blocks|key|121240|text|与其担心键盘的问题，为什么不接受任何小写或大写的输入，并将字符串转换为大写？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|121241|下面的代码应该会有帮助：|121242|EditText+edit+=+(EditText)findViewById(R.id.myEditText);
String+input;
....
input+=+edit.getText();
input+=+input.toUpperCase();+//converts+the+string+to+uppercase|code-block|syntax|javascript|121243|这是用户友好的，因为用户不需要知道您需要大写的字符串。希望这能有所帮助。|121244|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Rather than worry about dealing with the keyboard, why not just accept any input, lowercase or uppercase and convert the string to uppercase?

The following code should help:

<pre><code>EditText edit = (EditText)findViewById(R.id.myEditText);
String input;
....
input = edit.getText();
input = input.toUpperCase(); //converts the string to uppercase
</code></pre>

This is user-friendly since it is unnecessary for the user to know that you need the string in uppercase.
Hope this helps.

blocks|key|338898|text|edittext.addTextChangedListener(new+TextWatcher()+{

++++@Override
++++public+void+onTextChanged(CharSequence+arg0,+int+arg1,+int+arg2,+int+arg3)+{++++++++++++

++++}
++++++++@Override
++++public+void+beforeTextChanged(CharSequence+arg0,+int+arg1,+int+arg2,
++++++++++++++++++++int+arg3)+{+++++++++++++
++++}
++++@Override
++++public+void+afterTextChanged(Editable+et)+{
++++++++++String+s=et.toString();
++++++if(!s.equals(s.toUpperCase()))
++++++{
+++++++++s=s.toUpperCase();
+++++++++edittext.setText(s);
++++++}
++++++editText.setSelection(editText.getText().length());
++++}
});++|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|338899|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>edittext.addTextChangedListener(new TextWatcher() {

 @Override
 public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { 

 }
 @Override
 public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
 int arg3) { 
 }
 @Override
 public void afterTextChanged(Editable et) {
 String s=et.toString();
 if(!s.equals(s.toUpperCase()))
 {
 s=s.toUpperCase();
 edittext.setText(s);
 }
 editText.setSelection(editText.getText().length());
 }
}); 
</code></pre>

blocks|key|121295|text|可以将android:textAllCaps="true"属性添加到EditText中的xml文件。这将强制softinput键盘在全大写模式下显示。您输入的值将以大写显示。但是，这并不能确保用户只能输入UpperCase字母。如果他们愿意，他们仍然可以退回到小写字母。如果您想确保Edittext的输出都是大写的，那么您必须使用String类的toUpperCase()方法手动转换输入字符串。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|121296|entityMap^0|3|Q|2U|9|3X|8|4L|6|4T|D|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|G|$]]

You can add the <code>android:textAllCaps="true"</code> property to your xml file in the EditText. This will enforce the softinput keyboard to appear in all caps mode. The value you enter will appear in Uppercase. However, this won't ensure that the user can only enter in <code>UpperCase</code> letters. If they want, they can still fall back to the lower case letters. If you want to ensure that the output of the <code>Edittext</code> is in All caps, then you have to manually convert the input String using <code>toUpperCase()</code> method of <code>String</code> class.

blocks|key|338971|text|你应该把android:inputType="textCapCharacters"和编辑文本放在xml文件中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|338972|entityMap^0|4|11|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

You should put <code>android:inputType="textCapCharacters"</code> with Edittext in xml file.

blocks|key|121345|text|只需执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|121346|//+******+Every+first+letter+capital+in+word+*********
<EditText
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"
++++android:inputType="textCapWords"
++++/>

//*****+if+all+letters+are+capital+************

++++android:inputType="textCapCharacters"|code-block|syntax|javascript|121347|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just do this:

<pre><code>// ****** Every first letter capital in word *********
&lt;EditText
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:inputType="textCapWords"
 /&gt;

//***** if all letters are capital ************

 android:inputType="textCapCharacters"
</code></pre>

blocks|key|339025|text|只需将以下代码添加到xml文件的EditText中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339026|android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZ"|code-block|syntax|javascript|339027|如果你想同时允许大写文本和数字，那么使用下面的代码。|339028|android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"|339029|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Simply, Add below code to your EditText of your xml file.

<pre><code>android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
</code></pre>

And if you want to allow both uppercase text and digits then use below code.

<pre><code>android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
</code></pre>

blocks|key|339081|text|根据被接受的答案，这个答案也是一样的，但用的是Kotlin。只是为了简化复制:·)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339082|private+fun+EditText.autocapitalize()+{
++++val+allCapsFilter+=+InputFilter.AllCaps()
++++setFilters(getFilters()+%2B+allCapsFilter)
}|code-block|syntax|javascript|339083|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Based on the accepted answer, this answer does the same, but in Kotlin. Just to ease copypasting :·)

<pre><code>private fun EditText.autocapitalize() {
 val allCapsFilter = InputFilter.AllCaps()
 setFilters(getFilters() + allCapsFilter)
}
</code></pre>

blocks|key|339110|text|使用输入筛选器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339111|editText+=+(EditText)+findViewById(R.id.enteredText);
editText.setFilters(new+InputFilter[]{new+InputFilter.AllCaps()});|code-block|syntax|javascript|339112|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use input filter 

