我是一个为情人节创建应用程序的任务,我正在制作情书生成器。我只能使用一个活动,所以我创建了一个textview集可见性。情书有点长,所以我想要滚动视图。添加崩溃的应用程序。请帮忙
<EditText
android:id="@+id/ename"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="42dp"
android:hint="@string/name"
android:inputType="textPersonName" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/epname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/ename"
android:layout_centerHorizontal="true"
android:layout_marginTop="42dp"
android:hint="@string/pname" >
</EditText>
<Button
android:id="@+id/bnext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:text="@string/nxt" />
<Button
android:id="@+id/email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="@string/Email"
android:visibility="invisible" />
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext"
android:visibility="gone" />
<TextView
android:id="@+id/prmt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/epname"
android:layout_marginTop="42dp"
android:text="@string/Prompt"
android:textSize="20sp" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/prmt"
android:layout_marginTop="22dp"
android:entries="@array/opts" />
这很好用 我将滚动视图添加到文本view1
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext" >
<TextView
android:id="@+id/textView1"
android:visibility="gone" />
</ScrollView>
这次崩溃。 logcat的
> 02-03 12:14:05.191: E/AndroidRuntime(30264): FATAL EXCEPTION: main
02-03 12:14:05.191: E/AndroidRuntime(30264): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.assignment3/com.example.assignment3.MainActivity}: java.lang.RuntimeException: Binary XML file line #63: You must supply a layout_width attribute.
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2253)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2288)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread.access$600(ActivityThread.java:144)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1290)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.os.Handler.dispatchMessage(Handler.java:99)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.os.Looper.loop(Looper.java:156)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread.main(ActivityThread.java:5109)
02-03 12:14:05.191: E/AndroidRuntime(30264): at java.lang.reflect.Method.invokeNative(Native Method)
02-03 12:14:05.191: E/AndroidRuntime(30264): at java.lang.reflect.Method.invoke(Method.java:511)
02-03 12:14:05.191: E/AndroidRuntime(30264): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:991)
02-03 12:14:05.191: E/AndroidRuntime(30264): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)
02-03 12:14:05.191: E/AndroidRuntime(30264): at dalvik.system.NativeStart.main(Native Method)
02-03 12:14:05.191: E/AndroidRuntime(30264): Caused by: java.lang.RuntimeException: Binary XML file line #63: You must supply a layout_width attribute.
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:5665)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:5786)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.widget.LinearLayout$LayoutParams.<init>(LinearLayout.java:1776)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:1700)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:56)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.rInflate(LayoutInflater.java:741)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
02-03 12:14:05.191: E/AndroidRuntime(30264): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:276)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.Activity.setContentView(Activity.java:1897)
02-03 12:14:05.191: E/AndroidRuntime(30264): at com.example.assignment3.MainActivity.onCreate(MainActivity.java:28)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.Activity.performCreate(Activity.java:4543)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071)
02-03 12:14:05.191: E/AndroidRuntime(30264): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
02-03 12:14:05.191: E/AndroidRuntime(30264): ... 11 more
TIA
答案 0 :(得分:5)
您收到该错误是因为您没有为width
提供任何height
和TextView
在你的布局中。布局应该是这样的
<ScrollView
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:visibility="gone"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</ScrollView>
android:visibility="gone"
为parent LinearLayout
答案 1 :(得分:2)
滚动视图必须包含所有子视图的父视图组。文本视图不是视图组。将“线性布局”或“相对布局”添加为“滚动视图”内部文本视图的父级。有关详细信息,请参阅此http://developer.android.com/reference/android/widget/ScrollView.html。使用以下布局,您的问题将得到解决。
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView1"
android:visibility="gone" />
</LinearLayout>
</ScrollView>
答案 2 :(得分:1)
AFAIK您必须在ScrollView
内找到一个视图,但您无法直接在ScrollView
内添加视图,而您需要添加一些布局,即LinearLayout
,RelativeLayout
..在你的ScrollView
和你的布局中,你可以添加你的观点。
不允许在ScrollView
中添加直接子广告或视图。
尝试如下:
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext" >
<RelativeLayout
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
>
<TextView
android:id="@+id/textView1"
android:visibility="gone" />
</RelativeLayout>
</ScrollView>
答案 3 :(得分:1)
在编码中添加它将起作用
<ScrollView
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_above="@id/bnext"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignStart="@id/bnext" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical|center_horizontal"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</ScrollView>