1.一个APP只需要一个Activity
//片段fragment
implementation 'me.yokeyword:fragmentation:1.3.6'
implementation 'me.yokeyword:fragmentation-swipeback:1.3.6'
2.懒人必备查找控件
//ButterKnife(10.0必须适配AndroidX,9.0需要java8,快速生成插件android-butterknife-zelezny)
implementation 'com.jakewharton:butterknife:9.0.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:9.0.0'
3.方法数超过65k,合并
- a.引入jar包
implementation "com.android.support:multidex:1.0.3"
- b.配置合并dex为开启
defaultConfig {
multiDexEnabled true
}
- c.在自己的MyApplication下的方法中初始化
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(this);
}
4.新版本的Gradle,需要至少在一个Activity中的 <intent-filter>里面添加:
<action android:name="android.intent.action.VIEW" />
5.拉的自己封装的工具类需要去掉,.git的关联
https://blog.csdn.net/lyj1005353553/article/details/55519487
6.设置去掉所有的页面标题栏
在AppTheme中配置
<item name="windowNoTitle">true</item>
7.快速构建Builder插件
innerbuilder插件
8.使用Dagger2无法找到对于的Component类,
a.必须在基类的onCreate方法中注入
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DaggerCommonComponent.create().inject(this);
}
而不要注入到另一个onCreate中
@Override
public void onCreate( @Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
}
9.RecyclerView嵌套ScrollView不流畅
recyclerView.setHasFixedSize(true);
recyclerView.setNestedScrollingEnabled(false);
垂直滑动问题:
https://segmentfault.com/a/1190000011553735
recyclerview嵌套在NestedScrollView里,一次性加载出全部数据问题
https://github.com/CymChad/BaseRecyclerViewAdapterHelper/issues/1954
Android SwipeRefreshLayout和RecyclerView嵌套时 下拉刷新冲突的解决办法
https://blog.csdn.net/peirato_/article/details/54913195
针对RecyclerView不显示
只需要设置ScrollView的属性android:layout_height="match_parent" android:fillViewport="true" 就OK了。
- 监听RecyclerView滚动距离
//RecyclerView滚动监听
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
switch (newState){
case RecyclerView.SCROLL_STATE_IDLE://现在不是滚动状态
L.e("滚动的距离=="+direction);
break;
case RecyclerView.SCROLL_STATE_DRAGGING://手指 拖动
break;
case RecyclerView.SCROLL_STATE_SETTLING://惯性滚动
break;
}
}
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
//计算RecyclerView滚动的距离
direction += dy;
}
});
10.Retrofit网络请求,生成
private static void setRetrofit(String defaultHost) {
retrofit = new Retrofit.Builder()
.baseUrl(defaultHost)
.client(okHttpClient)
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(JSONObjectConverterFactory.create())
.addConverterFactory(GsonConverterFactory.create()).build();
}
其中JSONObjectConverterFactory和GsonConverterFactory不能共存,如果想返回JSONObject对象,去掉 .addConverterFactory(GsonConverterFactory.create())如果想直接生成Object对象,去掉.addConverterFactory(JSONObjectConverterFactory.create())
11.TextView加入删除线
tv.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);
代码中绘制左侧图片
Drawable img = layout.getResources().getDrawable(R.drawable.icon);
// 调用setCompoundDrawables时,必须调用Drawable.setBounds()方法,否则图片不显示
img.setBounds(0, 0, img.getMinimumWidth(), img.getMinimumHeight());
textView.setCompoundDrawables(img, null, null, null); //设置左图标
文字滚动消息:
< TextView
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:focusable ="true"
android:focusableInTouchMode ="true"
android:marqueeRepeatLimit ="marquee_forever"
android:ellipsize ="marquee"
android:singleLine ="true"
