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自定义接口实现类似于枚举的功能

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import android.support.annotation.IntDef;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Retention(RetentionPolicy.SOURCE)
@IntDef({PageTypeAnn.HOME_PAGE, PageTypeAnn.FOUND_PAGE, PageTypeAnn.CUSTOM_PAGE})
public @interface PageTypeAnn{
    int HOME_PAGE = 0;
    int FOUND_PAGE = 1; 
    int CUSTOM_PAGE = 2;
}

@Retention限制存在的时间

@IntDef限制传入的数据。（@StringDef、@LongDef）

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Retrofit

Retrofit2：一个网络请求的适配器，将一个基本的Java接口通过动态代理的方式翻译成一个HTTP请求，并通过OkHttp去发送请求。此外它还具有强大的可扩展性，支持各种格式转换以及RxJava。

参考链接

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代码片段记录

下拉刷新

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onPullDownRefresh:function() {
    // 监听该页面用户下拉刷新事件
    // 可以在触发时发起请求，请求成功后调用wx.stopPullDownRefresh()来结束下拉刷新
    var that = this;
    console.log('下拉拉拉')
    wx.showNavigationBarLoading();//在当前页面显示导航条加载动画
    //wx.startPullDownRefresh();
    wx.hideNavigationBarLoading();//隐藏导航条加载动画。
    wx.stopPullDownRefresh();//停止当前页面下拉刷新。
    that.setData({
        homeDataList: [],
        pageIndex: 1,
        showEndTxt: false
    })
    common.checkThreeRdSessionTimeOut(that);
},
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Spring quartz 时间配置规则

格式: [秒] [分] [小时] [日] [月] [周] [年]

序号 说明 是否必填 允许填写的值 允许的通配符
1 秒 是 0-59 , - * /
2 分 是 0-59 , - * /
3 小时 是 0-23 , - * /
4 日 是 1-31 , - * ? / L W
5 月 是 1-12 or JAN-DEC , - * /
6 周 是 1-7 or SUN-SAT , - * ? / L #
7 年 否 empty 或 1970-2099 , - * /
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NDK

NDK 全称是 Native Development Kit，是一组可以在 Android 应用中编写实现 C/C++ 的工具，可以在项目用自己写源代码构建，也可以利用现有的预构建库。

用途

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工具类：NoDoubleClickListener防止过快双击

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public abstract class NoDoubleClickListener implements View.OnClickListener{

    public static final int MIN_CLICK_DELAY_TIME = 1000;
    private long lastClickTime = 0;

    @Override
    public void onClick(View v) {
        long currentTime = Calendar.getInstance().getTimeInMillis();
        if (currentTime - lastClickTime > MIN_CLICK_DELAY_TIME){
            lastClickTime = currentTime;
            onNoDoubleClick(v);
        }
    }

    public abstract void onNoDoubleClick(View v);
}

使用：view.setOnClickListener(new NoDoubleClickListener(){})

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图片压缩后再上传

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private void uploadHeadPortrait(Uri imgUri) {
    compressPic(imgUri);
}

//压缩图片
private void compressPic(Uri uri){
    ImageCompress compress = new ImageCompress();
    ImageCompress.CompressOptions options = new ImageCompress.CompressOptions();
    //        options.uri = Uri.fromFile(new File(sourcePath));
    options.uri = uri;
    options.maxWidth=Constants.RESIZEBITMAP_WIDTH;
    options.maxHeight=Constants.RESIZEBITMAP_HEIGHT;
    Bitmap bitmap = compress.compressFromUri(ManagerJJActivity.this, options);
    saveCompressedPic(bitmap, uri);
}

//bitmap图片保存到手机指定路径
private void saveCompressedPic(Bitmap bitmap, Uri uri){
    boolean isSaved = BitmapUtils.setBitmapToFile(bitmap, Constants.COMPRESSED_PIC_PATH);
    if (isSaved){//保存成功用压缩后的图片进行上传
        Uri uri1 = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "compress.jpg"));
        uploadPic(uri1);
    }else {//未保存成功，用原图片进行上传
        uploadPic(uri);
    }
}

//从指定位置捞出来图片进行上传
private void uploadPic(Uri imgUri){
    if (null == loadingBar) {
        loadingBar = LoadingBar.make(findViewById(R.id.activity_manager_jj_rootlayout), new CustomLoadingFactory());
    }
    if (null != loadingBar) {
        loadingBar.show();
        loadingBar.setOnClickListener(null);
    }

    final String filepath;
    if (imgUri.toString().startsWith("file")) {
        filepath = imgUri.getPath();
    } else {
        filepath = UiHelper.getFilePathFromContentUri(imgUri, getContentResolver());
    }

    //采用okhttp3来进行网络请求
    String url = UrlManager.URL_IMAGEUPLOAD;
    OkHttpClient mOkHttpClient = new OkHttpClient.Builder()
        .connectTimeout(Constants.OKHTTPS_CONNECT_TIMEOUT, TimeUnit.MILLISECONDS)
        .readTimeout(Constants.OKHTTPS_READ_TIMEOUT, TimeUnit.MILLISECONDS)
        .writeTimeout(Constants.OKHTTPS_WRITE_TIMEOUT, TimeUnit.MILLISECONDS)
        .build();

    RequestBody formBody = new MultipartBody.Builder().setType(MultipartBody.FORM)
        //                .addFormDataPart("title","Square Logo")
        .addFormDataPart("file", "logo-square.png", RequestBody.create(MEDIA_TYPE_PNG, new File(filepath))).build();
    Request request = new Request.Builder().url(url).post(formBody).build();
    Call call = mOkHttpClient.newCall(request);
    call.enqueue(new Callback() {
        @Override
        public void onFailure(Call call, IOException e) {
            e.printStackTrace();
            dialogCancel();

            Message msg = new Message();
            msg.what = INFO_WHAT;
            msg.obj = Constants.UPLOAD_FAIL;
            myHandler.sendMessage(msg);
        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            dialogCancel();
            String str = response.body().string();
            Log.i(Constants.TAG, str);

            JSONObject jsonObject = JSONObject.parseObject(str);
            filePath = (String) jsonObject.get("data");
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Message msg = new Message();
                    msg.what = INFO_WHAT;
                    msg.obj = Constants.UPLOAD_SUCCES;
                    myHandler.sendMessage(msg);
                }
            });
        }

    });
}

上面用到底下的图片压缩、Bitmap处理：变圆、读取、存、缩放等

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