不能添加文本框到Android应用 [英] Cannot add textfield to android application
本文介绍了不能添加文本框到Android应用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经写在Eclipse / Android的一些小的应用程序，所以我不是全新整个EDI。
i have written a few small apps in Eclipse/Android, so i am not totally new to the whole edi.
我在我家（登录屏幕和一个或2个）创造了几个屏幕和应用程序工作正常，现在我想建立在同一个屏幕在工作中我不能将任意文本控制到应用程序页面，它给我TEH以下错误，屏幕一直空白？下面是我的XML和错误给出：
i created a few screens at my home ( a login screen and one or 2 more) and the application worked fine, now that i want to build the same screen at work i cant drag any text control onto the application page, it gives me teh below error and the screen stays blank? below is my XMl and error given :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoginScreen" >
<EditText
android:id="@+id/textboxUserName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="121dp"
android:ems="10"
android:hint="@string/blankstring"
android:text="@string/blankstring" />
<TextView
android:id="@+id/labelusername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textboxUserName"
android:layout_alignLeft="@+id/textboxUserName"
android:layout_marginBottom="39dp"
android:hint="@string/LblUsername"
android:text="@string/LblUsername"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/btnLogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/passwordboxPassword"
android:layout_alignRight="@+id/passwordboxPassword"
android:layout_below="@+id/passwordboxPassword"
android:layout_marginTop="19dp"
android:focusable="false"
android:hint="@string/btnLogin"
android:text="@string/btnLogin" />
<TextView
android:id="@+id/labelpassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textboxUserName"
android:layout_below="@+id/textboxUserName"
android:layout_marginTop="21dp"
android:hint="@string/LblPassword"
android:text="@string/LblPassword"
android:textAppearance="?android:attr/textAppearanceLarge" />
<requestFocus />
<EditText
android:id="@+id/passwordboxPassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/labelpassword"
android:layout_below="@+id/labelpassword"
android:ems="10"
android:hint="@string/blankstring"
android:inputType="textPassword"
android:text="@string/blankstring" >
</EditText>
<TextView
android:id="@+id/lblnewuser"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btngooglelogin"
android:layout_centerHorizontal="true"
android:layout_marginTop="51dp"
android:text="@string/lblNewUser"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/btnRegister"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/btnLogin"
android:layout_alignRight="@+id/btnLogin"
android:layout_below="@+id/lblnewuser"
android:layout_marginTop="11dp"
android:text="@string/btnRegister" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/labelusername"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:contentDescription="@string/blankstring"
android:src="@drawable/logo" />
<ImageButton
android:id="@+id/btnfacebooklogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/lblnewuser"
android:layout_marginRight="24dp"
android:layout_toLeftOf="@+id/imageView1"
android:background="@android:color/transparent"
android:contentDescription="@string/blankstring"
android:src="@drawable/facebookloginicon" />
<ImageButton
android:id="@+id/btngooglelogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/labelpassword"
android:layout_below="@+id/btnLogin"
android:layout_marginRight="24dp"
android:layout_marginTop="15dp"
android:background="@android:color/transparent"
android:contentDescription="@string/blankstring"
android:scaleType="fitCenter"
android:src="@drawable/gplusloginpiclarge" />
</RelativeLayout>
和错误是：
java.lang.NoSuchMethodError: java.lang.System.arraycopy([CI[CII)V
at android.text.SpannableStringBuilder.getChars(SpannableStringBuilder.java:916)
at android.text.TextUtils.getChars(TextUtils.java:79)
at android.text.method.ReplacementTransformationMethod$ReplacementCharSequence.getChars(ReplacementTransformationMethod.java:151)
at android.text.TextUtils.getChars(TextUtils.java:79)
at android.text.MeasuredText.setPara(MeasuredText.java:106)
at android.text.StaticLayout.generate(StaticLayout.java:239)
at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
at android.text.DynamicLayout.<init>(DynamicLayout.java:170)
at android.widget.TextView.makeSingleLayout(TextView.java:6134)
at android.widget.TextView.makeNewLayout(TextView.java:6032)
at android.widget.TextView.onMeasure(TextView.java:6389)
at android.view.View.measure(View.java:16648)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:337)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16648)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:847)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16648)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.measureView(RenderSessionImpl.java:619)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:519)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:339)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:332)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:517)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1584)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1309)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.onXmlModelChanged(GraphicalEditorPart.java:1267)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegateXmlModelChanged(LayoutEditorDelegate.java:402)
at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.xmlModelChanged(CommonXmlEditor.java:329)
at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor$XmlModelStateListener.modelChanged(AndroidXmlEditor.java:1653)
at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor.wrapEditXmlModel(AndroidXmlEditor.java:1114)
at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor.wrapUndoEditXmlModel(AndroidXmlEditor.java:1190)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.MoveGesture.drop(MoveGesture.java:396)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GestureManager$CanvasDropListener.drop(GestureManager.java:679)
at org.eclipse.swt.dnd.DNDListener.handleEvent(DNDListener.java:91)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:782)
at org.eclipse.swt.dnd.DropTarget.Drop(DropTarget.java:456)
at org.eclipse.swt.dnd.DropTarget.Drop_64(DropTarget.java:392)
at org.eclipse.swt.dnd.DropTarget$3.method6(DropTarget.java:260)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:119)
at org.eclipse.swt.internal.ole.win32.COM.DoDragDrop(Native Method)
at org.eclipse.swt.dnd.DragSource.drag(DragSource.java:363)
at org.eclipse.swt.dnd.DragSource.access$0(DragSource.java:289)
at org.eclipse.swt.dnd.DragSource$1.handleEvent(DragSource.java:172)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
和我的屏幕是看我下面的图片空白：
and my screen is blank as seen i picture below :
我失去了一个参考？我应该安装什么东西？我不知道什么是错在这里，很明显，我可以在应用程序上传到我的手机，但它立刻崩溃
am I missing a reference?? should I install something else? I have no idea what is wrong here, and obviously I can upload the app to my phone but it crashes immediately
推荐答案
点击绿色的Android图标（Android版本呈现在Eclipse中的布局时使用），并选择API 19：安卓4.4.2 API，而不是20： Android的4.4W。这将解决这个问题。
Click on the green Android icon ("Android version to use when rendering layouts in Eclipse") and select API 19: Android 4.4.2 instead of API 20: Android 4.4W. This will fix the problem.
请检查这个答案太
这篇关于不能添加文本框到Android应用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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