我想使用自定义键盘在 EditText 上输入内容。假设我想写数字1，有什么办法可以让我在写完数字1后禁用它。即使用户尝试从键盘上按数字 1，它也不会写入，但如果他使用退格键删除任何数字，他可以再次使用已删除的数字一次。是否可以对数字 0-9 执行此操作？？？
公共(public)类BasicOnKeyboardActionListener实现OnKeyboardActionListener {
private Activity mTargetActivity;
public BasicOnKeyboardActionListener(Activity targetActivity) {
mTargetActivity = targetActivity;
}
@Override
public void swipeUp() {
// TODO Auto-generated method stub
}
@Override
public void swipeRight() {
// TODO Auto-generated method stub
}
@Override
public void swipeLeft() {
// TODO Auto-generated method stub
}
@Override
public void swipeDown() {
// TODO Auto-generated method stub
}
@Override
public void onText(CharSequence text) {
// TODO Auto-generated method stub
}
@Override
public void onRelease(int primaryCode) {
// TODO Auto-generated method stub
}
@Override
public void onPress(int primaryCode) {
// TODO Auto-generated method stub
}
@Override
public void onKey(int primaryCode, int[] keyCodes) {
long eventTime = System.currentTimeMillis();
KeyEvent event = new KeyEvent(eventTime, eventTime,
KeyEvent.ACTION_DOWN, primaryCode, 0, 0, 0, 0,
KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE);
mTargetActivity.dispatchKeyEvent(event);
}
自定义KeyboardView.class
public class CustomKeyboardView extends KeyboardView {
public CustomKeyboardView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void showWithAnimation(Animation animation) {
animation.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationEnd(Animation animation) {
setVisibility(View.VISIBLE);
}
});
setAnimation(animation);
}
KeyboardWidgetTutorialActivity.class
public class KeyboardWidgetTutorialActivity extends Activity {
private CustomKeyboardView mKeyboardView;
private View mTargetView;
private Keyboard mKeyboard;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mKeyboard = new Keyboard(this, R.xml.keyboard);
mTargetView = (EditText) findViewById(R.id.target);
mTargetView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
showKeyboardWithAnimation();
return true;
}
});
mKeyboardView = (CustomKeyboardView) findViewById(R.id.keyboard_view);
mKeyboardView.setKeyboard(mKeyboard);
mKeyboardView
.setOnKeyboardActionListener(new BasicOnKeyboardActionListener(
this));
}
private void showKeyboardWithAnimation() {
if (mKeyboardView.getVisibility() == View.GONE) {
Animation animation = AnimationUtils
.loadAnimation(KeyboardWidgetTutorialActivity.this,
R.anim.slide_in_bottom);
mKeyboardView.showWithAnimation(animation);
}
@Override
public void onBackPressed() {
if (mKeyboardView.isShown()) {
mKeyboardView.setVisibility(View.GONE);
} else {
super.onBackPressed();
}
}
}
}
这是主要的 xml
<RelativeLayout android:id="@+id/LinearLayout1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:layout_width="fill_parent"
android:id="@+id/container" android:layout_alignParentTop="true"
android:layout_height="fill_parent" android:layout_above="@+id/keyboard_view">
<EditText android:layout_width="fill_parent" android:id="@+id/target"
android:layout_height="wrap_content" />
</LinearLayout>
<it.anddev.tutorial.CustomKeyboardView
android:id="@+id/keyboard_view" android:visibility="gone"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:layout_alignParentBottom="true"> </it.anddev.tutorial.CustomKeyboardView>
</RelativeLayout>
键盘 XML
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
android:keyWidth="33%p" android:horizontalGap="0px"
android:verticalGap="0px" android:keyHeight="150dip">
<Row>
<Key android:codes="8" android:keyLabel="1" android:keyEdgeFlags="left" />
<Key android:codes="9" android:keyLabel="2" />
<Key android:codes="10" android:keyLabel="3" />
<Key android:codes="67" android:keyIcon="@drawable/sym_keyboard_delete"
android:iconPreview="@drawable/sym_keyboard_delete"
android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="11" android:keyLabel="4" android:keyEdgeFlags="left" />
<Key android:codes="12" android:keyLabel="5" />
<Key android:codes="13" android:keyLabel="6" />
<Key android:codes="66" android:keyEdgeFlags="right"
android:keyIcon="@drawable/sym_keyboard_feedback_return"
android:iconPreview="@drawable/sym_keyboard_feedback_return" />
</Row>
<Row>
<Key android:codes="14" android:keyLabel="7" android:keyEdgeFlags="left" />
<Key android:codes="15" android:keyLabel="8" />
<Key android:codes="16" android:keyLabel="9" android:keyEdgeFlags="right" />
<Key android:codes="7" android:keyLabel="0" />
</Row>
</Keyboard>
最佳答案
pike 是正确的，使用 textwatcher 会帮助您，但是，要实现此目的，您可以使用一个条件来阻止应用程序显示编辑文本中已有的数字。
编辑:
String textContainer = "";
int length = 0;
int prevLength = 0;
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int start, int count, int after) {
textContainer = s.toString();
prevLength = s.length();
}
@Override
public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable editable) {
length = s.length();
if(!textContainer.isEmpty()){
if(s.length() > 1) {
if(prevLength < length) {
if (!textContainer.contains(s.toString().subSequence(length - 1, length))) {
length = s.length();
} else {
phoneNumberEditText.getText().delete(length - 1, length);
}
}
}
}else{
textContainer = s.toString();
}
}
});
尚未对此进行测试，但这应该会给您一个想法。
关于android - 我如何指定我在 EditText 上写的内容......!，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39872080/