对于想了解需要为EmptyStacks创建一个新的RunTimeException的读者，本文将是一篇不可错过的文章，我们将详细介绍必须为createuser指定identifiedby，并且为您提供
对于想了解需要为EmptyStacks创建一个新的RunTimeException的读者，本文将是一篇不可错过的文章，我们将详细介绍必须为create user 指定identified by，并且为您提供关于Android FATAL EXCEPTION MAIN：java.lang.RuntimeException：无法启动活动ComponentInfo、android – 如何解决FATAL EXCEPTION java.lang.RuntimeException：执行doInBackground()时发生错误、Android-Caught a RuntimeException from the binder stub implementation.、Context.startActivity 出现 AndroidRuntimeException的有价值信息。
本文目录一览：- 需要为EmptyStacks创建一个新的RunTimeException（必须为create user 指定identified by）
- Android FATAL EXCEPTION MAIN：java.lang.RuntimeException：无法启动活动ComponentInfo
- android – 如何解决FATAL EXCEPTION java.lang.RuntimeException：执行doInBackground()时发生错误
- Android-Caught a RuntimeException from the binder stub implementation.
- Context.startActivity 出现 AndroidRuntimeException
需要为EmptyStacks创建一个新的RunTimeException（必须为create user 指定identified by）
所以我的任务听起来很简单，但是却使我感到困惑。我已经浏览了Internet上的代码，但无法掌握。我也无法掌握老师张贴的幻灯片。这是我的要求。
创建一个新的运行时异常类型，称为EmptyStackException。
但是，我不知道如何制作方法，类，变量或满足要求所需的任何内容。我有一些类是DynamicArrayStack和LinkedStack的实现。堆栈的接口。
任何指针将大有帮助。
谢谢
Mjall2
答案1
小编典典创建一个新的运行时异常类型，称为EmptyStackException。
创建类型由
public class EmptyStackException extends RuntimeException { ... }现在，只要我们知道要在此新类型（aka类）中添加什么即可。通常，我们查看超类中的方法，并覆盖需要不同处理的方法。下面，我重写了其中的一些，但委托给了现有的类。如果您不需要对行为进行任何更改，则无需执行此操作。
public class EmptyStackException extends RuntimeException { public EmptyStackException() { super(); } public EmptyStackException(String s) { super(s); } public EmptyStackException(String s, Throwable throwable) { super(s, throwable); } public EmptyStackException(Throwable throwable) { super(throwable); } }
Android FATAL EXCEPTION MAIN：java.lang.RuntimeException：无法启动活动ComponentInfo
我是编程android的nubie,我知道这里有4m是很多页面为我的问题打乱解决方案,但现在我输了2天仍然没有得到解决方案.请帮我！
首先是我的错误：
01-02 11:08:27.314: D/AndroidRuntime(1045): Shutting down VM
01-02 11:08:27.314: W/dalvikvm(1045): threadid=1: thread exiting with uncaught exception (group=0x409e61f8)
01-02 11:08:27.324: E/AndroidRuntime(1045): FATAL EXCEPTION: main
01-02 11:08:27.324: E/AndroidRuntime(1045): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.wifiscan/com.example.wifiscan.activity_wifi_scan}: java.lang.classNotFoundException: com.example.wifiscan.activity_wifi_scan
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:1880)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread.access$600(ActivityThread.java:123)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.os.Handler.dispatchMessage(Handler.java:99)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.os.Looper.loop(Looper.java:137)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread.main(ActivityThread.java:4424)
01-02 11:08:27.324: E/AndroidRuntime(1045): at java.lang.reflect.Method.invokeNative(Native Method)
01-02 11:08:27.324: E/AndroidRuntime(1045): at java.lang.reflect.Method.invoke(Method.java:511)
01-02 11:08:27.324: E/AndroidRuntime(1045): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-02 11:08:27.324: E/AndroidRuntime(1045): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-02 11:08:27.324: E/AndroidRuntime(1045): at dalvik.system.NativeStart.main(Native Method)
01-02 11:08:27.324: E/AndroidRuntime(1045): Caused by: java.lang.classNotFoundException: com.example.wifiscan.activity_wifi_scan
01-02 11:08:27.324: E/AndroidRuntime(1045): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
01-02 11:08:27.324: E/AndroidRuntime(1045): at java.lang.classLoader.loadClass(ClassLoader.java:501)
01-02 11:08:27.324: E/AndroidRuntime(1045): at java.lang.classLoader.loadClass(ClassLoader.java:461)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
01-02 11:08:27.324: E/AndroidRuntime(1045): at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:1871)
01-02 11:08:27.324: E/AndroidRuntime(1045): ... 11 more
我的WifiScan：
public class WifiScan extends Activity implements OnClickListener {
WifiManager wifi;
ListView lv;
TextView textStatus;
Button buttonScan;
int size = 0;
List<ScanResult> results;
String ITEM_KEY = "key";
ArrayList<HashMap<String, String>> arraylist = new ArrayList<HashMap<String, String>>();
SimpleAdapter adapter;
/* Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wifi_scan);
buttonScan = (Button) findViewById(R.id.scan);
