技术标签: AndroidJavaClass Unable to convert classes into unity中的android编程 unity调用android CommandInvokationFailure: AndroidJNI
目录
4.Unity3D调用Android功能与组件(四)——文字、图片分享到社交平台
JNI(Java Native Interface):java本地开发接口
JNI是一个协议,这个协议用来沟通java代码和外部的本地代码
AndroidJavaClass("全类名") ---new一个Android原生类
//获取当前App的Activity
public static AndroidJavaObject CurrentActive()
{
if (Application.platform == RuntimePlatform.Android)
return new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
else
return null;
}
//获取指定包名的Activity
public static AndroidJavaObject GetActivity(string package_name,string activity_name)
{
return new AndroidJavaClass(package_name).GetStatic<AndroidJavaObject>(activity_name);
}
//2.获取原生类型: android.provider.Settings中的属性,以android_id为例(只要系统有写就可以)
public string GetAndroidID()
{
string android_id = "NONE";
try
{
#if UNITY_ANDROID && !UNITY_EDITOR
AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
//new AndroidJavaClass("全类名") ---new一个Android原生类
AndroidJavaObject currentActivity = up.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject contentResolver = currentActivity.Call<AndroidJavaObject>("getContentResolver");
AndroidJavaClass secure = new AndroidJavaClass("android.provider.Settings$Secure");
//CallStatic 的使用:静态方法获取一个Android原生类型
android_id = secure.CallStatic<string>("getString", contentResolver, "android_id");
#endif
}
catch (System.Exception e)
{
Debug.LogError(e);
}
return android_id;
}
/获取包名
public static string getPackageName()
{
return CurrentActive().Call<string>("getPackageName");
}
// UI线程中运行
public static void RunOnUIThread(AndroidJavaRunnable r)
{
CurrentActive().Call("runOnUiThread", r);
}
//讲解:call<返回值类型>("方法名");
//设置 不自动锁屏
public static void DisableScreenLock()
{
//new AndroidJavaClass("全类名") ---new一个Android原生类
CurrentActive().Call<AndroidJavaObject>("getWindow")
.Call("addFlags",128);
}
//讲解:call("方法名",参数1);
// 获取内置SD卡路径
public static string GetStoragePath()
{
if (Application.platform == RuntimePlatform.Android)
return new AndroidJavaClass("android.os.Environment").CallStatic<AndroidJavaObject>("getExternalStorageDirectory").Call<string>("getPath");
else
return "d:/movie";
}
概念知识或JNI使用可参考:
https://www.cnblogs.com/rocomp/p/4892866.html
public static string GetAndroidAseet(string filePath)
{
string str = "";
try
{
#if UNITY_ANDROID && !UNITY_EDITOR
//取得应用的Activity
var activity = new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
//从Activity取得AssetManager实例
var assetManager = activity.Call<AndroidJavaObject>("getAssets");
//打开文件流
var stream = assetManager.Call<AndroidJavaObject>("open", filePath);
//获取文件长度
var availableBytes = stream.Call<int>("available");
//取得InputStream.read的MethodID
var clsPtr = AndroidJNI.FindClass("java.io.InputStream");
var METHOD_read = AndroidJNIHelper.GetMethodID(clsPtr, "read", "([B)I");
//申请一个Java ByteArray对象句柄
var byteArray = AndroidJNI.NewByteArray(availableBytes);
//调用方法
int readCount = AndroidJNI.CallIntMethod(stream.GetRawObject(), METHOD_read, new[] { new jvalue() { l = byteArray } });
//从Java ByteArray中得到C# byte数组
var bytes = AndroidJNI.FromByteArray(byteArray);
//删除Java ByteArray对象句柄
AndroidJNI.DeleteLocalRef(byteArray);
//关闭文件流
stream.Call("close");
stream.Dispose();
//返回结果
str = System.Text.Encoding.Default.GetString(bytes);
#endif
}
catch (System.Exception e)
{
Debug.LogError(e);
}
return str;
}
CommandInvokationFailure: Unable to convert classes into dex format.