android:text ="那么什么是成功的人生,什么样的人又是成功人士呢?像科技界的比尔?盖茨 ,乔布斯 ,商界的巴菲特以及娱乐、体育界的大腕,无疑会被人们视为是成功者。但对于普通民众,如果用比尔?盖茨那样的标准来衡量是否成功似乎有些太苛刻,也不现实。在某种观念中,一个人的成功似乎与财富分不开的。很多国人到美国看到华人最常说的一句话是,你是个成功人士。为什么这么说?因为你能住300平方米、价值百万美元的房子,因为你开的车是奔驰 、宝马等豪华车,因为你有好的工作,年薪至少在10万美元以上。这也许是很多国人看待一个人成功与否的主要标志。但在美国人眼里,成功并不是与拥有众多财富密不可分。在1980年代,多数美国人把拥有更多财富看成人生成功的一个主要标志。而在一项最新的调查中,对于美国人来说,财富不再是成功的最重要组成部分。调查中22个成功人生的潜在组成因素中,“有很多钱”仅排名在第20位。" />
12.对Retrofit回调进行封装,只输出正确和错误信息
13.EditText变搜索按钮,并监听搜索事件
https://www.cnblogs.com/epmouse/p/6237274.html
14.CoordinatorLayout布局要设置滚动控件的
app:layout_behavior="@string/appbar_scrolling_view_behavior"
里面的字符串爆红,但还是可以运行,但红色总是不好看的,可能是新版本的sdk引起的,所以需要改为
app:layout_behavior ="android.support.design.widget.AppBarLayout$ScrollingViewBehavior"
15.WebView不跳转到外部浏览器
class MyWebViewClient extends WebViewClient{
//不跳转到外部浏览器
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
Android webview loadData 中文乱码
https://www.jianshu.com/p/85957f003dd4
16.WebView出现net::ERR_UNKNOWN_URL_SCHEME错误
https://www.jianshu.com/p/119823e5cfb5
17.Glide显示图片为上面圆角,下面直角
让Glide输出指定位置的圆角图片 2018年,部分方法为Glide4.0以前的,所以无法使用,但方法值得借鉴
Glide 加载部分圆角图片2019年,新的方法,且行为更合理
圆角不圆:有可能是因为图片高度或宽度过大,导致部分圆角不圆
Glide ViewTarget及SimpleTarget加载问题:
18.View转换为Bitmap
关于View转化成bitmap保存成图片
两个Bitmap合并为一个
Android:将一个Activity、某块布局转换成图片
19.使用xml绘制虚线好后,4.0以上需要使用 android:layerType="software"属性,不然虚线会变为实线
https://blog.csdn.net/Small_Lee/article/details/52153557
20.微信分享到朋友圈,调用系统分享,需要对Uri单独处理一下
https://blog.csdn.net/qq_34900897/article/details/85320646
21.support版本冲突的解决办法
https://blog.csdn.net/yuzhiqiang_1993/article/details/78214812
22.TabLayout+ViewPager垂直方向联动,用于分类页面
https://www.jianshu.com/p/9266e58cc4f5
23.精确计算RecyclerView滑动高度
24.adb无线调试
https://jingyan.baidu.com/article/066074d610f4f3c3c21cb0ab.html
25.打包名称自定义
https://www.cnblogs.com/bluestorm/p/6228085.html
https://blog.csdn.net/weixin_33709364/article/details/87160660
打包方法过时警告:https://www.cnblogs.com/blogs-of-lxl/p/10306145.html
我的通用命名方式:包名最后一部分+版本名称+时间+打包方式 taobao_v1.0_2019-05-20_release
在android{}里面写入
android.applicationVariants.all { variant ->
variant.outputs.all{
outputFileName = "${applicationId.subSequence(applicationId.lastIndexOf(".")+1,applicationId.length())}_v${versionName}_${releaseTime()}_${baseName}.apk"
}
}
其中releaseTime()为写在android{}外部的一个方法
def releaseTime() {
return new Date().format("yyyy-MM-dd", TimeZone.getTimeZone("UTC"))
}
26.apk签名打包
如何配置签名:
https://www.cnblogs.com/details-666/p/keystore.html
如何判断你的apk是否已经签名:
https://blog.csdn.net/qq_21376985/article/details/53337977
27.混淆
https://blog.csdn.net/qq634416025/article/details/79686051
28.TextView设置可滚动的方式
xml中设置TextView属性
android:scrollbars="vertical"
同时代码中设置
textView.setMovementMethod(ScrollingMovementMethod.getInstance());
29.Android:通过Glide保存图片到本地,并同步到相册
30.Android 调用系统分享(不使用第三方),指定QQ、微信等
https://blog.csdn.net/u010356768/article/details/78246691
qq空间限制:
https://blog.csdn.net/weixin_41239127/article/details/78743421
31.安卓从imageview中获得bitmap的方法
https://blog.csdn.net/yj1499945/article/details/47079621
32.怎样获取到Android控件的高度,通过监听的方式
https://www.jianshu.com/p/2c8e5324ec68
你可能也不知道为什么,第一次进入页面,获取控件的高度有值,再次进入获取的高度居然为0,再再再次进入也为0,杀掉应用,进入页面又有高度了,再次进入又为0。因为我需要通过view来获取Bitmap,那么View的宽高值必不可少,所以我通过上面博客的方法去监听控件的高度才拿到值。但为什么只有第一次进入才能拿到宽高值却拜师不得琪姐,请各位大老解答。
33.AccessibilityService获取控件信息getRootInActiveWindow() 经常为null
