package com.huyu.test;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;

import android.app.Activity;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.Keyboard.Key;
import android.inputmethodservice.KeyboardView;
import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;
import android.text.Editable;
import android.text.InputType;
import android.view.View;
import android.view.WindowManager;
import android.widget.EditText;

public class KeyboardUtil {
	private KeyboardView keyboardView;
	private Keyboard k1;// 字母鍵盤
	private Keyboard k2;// 數字鍵盤
	public boolean isnun = false;// 是否資料鍵盤
	public boolean isupper = false;// 是否大寫
	public boolean isShow = false;// 是否顯示
	

	private EditText ed;

	public KeyboardUtil(EditText edit) {
		this.ed = edit;
		Activity act = (Activity) this.ed.getContext();
		k1 = new Keyboard(act, R.xml.letter);
		k2 = new Keyboard(act, R.xml.symbol);
		
		keyboardView = (KeyboardView) act.findViewById(R.id.keyboard_view);
		keyboardView.setKeyboard(k2);
		keyboardView.setEnabled(true);
		keyboardView.setPreviewEnabled(true);//設定鍵盤提示的view  
		keyboardView.setOnKeyboardActionListener(listener);
		
		setSoftKeyboradHide(act, edit);
	}

	/**
	 * 這是在處理光標出現的問題
	 * @param ctx
	 * @param edit
	 */
	private void setSoftKeyboradHide(Activity ctx,EditText edit){
//		if (android.os.Build.VERSION.SDK_INT <= 10) { 
//			edit.setInputType(InputType.TYPE_NULL); 
//		} else {
			ctx.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); 
			try { 
				Class cls = EditText.class; 
				Method setShowSoftInputOnFocus = null; 
				String  method_setSoftInputOnFocus = "setShowSoftInputOnFocus";
				//4.0的是setShowSoftInputOnFocus,4.2的是setSoftInputOnFocus	
				if(android.os.Build.VERSION.SDK_INT>16) {
					method_setSoftInputOnFocus = "setSoftInputOnFocus";
				}
				setShowSoftInputOnFocus = cls.getMethod(method_setSoftInputOnFocus, boolean.class); 
				setShowSoftInputOnFocus.setAccessible(false); 
				setShowSoftInputOnFocus.invoke(edit, false); 
			} catch (Exception e) { 
				e.printStackTrace(); 
			}
//		}
	}

	private OnKeyboardActionListener listener = new OnKeyboardActionListener() {
		@Override
		public void swipeUp() {
		}

		@Override
		public void swipeRight() {
		}

		@Override
		public void swipeLeft() {
		}

		@Override
		public void swipeDown() {
		}

		@Override
		public void onText(CharSequence text) {
		}

		@Override
		public void onRelease(int primaryCode) {
		}

		@Override
		public void onPress(int primaryCode) {
			checkIShowPrewiew(primaryCode);
		}

		@Override
		public void onKey(int primaryCode, int[] keyCodes) {
			checkIShowPrewiew(primaryCode);
			
			Editable editable = ed.getText();
			int start = ed.getSelectionStart();
			if (primaryCode == Keyboard.KEYCODE_CANCEL) {// 完成
				hideKeyboard();
			} else if (primaryCode == Keyboard.KEYCODE_DELETE) {// 刪除
				if (editable != null && editable.length() > 0) {
					if (start > 0) {
						editable.delete(start - 1, start);
					}
				}
			} else if (primaryCode == Keyboard.KEYCODE_SHIFT) {// 大小寫切換
				changeKey();
				keyboardView.setKeyboard(k2);

			} else if (primaryCode == Keyboard.KEYCODE_MODE_CHANGE) {// 數字鍵盤切換
				if (isnun) {
					isnun = false;
					keyboardView.setKeyboard(k1);
				} else {
					isnun = true;
					keyboardView.setKeyboard(k2);
				}
			} else if (primaryCode == 57419) { // 左移
				if (start > 0) {
					ed.setSelection(start - 1);
				}
			} else if (primaryCode == 57421) { // 右移
				if (start < ed.length()) {
					ed.setSelection(start + 1);
				}
			} else {
				editable.insert(start, Character.toString((char) primaryCode));
			}
		}
	};
	
	/**
	 * 除了 刪除，完成，大小寫切換，. 空格 ，等（可自己定義） 這些符號不用開啟預覽，其他需要預覽
	 */
	private void checkIShowPrewiew(int primaryCode) {
		List list = Arrays.asList(Keyboard.KEYCODE_CANCEL,
				Keyboard.KEYCODE_DELETE,
				Keyboard.KEYCODE_SHIFT,
				46, 32, 44, -2);
		if(list.contains(primaryCode)){
			keyboardView.setPreviewEnabled(false);
		}else{
			keyboardView.setPreviewEnabled(true);
		}
	}
	
	/**
	 * 鍵盤大小寫切換
	 */
	private void changeKey() {
		List keylist = k1.getKeys();
		if (isupper) {//大寫切換小寫
			isupper = false;
			for(Key key:keylist){
				if (key.label!=null && isword(key.label.toString())) {
					key.label = key.label.toString().toLowerCase();
					key.codes[0] = key.codes[0]+32;
				}
			}
		} else {//小寫切換大寫
			isupper = true;
			for(Key key:keylist){
				if (key.label!=null && isword(key.label.toString())) {
					key.label = key.label.toString().toUpperCase();
					key.codes[0] = key.codes[0]-32;
				}
			}
		}
	}

    public void showKeyboard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.GONE || visibility == View.INVISIBLE) {
            keyboardView.setVisibility(View.VISIBLE);
            isShow = true;
        }
    }
    
    public void hideKeyboard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.VISIBLE) {
            keyboardView.setVisibility(View.INVISIBLE);
            isShow = false;
        }
    }
    
    private boolean isword(String str){
    	String wordstr = "abcdefghijklmnopqrstuvwxyz";
    	if (wordstr.indexOf(str.toLowerCase())>-1) {
			return true;
		}
    	return false;
    }

}
public class MainActivity extends  Activity {

	private KeyboardUtil keyboardUtil;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.keyboard_layout);
		
		final EditText et = (EditText) findViewById(R.id.edit1);
		et.setOnTouchListener(new OnTouchListener() {
			
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				int inputType = et.getInputType();
				et.setInputType(InputType.TYPE_NULL);
				if(null == keyboardUtil)
					keyboardUtil = new KeyboardUtil(et);
				
				if(!keyboardUtil.isShow)
					keyboardUtil.showKeyboard();
				et.setInputType(inputType);
				return false;
			}
		});
	}
	
	@Override
	public void onBackPressed() {
		if(keyboardUtil.isShow)
			keyboardUtil.hideKeyboard();
		super.onBackPressed();
		
	}

}