 E/AndroidRuntime( 3785): Uncaught handler: thread main exiting due to uncaught exception
06-10 21:10:17.668 E/AndroidRuntime( 3785): java.lang.IllegalArgumentException: Receiver not registered: android.widget.ViewFlipper$1@447af0b8
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread$PackageInfo.forgetReceiverDispatcher(ActivityThread.java:667)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ApplicationContext.unregisterReceiver(ApplicationContext.java:747)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:321)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.widget.ViewFlipper.onDetachedFromWindow(ViewFlipper.java:104)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.View.dispatchDetachedFromWindow(View.java:5835)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1076)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewRoot.dispatchDetachedFromWindow(ViewRoot.java:1570)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewRoot.doDie(ViewRoot.java:2556)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.ViewRoot.die(ViewRoot.java:2526)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:218)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.view.Window$LocalWindowManager.removeViewImmediate(Window.java:436)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3498)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3599)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread.access$2300(ActivityThread.java:119)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1867)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.os.Handler.dispatchMessage(Handler.java:99)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.os.Looper.loop(Looper.java:123)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at android.app.ActivityThread.main(ActivityThread.java:4363)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at java.lang.reflect.Method.invokeNative(Native Method)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at java.lang.reflect.Method.invoke(Method.java:521)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
06-10 21:10:17.668 E/AndroidRuntime( 3785): at dalvik.system.NativeStart.main(Native Method)
06-10 21:10:17.684 I/Process ( 1017): Sending signal. PID: 3785 SIG: 3
添加 XML 布局和主要活动的相关片段.
added XML layout and relevant snippets from main activity.
整个 XML 布局文件
Entire XML layout file
<?xml version="1.0" encoding="utf-8"?>
<ViewFlipper
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/vFlipper"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<!-- Linear Layout 1: messages and overview. -->
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TableRow android:id="@+id/TableRow01" android:layout_width="fill_parent" android:layout_height="wrap_content">
<TextView
android:text="Connection info"
android:id="@+id/tvCon1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#F0F0F0"
android:textColor="#FF0000"
/>
</TableRow>
<ScrollView
android:id="@+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/tvMessages"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text=""
/>
</ScrollView>
</LinearLayout>
<!-- Linear Layout 2: settings -->
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TableRow
android:id="@+id/TableRow03"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:text="hello world"
android:id="@+id/asdfasdf2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</TableRow>
</LinearLayout>
</ViewFlipper>
主要活动的代码片段:
/**
* Attempt (not currently working) to work around this bug: http://code.google.com/p/android/issues/detail?id=6191
* TODO: make it work.
*/
@Override
public void onDetachedFromWindow() {
Log.d("Dash","OnDetachedFromWindow()");
try {
super.onDetachedFromWindow();
}
catch (Exception e) {
ViewFlipper v = (ViewFlipper)findViewById(R.id.vFlipper);
if (v != null) {
Log.d("Dash","De-Bug hit. e=" + e.getMessage());
v.stopFlipping();
}
}
}
推荐答案
要解决这个问题，你必须
To resolve this issue you must
- 定义一个名为
MyViewFlipper的新类，它会覆盖ViewFlipper(见下文) - 在您之前引用过的任何地方引用该新类
ViewFlipper - 如下所示定义您的类和布局:
- Define a new class called
MyViewFlipperwhich overridesViewFlipper(see below) - Reference that new class anywhere you would have previously referenced
ViewFlipper - Define your class and layout as shown below:
名为 MyViewFlipper 的新类.包含以下内容:
New class called MyViewFlipper. Contains the following:
package com.gtosoft.dash; // change this to match your own app.
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ViewFlipper;
public class MyViewFlipper extends ViewFlipper {
public MyViewFlipper(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDetachedFromWindow() {
try{
super.onDetachedFromWindow();
}catch(Exception e) {
Log.d("MyViewFlipper","Stopped a viewflipper crash");
stopFlipping();
}
}
}
现在要使用 ViewFlipper 的固定"版本，您必须在 xml 布局中引用它.由于它基本上是一个自定义视图"，因此您必须完全限定 MyViewFlipper 的包路径，如下所示:
Now to use this "fixed" version of ViewFlipper you have to reference it in the xml layout. Since it is basically a "custom view", you have to fully qualify the package path to MyViewFlipper, as seen here:
<com.gtosoft.dash.MyViewFlipper
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/vFlipper"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
(insert all the other old layout code here)
</com.gtosoft.dash.MyViewFlipper>
现在，应用程序不再因键盘滑动事件而崩溃，或者应用程序启动时已滑出.在日志中查找:
Now the app no longer crashes on the keyboard slide event or if the app is started with slide already out. Look for this in the log:
06-11 20:08:15.811 D/MyViewFlipper( 6106): Stopped a viewflipper crash
信用:http://code.google.com/p/android/issues/detail?id=6191
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