https://blog.csdn.net/qq_28210079/article/details/80486592
33.解决android.permission.WRITE_APN_SETTINGS
https://blog.csdn.net/qq_36437339/article/details/81015715
34.新手引导库
在Fragment中由于控件位置绘制流程和生命周期的关系,需要监听控件View宽高,有值后才进行引导层的绘制,同时用Handler进行一定的延迟绘制,保证高亮区域的定位精确度
35.Java中对对象进行排序
https://blog.csdn.net/qq_37937537/article/details/80445731
通过Comparable
36.监控当前APP是否回到前台
https://www.jianshu.com/p/101eb42d0fde
37.使用java8新特性快速的打印输出序列对象
allList.stream().map(User::toString).forEach(L::e);
38.Fragment的优化
不要再Activity中使用List来保存Fragment
https://blog.csdn.net/qq_30993595/article/details/80736814
39.ViewPager2,支持横竖布局,支持0预加载布局
https://juejin.im/post/5cda3964f265da035d0c9d8f
40.RadioGroup.onCheckedChanged() 会调用多次
https://blog.csdn.net/qq_32452623/article/details/80474487
41.Retrifit2上传图片
https://www.cnblogs.com/zhujiabin/p/7601658.html
42.Java多线程
43.ArrayList进行排序
24版本以前的老方法:
Collections.sort(arrays);
新方法
arrays.sort();
44.对时间的转换,对比,添加,格式输出
45. tools:replace的使用
tools:replace=""有时候需要替换多个项,使用逗号分割
tools:replace="android:allowBackup,android:appComponentFactory"
46. 解决 导入三方时出现: appComponentFactory 错误
https://blog.csdn.net/qq_34224268/article/details/83861897
47. 滚轮时间选择器
可以采用 XPopup和WheelPicker
组合的方式来生成一个时间选择器如:https://www.jianshu.com/p/4a2c853d9276
48. fragment里coordinatorlayout+viewpager无法正常滑动问题
fragment里coordinatorlayout+viewpager无法正常滑动问题
有人说fragment是无法运行协调者布局的,这是错误的
解决方法:在你的viewpager子fragment里面布局最外面套上一层NestedScrollView就可以了
49.查看SHA1命令
keytool -list -v -keystore C:\Users\Desktop\browser\debug.keystore -storepass android
50.RecyclerView横向分页菜单
https://blog.csdn.net/u014165119/article/details/46834265
51.ArgbEvaluator一个计算颜色渐变值的类
https://blog.csdn.net/u013581141/article/details/68063469
使用事例:自定义CoordinatorLayout.Behavior颜色渐变的TitleBar
52.交互效果咋了系列:
53.数据绑定DataBind
android {
…
dataBinding {
enabled = true
}
}
告别findView和ButterKnife
Android开发教程 - 使用Data Binding(七)使用BindingAdapter简化图片加载
54.错误检查命令
gradlew processDebugManifest --stacktrace
55.new Handler的警告说明和解决办法@SuppressLint(“HandlerLeak”)
https://blog.csdn.net/androidsj/article/details/79865091
private MyHandler myHandler = new MyHandler(_mActivity);
private static class MyHandler extends Handler {
WeakReference weakReference;
public MyHandler(Activity activity) {
weakReference = new WeakReference(activity);
}
@Override
public void handleMessage(Message msg) {
}
}
另一种写法:
private Handler mHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
return false;
}
});
56.多行且需要最后显示省略号的警告处理
logcat 总是报: W/StaticLayout: maxLineHeight should not be -1. maxLines:1 lineCount:1
57.通知无法显示:8.0需要设置渠道和权重
https://www.jianshu.com/p/f85ef58edf63
58.uri指向了外部应用exposed beyond app through RemoteViews.setUri()
在Application中的onCreate方法中添加如下
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
builder.detectFileUriExposure();
59.解决因为弹窗导致TextView停止滚动的问题:
https://www.jianshu.com/p/22b4aff0dc8e
60.弹窗需要一个自定义的三角形SanJiaoView
:
https://blog.csdn.net/ZhangLei280/article/details/73207669
61.升级AndroidX后出现缺失AppBarLayout$ScrollingViewBehavior
https://www.jianshu.com/p/6b8104787617
62.APP启动时间,性能优化,启动页白屏
https://www.jianshu.com/p/75b0b128c470
63.AndroidStudio安装失败
image.png方法一:clean项目
方法二:重启大法:重启AndroidStudio,重启手机,重启电脑,重启...
