我如何指定我在 EditText 上写的东西......！

Question

我想用自定义键盘在 EditText 上输入。假设我想写数字 1，有什么办法可以在我写完数字 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，但如果他使用退格删除任何数字，他可以再次使用已删除的数字一次。数字0-9可以这样做吗？？？？

公共类 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);
}

CustomKeyboardView.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>

Answer 1

pike 是正确的，使用 textwatcher 会帮助您，但是，要实现这一点，您可以使用一个条件来阻止应用显示已在 edittext 中的数字。

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。

Answer 2

没有办法直接从键盘禁用它。但是，您可以随时在您的edittext 上使用Textwatcher 来检查您每次更改edittext 中的文本时所写的内容。

   yourEdittext.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int start, int count, int after) {
            String oldText = yourEdittext.getText().toString();
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
          String newText = yourEdittext.getText().toString();
        }

        @Override
        public void afterTextChanged(Editable editable) {
          String newText = yourEdittext.getText().toString();
        }
    });

Answer 3

创建自定义键盘，并在按下后禁用按钮。并在 Backspace 上读取最后一个单词 Enable it back

使用 Fragment 显示或隐藏您的键盘。您将不得不覆盖编辑文本的 OnFocus 以不显示默认键盘，而是显示您的键盘。

Answer 4

通过 textwatcher 检查每一个编辑文本对于您的目的是不正确的。如果您需要一个不会在应用程序中的所有输入字段中输入某个值两次的键盘，那么您应该实现自己的键盘，就像 Shuddh 提到的那样。

这里是如何构建这种键盘的教程：

https://code.tutsplus.com/tutorials/create-a-custom-keyboard-on-android--cms-22615

请注意，有一个方法 onKey() - 你应该检查是否已经输入了值并忽略它。为了检查值，有 InputConnection 对象，它允许您访问当前活动的视图，如 edittext。