问题
You can see my scrollview being displayed the same in jellybean, & kitkat, very awesome:
But I am shocked to see the same thing in lower versions like 2.2, 2.3.3
It seems that it display some portion of text attached to upper & bottom portion of screen.
BTW, The lines in middle are just the textviews with gray background .
You can see my xml code, sorry its a little long code
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/stars"
android:padding="5dp"
android:scrollbars="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:textColor="#fff"
android:hint="Type your Full Name here"
android:inputType="textPersonName"
android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz " >
<requestFocus />
</EditText>
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:background="#330000"
android:onClick="showresult"
android:textColor="#ffffff"
android:alpha=".8"
android:text="Show My Fortune" />
<TextView
android:id="@+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceSmall" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:baselineAligned="false">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal"
>
<TextView
android:id="@+id/textView1"
android:layout_width="20dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp"
/>
<TextView
android:id="@+id/textView2"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1" >
<TextView
android:id="@+id/textView3"
android:layout_width="20dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp" />
<TextView
android:id="@+id/textView4"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="1" >
<TextView
android:id="@+id/textView5"
android:layout_width="20dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp"/>
<TextView
android:id="@+id/textView6"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="@+id/textView7"
android:layout_width="match_parent"
android:layout_height=".5dp"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceSmall" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
<TextView
android:id="@+id/textView14"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:gravity="right"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
<TextView
android:id="@+id/textView15"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:gravity="right"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
<TextView
android:id="@+id/textView16"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:gravity="right"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<TextView
android:id="@+id/textView12"
android:layout_width="match_parent"
android:layout_height=".5dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView18"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<TextView
android:id="@+id/textView19"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textView20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff0000"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView21"
android:layout_width="40dp"
android:layout_height="wrap_content"
android:gravity="right"
android:textColor="#ff0000"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView22"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff00"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView23"
android:layout_width="40dp"
android:layout_height="wrap_content"
android:textColor="#ff0000"
android:gravity="right"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView24"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffff00"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/textView25"
android:layout_width="40dp"
android:layout_height="wrap_content"
android:gravity="right"
android:textColor="#ff0000"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView29"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffff00"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</LinearLayout>
</ScrollView>
Also in GraphicalLayout is shows this warning :
I hope I explained my problem clearly !
Looking for a answer,
Thanks in advance
UPDATE: After @semsamot answer the above warning was disappeared, but the problem is still not solved.
Sorry, my above code was too long but I have another layout in my app displaying the same problem
Consider this code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
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"
android:background="@drawable/stars"
tools:context="com.vivekwarde.numerologyfortune.MyLuckyNumber"
>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="60dp"
android:textColor="#fff"
android:gravity="center"
android:onClick="showDatePickerDialog"
android:text="Birthdate ?"
android:background="#4c0000" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:textColor="#ffffff"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
If I display this layout simply it displays as expected in jelly bean & kitkat like this
But see this output in 2.2 & 2.3.3
Why the text in TextView does not display properly as expected. ?
回答1:
Don't use float values that lower than 1 in this format: ".x" Instead use this format: "0.x"
If you change those values you see the warnings disappear!
Note: Also note that "alpha" attribute introduced in API Level 11 so it will not work in lower API(s).
回答2:
I don't think it'll work but u should try it once.
instead of using android:layout_height="60dp" use maxHeight and minHeight with same value 60dp as ur case .I think it will solve your problem.And also fill some background color to see whats wrong with the soln.
回答3:
Don't use wrap_content for the ScrollView. The ScrollView should have a concrete size which is relate with the screen size, not the content. The LinearLayout inside it should keep the wrap_content. In both your examples, you should use match_parent for the ScrollView
回答4:
don`t use .5dp while setting height or width
<TextView android:id="@+id/textView7" android:layout_width="match_parent" android:layout_height=".5dp" // **modify** this to android:layout_height="1dp" android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textView12"
android:layout_width="match_parent"
android:layout_height=".5dp" // **modify** this to android:layout_height="1dp" />
Using this you can remove this error requestfocus does not set the required layout_height attribute and also might be you can solve your issue also
来源：https://stackoverflow.com/questions/25139656/scrollview-doesnt-display-its-content-properly-in-lower-versions-of-android