5.17学习内容 android判断软键盘状态、系统键盘监控、生成中间logo的二维码

悠悠 2022-08-08 12:44 5阅读 0赞

android判断键盘状态两种方法：

1：http://www.it165.net/pro/html/201206/2987.html

protected void onLayout(boolean changed, int l, int t, int r, int b) {
    		super.onLayout(changed, l, t, r, b);
    		if(!mHasInit) {
    			mHasInit = true;
    			mHeight = b;
    			if(onKeyboardStateChangedListener != null) {
    				onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_INIT);
    			}
    		} else {
    			mHeight = mHeight < b ? b : mHeight;
    		}
    		
    		if(mHasInit && mHeight > b) {
    			mHasKeyboard = true;
    			if(onKeyboardStateChangedListener != null) {
    				onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_SHOW);
    			}
    		}
    		if(mHasInit && mHasKeyboard && mHeight == b) {
    			mHasKeyboard = false;
    			if(onKeyboardStateChangedListener != null) {
    				onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_HIDE);
    			}
    		}
    }

2.http://blog.csdn.net/h7870181/article/details/8332991

http://blog.csdn.net/yellowcath/article/details/8663527

InputMethodManager imm = (InputMethodManager) getSystemService(Activity.INPUT\_METHOD\_SERVICE);   
        if(imm.hideSoftInputFromWindow(editText.getWindowToken(), 0))  
        \{  
        imm.showSoftInput(editText,0);  
        //软键盘已弹出  
        \}  
        else  
        \{  
        //软键盘未弹出  
        \}

二，系统键盘事件捕获：

http://blog.csdn.net/yzzst/article/details/45747507

getevent –l

<table style="width:946px; border-collapse:collapse; border-spacing:0px; border:1px solid rgb(238,238,238); color:rgb(0,0,0); font-family:'microsoft yahei'; font-size:14px; line-height:26px"> 
 <thead style=""> 
  <tr style=""> 
   <th align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 操作</th> 
   <th align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 输出信号</th> 
  </tr> 
 </thead> 
 <tbody style=""> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 按下电源键</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event0: EV_KEY KEY_POWER DOWN&nbsp;<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 000000&nbsp;<br style=""> /dev/input/event0: EV_KEY KEY_POWER UP&nbsp;<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 000000</td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 音量键下</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event8: EV_KEY KEY_VOLUMEDOWN DOWN<br style=""> /dev/input/event8: EV_SYN SYN_REPORT 00000000<br style=""> /dev/input/event8: EV_KEY KEY_VOLUMEDOWN UP<br style=""> /dev/input/event8: EV_SYN SYN_REPORT 00000000</td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 音量键上</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event8: EV_KEY KEY_VOLUMEUP DOWN<br style=""> /dev/input/event8: EV_SYN SYN_REPORT 00000000<br style=""> /dev/input/event8: EV_KEY KEY_VOLUMEUP UP<br style=""> /dev/input/event8: EV_SYN SYN_REPORT 00000000</td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 按下物理按键“1”</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event0: EV_KEY KEY_1 DOWN<br style=""> /dev/input/event0: EV_KEY KEY_1 UP<br style=""> </td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 按下物理按键“q”</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event0: EV_KEY KEY_Q DOWN<br style=""> /dev/input/event0: EV_KEY KEY_Q UP</td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 按下软键盘上的“q”字母</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event0: EV_ABS ABS_X 0000001b<br style=""> /dev/input/event0: EV_ABS ABS_Y 000001d5<br style=""> /dev/input/event0: EV_KEY BTN_TOUCH DOWN<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 00000000<br style=""> /dev/input/event0: EV_KEY BTN_TOUCH UP<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 00000000</td> 
  </tr> 
  <tr style=""> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> 按下软件键盘上的的“1”按键</td> 
   <td align="left" style="padding:8px; line-height:20px; vertical-align:top; border:1px solid rgb(238,238,238)"> /dev/input/event0: EV_ABS ABS_X 00000019<br style=""> /dev/input/event0: EV_ABS ABS_Y 000001d7<br style=""> /dev/input/event0: EV_KEY BTN_TOUCH DOWN<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 00000000<br style=""> /dev/input/event0: EV_KEY BTN_TOUCH UP<br style=""> /dev/input/event0: EV_SYN SYN_REPORT 00000000</td> 
  </tr> 
 </tbody> 
</table>

三：生成中间logo的二维码：

http://blog.csdn.net/jerehedu/article/details/45746369

/** 
         * 生成二维码 
         * @param string 二维码中包含的文本信息 
         * @param mBitmap logo图片 
         * @param format  编码格式 
         * @return Bitmap 位图 
         * @throws WriterException 
         */  
        public Bitmap createCode(String string,Bitmap mBitmap, BarcodeFormat format)  
                throws WriterException {  
            Matrix m = new Matrix();  
            float sx = (float) 2 * IMAGE_HALFWIDTH / mBitmap.getWidth();  
            float sy = (float) 2 * IMAGE_HALFWIDTH  
                    / mBitmap.getHeight();  
            m.setScale(sx, sy);//设置缩放信息  
            //将logo图片按martix设置的信息缩放  
            mBitmap = Bitmap.createBitmap(mBitmap, 0, 0,  
                    mBitmap.getWidth(), mBitmap.getHeight(), m, false);  
            MultiFormatWriter writer = new MultiFormatWriter();  
            Hashtable<EncodeHintType, String> hst = new Hashtable<EncodeHintType, String>();  
            hst.put(EncodeHintType.CHARACTER_SET, "UTF-8");//设置字符编码  
            BitMatrix matrix = writer.encode(string, format, 400, 400, hst);//生成二维码矩阵信息  
            int width = matrix.getWidth();//矩阵高度  
            int height = matrix.getHeight();//矩阵宽度  
            int halfW = width / 2;  
            int halfH = height / 2;  
            int[] pixels = new int[width * height];//定义数组长度为矩阵高度*矩阵宽度，用于记录矩阵中像素信息  
            for (int y = 0; y < height; y++) {//从行开始迭代矩阵  
                for (int x = 0; x < width; x++) {//迭代列  
                    if (x > halfW - IMAGE_HALFWIDTH && x < halfW + IMAGE_HALFWIDTH  
                            && y > halfH - IMAGE_HALFWIDTH  
                            && y < halfH + IMAGE_HALFWIDTH) {//该位置用于存放图片信息  
    //记录图片每个像素信息  
                        pixels[y * width + x] = mBitmap.getPixel(x - halfW  
                                + IMAGE_HALFWIDTH, y - halfH + IMAGE_HALFWIDTH);                } else {  
                        if (matrix.get(x, y)) {//如果有黑块点，记录信息  
                            pixels[y * width + x] = 0xff000000;//记录黑块信息  
                        }  
                    }  
      
                }  
            }  
            Bitmap bitmap = Bitmap.createBitmap(width, height,  
                    Bitmap.Config.ARGB_8888);  
            // 通过像素数组生成bitmap  
            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);  
            return bitmap;  
        }