处理键盘输入

我会带着你远行 2022-07-16 13:23 277阅读 0赞

# 指定键盘类型 #

EditText editText = (EditText) findViewById(R.id.search);
    
    //显示密码框内容 
    editText.setInputType(InputType.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_NORMAL);  
    
    //隐藏密码框内容 
    editText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); 
    
    editText.setImeOptions(EditorInfo.IME_ACTION_GO);
    
    //设置光标位置在文本框末尾
    editText.setSelection(mEditPwd.getText().toString().length());
    
    //show the password
    editText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
    //hide the password
    editText.setTransformationMethod(PasswordTransformationMethod.getInstance());
    
    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;
        }
    });

# 将输入到 EditText 中的小写字母转化为大写字母 #

//----------------小写转化为大写--------------------------//
        public class InputLowerToUpper extends ReplacementTransformationMethod{  
            @Override 
            protected char[] getOriginal() { 
                char[] lower = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z' }; 
                return lower; 
            } 
    
            @Override 
            protected char[] getReplacement() { 
                char[] upper = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z' }; 
                return upper; 
            } 
    
        }

final EditText textCarNumber=(EditText) viewNew.findViewById(R.id.borrow_carnumber);
            textCarNumber.setTransformationMethod(new InputLowerToUpper());

# 在Activity启动时显示输入法 #

android:windowSoftInputMode="stateVisible"

# InputMethodManager #

public void showSoftKeyboard(View view) {
        if (view.requestFocus()) {
            InputMethodManager imm = (InputMethodManager)
                    getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
        }
    }

# 指定 UI 的响应方式 #

android:windowSoftInputMode = "adjust"
    android:windowSoftInputMode="adjustResize"

# 处理单个按键事件 #

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_D:
                moveShip(MOVE_LEFT);
                return true;
            case KeyEvent.KEYCODE_F:
                moveShip(MOVE_RIGHT);
                return true;
            case KeyEvent.KEYCODE_J:
                fireMachineGun();
                return true;
            case KeyEvent.KEYCODE_K:
                fireMissile();
                return true;
            default:
                return super.onKeyUp(keyCode, event);
        }
    }

# 处理修饰键 #

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        switch (keyCode) {
            ...
            case KeyEvent.KEYCODE_J:
                if (event.isShiftPressed()) {
                    fireLaser();
                } else {
                    fireMachineGun();
                }
                return true;
            case KeyEvent.KEYCODE_K:
                if (event.isShiftPressed()) {
                    fireSeekingMissle();
                } else {
                    fireMissile();
                }
                return true;
            default:
                return super.onKeyUp(keyCode, event);
        }
    }