方法三:检查是否只开启了开发者模式和USB调试,却没有开启了USB安装
image.png
64.adb命令
https://www.jianshu.com/p/56fd03f1aaae
65.ConstraintLayout基础 及动态控件(动画效果)
https://www.jianshu.com/p/7888cde8292f
66.获取videoView第一针视频报错:
https://blog.csdn.net/guohesheng/article/details/80236799
67.Math函数相关计算
//角度换算为对应数值
double skewRot = Math.toRadians(30);
68. banner库一张图片无效和第一次进入没有轮播的时候点击第一张无效
一张图片的时候需要设置banner
的onClick
事件,多张图第一次还未开始轮播点击无效,需要先设置点击事件,再调用banner
的start
方法
69. <activity-alias> 标签的使用
70.Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK
https://blog.csdn.net/watermusicyes/article/details/44963773
71.程序崩溃日志收集
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, final Throwable ex) {
// Custom code here to handle the error.
L.e("发生崩溃=="+thread.getName()+" =="+ex.getMessage());
}
});
72.Android Q正式发布。新一代的安卓系统非常注重对用户隐私的保护,它限制APP获取IMEI、DEVICE ID等移动端设备标识码,解决方案:
简书:https://www.jianshu.com/p/df3f549ddd35
官方:https://developer.android.google.cn/training/articles/user-data-ids
73.再按一次退出程序
private long firstTime = 0;
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
long secondTime = System.currentTimeMillis();
//如果两次按键时间间隔大于2秒,则不退出
if (secondTime - firstTime > 2000) {
Toast.makeText(this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
firstTime = secondTime;//更新firstTime
return true;
//两次按键小于2秒时,退出应用
} else {
System.exit(0);
}
break;
}
return super.onKeyUp(keyCode, event);
}
如果是Fragment请不要复写onBackPressed()方法,改为复写onBackPressedSupport():
//再按一次退出程序
private long firstTime = 0;
@Override
public void onBackPressedSupport() {
long secondTime = System.currentTimeMillis();
if (getSupportFragmentManager().getBackStackEntryCount() == 1 && secondTime - firstTime > 2000) {
Toast.makeText(this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
firstTime = secondTime;
} else {
super.onBackPressedSupport();
}
}
74.AndroidX升级日记
https://www.jianshu.com/p/55645eb89214
75.AndroidStudio启动模拟器Android10.0报错
Emulator: Process finished with exit code -1073741819 (0xC0000005)
https://stackoverflow.com/questions/47631771/emulator-process-finished-with-exit-code-1073741819-0xc0000005
76.简单实现ImageView宽度填满屏幕,高度自适应的两种方式
https://www.jianshu.com/p/c9424615e99d
77.RecyclerView瀑布流问题
https://www.jianshu.com/p/4e142909b824
https://blog.csdn.net/tobevan/article/details/78924338
78.android studio关闭字符串资源多语言提示
https://blog.csdn.net/sinat_26814541/article/details/97757535
79.ConstraintLayout 采用代码方式布局用法简介
http://xgfe.github.io/2017/09/17/ivanchou/layout-with-constraintlayout-by-programming/
80.Glide获得图片资源,并高斯模糊
try {
Drawable drawable = Glide.with(mContext)
.load(item.getImage_url())
.apply(RequestOptions.bitmapTransform(new BlurTransformation(15, 1)))
.submit().get();
layoutRoot.setBackground(drawable);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
高斯模糊
public class BlurTransformation extends BitmapTransformation {
private static final int VERSION = 1;
private static final String ID = "BlurTransformation." + VERSION;
private static int MAX_RADIUS = 25;
private static int DEFAULT_DOWN_SAMPLING = 1;
private int radius;
private int sampling;
public BlurTransformation() {
this(MAX_RADIUS, DEFAULT_DOWN_SAMPLING);
}
public BlurTransformation(int radius) {
this(radius, DEFAULT_DOWN_SAMPLING);
}
public BlurTransformation(int radius, int sampling) {
this.radius = radius;
this.sampling = sampling;
}
@Override
protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
