最近阶段工作相关总结,微信支付/应用商店/FileDownLoader/编码转换/流式布局

1.Android微信支付回调区分
总的来说就是在request中使用 request.extData 字段进行自己业务的区分，比如充值/支付/分享等

private void wxPay(WeiPayModel.ResultData data,String payOrRecharge) {        IWXAPI api = WXAPIFactory.createWXAPI(mContext,Constant.APP_ID_WX);        api.registerApp(Constant.APP_ID_WX);        Log.d("MyInfo","data="+data.toString());        PayReq request = new PayReq();        request.appId = Constant.APP_ID_WX;        request.partnerId = data.getPartnerId();        request.prepayId= data.getPrepayId();        request.packageValue = "Sign=WXPay";        request.nonceStr= data.getNonceStr();        request.timeStamp= data.getTimeStamp();        request.sign= data.getSign();        request.extData=payOrRecharge;        api.sendReq(request);    }

然后在回调WXPayEntryActivity 中：

@Override    public void onResp(BaseResp baseResp) {        Log.d("MyInfo", "onPayFinish, errCode = " + baseResp.errCode+"errMsg="+baseResp.errStr);        if (baseResp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {            int errCord = baseResp.errCode;            if (errCord == 0) {                PayResp resps = (PayResp) baseResp;                String payType = resps.extData;                switch (payType) {                    case Constant.WEIPAY_RECHARGE:                        //充值成功                                  break;                    case Constant.WEIPAY_PAY:                         //支付成功                           break;                }            }else{                if(errCord==-2){                    ToastUtil.show(mContext,"用户取消!");                } else {                          ToastUtil.show(mContext,"支付失败!");                }            }            finish();        }    }

2.Android跳转到应用商店详情页面（更全面）
3.Android 利用FileDownloader进行多线程下载

//喜马拉雅app下载地址String url="http://s1.xmcdn.com/apk/MainApp_v6.6.93.3_c298_release_proguard_200803_and-a1.apk";                    ViewHolder holder=new ViewHolder(dialog,1);            String path=Environment.getExternalStorageDirectory()+"/customName.apk";            FileDownloader.getImpl().create(url)                    .setPath(path)                    .setCallbackProgressTimes(300)                    .setMinIntervalUpdateSpeed(400)                    .setTag(holder)                    .setListener(new FileDownloadSampleListener() {                        @Override                        protected void pending(BaseDownloadTask task, int soFarBytes, int totalBytes) {                            super.pending(task, soFarBytes, totalBytes);                            ((ViewHolder) task.getTag()).updatePending(task);                        }                        @Override                        protected void progress(BaseDownloadTask task, int soFarBytes, int totalBytes) {                            super.progress(task, soFarBytes, totalBytes);                            ((ViewHolder) task.getTag()).updateProgress(soFarBytes, totalBytes,                                    task.getSpeed());                        }                        @Override                        protected void error(BaseDownloadTask task, Throwable e) {                            super.error(task, e);                            ((ViewHolder) task.getTag()).updateError(e, task.getSpeed());                        }                        @Override                        protected void connected(BaseDownloadTask task, String etag, boolean isContinue, int soFarBytes, int totalBytes) {                            super.connected(task, etag, isContinue, soFarBytes, totalBytes);                            ((ViewHolder) task.getTag()).updateConnected(etag, task.getFilename());                        }                        @Override                        protected void paused(BaseDownloadTask task, int soFarBytes, int totalBytes) {                            super.paused(task, soFarBytes, totalBytes);                            ((ViewHolder) task.getTag()).updatePaused(task.getSpeed());                        }                        @Override                        protected void completed(BaseDownloadTask task) {                            super.completed(task);                            ((ViewHolder) task.getTag()).updateCompleted(task);                        }                        @Override                        protected void warn(BaseDownloadTask task) {                            super.warn(task);                            ((ViewHolder) task.getTag()).updateWarn();                        }                    })                    .start();

