我想知道是否有一种方法来处理用户在输入EditText时按下Enter,就像onSubmit HTML事件。
还想知道是否有一种方法来操纵虚拟键盘,以这样的方式,“完成”按钮被标记为其他的东西(例如“Go”),并在单击时执行特定的动作(再次,像onSubmit)。
我想知道是否有一种方法来处理用户在输入EditText时按下Enter,就像onSubmit HTML事件。
还想知道是否有一种方法来操纵虚拟键盘,以这样的方式,“完成”按钮被标记为其他的东西(例如“Go”),并在单击时执行特定的动作(再次,像onSubmit)。
当前回答
检测回车键被按下的最简单的方法是:
mPasswordField.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (event!= null) { // KeyEvent: If triggered by an enter key, this is the event; otherwise, this is null.
signIn(mEmailField.getText().toString(), mPasswordField.getText().toString());
return true;
} else {
return false;
}
}
});
其他回答
这在LG安卓手机上运行良好。它防止ENTER和其他特殊字符被解释为普通字符。“下一步”或“完成”按钮自动出现,“ENTER”按预期工作。
edit.setInputType(InputType.TYPE_CLASS_TEXT);
检测回车键被按下的最简单的方法是:
mPasswordField.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (event!= null) { // KeyEvent: If triggered by an enter key, this is the event; otherwise, this is null.
signIn(mEmailField.getText().toString(), mPasswordField.getText().toString());
return true;
} else {
return false;
}
}
});
本页详细描述了如何做到这一点。
https://developer.android.com/training/keyboard-input/style.html
设置android:imeOptions,然后检查onEditorAction中的actionId。因此,如果你设置imeOptions为“actionDone”,那么你会检查“actionId == EditorInfo”。onEditorAction中的IME_ACTION_DONE `。另外,确保设置android:inputType。
如果使用材质设计,将代码放在TextInputEditText中。
下面是上面链接的例子中的EditText:
<EditText
android:id="@+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/search_hint"
android:inputType="text"
android:imeOptions="actionSend" />
您还可以使用setImeOptions(int)函数以编程方式设置此选项。下面是上面链接的例子中的OnEditorActionListener:
EditText editText = (EditText) findViewById(R.id.search);
editText.setOnEditorActionListener(new OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
boolean handled = false;
if (actionId == EditorInfo.IME_ACTION_SEND) {
sendMessage();
handled = true;
}
return handled;
}
});
好吧,如果这些答案都对你不起作用,你还没生气,我有一个解决办法。 使用AppCompatMultiAutoCompleteTextView(是的!)而不是EditText与以下代码(kotlin)
val filter = InputFilter { source, start, end, _, _, _ ->
var keepOriginal = true
val sb = StringBuilder(end - start)
for (i in start until end) {
val c = source[i]
if (c != '\n')
sb.append(c)
else {
keepOriginal = false
//TODO:WRITE YOUR CODE HERE
}
}
if (keepOriginal) null else {
if (source is Spanned) {
val sp = SpannableString(sb)
TextUtils.copySpansFrom(source, start, sb.length, null, sp, 0)
sp
} else {
sb
}
}
}
appCompatMultiAutoCompleteTextView.filters = arrayOf(filter);
它(可能)适用于所有设备,我在android 4.4和10上测试了它。它在小米中也起作用。 我他妈的♥机器人:)
A dependable way to respond to an <enter> in an EditText is with a TextWatcher, a LocalBroadcastManager, and a BroadcastReceiver. You need to add the v4 support library to use the LocalBroadcastManager. I use the tutorial at vogella.com: 7.3 "Local broadcast events with LocalBroadcastManager" because of its complete concise code Example. In onTextChanged before is the index of the end of the change before the change>;minus start. When in the TextWatcher the UI thread is busy updating editText's editable, so we send an Intent to wake up the BroadcastReceiver when the UI thread is done updating editText.
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.text.Editable;
//in onCreate:
editText.addTextChangedListener(new TextWatcher() {
public void onTextChanged
(CharSequence s, int start, int before, int count) {
//check if exactly one char was added and it was an <enter>
if (before==0 && count==1 && s.charAt(start)=='\n') {
Intent intent=new Intent("enter")
Integer startInteger=new Integer(start);
intent.putExtra("Start", startInteger.toString()); // Add data
mySendBroadcast(intent);
//in the BroadcastReceiver's onReceive:
int start=Integer.parseInt(intent.getStringExtra("Start"));
editText.getText().replace(start, start+1,""); //remove the <enter>
//respond to the <enter> here