9.18工作日誌,系統定位，自定義viewgroup，放射獲取注入的類

傷城~ 2022-08-05 11:19 11阅读 0赞

自寫工具類，更新activeandroid框架的數據庫

@Table(name = "CategoryData",id = "id")
    public class CategoryData extends Model implements Serializable { 
        @Column(name = "cid",index = true)
        public int cid;
    
        @Column(name = "namebn",index = true)
        public String namebn;
    
        @Column(name = "nameen",index = true)
        public String nameen;
    
        @Column(name = "namegn",index = true)
        public String namegn;
    
        public CategoryData()
        {
            super();
        }
    }

使用到放射判斷這個類是不是使用了Table注入

Annotation[] annotations = cls.getDeclaredAnnotations();
                if (annotations != null) {
                    for (Annotation annotation : annotations) {
                        String annName = annotation.toString();
                        if (annName.indexOf("com.activeandroid.annotation.Table") != 0) {
                            isActivDB = true;
                            break;
                        }
                    }
                }

1.為什麼要用:annotation.toString();  
因為如果使用annotation.getClass().getName()，getCanonicalName都是返回@XX(一個無效的名字)，所以使用toString

參考  
[http://www.java2s.com/Tutorials/Java/java.lang.reflect/Field/0160\_\_Field.getDeclaredAnnotations\_.htm][http_www.java2s.com_Tutorials_Java_java.lang.reflect_Field_0160_Field.getDeclaredAnnotations_.htm]

Annotation[] annotations = field.getDeclaredAnnotations();
    annotations.toString()
    得到這樣的結果
    @com.activeandroid.annotation.Column(index=false, indexGroups=[], length=-1, name=orderbn, notNull=false, onDelete=NO_ACTION, onNullConflict=FAIL, onUniqueConflict=FAIL, onUniqueConflicts=[], onUpdate=NO_ACTION, unique=false, uniqueGroups=[])

對此寫了個有趣的正則取值代碼:

/** * 获取放射的属性的值 * @param annotation * @param annName * @return */
        private String getVlaueByColumnAnnotation(Annotation annotation,String annName) {
            String ret = "";
            String pattern = annName + "=(.*?),";
            Pattern r = Pattern.compile(pattern);
            Matcher m = r.matcher(annotation.toString());
            if (m.find()){
                ret = m.group();
                ret = ret.substring(annName.length()+1, ret.length()-1);
            }
            return ret;
        }

Log.d(TAG,getVlaueByColumnAnnotation(annotation,”name”));  
name>>>cid

將代碼放上jcenter:  
[http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0623/3097.html][http_www.jcodecraeer.com_a_anzhuokaifa_androidkaifa_2015_0623_3097.html]

寫了一個ViewGroup控件:

/** * 自動平鋪沒邊界viewgroup * Created by george.yang on 2015/9/15. */
    public class NoScllViewGroup extends ViewGroup { 
        private static final int PADDING_HOR = 10;//水平方向padding
        private static final int PADDING_VERTICAL = 5;//垂直方向padding
        private static final int SIDE_MARGIN = 5;//左右间距
        private static final int TEXT_MARGIN = 5;//??
    
        public NoScllViewGroup(Context context) {
            super(context);
    
        }
    
        public NoScllViewGroup(Context context, AttributeSet attrs) {
            super(context, attrs);
            init(context);
        }
    
        public NoScllViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            init(context);
        }
    
        private void init (Context context) {
    
        }
    
        public void setTexts (List<String> strings) {
            this.removeAllViews();
            for (String str:strings) {
                TextView tv  = new TextView(getContext());
                tv.setText(str);
                this.addView(tv);
            }
            this.requestLayout();
        }
    
        public void setImages (Activity activity,List<String> urls) {
            this.removeAllViews();
            LayoutInflater mlayoutInflater = (LayoutInflater) getContext()
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            for (int i=0;i<urls.size();i++) {
                final  int index = i;
                View view  = mlayoutInflater.inflate(R.layout.thumbitems,null);
                SimpleDraweeView simpleDraweeView = (SimpleDraweeView) view.findViewById(R.id.thumbimage);
                simpleDraweeView.setImageURI(Uri.parse(urls.get(i)));
                LayoutParams lp = simpleDraweeView.getLayoutParams();
                int width = DensityUtil.getWidthWithScreenByPersent(activity,1f/4) - 5 * PADDING_HOR;
                lp.width = width;
                lp.height = width;
    
                simpleDraweeView.setLayoutParams(lp);
                this.addView(view);
    
                view.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (listener!=null) {
                            listener.onItemClick(null,v,index,0);
                        }
                    }
                });
            }
            this.requestLayout();
        }
    
        private AdapterView.OnItemClickListener listener;
        public void setOnItemClickListener (AdapterView.OnItemClickListener listener) {
            this.listener = listener;
        }
    
        public void setAdapter (Adapter adapter) {
            this.removeAllViews();
            int count = adapter.getCount();
            for (int i=0;i<count;i++) {
                final  int index = i;
                View view = adapter.getView(i, null, null);
                this.addView(view);
    
                view.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (listener != null) {
                            listener.onItemClick(null, v, index, 0);
                        }
                    }
                });
            }
            this.requestLayout();
        }
    