buttonScan.setonClickListener(this);
lv = (ListView)findViewById(R.id.list);
wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled() == false)
{
Toast.makeText(getApplicationContext(), "wifi is disabled..making it enabled", Toast.LENGTH_LONG).show();
wifi.setWifiEnabled(true);
}
wifi.startScan(); //js dopisal
// this.adapter = new SimpleAdapter(WiFiDemo.this, arraylist, R.layout.row, new String[] { ITEM_KEY }, new int[] { R.id.list_value });
lv.setAdapter(this.adapter);
registerReceiver(new broadcastReceiver()
{
@Override
public void onReceive(Context c, Intent intent)
{
results = wifi.getScanResults();
size = results.size();
}
}, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
}
public void onClick(View view)
{
arraylist.clear();
wifi.startScan();
Toast.makeText(this, "Scanning...." + size, Toast.LENGTH_SHORT).show();
try
{
size = size - 1;
while (size >= 0)
{
HashMap<String, String> item = new HashMap<String, String>();
item.put(ITEM_KEY, results.get(size).SSID + " " + results.get(size).capabilities);
arraylist.add(item);
size--;
adapter.notifyDataSetChanged();
}
}
catch (Exception e)
{ }
}
}
我的activity_wifi_scan.xml文件：
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/TableLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".WifiScan" >
<Button
android:id="@+id/scan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="scan"
android:text="SCAN" />
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</TableLayout>
和我的AndroidManifest文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wifiscan"
android:versionCode="1"
android:versionName="1.0" >
<uses-premission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"> </uses-permission>
<uses-permission android:name="android.permission.INTERNET"> </uses-permission>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".activity_wifi_scan">
<intent-filter>
<action android:name="android.intent.action.MAIN"></action>
<category android:name="android.intent.category.LAUNCHER"></category>
<data />
</intent-filter>
</activity>
<receiver android:name=".activity_wifi_scan">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
<action android:name="android.net.wifi.WIFI_STATE_CHANGED"/>
</intent-filter>
</receiver>
</application>
</manifest>
解决方法:
您的活动名称是WifiScan但您已将其声明为.activity_wifi_scan更改它并重试.
更改<活动>要素：
<activity android:name=".WifiScan">
<intent-filter>
<action android:name="android.intent.action.MAIN"></action>
<category android:name="android.intent.category.LAUNCHER"></category>
<data />
</intent-filter>
</activity>
android – 如何解决FATAL EXCEPTION java.lang.RuntimeException：执行doInBackground()时发生错误
我正在开发聊天相关类似的应用程序我正在使用backgrouund同步类有时强制关闭出现我正在使用.net webservices back ground我收到消息和图像后台下载过程更新到ui
错误是：
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): FATAL EXCEPTION: AsyncTask #1
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): java.lang.RuntimeException: An error occured while executing doInBackground()
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at android.os.AsyncTask$3.done(AsyncTask.java:200)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.lang.Thread.run(Thread.java:1096)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): Caused by: java.lang.indexoutofboundsexception: Invalid index 0, size is 0
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.ArrayList.throwindexoutofboundsexception(ArrayList.java:257)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.ArrayList.get(ArrayList.java:311)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at com.fitzgeraldsoftware.shout.presentationLayer.Shout$LatestMessage.doInBackground(Shout.java:1923)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at android.os.AsyncTask$2.call(AsyncTask.java:185)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-17 05:24:17.925: ERROR/AndroidRuntime(1618): ... 4 more
05-17 05:24:17.956: WARN/ActivityManager(1105): Force finishing activity com.fitzgeraldsoftware.shout.presentationLayer/.Shout
05-17 05:24:18.097: WARN/IInputConnectionWrapper(1618): showStatusIcon on inactive InputConnection
解决方法:
您抛出了Arrayindexoutofboundsexception.检查Shout.java中1923年执行的代码以获取数组访问权限.如果您尝试按索引读取超过数组大小(1)的元素,则抛出异常.例如,如果出现以下情况则抛出：
String [] strings = new String[0];
strings[0];// exception thrown!
