手动写一个简易全键盘

最近需要做一个全键盘的需求，所以记录和分享一下思路。
上来不多说直接上代码：

1.这是一个工具类，可以直接放到代码里使用：

package com.example.administrator.keyboard;

import android.app.Activity;
import android.content.Context;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.text.Editable;
import android.view.View;
import android.widget.EditText;

import java.util.List;

/**
 * Created by Lee on 2017/4/9.
 */
public class KeyBoardUtil {
    private Context ctx;
    private Activity act;
    private KeyboardView keyboardView;
    private Keyboard k1;// 字母键盘
    private Keyboard k2;// 数字键盘
    public boolean isnun = false;// 是否数据键盘
    public boolean isupper = false;// 是否大写

    private EditText ed;

    public KeyBoardUtil(Activity act, Context ctx, EditText edit) {
        this.act = act;
        this.ctx = ctx;
        this.ed = edit;
        k1 = new Keyboard(ctx, R.xml.qwerty);
        k2 = new Keyboard(ctx, R.xml.symbols);
        keyboardView = (KeyboardView) act.findViewById(R.id.keyboard_view);
        keyboardView.setKeyboard(k1);
        keyboardView.setEnabled(true);
        keyboardView.setPreviewEnabled(false);
        keyboardView.setOnKeyboardActionListener(listener);
    }

    private KeyboardView.OnKeyboardActionListener listener = new KeyboardView.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) {
        }

        @Override
        public void onKey(int primaryCode, int[] keyCodes) {
            Editable editable = ed.getText();
            int start = ed.getSelectionStart();
            if (primaryCode == Keyboard.KEYCODE_CANCEL) {// 完成
                hideKeyboard();
            } else if (primaryCode == Keyboard.KEYCODE_DELETE) {// 回退
                if (editable != null && editable.length() > 0) {
                    if (start > 0) {
                        editable.delete(start - 1, start);
                    }
                }
            } else if (primaryCode == Keyboard.KEYCODE_SHIFT) {// 大小写切换
                changeKey();
                keyboardView.setKeyboard(k1);

            } else if (primaryCode == Keyboard.KEYCODE_MODE_CHANGE) {// 数字键盘切换
                if (isnun) {
                    isnun = false;
                    keyboardView.setKeyboard(k1);
                } else {
                    isnun = true;
                    keyboardView.setKeyboard(k2);
                }
            } else if (primaryCode == 57419) { // go left
                if (start > 0) {
                    ed.setSelection(start - 1);
                }
            } else if (primaryCode == 57421) { // go right
                if (start < ed.length()) {
                    ed.setSelection(start + 1);
                }
            } else {
                editable.insert(start, Character.toString((char) primaryCode));
            }
        }
    };

    /**
     * 键盘大小写切换
     */
    private void changeKey() {
        List keylist = k1.getKeys();
        if (isupper) {//大写切换小写
            isupper = false;
            for(Keyboard.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 {//小写切换大写
            isupper = true;
            for(Keyboard.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);
        }
    }

    public void hideKeyboard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.VISIBLE) {
            keyboardView.setVisibility(View.INVISIBLE);
        }
    }

    private boolean isword(String str){
        String wordstr = "abcdefghijklmnopqrstuvwxyz";
        if (wordstr.indexOf(str.toLowerCase())>-1) {
            return true;
        }
        return false;
    }

}

2.具体实现方式：

package com.example.administrator.keyboard;

import android.app.Activity;
import android.support.v4.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.text.InputType;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;

/**
 * Created by Administrator on 2017/4/9.
 */
public class NewFragment extends Fragment{
    private EditText editText1;
    private EditText edit1;
    private Context ctx;
    private Activity act;
    private Button button;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ctx=getContext();
        act=getActivity();
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.fragment,container,false);
        editText1= (EditText) view.findViewById(R.id.edit);
        edit1= (EditText) view.findViewById(R.id.edit1);
        button= (Button) view.findViewById(R.id.btn);
        editText1.setInputType(InputType.TYPE_NULL);
        editText1.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                new KeyBoardUtil(act, ctx, editText1).showKeyboard();
                return false;
            }
        });

        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        edit1.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int inputback = edit1.getInputType();
                edit1.setInputType(InputType.TYPE_NULL);
                new KeyBoardUtil(act, ctx, edit1).showKeyboard();
                edit1.setInputType(inputback);

                return false;
            }
        });
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String s=edit1.getText().toString();
                Log.i("look",s);
            }
        });

    }
}

3.接下来就是布局文件了：
xml文件1：

---

xml文件2

好了，到此结束。

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