安卓实战：自定义软键盘

（注：安卓实战项目记账本的一部分内容）

在记账本中需要输入数字，萌生了想自己制作一个数字软键盘的内容,失败过程不眷数，直接展示最终成果
首先是页面布局：

key.xml

 
 			//键盘与键盘间垂直方向分割		//数字键1		//数字键2		//数字键3	//删除键		//数字键4		//数字键5		//数字键6 	//确定键，设置较大		//数字键7		//数字键8		//数字键9	//清零键		//0键		//.键
 

然后是逻辑编写：

KeyboardUtils.java

package com.example.mytally.utils;import android.inputmethodservice.Keyboard;
 import android.inputmethodservice.KeyboardView;
 import android.text.Editable;
 import android.text.InputType;
 import android.view.View;
 import android.widget.EditText;
 import com.example.mytally.R;public class KeyBoardUtils {private final Keyboard k1;    //自定义键盘private KeyboardView keyboardView;private EditText editText;	//设置一个变量EditText使得输入处随软键盘输入变化  //生成两者的构造方法public interface OnEnsureListener{public void onEnsure();}OnEnsureListener onEnsureListener;public void setOnEnsureListener(OnEnsureListener onEnsureListener) {this.onEnsureListener = onEnsureListener;}public KeyBoardUtils(KeyboardView keyboardView, EditText editText) {this.keyboardView = keyboardView;this.editText = editText;this.editText.setInputType(InputType.TYPE_NULL);  	//取消弹出系统键盘k1 = new Keyboard(this.editText.getContext(), R.xml.key);	//获取自定义键盘的对象this.keyboardView.setKeyboard(k1);  	//设置要显示键盘的样式this.keyboardView.setEnabled(true);this.keyboardView.setPreviewEnabled(false);		//能进行预览       this.keyboardView.setOnKeyboardActionListener(listener);  //设置键盘按钮被点击了的监听}KeyboardView.OnKeyboardActionListener listener = new KeyboardView.OnKeyboardActionListener() {@Overridepublic void onPress(int primaryCode) {}@Overridepublic void onRelease(int primaryCode) {}@Overridepublic void onKey(int primaryCode, int[] keyCodes) {Editable editable = editText.getText();int start = editText.getSelectionStart();switch (primaryCode) {case Keyboard.KEYCODE_DELETE:   //点击了删除键if (editable!=null &&editable.length()>0) {if (start>0) {editable.delete(start-1,start);}}break;case Keyboard.KEYCODE_CANCEL:   //点击了清零editable.clear();break;case Keyboard.KEYCODE_DONE:    //点击了完成onEnsureListener.onEnsure();   //通过接口回调的方法，当点击确定时，可以调用这个方法break;default:  //其他数字直接插入editable.insert(start,Character.toString((char)primaryCode));break;}}@Overridepublic void onText(CharSequence text) {}@Overridepublic void swipeLeft() {}@Overridepublic void swipeRight() {}@Overridepublic void swipeDown() {}@Overridepublic void swipeUp() {}};//    显示键盘public void showKeyboard(){int visibility = keyboardView.getVisibility();if (visibility == View.INVISIBLE ||visibility==View.GONE) {keyboardView.setVisibility(View.VISIBLE);}}//    隐藏键盘public void hideKeyboard(){int visibility = keyboardView.getVisibility();if (visibility== View.VISIBLE||visibility==View.INVISIBLE) {keyboardView.setVisibility(View.GONE);}}
 }
 

成果图：

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原文链接

作者：黄书竞