七夜的小屋

bug出现：在一个EditText中输入文字，拿到输入的文字view.text.trim()，存入map，继而使用了JSONObject（map）之后，JSONObject.toString()发现存进去个“null”。 bug原因：debug后发现view.text.trim()存进map的是个SpannableStringBuilder，JSONObject的构造是123456789101112131415public JSONObject(Map copyFrom) { this(); Map<?, ?> contentsTyped = (Map<?, ?>) copyFrom; for (Map.Entry<?, ?> entry : contentsTyped.entrySet()) { /* * Deviate from the original by checking that keys are non-null and ...

本文牵涉kotlin和rxjava的相关知识 12345678910111213141516171819202122232425//查询wifi信息需要申请权限，权限工具类就不要在意了，重点在下面PermissionUtils.permission(PermissionConstants.LOCATION).callback(object : PermissionUtils.SimpleCallback { override fun onGranted() { //通过授权后，开启一个等待框 progressDialog.show() // 每2秒发送一次事件 connectObs = Observable.interval(2, TimeUnit.SECONDS) // 取30次，还没连上就结束，算这次超时 .take(30) .subscribeOn(Schedulers.computation()) ...

有很多种方式，比如手动过滤类或名字，如下 12345678910111213Gson gson = new GsonBuilder().setExclusionStrategies(new ExclusionStrategy() { @Override public boolean shouldSkipField(FieldAttributes f) { //过滤掉字段名包含"age" return f.getName().contains("age"); } @Override public boolean shouldSkipClass(Class<?> clazz) { //过滤掉 类名包含 Bean的类 ...

有很多种方式，比如手动过滤类或名字，如下 12345678910111213Gson gson = new GsonBuilder().setExclusionStrategies(new ExclusionStrategy() { @Override public boolean shouldSkipField(FieldAttributes f) { //过滤掉字段名包含"age" return f.getName().contains("age"); } @Override public boolean shouldSkipClass(Class<?> clazz) { //过滤掉 类名包含 Bean的类 ...

惯例先贴代码 1234567891011121314151617181920212223242526272829303132<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/color ...

123456789101112131415 private val mPopTitle: PopupWindow by lazy { PopupWindow(initPopView()).apply {// 有了contentView后要先测量一下才能拿到正确的高度 contentView.measure(View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED) width = ScreenUtils.getScreenWidth() height = contentView.measuredHeight isOutsideTouchable = true isFocusable = true setBackgroundDrawable(ColorDrawable(resources.getColor(R.color.black_35 ...

Room是google在Architecture Components提出的一个持久化库，可以异步查询返回LiveData和Rxjava里的Maybe,Single,Flowable,其中LiveData和Flowable是可观测的查询。它们允许自动从数据库更新数据，从而刷新UI。 可以在UserDao里这么写， 12@Query(“SELECT * FROM Users WHERE id = :userId”)User getUserById(String userId); 但他有两个缺点：1、这是同步的，所以会阻塞。2、当user被修改的时候，我们总是需要手动调用这个方法。 在返回Maybe或Single的时候，确保subscribeOn调用了Scheduler的不同线程，而不是AndroidSchedulers.mainThread() 若想加上room对rxjava的支持，需要在build.gradle中添加以下内容 1234// RxJava support for Roomimplementation “android.arch.persistence.room:rxja ...

直接上源码 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061/** * Calls the specified function [block] and returns its result. */@kotlin.internal.InlineOnlypublic inline fun <R> run(block: () -> R): R = block()/** * Calls the specified function [block] with `this` value as its receiver and returns its result. */@kotlin.internal.InlineOnlypublic inline fun <T, R> T.run(block: T.() -> R): R = block()/** * Calls the specif ...

1、在util包下看到了几个文件，是文件不是class，打开一看 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475/* * Copyright (C) 2017 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicab ...

有时候compile一些库，特别是谷歌自己的库的时候，下不动。在项目里的gradle.properties下加上org.gradle.jvmargs=-DsocksProxyHost=127.0.0.1 -DsocksProxyPort=1080试试。此法对于gradle下载库有效，下载gradle本身应该是无效的。