Android-Caught a RuntimeException from the binder stub implementation.
04-08 15:13:20.997: W/Binder(1050): Caught a RuntimeException from the binder stub implementation.04-08 15:13:20.997: W/Binder(1050): java.lang.NullPointerException: Attempt to invoke virtual method ''android.view.inputmethod.InputMethodSession android.inputmethodservice.IInputMethodSessionWrapper.getInternalInputMethodSession()'' on a null object reference
04-08 15:13:20.997: W/Binder(1050): at android.inputmethodservice.IInputMethodWrapper.setSessionEnabled(IInputMethodWrapper.java:284)
04-08 15:13:20.997: W/Binder(1050): at com.android.internal.view.IInputMethod$Stub.onTransact(IInputMethod.java:129)
04-08 15:13:20.997: W/Binder(1050): at android.os.Binder.execTransact(Binder.java:404)
04-08 15:13:20.997: W/InputMethodManagerService(442): Got RemoteException sending setActive(false) notification to pid 7244 uid 10095
04-08 15:13:38.917: W/art(111): Could not get current activity
Context.startActivity 出现 AndroidRuntimeException
昨天做了一个 Activity 的启动动画，效果是点击桌面图标先出现动画后启动 Activity，今天想让其开机启动，于是我写了一个类 BootReceiver.java 用于接收开机广播，启动动画效果，代码如下：
public class BootReceiver extends BroadcastReceiver{@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if(intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
Log.d("splashscreen", "SplashScreen---------->>>>>>>>BootReceiver");
Intent splash=new Intent(context,SplashScreen.class);
context.startActivity(splash);
}
}
}
调试程序的时候发现其并未开机启动，使用 adb logcat 发现报了如下的错误。
E/JavaBinder( 2252): *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
E/JavaBinder( 2252): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?E/JavaBinder( 2252): at android.app.ContextImpl.startActivity(ContextImpl.java:622)
E/JavaBinder( 2252): at com.android.server.ConnectivityService.sendBugReportToServer(ConnectivityService.java:2055)
E/JavaBinder( 2252): at com.android.server.ConnectivityService.startUsingNetworkFeature(ConnectivityService.java:725)
E/JavaBinder( 2252): at android.net.IConnectivityManager$Stub.onTransact(IConnectivityManager.java:135)
E/JavaBinder( 2252): at android.os.Binder.execTransact(Binder.java:288)
E/JavaBinder( 2252): at dalvik.system.NativeStart.run(Native Method)
借用高人分析：
Context 中有一个 startActivity 方法，Activity 继承自 Context，重载了 startActivity 方法。如果使用 Activity 的 startActivity 方法，不会有任何限制，而如果使用 Context 的 startActivity 方法的话，就需要开启一个新的 task，遇到上面那个异常的，都是因为使用了 Context 的 startActivity 方法。解决办法是，加一个 flag。在 context.startActivity (splash) 之前加上
splash.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
这样就可以在新的 task 里面启动这个 Activity 了。
关于需要为EmptyStacks创建一个新的RunTimeException和必须为create user 指定identified by的介绍现已完结，谢谢您的耐心阅读，如果想了解更多关于Android FATAL EXCEPTION MAIN：java.lang.RuntimeException：无法启动活动ComponentInfo、android – 如何解决FATAL EXCEPTION java.lang.RuntimeException：执行doInBackground()时发生错误、Android-Caught a RuntimeException from the binder stub implementation.、Context.startActivity 出现 AndroidRuntimeException的相关知识，请在本站寻找。
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