Android 在Fragment下控制輸入鍵盤

在Fragment下控制實體返回鍵

在EditTextOverWrite(客制的EditText) 狀態下，會有鍵盤彈出，在這個時候硬體控制權會被系統搶走，因此要加判斷

若該頁面沒有EditText，則無須理會IsKeyboardHidden以及其function

Java部分

private EditTextOverWrite editEmailLoginAccount,editEmailLoginPassword;
editEmailLoginAccount = (EditTextOverWrite) view.findViewById(R.id.editEmailLoginAccount);
editEmailLoginPassword = (EditTextOverWrite) view.findViewById(R.id.editEmailLoginPassword);

editEmailLoginAccount.setOnKeyboardHidden(onKeyboardHidden);
editEmailLoginPassword.setOnKeyboardHidden(onKeyboardHidden);
view.setFocusableInTouchMode(true);
        view.requestFocus();
        view.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_BACK && KeyEvent.ACTION_UP == event.getAction()) {
                    if (IsKeyboardHidden) {
                        IsKeyboardHidden = false;
                    }else {
                        imgEmailLoginBack.performClick();
                    }
                    return true;
                }
                return false;
            }
        });

    
private EditTextOverWrite.OnKeyboardHidden onKeyboardHidden = new EditTextOverWrite.OnKeyboardHidden() {
        @Override
        public void onKeyboardHidden() {
            IsKeyboardHidden = true;
            view.requestFocus();
        }
    };

Xml部分

<android2017.box.com.sports.Tools.EditTextOverWrite
            android:id="@+id/editEmailLoginAccount"
            style="@style/EditTextStyle"
            android:layout_width="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignParentStart="true"
            android:layout_below="@+id/textView2"
            android:ems="10"
            android:hint="@string/Enter_the_email_used_when_registering"
            android:inputType="textEmailAddress" />

針對EditTextOverWrite客製化的function

public class EditTextOverWrite extends EditText {
    private OnKeyboardHidden mOnKeyboardHidden;

    public EditTextOverWrite(Context context) {
        super(context);
    }

    public EditTextOverWrite(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public EditTextOverWrite(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public EditTextOverWrite(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    public interface OnKeyboardHidden {
        public void onKeyboardHidden();
    }

    public void setOnKeyboardHidden(OnKeyboardHidden action) {
        mOnKeyboardHidden = action;
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
//        Log.e("keyCode", String.valueOf(keyCode));
//        Log.e("event", String.valueOf(event));
        if (keyCode == KeyEvent.KEYCODE_BACK && KeyEvent.ACTION_UP == event.getAction()) {
//            Log.e("TEST", "OK");
            InputMethodManager imm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(getApplicationWindowToken(), 0);
            clearFocus();
            mOnKeyboardHidden.onKeyboardHidden();
        }
        return super.onKeyPreIme(keyCode, event);
    }

}