我创建了一个服务，用我的自定义键盘替换默认键盘...我的自定义键盘的代码工作（我在应用程序中测试）。我将代码包装在服务中并将其部署到Android设备。当我尝试从设备启用我的自定义键盘时，它只是一直崩溃...我使用log cat来获取异常。这是例外：
时间设备名称类型PID标记消息06-03 00：03：38.287 Samsung SM-J327P错误3044 AndroidRuntime java.lang.RuntimeException：无法使用 实例化服务SimpleKeyboard.SimpleKeyboard.Activity1： java.lang.ClassNotFoundException：没找到类 ＆＃34; SimpleKeyboard.SimpleKeyboard.Activity1＆＃34;在路径上：DexPathList [[zip 文件 ＆＃34; /data/app/SimpleKeyboard.SimpleKeyboard-1/base.apk"]，nativeLibraryDirectories = [/数据/应用/ SimpleKeyboard.SimpleKeyboard-1 / LIB /臂， /data/app/SimpleKeyboard.SimpleKeyboard-1/base.apk!/lib/armeabi-v7a， / vendor / lib，/ system / lib]] android.app.ActivityThread.handleCreateService（ActivityThread.java:3844） 在android.app.ActivityThread.access $ 2100（ActivityThread.java:231） 在 android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1911） 在android.os.Handler.dispatchMessage（Handler.java:102）at android.os.Looper.loop（Looper.java:148）at android.app.ActivityThread.main（ActivityThread.java:7422）at java.lang.reflect.Method.invoke（Native Method）at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1230） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1120）
下面发布的是我的清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="SimpleKeyboard.SimpleKeyboard" android:versionCode="1" android:versionName="1.0" android:installLocation="auto">
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="23" />
<uses-permission android:name="android.permission.READ_LOGS" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application>
<service android:name=".Activity1" android:label="@string/app_name" android:permission="android.permission.BIND_INPUT_METHOD" android:exported="true">
<intent-filter>
<action android:name="android.view.InputMethod" />
</intent-filter>
<meta-data android:name="android.view.im" android:resource="@xml/method" />
</service>
</application>
</manifest>
这是服务：
public class Activity1 : InputMethodService
{
private KeyboardView kv;
private Keyboard keyboard;
private bool isCaps = false;
public Activity1()
{
}
public override void OnInitializeInterface()
{
if (IsExternalStorageWritable())
{
File appDirectory = new File(Android.OS.Environment.DirectoryDownloads + "/MyPersonalAppFolder");
File logDirectory = new File(appDirectory + "/log");
File logFile = new File(logDirectory, "logcat" + Guid.NewGuid() + ".txt");
// create app folder
if (!appDirectory.Exists())
{
appDirectory.Mkdirs();
}
// create log folder
if (!logDirectory.Exists())
{
logDirectory.Mkdirs();
}
// clear the previous logcat and then write the new one to the file
try
{
Java.Lang.Process process = Runtime.GetRuntime().Exec("logcat -c");
process = Runtime.GetRuntime().Exec("logcat -f " + logFile);
}
catch (IOException e)
{
e.PrintStackTrace();
}
}
else if (isExternalStorageReadable())
{
// only readable
}
else
{
// not accessible
}
base.OnInitializeInterface();
}
public override void OnCreate()
{
if (IsExternalStorageWritable())
{
File appDirectory = new File(Android.OS.Environment.DirectoryDownloads + "/MyPersonalAppFolder");
File logDirectory = new File(appDirectory + "/log");
File logFile = new File(logDirectory, "logcat" + Guid.NewGuid() + ".txt");
// create app folder
if (!appDirectory.Exists())
{
appDirectory.Mkdirs();
}
// create log folder
if (!logDirectory.Exists())
{
logDirectory.Mkdirs();
}
// clear the previous logcat and then write the new one to the file
try
{
Java.Lang.Process process = Runtime.GetRuntime().Exec("logcat -c");
process = Runtime.GetRuntime().Exec("logcat -f " + logFile);
}
catch (IOException e)
{
e.PrintStackTrace();
}
}
else if (isExternalStorageReadable())
{
// only readable
}
else
{
// not accessible
}
base.OnCreate();
}
public override View OnCreateInputView()
{
keyboard = new Keyboard(this, Resource.Xml.Qwerty);
View kvl = (View)LayoutInflater.Inflate(Resource.Layout.Keyboard, null);
kv = kvl.FindViewById<KeyboardView>(Resource.Id.keyboard);
kv.Keyboard = keyboard;
kv.OnKeyboardActionListener = new MyKeyboardListener(this);
return kv;
// return null;
}
/* Checks if external storage is available for read and write */
public bool IsExternalStorageWritable()
{
string state = Android.OS.Environment.ExternalStorageState;
if (Android.OS.Environment.MediaMounted.Equals(state))
{
return true;
}
return false;
}
/* Checks if external storage is available to at least read */
public bool isExternalStorageReadable()
{
string state = Android.OS.Environment.ExternalStorageState;
if (Android.OS.Environment.MediaMounted.Equals(state) ||
Android.OS.Environment.MediaMountedReadOnly.Equals(state))
{
return true;
}
return false;
}
}
我做错了什么？
答案 0 :(得分：0)
java.lang.ClassNotFoundException：没找到类
请参阅@ SushiHangover＆＃39; s answer：
这是Xamarin.Android中的已知问题：xamarin.android_8.1/#Known_Issues
GitHub PR修复：https://github.com/xamarin/xamarin-android/pull/1142
您可以清理/重建作为Windows上的解决方法。
答案 1 :(得分：0)
仍然不是100％的问题所在，但是我下载了Xamarin的示例项目表，发现我几乎没有关键区别...添加和添加文件以及该清单中缺少的两行...现在可以使用...对于任何有此问题的人，请查看xamarin服务项目示例，您也应该能够解决您的问题。