android虚拟键盘实现

生成虚拟键盘的DIALOG方法：

package org.socketclient.keyboard;

import org.socketclient.R;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Message;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class KeyBoardDialog{

   public Context context;

   public VirtualKeyboard keybord;

   public MessageHandler messageHandler;

   public KeyBoardDialog(Context context,MessageHandler handler){
       this.context = context;
       this.messageHandler = handler;
   }

   public AlertDialog CreateDialog(){
       AlertDialog localAlertDialog = new AlertDialog.Builder(context).create();
       localAlertDialog.show();
       localAlertDialog.setContentView(R.layout.virtual_keyboard_layout);
       localAlertDialog.setCanceledOnTouchOutside(false);
       keybord = (VirtualKeyboard) localAlertDialog.findViewById(R.id.virtualKeyboard1);
       keybord.setOnTouchListener(listener);
       return localAlertDialog;
   }
   //当前坐标点位置
   int cx = 0,cy = 0;
   final OnTouchListener listener = new OnTouchListener() {
       @Override
       public boolean onTouch(View view, MotionEvent event) {
           // TODO Auto-generated method stub
           cx = (int) event.getX();
           cy = (int) event.getY();
           switch (event.getAction()) {
           case MotionEvent.ACTION_DOWN:
               keybord.postInvalidate(cx, cy, 0, 0);
               if(keybord.currentModel != null){
                   Message message = new Message();
                   message.what = 1001;
                   message.obj = keybord.currentModel.code;
                   messageHandler.handler.sendMessage(message);
               }
               break;
           case MotionEvent.ACTION_MOVE:
               break;
           case MotionEvent.ACTION_UP:
               break;
           }
           return false;
       }
   };
}

消息相应类：

package org.socketclient.keyboard;

import android.annotation.SuppressLint;
import android.os.Handler;
import android.os.Message;

public abstract class MessageHandler {

   public Handler handler;

   public MessageHandler(){
       createHandler();
   }

   @SuppressLint("HandlerLeak")
   public void createHandler(){
       handler = new Handler(){
           @Override
           public void handleMessage(Message msg) {
               // TODO Auto-generated method stub
               if(msg.what == 1001){
                   onTouchMessage(String.valueOf((Integer)msg.obj));
               }
               super.handleMessage(msg);
           }
       };
   }

   public abstract void onTouchMessage(String message);
}

自定义虚拟键盘控件

package org.socketclient.keyboard;

import java.util.ArrayList;
import org.socketclient.R;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

@SuppressLint("DrawAllocation")
public class VirtualKeyboard extends View {

   public int width;

   public int height;

   public int keyWidth;

   public int keyHeight;

   public final int rows = 6;

   public final int cols = 10;

   public final Rect brect = new Rect(0,0,100,100);

   public Paint paint;

   public boolean isfirst = true;
   //代表当前的按钮所代表的按键
   public int[][] keyText = {
           {0x11,0x12,0x20,0x0D,0x28,0x26,0x25,0x27},
           {0x10,0x4C,0x5A,0x58,0x43,0x56,0x42,0x4E,0x4D,0x08},
           {0x1B,0x41,0x53,0x44,0x46,0x47,0x48,0x4A,0x4B,0x2E},
           {0x51,0x57,0x45,0x52,0x54,0x59,0x55,0x49,0x4F,0x50},
           {0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x30}};
   //当前按钮所代表的图标
   public int[][] keyBitmapId = {
           {R.drawable.ctrl,R.drawable.alt,R.drawable.space,R.drawable.enter,R.drawable.down,R.drawable.up,R.drawable.left,R.drawable.right},
           {R.drawable.shift,R.drawable.l,R.drawable.z,R.drawable.x,R.drawable.c,R.drawable.v,R.drawable.b,R.drawable.n,R.drawable.m,R.drawable.bspace},
           {R.drawable.esc,R.drawable.a,R.drawable.s,R.drawable.d,R.drawable.f,R.drawable.g,R.drawable.h,R.drawable.j,R.drawable.k,R.drawable.delete},
           {R.drawable.q,R.drawable.w,R.drawable.e,R.drawable.r,R.drawable.t,R.drawable.y,R.drawable.u,R.drawable.i,R.drawable.o,R.drawable.p},
           {R.drawable.n1,R.drawable.n2,R.drawable.n3,R.drawable.n4,R.drawable.n5,R.drawable.n6,R.drawable.n7,R.drawable.n8,R.drawable.n9,R.drawable.n0}};
   //被按下按钮所代表图标
   public int[][] keyBitmapId2 = {
           {R.drawable.ctrl1,R.drawable.alt1,R.drawable.space1,R.drawable.enter1,R.drawable.down1,R.drawable.up1,R.drawable.left1,R.drawable.right1},
           {R.drawable.shift1,R.drawable.l1,R.drawable.z1,R.drawable.x1,R.drawable.c1,R.drawable.v1,R.drawable.b1,R.drawable.nn1,R.drawable.m1,R.drawable.bspace1},
           {R.drawable.esc1,R.drawable.a1,R.drawable.s1,R.drawable.d1,R.drawable.f1,R.drawable.g1,R.drawable.h1,R.drawable.j1,R.drawable.k1,R.drawable.delete1},
           {R.drawable.q1,R.drawable.w1,R.drawable.e1,R.drawable.r1,R.drawable.t1,R.drawable.y1,R.drawable.u1,R.drawable.i1,R.drawable.o1,R.drawable.p1},
           {R.drawable.n11,R.drawable.n22,R.drawable.n33,R.drawable.n44,R.drawable.n55,R.drawable.n66,R.drawable.n77,R.drawable.n88,R.drawable.n99,R.drawable.n00}};