ViewHolder 类：

private class ViewHolder {        private ProgressDialog progressBar1;        private int viewHolderPosition;        public ViewHolder(final ProgressDialog progressBar1,                          final int position) {            this.progressBar1 = progressBar1;            this.viewHolderPosition = position;        }        private void updateSpeed(int speed) {            Log.d("MyInfo","updateSpeed"+String.format("下载速度：   %dKB/s", speed));        }        public void updateProgress(final int sofar, final int total, final int speed) {            if (total == -1) {                // chunked transfer encoding data                progressBar1.setIndeterminate(true);            } else {                progressBar1.setMax(total/1024/1024);                progressBar1.setProgress(sofar/1024/1024);            }            updateSpeed(speed);        }        public void updatePending(BaseDownloadTask task) {            Log.d("MyInfo","updatePending 下载名称 ："+task.getFilename());        }        public void updatePaused(final int speed) {            Log.d("MyInfo","updatePaused "+String.format("updatePaused 已停止下载 ", viewHolderPosition));            updateSpeed(speed);            progressBar1.setIndeterminate(false);        }        public void updateConnected(String etag, String filename) {            Log.d("MyInfo","updateConnected 名称 ："+filename+",etag:"+etag);        }        public void updateWarn() {            Log.d("MyInfo","updateWarn "+String.format("warn %d", viewHolderPosition));            progressBar1.setIndeterminate(false);        }        public void updateError(final Throwable ex, final int speed) {            Log.d("MyInfo","updateError "+String.format("error %d %s", viewHolderPosition, ex));            updateSpeed(speed);            progressBar1.setIndeterminate(false);            progressBar1.dismiss();            ex.printStackTrace();            //发送消息            Message message=updateHandler.obtainMessage();            message.what=1;            message.obj="update";            updateHandler.sendMessage(message);        }        public void updateCompleted(final BaseDownloadTask task) {            Log.d("MyInfo","updateCompleted："+String.format("下载完成，下载路径 %d %s", viewHolderPosition, task.getTargetFilePath()));            updateSpeed(task.getSpeed());//            progressBar1.setIndeterminate(false);            progressBar1.setMax(task.getSmallFileTotalBytes()/1024/1024);            progressBar1.setProgress(task.getSmallFileSoFarBytes()/1024/1024);            progressBar1.dismiss();            //下载完成,              }    }

4.在线编码转换
5.自定义流式布局,修改FlowLayout源码,让其支持设置最大行数
ps: 5本人接到产品需求，只显示一行，最后多余的部分显示 … 省略号
类如下：
做了稍微的改动：(不喜勿喷，欢迎指正)

