I am trying to create a calculator app on android studio but I can't figure out how to adjust the numbers which users types into the calculator and which are shown on their screen according to their screen size. I want the numbers to have enough space for longer equations and also for everything to look proportional. I have tried adding textview autosize to my code:
app:autoSizeTextType="uniform"
app:autoSizeMinTextSize="12sp"
app:autoSizeMaxTextSize="55sp"
android:autoSizeStepGranularity="2sp"
but this does not adjust the text size according to the screen size.
What is the most appropriate code to add to my app to solve this problem?
Here is the code for my output section.
<TextView
android:id="#+id/tvmain"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#000"
android:text=""
android:textColor="#fff"
app:autoSizeTextType="uniform"
app:autoSizeMinTextSize="12sp"
app:autoSizeMaxTextSize="55sp"
android:autoSizeStepGranularity="2sp"
android:textAlignment="viewEnd"
android:padding="10dp"
android:gravity="bottom"
android:maxLines="1"
android:layout_weight="2">
</TextView>
If anymore information is needed to help me in solving this problem then please let me know.
Is there a way to auto adjust the text size of a button to be the biggest it can be while stayinh one line, and still fit in the button?
Have a look at Autosizing TextViews (provides support to API level 14).
For example
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="1"
android:text="Some text"
app:autoSizeTextType="uniform" />
The key property here is app:autoSizeTextType
How would I make an multi-line EditText with a vertical scroll bar go down to a certain spot? I want to do this inside of the Java code, and I'd prefer to do it with an EditText, but I'd be willing to use a ScrollView if I need to.
The EditText XML:
<EditText
android:id="#+id/theTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="textAutoCorrect|textMultiLine"
android:scrollbars="vertical"
android:width="0dp" >
You can try using scrollTo api from the view.
I would like the items in a ListView in my android app to contain a check box on the left, followed by some text, followed by a button. I would like the check box and button to be baseline aligned with the text. To achieve this, I put all three in a LinearLayout which tries to baseline align its items by default. This works great, except that the bottom line of multi-line text is always clipped.
Here is an example of how it looks:
There is a related question on StackOverflow with the proposed solution to be to set layout_gravity = "fill" for the TextView, but that defeats the purpose as it disables the baseline align. Is there any solution to this problem that allows me to preserve the baseline align? This seems like a pretty basic problem that surely many people must encounter.
The only other solution I've found is to add some padding to the bottom of the text view, but this seems hacky and not robust against font sizes. I could set the padding procedurally from code based on the font size, but it seems like it may be tricky to get the correct values.
Here is a sample layout that illustrates the problem:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="8dp"
android:paddingTop="8dp"
android:baselineAligned="true">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="9dp"
android:layout_marginRight="8dp"
android:textSize="16sp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Woah, this is a long text line, enough that tit has to wrap to multiple lines, thus demonstrating our problem. In fact, it wraps to multiple lines! So many lines! I hope they all show up correctly!"
android:textSize="16sp"/>
<FrameLayout
android:layout_width="40dp"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="12dp"
android:src="#drawable/ic_note_check_delete"/>
</FrameLayout>
</LinearLayout>
I've got an Arabic Android application, and here is the XML code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/greygradientbackground">
<ImageView android:id="#+id/logo"
android:layout_width="150dp"
android:layout_height="fill_parent"
android:scaleType="centerCrop"
android:layout_margin="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true" />
<TextView android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#000000"
android:layout_gravity="center_vertical|right"
android:gravity="right"
android:layout_toLeftOf="#id/logo"/>
</RelativeLayout>
The problem is that android:gravity works on some Android models and on others don't.
To be more specific, I've tested the app on many 2.3.3 android devices and the Arabic text is aligned right. However on other 2.3.3 devices the Arabic text is aligned left (which is wrong).
When I changed android:gravity="right" to android:gravity="left" the problem shifted from the second group of devices to the first.
So my question is how can I solve this issue especially that as far as I know there aren't a way to localize layouts based on a device model number.
Thanks in advance for any guidance because am totally lost. :(
UPDATE:
I searched about "How to align Arabic correctly on all Android versions?" but found nothing working on all my testing devices. Any suggestions please? I am sure there is a best practice approach for aligning Arabic text on Android.
UPDATE 2:
I tried to use a WebView instead of a TextView to align Arabic correctly using CSS styles. However, the Arabic text is showing in the WebView as strange characters.
Here is the Code:
mWebView.loadData("<html dir=\"rtl\">الأسم<body></body></html>", "text/html", "UTF-8");
The strange thing is that Arabic websites text is displayed correctly. So, what's the problem? :(
This is an expected behaviour. You may not use gravity="right", but gravity="end" instead, the same idea you apply to gravity="left" which you may use gravity="start", as well as layout_marginStart instead of layout_marginLeft
This way, Android will put the text to the "start" orientation, depending on the location. (for us, americans, we start to write from the left and we end on the right, but arabians start from the right and end on the left).
You can get the layout/text directions with the method getLayoutDirectionFromLocale(null), this will return View.LAYOUT_DIRECTION_LTR (left-to-right) or View.LAYOUT_DIRECTION_RTL (right-to-left, like arabic).
More info you can check here
change your textveiw in the layout to this....
<TextView android:id="#+id/title"
change your layout_width to "fill_parent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#000000"
android:layout_gravity="center_vertical|right"
android:gravity="right"
android:layout_toLeftOf="#id/logo"
/>
You can change the thing in another way also....You can make changes in the activity class..as follows...let your TextView with id title is mapped in the activity class with a TextView object named "tv" the you can make it right aligned by writing this.
tv.setGravity(Gravity.RIGHT);
but in both the cases the width layout width should be "fill_parent"..
If you do not do this and keep it "wrap_content" then there is no space for the text to move... all the alignments (center,left,right...)remain the same.....
If both of these donot work out... then I would prefer you to use table layout and keep the text view in it....
try putting your textview inside a separate LinearLayout ,and set that layouts properties likethis:
android:layout_gravity="center_vertical" and android:orientation="vertical"
android:gravity="right"
note: dont specify layout_gravity of the textview.
hope this helps! it worked fine for me.
also you can try the solution provided here: Android Arabic text aligment
Another solution to achieve such behavior:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layoutDirection="ltr"
android:layout_weight="1"
android:gravity="end"
android:padding="16dp"
android:text="#string/locale_switch_btn" />
</LinearLayout>
Note that, for correct gravity="end" alignment, in rtl locales you should set property:
android:layoutDirection="ltr"