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例子sdk路径C:\Users\TANG\AppData\Local\Android\Sdk\platforms\android-30\data\res\valuesattrs.xml 中参考属性 同时在as中增加同名xml<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="godvAtt"> <attr name="gv_ti...

package com.example.godvlean;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Typeface;import android.graphics.drawable.ShapeDrawable;import android.g.

ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mImageView,"translationY", 0,view.getWidth()); objectAnimator.setDuration(3000);// objectAnimator.start(); ObjectAnimator objectAnimator2 = ObjectAnimator.o...

MainActivitypackage com.example.threadlean;import androidx.appcompat.app.AppCompatActivity;import android.content.Context;import android.os.AsyncTask;import android.os.Bundle;import android.view.View;import android.widget.ProgressBar;import an.

例子main.c#include <stdio.h>#include "util.h"int main(){ printf("hello , getNumber() = %d\n",getNumber()); return 0;}util.c#include "util.h"int getNumber(){ return 2;}util.hint getNumber();MakeFile SimpleMakefi...

查看用户列表adb shell pm list users创建新用户adb shell pm create-user [–profileOf USER_ID] [–managed] USER_NAMEadb shell pm create-user 10 godv启动和切换用户adb shell am switch-user USER_IDadb shell am start-user USER_ID安装应用到某个用户下adb install –user USER

String id = "channel_1"; String description = "USB Action"; int importance = NotificationManager.IMPORTANCE_HIGH; NotificationManager mManage = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE); .

private void registeUsbActionReceiver(Context context) { final UsbActionReceiver usbActionReceiver = new UsbActionReceiver(); IntentFilter intentFilter = new IntentFilter(); intentFilter.addDataScheme("file"); intentFilter..

main_activityimport androidx.appcompat.app.AppCompatActivity;import androidx.core.app.NotificationCompat;import android.app.Notification;import android.app.NotificationChannel;import android.app.NotificationManager;import android.app.PendingIntent

BaseActivityimport android.os.Bundle;import android.os.RemoteException;import androidx.appcompat.app.AppCompatActivity;public abstract class BaseActivity<V extends BaseView, P extends BasePresenter<V>> extends AppCompatActivity { pr

1.Model类 用来专门进行数据库操作，文件操作，网络操作等相关import android.content.Context;import android.content.SharedPreferences;public class SpModel { private SharedPreferences.Editor mEdit; //进行注册操作 public boolean register(String name, String pwd, Context..

https://blog.youkuaiyun.com/xiaanming/article/details/9750689#commentBox这个讲的太好了直接看这个吧

android:layout_centerHorizontal：设置该控件是否位于父容器的水平居中位置； android:layout_centerVertical：设置该控件是否位于父容器的垂直居中位置； android:layout_centerInParent：设置该控件是否位于父容器的正中央位置； android:layout_alignParentTop：设置该控件是否位于父容器顶端对齐； android:layout_alignParentBottom：设置该控件是否与父容器底端对齐；

xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <T

本篇在https://blog.youkuaiyun.com/we1less/article/details/107892391上一篇的基础上进行对比权限 <uses-permission android:name="android.permission.INTERNET" />httpandroid:usesCleartextTraffic="true"布局<?xml version="1.0" encoding="utf-8"?><LinearLayou

注意访问网络必须在分线程执行xml布局文件<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="ver

首先开权限<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />但是实际上还需要动态申请权限package com.example.mediaeidaprovierdemo;import android.Manifest;import android.content.ContentResolver;import android.content.ContentValues;i

sp存储专门用来存储一些单一的小数据存储数据的类型 boolean float int long String数据保存的路径/data/data/xxx(packageName)/shared_prefs/xxx.xmlxml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:l

注意 本篇实在sqlite的基础上编写的所以建议首先了解sqlite首先建立两个模块ContentProvider ContentResolverContentProvider 里面需要建立表和建立连接 所以在这里需要建立DBHelp类DBHelp代码如下所示import android.content.Context;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.S...

工程结构图创建DBHelp继承SQLiteOpenHelperimport android.content.Context;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteOpenHelper;public class DBHelper extends SQLiteOpenHelper { public DBHelper(Context context, i.

首先展示代码结构图首先在res里建立raw文件用来存放音频文件 这里注意如果写代码过程中发现raw文件引用不到 就build-clear project 一下编写main-xml文件<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_par

本文针对androidx完成任务 之前文的sdk版本陈旧 首先列举本文的代码结构图将json数据放进本地assent路径下用于读取首先创建实体类用于解析json 这段可以去在线解析网站生成实体类需要注意的一点就是实体类需要实现可序列化接口 由于实体类中成员变量过多这里暂时不粘贴代码public class Godv implements Serializable接下来写整个应用的布局main-xml<?xml version="1.0" encoding="utf-

1.新建远程服务器端继承Service类import android.app.Service;2.在AndroidManifest.xml配置 具体位置参见前篇文action name本质上就是一个字符串没有特殊要求<service android:name=".servicedemo.RemoteService"> <intent-filter> <action android:name="com.e

此选项卡可以配合fragment显示数据 就是之前做的那个main_activity.javapublic class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.act

main-xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">

这里一般和有序的代码全部罗列出来 但本章侧重于关注有序广播的发送与接收内容发送端main-xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"

其实本节与静态结构区别不大首先创造接收类继承BroadcastReceiverpublic class MyR2eceive extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String message = intent.getStringExtra("MESSAGE"); Log.i("godv", "MyR2

首先创造接收类继承BroadcastReceiverimport android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;public class MyR1eceive extends BroadcastReceiver { @Override public void onReceive(Cont

样式图+工程结构图main-xml<?xml version="1.0" encoding="utf-8"?><ListView android:id="@+id/lv_main_show" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_pa.

样式图+工程结构图main-xml<?xml version="1.0" encoding="utf-8"?><ListView android:id="@+id/lv_main_show" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_pa.

main-xml<?xml version="1.0" encoding="utf-8"?><ListView android:id="@+id/lv_main_show" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"><

本篇常用的View如图中所示：xml布局代码<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orient...

本篇常用的View如图中所示：xml布局代码<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="

本篇常用的View如图中所示：xml布局代码<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientati

本篇常用的View如图中所示：xml布局代码<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation=.

注意！这篇是在上一篇的基础上整合的。其他代码参考上一篇文章！数据准备与实体类构建部分实体类public class Godv implements Serializable { private String name; private int age; private String img; public Godv() { } public Godv(String name, int age, String img) { th

首先先将最后的整个模块结构图展示一下：由图片可知建立了四个Fragment用来切换。准备工作首先建立四个Fragment类并继承Fragment（android.support.v4.app.Fragment）视版本而定。再建立四个相对应的Fragment的xml布局。xml布局代码：<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/ap

public class DataUtils { public static final String[] TITLES = {"title1", "title2", "title3", "title4", "title5"}; public static final String[] DETAILS = {"this is title1", "this is title2", "this is title3", "this is title4", "this is title5"};}.

两种方式1.一般启动与带回调启动首先绘制界面<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="v.

1.写入文件需要开启权限权限的写入位置在：AndroidManifest.xml添加权限如下：<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>此时开始写入文件if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//判断是否具有SD卡 String fil..