   //按钮集合
   public ArrayList keylist = null;
   //当前被按下按钮
   public KeyModel currentModel = null;

   public VirtualKeyboard(Context context) {
       super(context);
       // TODO Auto-generated constructor stub
       init();
   }

   public VirtualKeyboard(Context context, AttributeSet attrs) {
       super(context, attrs);
       // TODO Auto-generated constructor stub
       init();
   }

   public VirtualKeyboard(Context context, AttributeSet attrs, int defStyle) {
       super(context, attrs, defStyle);
       // TODO Auto-generated constructor stub
       init();
   }
   //初始化按钮
   public void init(){
       paint = new Paint(Paint.ANTI_ALIAS_FLAG);
       paint = new Paint(Paint.ANTI_ALIAS_FLAG);
       paint.setStyle(Paint.Style.FILL);
       paint.setColor(Color.WHITE); // 红色圆形

       if(keylist != null)
           keylist.clear();
       keylist = new ArrayList();
       //获取布局大小
       int width = getWidth();
       int height = getHeight();
       //计算单个按钮大小
       keyWidth = width / rows;
       keyHeight = height / cols;
       for(int i=0; i            for(int j=0; j                KeyModel model;
               if(i == 0){
                   if(j < 2){
                       model = new KeyModel(i * keyWidth,
                               j * keyHeight,(i + 1) * keyWidth,(j+1) * keyHeight);
                   }else if(j == 2){
                       model = new KeyModel(i * keyWidth,
                               j * keyHeight,(i + 1) * keyWidth,(j + 2) * keyHeight);
                   }else if(j == 3){
                       model = new KeyModel(i * keyWidth,
                               (j + 1) * keyHeight,(i + 1) * keyWidth,(j + 3) * keyHeight);
                   }else{
                       model = new KeyModel(i * keyWidth,
                               (j + 2) * keyHeight,(i + 1) * keyWidth,(j + 3) * keyHeight);
                   }
               }else{
                   model = new KeyModel(i * keyWidth,
                           j * keyHeight,(i + 1) * keyWidth,(j+1) * keyHeight);
               }
               //显示编号
               model.index = i;
               model.jndex = j;
               model.bitmap = BitmapFactory.decodeResource(getResources(), keyBitmapId[i][j]);
               model.code = keyText[i][j];
               keylist.add(model);
           }
       }
   }
   //绘制键盘
   @SuppressLint("DrawAllocation")
   @Override
   protected void onDraw(Canvas canvas) {
       // TODO Auto-generated method stub
       super.onDraw(canvas);
       //绘制
       if(isfirst == true){
           init();
       }
       isfirst = false;
       // 设置背景色
       paint.setColor(Color.BLACK);
       for(int i=0; i            KeyModel model = keylist.get(i);
           RectF rectf = model.textf;
           Matrix matrix = new Matrix();
           // 缩放原图
           matrix.postScale(1f, 1f);
           // 向左旋转45度，参数为正则向右旋转
           matrix.postRotate(90);
           //bmp.getWidth(), 500分别表示重绘后的位图宽高
           Bitmap dstbmp = Bitmap.createBitmap(model.bitmap, 0, 0, 100, 100,
                   matrix, true);
           canvas.drawBitmap(dstbmp, brect, rectf, paint);
       }

       if(currentModel != null){
           Matrix matrix = new Matrix();
           // 缩放原图
           matrix.postScale(1f, 1f);
           // 向左旋转45度，参数为正则向右旋转
           matrix.postRotate(90);
           //bmp.getWidth(), 500分别表示重绘后的位图宽高
           Bitmap bitmap = BitmapFactory.decodeResource(getResources(), keyBitmapId2[currentModel.index][currentModel.jndex]);
           Bitmap dstbmp = Bitmap.createBitmap(bitmap, 0, 0, 100, 100,
                   matrix, true);
           canvas.drawBitmap(dstbmp, brect, currentModel.textf, paint);
       }
       System.out.println("绘制图像了吗？");
   }
   //重新绘制键盘
   @Override
   public void postInvalidate(int left, int top, int right, int bottom) {
       // TODO Auto-generated method stub
       currentModel = null;
       GetClickKey(left,top);
       if(currentModel != null){
           super.postInvalidate((int)currentModel.textf.left,(int)currentModel.textf.top,
                   (int)currentModel.textf.right,(int)currentModel.textf.bottom);
       }
       else{
           super.postInvalidate(0,0,0,0);
       }
   }
   //计算当前本按下键盘位置
   public void GetClickKey(int left, int top){
       int index = left / keyWidth;
       int jndex = top / keyHeight;
       //第一行特殊处理数据
       if(index == 0){
           if(jndex == 3)
               jndex = 2;
           if(jndex == 4 || jndex == 5)
               jndex = 3;
           if(jndex > 5)
               jndex = jndex - 2;
       }
       for(int i=0; i            KeyModel model = keylist.get(i);
           if(model.index == index && model.jndex == jndex){
               currentModel = model;
           }
       }
   }
   //按键类
   class KeyModel{
       public KeyModel(int x,int y,int x1,int y1){
           textf = new RectF(x,y,x1,y1);
       }
       //左下角位置
       public RectF textf;
       //显示图片
       public Bitmap bitmap;
       //代表的字符串
       public int code;
       //显示编号
       public int index;
       public int jndex;
   }

}

调用方法：

KeyBoardDialog dialog = new KeyBoardDialog(BaseActivity1.this , new MessageHandler() {
           @Override
           public void onTouchMessage(String message) {
               // TODO Auto-generated method stub
               sendMessage("b,"+message,"Contrl",-1);
           }
       });
       dialog.CreateDialog();

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