    // @Override
    // protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    // measureChildren(widthMeasureSpec, heightMeasureSpec);
    // super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    // }
    //
    // protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 
    // int mViewGroupWidth = getMeasuredWidth(); //当前ViewGroup的总宽度
    // int mPainterPosX = left; //当前绘图光标横坐标位置
    // int mPainterPosY = top; //当前绘图光标纵坐标位置
    //
    // int childCount = getChildCount();
    // for ( int i = 0; i < childCount; i++ ) { 
    //
    // View childView = getChildAt(i);
    //
    // int width = childView.getMeasuredWidth();
    // int height = childView.getMeasuredHeight();
    //
    // //如果剩余的空间不够，则移到下一行开始位置
    // if( mPainterPosX + width > mViewGroupWidth ) { 
    // mPainterPosX = left;
    // mPainterPosY += height;
    // }
    //
    // //执行ChildView的绘制
    // childView.layout(mPainterPosX,mPainterPosY,mPainterPosX+width, mPainterPosY+height);
    //
    // //记录当前已经绘制到的横坐标位置
    // mPainterPosX += width;
    // }
    // }
    
    
        @Override
        protected void onLayout(boolean changed, int l, int t, int r, int b) {
            int childCount = getChildCount();
            int autualWidth = r - l;
            int x = 0;// 横坐标开始
            int y = 0;//纵坐标开始
            int rows = 1;
            for(int i=0;i<childCount;i++){
                View view = getChildAt(i);
                int width = view.getMeasuredWidth();
                int height = view.getMeasuredHeight();
                x += width+TEXT_MARGIN;
                if(x>autualWidth){
                    x = width;
                    rows++;
                }
                y = rows*(height+TEXT_MARGIN);
                if(i==0){
                    view.layout(x-width-TEXT_MARGIN, y-height, x-TEXT_MARGIN, y);
                }else{
                    view.layout(x-width, y-height, x, y);
                }
            }
        };
    
        @Override
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            int x = 0;//横坐标
            int y = 0;//纵坐标
            int rows = 1;//总行数
            int specWidth = MeasureSpec.getSize(widthMeasureSpec);
            int actualWidth = specWidth - SIDE_MARGIN * 2;//实际宽度
            int childCount = getChildCount();
            for(int index = 0;index<childCount;index++){
                View child = getChildAt(index);
                child.setPadding(PADDING_HOR, PADDING_VERTICAL, PADDING_HOR, PADDING_VERTICAL);
                child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
                int width = child.getMeasuredWidth();
                int height = child.getMeasuredHeight();
                x += width+TEXT_MARGIN;
                if (x > actualWidth){
       //换行
                    x = width;
                    rows++;
                }
                y = rows*(height+TEXT_MARGIN);
            }
            setMeasuredDimension(actualWidth, y);
        }
    }

參考：  
[http://www.tuicool.com/articles/u2eEbe][http_www.tuicool.com_articles_u2eEbe]  
[http://ticktick.blog.51cto.com/823160/1542200/][http_ticktick.blog.51cto.com_823160_1542200]

Retrofit 2.0：有史以来最大的改进  
[http://www.tuicool.com/articles/BJjYFzv][http_www.tuicool.com_articles_BJjYFzv]

android系統定位:

// mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    // //篩選最後的定位方式
    // Criteria c = new Criteria();
    // c.setAccuracy(Criteria.ACCURACY_FINE); //精度高
    // c.setPowerRequirement(Criteria.POWER_LOW); //电量消耗低
    // c.setAltitudeRequired(false); //不需要海拔
    // c.setSpeedRequired(false); //不需要速度
    // c.setCostAllowed(false); //不需要费用
    // String provider = mLocationManager.getBestProvider(c, false); //false是指不管当前适配器是否可用
    // //1分鐘、距離大於200米獲取一次
    // mLocationManager.requestLocationUpdates(provider,60000, 200,mLocationListener);
    // Location location = mLocationManager.getLastKnownLocation(provider);
    // if (location!=null) { 
    // lat = location.getLatitude();
    // lng = location.getLongitude();

強烈不建議使用，很多機型獲取失敗！  
參考：  
[http://blog.csdn.net/dier4836/article/details/7351116][http_blog.csdn.net_dier4836_article_details_7351116]

[http_www.java2s.com_Tutorials_Java_java.lang.reflect_Field_0160_Field.getDeclaredAnnotations_.htm]: http://www.java2s.com/Tutorials/Java/java.lang.reflect/Field/0160__Field.getDeclaredAnnotations_.htm
[http_www.jcodecraeer.com_a_anzhuokaifa_androidkaifa_2015_0623_3097.html]: http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0623/3097.html
[http_www.tuicool.com_articles_u2eEbe]: http://www.tuicool.com/articles/u2eEbe
[http_ticktick.blog.51cto.com_823160_1542200]: http://ticktick.blog.51cto.com/823160/1542200/
[http_www.tuicool.com_articles_BJjYFzv]: http://www.tuicool.com/articles/BJjYFzv
[http_blog.csdn.net_dier4836_article_details_7351116]: http://blog.csdn.net/dier4836/article/details/7351116