int width = toTransform.getWidth();
int height = toTransform.getHeight();
int scaledWidth = width / sampling;
int scaledHeight = height / sampling;
Bitmap bitmap = pool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.scale(1 / (float) sampling, 1 / (float) sampling);
Paint paint = new Paint();
paint.setFlags(Paint.FILTER_BITMAP_FLAG);
canvas.drawBitmap(toTransform, 0, 0, paint);
bitmap = FastBlur.blur(bitmap, radius, true);
return bitmap;
}
@Override public String toString() {
return "BlurTransformation(radius=" + radius + ", sampling=" + sampling + ")";
}
@Override public boolean equals(Object o) {
return o instanceof BlurTransformation &&
((BlurTransformation) o).radius == radius &&
((BlurTransformation) o).sampling == sampling;
}
@Override public int hashCode() {
return ID.hashCode() + radius * 1000 + sampling * 10;
}
@Override public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
messageDigest.update((ID + radius + sampling).getBytes(CHARSET));
}
}
81.Glide获得获取图片主体色系
Glide.with(mContext).load(item.getImage_url())
.listener(GlidePalette.with(item.getImage_url())
.use(GlidePalette.Profile.VIBRANT)
.intoBackground(layoutRoot, GlidePalette.Swatch.RGB)
.crossfade(true)
).into(imageView);
82.Android获取内网IP
方法一:
package com.rongyan.clienttest;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class NetWorkUtil {
//匹配C类地址的IP
public static final String regexCIp = "^192\\.168\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)$";
//匹配A类地址
public static final String regexAIp = "^10\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)$";
//匹配B类地址
public static final String regexBIp = "^172\\.(1[6-9]|2\\d|3[0-1])\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)\\.(\\d{1}|[1-9]\\d|1\\d{2}|2[0-4]\\d|25\\d)$";
public static String getHostIp() {
String hostIp;
Pattern ip = Pattern.compile("(" + regexAIp + ")|" + "(" + regexBIp + ")|" + "(" + regexCIp + ")");
Enumeration<NetworkInterface> networkInterfaces = null;
try {
networkInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
e.printStackTrace();
}
InetAddress address;
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
address = inetAddresses.nextElement();
String hostAddress = address.getHostAddress();
Matcher matcher = ip.matcher(hostAddress);
if (matcher.matches()) {
hostIp = hostAddress;
return hostIp;
}
}
}
return null;
}
}
方法二:
public String getWifiIp() {
//获取wifi服务
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
//判断wifi是否开启
if (!wifiManager.isWifiEnabled()) {
wifiManager.setWifiEnabled(true);
}
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();
return intToIp(ipAddress);
}
//获取Wifi ip 地址
private String intToIp(int i) {
return (i & 0xFF) + "." +
((i >> 8) & 0xFF) + "." +
((i >> 16) & 0xFF) + "." +
(i >> 24 & 0xFF);
}
参考:https://www.cnblogs.com/jxust-jiege666/p/8168149.html
83.Android获取外网IP
参考:https://www.jianshu.com/p/1e3eaf887191
方法一,通过访问第三方接口地址来获取
import org.json.JSONException;
import org.json.JSONObject;
/**
* 获取外网IP地址
* @return
*/
public void GetNetIp() {
new Thread(){
@Override
public void run() {
String line = "";
URL infoUrl = null;
InputStream inStream = null;
try {
infoUrl = new URL("http://pv.sohu.com/cityjson?ie=utf-8");
URLConnection connection = infoUrl.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection) connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
