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  • 常见问题参考合辑

    java 读文件 http://www.cnblogs.com/lovebread/archive/2009/11/23/1609122.html

    java 写文件 http://www.jb51.net/article/47062.htm

    while(true) {
                        // Read from the InputStream
                        try {
                            if( (bytes = mmInStream.read(buffer)) > 0 )  {
                                resultbuffer.append(new String(buffer,0,bytes));
                            }
                            
                            if(resultbuffer.length() == 32) {
                                String s = resultbuffer.toString();
                                LogUtil.i(TAG,s);
                                Message msg = new Message();
                                msg.obj = s;
                                msg.what = 2;
                                LinkDetectedHandler.sendMessage(msg);
                                break;
                           }
        
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            //如果在已连接的情况下,血压计突然关闭,会导致读不到数据
                             e.printStackTrace();
                             Message msg = new Message();
                             msg.obj = "连接异常!正在重连...";
                             msg.what = 1;
                             LinkDetectedHandler.sendMessage(msg);
                             break;
                        }
    View Code

    多线程 http://blog.csdn.net/michellehsiao/article/details/7639788

    字符串拼接:http://developer.51cto.com/art/201306/400370.htm

    Linux学习之CentOS(十四)--初识ssh

    什么是Workerman http://www.workerman.net/ Workerman是一款纯PHP开发的开源的高性能的PHP socket 服务器框架。已经被多家公司用于移动通讯、手游服务端、网络游戏服务器、聊天室服务器、硬件通讯服务器、智能家居等服务端的开发。 只要会PHP,你就可以基于Workerman轻而易举的开发出你想要的网络应用,不必再为PHP Socket底层开发而烦恼。

    不能忽视的hierarchy viewer

    http://www.shangxueba.com/jingyan/113092.html

    Inflate的奇怪问题,在做桌面时,allapp一直显示不了,问题出在this参数上

     LayoutInflater.from(context).inflate(R.layout.apps_customize_pane, this);

    http://www.cnblogs.com/HighFun/p/3281674.html

    权限出错解决方案:

    <uses-permission android:name="android.permission.BIND_APPWIDGET" />
    
    int appWidgetId = mAppWidgetHost.allocateAppWidgetId() ;        
                                    Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_BIND);
                            intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
                            intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, mAppWidgetProviderInfo.provider);
                            startActivityForResult(intent, REQUEST_BIND_APPWIDGET);        

    callback应用失败: http://www.jb51.net/article/61002.htm  callback更新UI时要跑在主线程里面

    Android Context 上下文 你必须知道的一切

    输入流转化成字符串:

               resultbuffer = new StringBuffer();
                    byte[] buffer = new byte[1024];
                    int bytes;
                    InputStream mmInStream = null;
                    
                    try {
                        if( (bytes = mmInStream.read(buffer)) > 0 )  {
                            resultbuffer.append(new String(buffer,0,bytes));
                        }
                    } catch (IOException e2) {
                        // TODO Auto-generated catch block
                        e2.printStackTrace();
                    }

     if视情况改成while

    点击二态的标准写法:

    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android" >
        <item android:state_focused="true" android:drawable="@drawable/adduser_btn_pressed1"/>
        <item android:state_pressed="true" android:drawable="@drawable/adduser_btn_pressed1"/>
        <item android:drawable="@drawable/adduser_btn_nor1"/>
    
    </selector>

    另外一种写法:

    selector_common_btn.xml
    <?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android" >
        <item android:state_focused="true">
            <shape >
                <corners android:radius="8dp"/>
                <solid android:color="#ff33b5e5"/>
            </shape>
        </item>
        <item android:state_pressed="true">
            
            <shape >
                <corners android:radius="8dp"/>
                <solid android:color="#ff33b5e5"/>
            </shape>
        </item>
        <item >
            <shape >
                <corners android:radius="8dp"/>
                <solid android:color="#FF4ebcd3"/>
            </shape>
        </item>
    </selector>

    引用:

    <Button
                 android:id="@+id/loadBtn"
                 android:textColor="#FFFFFFFF"
                 android:textSize="20sp"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_margin="10dp"
                 android:padding="5dp"
                 android:background="@drawable/selector_common_btn"
                 android:text="登录" />

    效果:

    圆形控件:

    package com.toyoung.ge.customwidge;
    
    import android.content.Context;
    import android.graphics.Bitmap;
    import android.graphics.Canvas;
    import android.graphics.Paint;
    import android.graphics.drawable.BitmapDrawable;
    import android.graphics.drawable.Drawable;
    import android.util.AttributeSet;
    import android.widget.ImageView;
    
    /**
     * Created by yeran on 2015/5/18.
     *
     * 圆形ImageView控件
     */
    public class CustomRoundView extends ImageView {
        Paint paint;
    
        public CustomRoundView(Context context) {
            super(context);
        }
    
        public CustomRoundView(Context paramContext, AttributeSet paramAttributeSet) {
            super(paramContext, paramAttributeSet);
        }
    
        public CustomRoundView(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {
            super(paramContext, paramAttributeSet, paramInt);
        }
    
        protected void onDraw(Canvas canvas){
           Drawable drawable = getDrawable();
            if(drawable==null)
                return;
            if(getWidth()==0||getHeight()==0)
                return;
            Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();
            Bitmap bitmap1 = bitmap.copy(Bitmap.Config.ARGB_8888, true);
            int w = getWidth(),h=getHeight();
            RoundConnerBitmap rb = new RoundConnerBitmap();
            canvas.drawBitmap(rb.toRoundBitmap(bitmap1,w), 0, 0, null);
        }
    
    
    }
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  • 原文地址:https://www.cnblogs.com/hixin/p/4388399.html
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