自定义键盘（一）

android的键盘各式各样，但未必能够满足我们充满创意的产品。为了让我们很好的配合产品，做个不与产品撕13的技术，在合理打造一款自定义的键盘。

先上代码吧，工具类代码如下

package com.binaryknight.customkeyboard;

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;

/**
 * Created by ${BinaryKnight} on 2017/8/31.
 */
public class KeyboardUtil {
    private Context ctx;
    private Activity act;
    private KeyboardView keyboardView;
    private Keyboard keyboard;// 字母键盘
    private boolean isShowing = false;//键盘是否显示


    private EditText ed;


    public KeyboardUtil(Activity act, Context ctx, EditText edit) {
        this.act = act;
        this.ctx = ctx;
        this.ed = edit;
        keyboard = new Keyboard(ctx, R.xml.keyboard);
        keyboardView = (KeyboardView) act.findViewById(R.id.keyboard_view);
        keyboardView.setKeyboard(keyboard);
        keyboardView.setEnabled(true);
        keyboardView.setPreviewEnabled(true);
        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_DONE) {// 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 == 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));
            }
        }
    };


    public void showKeyboard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.GONE || visibility == View.INVISIBLE) {
            keyboardView.setVisibility(View.VISIBLE);
            isShowing = true;
        }
    }

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

    public boolean isShowing() {
        if (keyboardView.getVisibility() == View.VISIBLE) {
            return true;
        } else if (keyboardView.getVisibility() == View.GONE || keyboardView.getVisibility() == View.INVISIBLE) {
            return false;
        }
        return false;
    }
}

以上 代码不难理解，就是创建一个构造函数，传入上下文，还有该activity实体，以及KeyboardView类的监听，当然还得准备配置我们的xml键盘实体展示。接下来是如何调用了，现在在activity如何调用它呢，方法也很简单：

   第一步：我们的布局

第二步：

package com.binaryknight.customkeyboard;

import android.os.Build;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.EditText;

import java.lang.reflect.Method;

public class MainActivity extends AppCompatActivity {
    private EditText editText;
    private KeyboardUtil keyboardUtil;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        initView();
        editListener();
    }

    private void initView() {
        editText = (EditText) findViewById(R.id.editText);
        setupUI(findViewById(R.id.frame_layout));//判断点击外部键盘消失
    }

    private void editListener() {
        //Android.EditText点击时,隐藏系统弹出的键盘,显示出光标  (系统版本>5.0)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            editText.setShowSoftInputOnFocus(false);
        } else {
            try {
                final Method method = EditText.class.getMethod(
                        "setShowSoftInputOnFocus"
                        , new Class[]{boolean.class});
                method.setAccessible(true);
                method.invoke(editText, false);
            } catch (Exception e) {
                // ignore
            }
        }
        editText.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int inputback = editText.getInputType();
                Log.d("inputback", "inputback" + inputback);
                // editVin.setInputType(InputType.TYPE_NULL);
                keyboardUtil = new KeyboardUtil(MainActivity.this, getApplicationContext(), editText);
                keyboardUtil.showKeyboard();
                // inputFilterSpace(editText);
                editText.setInputType(inputback);
                return false;
            }
        });
    }

    //手机键盘显示
    public void setupUI(View view) {
        //Set up touch listener for non-text box views to hide keyboard.
        if (!(view instanceof EditText)) {
            view.setOnTouchListener(new View.OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event) {
                    if (isKeyboardShowing()) {
                        closeKeyboard();
                    }
                    return false;
                }
            });
        }
        //If a layout container, iterate over children and seed recursion.
        if (view instanceof ViewGroup) {
            for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
                View innerView = ((ViewGroup) view).getChildAt(i);
                setupUI(innerView);
            }
        }
    }

    public boolean isKeyboardShowing() {
        if (keyboardUtil != null) {
            return keyboardUtil.isShowing();
        }
        return false;
    }
//键盘的收起
    public void closeKeyboard() {
        if (keyboardUtil != null) {
            keyboardUtil.hideKeyboard();
        }
    }
}

相信聪明的你，一定很简单的就能看懂怎么操作了，我们已经完成了一次伟大的键盘定义了，让我们看看效果图吧：

不知道是不是你喜欢符合你的自定义键盘呢，下一节我们将写一个用dialog伪装的自定义键盘吧

源码下载