package com.wy.simula.widget.view;import android.content.Context;import android.graphics.Canvas;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;import android.widget.FrameLayout;import android.widget.TextView;import com.wy.simula.R;import com.wy.simula.util.DisplayUtils;import java.util.ArrayList;import java.util.Collections;import java.util.List;/** * 流式布局  https://github.com/hongyangAndroid/FlowLayout *  * Change by mChenys on 2019/1/8. * 修改后,支持行数限制,优化了在onLayout的时候的二次循环初始化参数,支持获取当前可见的item个数 */public class FlowLayout extends ViewGroup {    private static final String TAG = "FlowLayout";    protected static final int LEFT = -1;    protected static final int CENTER = 0;    protected static final int RIGHT = 1;    protected List> mAllViews = new ArrayList>();//记录所有行    protected List mLineHeight = new ArrayList();//记录所有行高    protected List mLineWidth = new ArrayList();//记录所有行宽    protected List lineViews = new ArrayList<>();//临时记录每行的view    protected int mGravity;    private int maxLine = -1;//最大行数    private boolean isExceedingMaxLimit; //预设的子View是否超出了最大行数限制    public void setMaxLine(int maxLine) {        this.maxLine = maxLine;    }    public FlowLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        mGravity = LEFT;    }    public FlowLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public FlowLayout(Context context) {        this(context, null);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        mAllViews.clear();//记录所有行的view        mLineHeight.clear();//记录每一行的高度        mLineWidth.clear();//记录每一行的宽度        lineViews.clear();//记录每一行的view        isExceedingMaxLimit=false;        int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);        int modeWidth = MeasureSpec.getMode(widthMeasureSpec);        int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);        int modeHeight = MeasureSpec.getMode(heightMeasureSpec);        // wrap_content 最终宽高        int width = 0;        int height = 0;        //当前已用行宽高        int lineWidth = 0;        int lineHeight = 0;        int cCount = getChildCount();        for (int i = 0; i < cCount; i++) {            View child = getChildAt(i);            if (child.getVisibility() == View.GONE) {                continue;            }            //测量子view            measureChild(child, widthMeasureSpec, heightMeasureSpec);            MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();            //子View宽高            int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;            int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;            if (lineWidth + childWidth > sizeWidth - getPaddingLeft() - getPaddingRight()) {                if (maxLine > 0 && mAllViews.size() + 1 >= maxLine) { //+1是因为后面还有最后一行                    isExceedingMaxLimit = true;                    break;//超过最大行数跳出循环                }                //需要换行                if (i == 0 && width == 0 && lineWidth == 0 && height == 0 && lineHeight == 0) {                    //如果第一个子View就满足换行条件,那么width和height就是子View的宽高                    width = lineWidth = childWidth;                    height = lineHeight = childHeight;                    lineViews.add(child);                } else {                    width = Math.max(width, lineWidth);//记录最大行宽                    height += lineHeight;//累加包裹内容所需的高度                }                //换行前,保存当前行数据                mLineHeight.add(lineHeight);                mLineWidth.add(lineWidth);                mAllViews.add(lineViews);                //换行,新行数据初始化                lineWidth = 0;//重新赋值行宽                lineHeight = 0;//重新赋值行高                lineViews = new ArrayList();//创建新行                if (i == 0 && width > 0 && height > 0) {                    //如果第一个子View就满足换行条件并且数据已经保存,则不需要下面重复添加了                    continue;                }            }            //新行或者当前行继续添加子View            lineWidth += childWidth;//累加行宽            lineHeight = Math.max(lineHeight, childHeight);//取当前行最大高度作为行高            lineViews.add(child);        }        //添加最后一行数据        width = Math.max(lineWidth, width);//包裹内容所需的最大宽度        height += lineHeight;//累加高度        mLineHeight.add(lineHeight);        mLineWidth.add(lineWidth);        mAllViews.add(lineViews);        setMeasuredDimension(                //父控件宽高确定则用确定的,否则用测量后的                modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width + getPaddingLeft() + getPaddingRight(),                modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height + getPaddingTop() + getPaddingBottom()//        );    }    @Override    protected void onLayout(boolean changed, int l, int t, int r, int b) {        //总宽        int width = getWidth();        //当前已用行宽高        int lineHeight = 0;        //下面是对每一行的View进行布局        int left = getPaddingLeft();        int top = getPaddingTop();        int lineNum = mAllViews.size();        for (int i = 0; i < lineNum; i++) {            //获取当前行和行高            lineViews = mAllViews.get(i);            lineHeight = mLineHeight.get(i);            // set gravity            int currentLineWidth = this.mLineWidth.get(i);            switch (this.mGravity) {                case LEFT:                    left = getPaddingLeft();                    break;                case CENTER:                    left = (width - currentLineWidth) / 2 + getPaddingLeft();                    break;                case RIGHT:                    //  适配了rtl，需要补偿一个padding值 ,从右边向左开始布局                    left = width - (currentLineWidth + getPaddingLeft()) - getPaddingRight();                    //  适配了rtl，需要把lineViews里面的数组倒序排,从右边开始存放view                    Collections.reverse(lineViews);                    break;            }            //开始布局            for (int j = 0; j < lineViews.size(); j++) {                View child = lineViews.get(j);                if (child.getVisibility() == View.GONE) {                    continue;                }                MarginLayoutParams lp = (MarginLayoutParams) child                        .getLayoutParams();                int childWidth=0;                //超过了一行，超过显示 ...省略号                if(maxLine==1&&i==0&&isExceedingMaxLimit&&j==lineViews.size()-1&&j!=0){                    childWidth=DisplayUtils.dp2px(getContext(),35);                    TextView textView= child.findViewById(R.id.flowLayout_text);                    FrameLayout.LayoutParams layoutParams= (FrameLayout.LayoutParams) textView.getLayoutParams();                    layoutParams.width=DisplayUtils.dp2px(getContext(),25);                    textView.setLayoutParams(layoutParams);                    textView.setText("...");                    child.measure(childWidth,child.getMeasuredHeight());//重新测量                    postInvalidate();//刷新视图                }else{                    childWidth=child.getMeasuredWidth();                }//                int childWidth=child.getMeasuredWidth();                int lc = left + lp.leftMargin;                int tc = top + lp.topMargin;                int rc = lc + childWidth;                int bc = tc + child.getMeasuredHeight();                child.layout(lc, tc, rc, bc);//布置child 位置                //更新下一个view添加到当前行的left                left += childWidth + lp.leftMargin                        + lp.rightMargin;            }            //更新下一个view添加到下一行的top            top += lineHeight;//            if(i==lineNum-1){//                for (int j = 0; j < mAllViews.size(); j++) {//                    Log.d("MyInfo","FlowLayout:"+mAllViews.size()+",line size:"+mAllViews.get(i).size());//                }//            }        }    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);    }    @Override    public LayoutParams generateLayoutParams(AttributeSet attrs) {        return new MarginLayoutParams(getContext(), attrs);    }    @Override    protected LayoutParams generateDefaultLayoutParams() {        return new MarginLayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);    }    @Override    protected LayoutParams generateLayoutParams(LayoutParams p) {        return new MarginLayoutParams(p);    }    /**     * 获取指定行数内的item个数     *     * @return 每行的个数之和     * @lineNum 总行数     */    public int getTotalByLine(int lineNum) {        int count = 0;        if (lineNum <= mAllViews.size()) {            for (int i = 0; i < lineNum; i++) {                List line = mAllViews.get(i);                count += line.size();            }        } else {            for (int i = 0; i < mAllViews.size(); i++) {                List line = mAllViews.get(i);                count += line.size();            }        }        return count;    }    /**     * 返回总行数     *     * @return     */    public int getTotalLine() {        return mAllViews.size();    }    /**     * 设置的数据是否超过了最大限制     *     * @return     */    public boolean isExceedingMaxLimit() {        return isExceedingMaxLimit;    }}

使用也比较简单：

        //设置标签        List labelList=model.getTagList();        if(labelList!=null&&labelList.size()>0){            flv_labelType.removeAllViews();            flv_labelType.setMaxLine(1);//设置最大显示一行            for (int i = 0; i < labelList.size(); i++) {                View view = View.inflate(mContext, R.layout.item_flow_layout, null);                TextView skillText = (TextView) view.findViewById(R.id.flowLayout_text);                skillText.setText(labelList.get(i).getName());                flv_labelType.addView(view);            }        }

xml布局:

<?xml version="1.0" encoding="utf-8"?>

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