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
首先,您必须设置EditText监听按键
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set the EditText listens to key press
EditText edittextproductnumber = (EditText) findViewById(R.id.editTextproductnumber);
edittextproductnumber.setOnKeyListener(this);
}
其次,定义按键时的事件,例如,设置TextView的文本的event:
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
// Listen to "Enter" key press
if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER))
{
TextView textviewmessage = (TextView) findViewById(R.id.textViewmessage);
textviewmessage.setText("You hit 'Enter' key");
return true;
}
return false;
}
最后,不要忘记在顶部导入EditText,TextView,OnKeyListener,KeyEvent:
import android.view.KeyEvent;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.TextView;
其他回答
I had a similar purpose. I wanted to resolve pressing the "Enter" key on the keyboard (which I wanted to customize) in an AutoCompleteTextView which extends TextView. I tried different solutions from above and they seemed to work. BUT I experienced some problems when I switched the input type on my device (Nexus 4 with AOKP ROM) from SwiftKey 3 (where it worked perfectly) to the standard Android keyboard (where instead of handling my code from the listener, a new line was entered after pressing the "Enter" key. It took me a while to handle this problem, but I don't know if it will work under all circumstances no matter which input type you use.
这是我的解决方案:
在xml中设置TextView的输入类型属性为"text":
android:inputType="text"
自定义键盘上“Enter”键的标签:
myTextView.setImeActionLabel("Custom text", KeyEvent.KEYCODE_ENTER);
将OnEditorActionListener设置为TextView:
myTextView.setOnEditorActionListener(new OnEditorActionListener()
{
@Override
public boolean onEditorAction(TextView v, int actionId,
KeyEvent event)
{
boolean handled = false;
if (event.getAction() == KeyEvent.KEYCODE_ENTER)
{
// Handle pressing "Enter" key here
handled = true;
}
return handled;
}
});
我希望这能帮助其他人避免我遇到的问题,因为它们几乎把我逼疯了。
这应该可以
input.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
if( -1 != input.getText().toString().indexOf( "\n" ) ){
input.setText("Enter was pressed!");
}
}
});
将“txtid”替换为您的EditText ID。
EditText txtinput;
txtinput=findViewById(R.id.txtid)
txtinput.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) || (actionId == EditorInfo.IME_ACTION_DONE)) {
//Code for the action you want to proceed with.
InputMethodManager inputManager = (InputMethodManager)
getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
}
return false;
}
});
下面是一个简单的静态函数,您可以将它扔到Utils或keyboard类中,当用户敲击硬件或软件键盘上的返回键时,它将执行代码。这是@earlcasper精彩回答的修改版
/**
* Return a TextView.OnEditorActionListener that will execute code when an enter is pressed on
* the keyboard.<br>
* <code>
* myTextView.setOnEditorActionListener(Keyboards.onEnterEditorActionListener(new Runnable()->{
* Toast.makeText(context,"Enter Pressed",Toast.LENGTH_SHORT).show();
* }));
* </code>
* @param doOnEnter A Runnable for what to do when the user hits enter
* @return the TextView.OnEditorActionListener
*/
public static TextView.OnEditorActionListener onEnterEditorActionListener(final Runnable doOnEnter){
return (__, actionId, event) -> {
if (event==null) {
if (actionId == EditorInfo.IME_ACTION_DONE) {
// Capture soft enters in a singleLine EditText that is the last EditText.
doOnEnter.run();
return true;
} else if (actionId==EditorInfo.IME_ACTION_NEXT) {
// Capture soft enters in other singleLine EditTexts
doOnEnter.run();
return true;
} else {
return false; // Let system handle all other null KeyEvents
}
} else if (actionId==EditorInfo.IME_NULL) {
// Capture most soft enters in multi-line EditTexts and all hard enters.
// They supply a zero actionId and a valid KeyEvent rather than
// a non-zero actionId and a null event like the previous cases.
if (event.getAction()==KeyEvent.ACTION_DOWN) {
// We capture the event when key is first pressed.
return true;
} else {
doOnEnter.run();
return true; // We consume the event when the key is released.
}
} else {
// We let the system handle it when the listener
// is triggered by something that wasn't an enter.
return false;
}
};
}
添加这些依赖项,应该可以工作:
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;