<pre><code>editText = (EditText) findViewById(R.id.enteredText);
editText.setFilters(new InputFilter[]{new InputFilter.AllCaps()});
</code></pre>

blocks|key|339138|text|要获得所有资本，请在XML中使用以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339139|<EditText
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"
++++android:textAllCaps="true"
++++android:inputType="textCapCharacters"
/>|code-block|syntax|javascript|339140|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To get all capital, use the following in your XML:

<pre><code>&lt;EditText
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:textAllCaps="true"
 android:inputType="textCapCharacters"
/&gt;
</code></pre>

blocks|key|339182|text|Xamarin相当于ErlVolton的答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339183|editText.SetFilters(editText.GetFilters().Append(new+InputFilterAllCaps()).ToArray());|code-block|syntax|javascript|339184|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Xamarin equivalent of ErlVolton's answer:

<pre><code>editText.SetFilters(editText.GetFilters().Append(new InputFilterAllCaps()).ToArray());
</code></pre>

blocks|key|121558|text|简单的kotlin实现|type|unstyled|depth|inlineStyleRanges|entityRanges|data|121559|fun+EditText.onlyUppercase()+{
++++inputType+=+InputType.TYPE_CLASS_TEXT+or+InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS
++++filters+=+arrayOf(InputFilter.AllCaps())
}|code-block|syntax|javascript|121560|PS看起来filters一开始总是空的|offset|length|style|CODE|121561|entityMap^0|0|0|5|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Simple kotlin realization
<pre><code>fun EditText.onlyUppercase() {
 inputType = InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS
 filters = arrayOf(InputFilter.AllCaps())
}
</code></pre>
PS it seems that <code>filters</code> is always empty initially

blocks|key|339226|text|建议的解决方案的Java+1-liner可以是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339227|editText.setFilters(Lists.asList(new+InputFilter.AllCaps(),+editText.getFilters())
++++.toArray(new+InputFilter[editText.getFilters().length+%2B+1]));|code-block|syntax|javascript|339228|请注意，它需要com.google.common.collect.Lists。|offset|length|style|CODE|339229|entityMap^0|0|0|7|V|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

A Java 1-liner of the proposed solution could be:

<pre><code>editText.setFilters(Lists.asList(new InputFilter.AllCaps(), editText.getFilters())
 .toArray(new InputFilter[editText.getFilters().length + 1]));
</code></pre>

Note it needs <code>com.google.common.collect.Lists</code>.

blocks|key|339244|text|尝试使用以下任何一种代码都可以解决您的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339245|从程序上讲：|339246|editText.filters+=+editText.filters+%2B+InputFilter.AllCaps()|code-block|syntax|javascript|339247|XML：|339248|android:inputType="textCapCharacters"+with+Edittext|339249|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Try using any one of the below code may solve your issue.

programatically:

<pre><code>editText.filters = editText.filters + InputFilter.AllCaps()
</code></pre>

XML :

<pre><code>android:inputType="textCapCharacters" with Edittext
</code></pre>

blocks|key|339301|text|试试这段代码，它会让你的输入变成大写|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339302|edittext.setFilters(new+InputFilter[]+{new+InputFilter.AllCaps()});|code-block|syntax|javascript|339303|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this code it will make your input into upper case

<pre><code>edittext.setFilters(new InputFilter[] {new InputFilter.AllCaps()});
</code></pre>

blocks|key|121678|text|2021:答案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|121679|如果您想从EditTextPreference获取EditText，这是唯一的最新答案。|offset|length|style|CODE|121680|为了更改Kotlin的值或属性，您需要按照新的AndroidX+EditText设置setOnBindEditTextListener回调。|121681|findPreference<EditTextPreference>("key")?.setOnBindEditTextListener+{
++++it.filters+=+arrayOf<InputFilter>(InputFilter.AllCaps())
}|code-block|syntax|javascript|121682|entityMap^0|0|5|I|P|8|0|W|8|16|P|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@$D|X|E|Y|F|G]|$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|J|3|K|5|L|7|11|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|P|$]]

<h3>2021: Answer</h3>
This is the only latest answer if you want to get the <code>EditText</code> from <code>EditTextPreference</code>.
In order to change the <code>EditText</code> value or attributes, you need to set <code>setOnBindEditTextListener</code> callback as per the new AndroidX Kotlin.
<pre><code>findPreference&lt;EditTextPreference&gt;(&quot;key&quot;)?.setOnBindEditTextListener {
 it.filters = arrayOf&lt;InputFilter&gt;(InputFilter.AllCaps())
}
</code></pre>

In my Android application I have different <code>EditText</code> where the user can enter information. But I need to force user to write in uppercase letters.
Do you know a function to do that?

In Android EditText, how to force writing uppercase?

Xamarin

Kotlin

Java

在我的安卓应用程序中，我有不同的EditText，用户可以在其中输入信息。但我需要强制用户以大写字母书写。你知道有什么函数可以做到这一点吗？

问在Android EditText中，如何强制大写？
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问在Android EditText中，如何强制大写？
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