inStream = httpConnection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inStream, "utf-8"));
StringBuilder strber = new StringBuilder();
while ((line = reader.readLine()) != null)
strber.append(line + "\n");
inStream.close();
// 从反馈的结果中提取出IP地址
int start = strber.indexOf("{");
int end = strber.indexOf("}");
String json = strber.substring(start, end + 1);
if (json != null) {
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(json);
} catch (JSONException e) {
e.printStackTrace();
}
line = jsonObject.optString("cip");
}
L.e("line=="+line);
Message msg = new Message();
msg.what = 1;
msg.obj = line;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
84.颜色均匀渐变的动画
ValueAnimator animator = ValueAnimator.ofInt(0xffffff00,0xff0000ff);
animator.setEvaluator(new ArgbEvaluator());
animator.setDuration(3000);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
int curValue = (int)animation.getAnimatedValue();
tv.setBackgroundColor(curValue);
}
});
animator.start();
85.Android的cpu架构7种
参考:https://blog.csdn.net/u012400885/article/details/52923765
https://www.jianshu.com/p/f29ad4beef59
86.'gradle' 不是内部或外部命令,也不是可运行的程序 或批处理文件
https://blog.csdn.net/u014743890/article/details/84316176
87.使用ImmersionBar
时,加载出现Dialog的显示会导致导航栏出现不消失:
88.Dagger2-Android不支持泛型Activity的注入
https://blog.csdn.net/ybf326/article/details/82931587
89.删除git配置
删除90.把本地项目复制到github
分享91.AndroidStudio设置github账号
image.png92.邀请码识别来源
93.Android 自动抓取网站图标实现分享样式的定制
https://blog.csdn.net/dnsliu/article/details/57122535
94.Fragment实现懒加载
https://blog.csdn.net/vic6329063/article/details/82838430
95.版权登记
http://www.ccopyright.com/index.php?optionid=1216
96.获取随机颜色值
分别取rgb的随机值(0~256),然后加起来就是一个随机颜色值,通过Color.parseColor()转为color值即可使用:
public static String getRandColor() {
String R, G, B;
Random random = new Random();
R = Integer.toHexString(random.nextInt(256)).toUpperCase();
G = Integer.toHexString(random.nextInt(256)).toUpperCase();
B = Integer.toHexString(random.nextInt(256)).toUpperCase();
R = R.length() == 1 ? "0" + R : R;
G = G.length() == 1 ? "0" + G : G;
B = B.length() == 1 ? "0" + B : B;
return "#" + R + G + B;
}
97.Glide设置圆角图片后设置ImageVIew的scanType="centerCrop"无效解决办法
https://www.jianshu.com/p/95d3f64a48dc
RequestOptions options = new RequestOptions()
.transform(new CenterCrop(),new RoundedCorners(18))
.placeholder(R.drawable.no_banner)
.error(R.drawable.no_banner);
Glide.with(context).load(path)
.apply(options)
.thumbnail(0.1f)
.into(imageView);
98.线性渐变字体
https://blog.csdn.net/negineko/article/details/100033250
public class GradientColorTextView extends AppCompatTextView {
private Rect mTextBound = new Rect();
public GradientColorTextView (Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
int mViewWidth = getMeasuredWidth();
Paint mPaint = getPaint();
String mTipText = getText().toString();
mPaint.getTextBounds(mTipText, 0, mTipText.length(), mTextBound);
@SuppressLint("DrawAllocation") LinearGradient mLinearGradient = new LinearGradient(0, 0, mViewWidth, 0, new int[]{0xFFFF0000, 0xFF5400FF}, null, Shader.TileMode.REPEAT);
mPaint.setShader(mLinearGradient);
canvas.drawText(mTipText, getMeasuredWidth() / 2 - mTextBound.width() / 2, getMeasuredHeight() / 2 + mTextBound.height() / 2, mPaint);
}
}
99.TextView 设置其他字体后,显示不全的问题
https://blog.csdn.net/u010979599/article/details/86650297
https://www.jianshu.com/p/4314cc68c1f3
网友评论