解决方案:jar包重复(一般supportv4会有不同版本的重复,或者被其它jar包所引用)
感谢游戏蛮牛大神(MemoryC)大部分文章只是将简单的整理备忘在这,更多Android功能请访问
附上连接地址:http://www.manew.com/thread-100075-1-1.html
a. AndroidJavaClass对应着Android里面的Java类,而AndroidJavaObject对应着Android里面实例化的对象。
b. 一定要切记C#里的String和Java的String不是一码事,所以调用Android方法时如果需要传字符串为参数时,不能直接给个字符串,应该给个Java里的String,例如 new AndroidJavaObject("java.lang.String","你想传的字符串");
c. 由于AndroidJavaClass对应的是类,所以一般用之来调用对应的类的静态变量(GetStatic<Type>)或者静态方法(CallStatic<Type>("functionName",param1,param2,....));其中的Type为返回类型,注意是Java的返回类型不是C#的,一般整型和布尔型是通用的,其他的如果不清除可以统一写返回类型为AndroidJavaObject,当然没有返回类型的不需要写Type。
d. AndroidJavaObject对应的是实例对象,所以用new方法给其初始化时要注意说明其是哪个类的实例对象。再比如刚才那个例子: AndroidJavaObject javaString=new AndroidJavaObject("java.lang.String","字符串的值");
private void toastText(object str){
#if UNITY_ANDROID
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");;
AndroidJavaClass Toast = new AndroidJavaClass("android.widget.Toast");
AndroidJavaObject context =currentActivity.Call<AndroidJavaObject>("getApplicationContext");
currentActivity.Call("runOnUiThread", new AndroidJavaRunnable(() => {
AndroidJavaObject javaString = new AndroidJavaObject("java.lang.String", str.ToString());
Toast.CallStatic<AndroidJavaObject>("makeText", context, javaString, Toast.GetStatic<int>("LENGTH_SHORT")).Call("show");
}
));
#endif
}
private void toastText(object str){
#if UNITY_ANDROID
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");;
AndroidJavaClass Toast = new AndroidJavaClass("android.widget.Toast");
AndroidJavaObject context =currentActivity.Call<AndroidJavaObject>("getApplicationContext");
currentActivity.Call("runOnUiThread", new AndroidJavaRunnable(() => {
AndroidJavaObject javaString = new AndroidJavaObject("java.lang.String", str.ToString());
Toast.CallStatic<AndroidJavaObject>("makeText", context, javaString, Toast.GetStatic<int>("LENGTH_SHORT")).Call("show");
}
));
#endif
}
注意:
(1) 由于当时写教程用的Unity版本比较低,一些码友遇到Application.bundleIdentifier报错。在.x和Unity2017、Unity2018版本中,该变量Application.identifier,请注意。另外,方法名中的object photoname已改为string photoname,一般情况无任何影响。
(1)、使用该方法拍完照后自动保存到sd卡下的/Android/data/应用签名/photoName.jpg,其中photoName为调用该方法的String类型传入参数,应用签名一般为com.company.product
(2)、上面的注释应该很清楚了,学过Android开发的应该都能看懂这些代码,看不懂的直接用就行。
(3)、跟用混合开发调用摄像头的区别:该方法暂时不能使用startActivityForResult()方法进行回调,略遗憾。如果您有较好的解决方案,
如果需要startActivityForResult()方法进行回调请参考http://www.manew.com/thread-101810-1-1.html
private void takePhoto(string photoname){
#if UNITY_ANDROID
//Init AndroidJavaClass
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");;
AndroidJavaClass Intent = new AndroidJavaClass ("android.content.Intent");
AndroidJavaClass MediaStore=new AndroidJavaClass("android.provider.MediaStore");
AndroidJavaClass Uri = new AndroidJavaClass ("android.net.Uri");
AndroidJavaClass Environment = new AndroidJavaClass ("android.os.Environment");
//获取当前Activity
AndroidJavaObject currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
//相当于Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
AndroidJavaObject intent=new AndroidJavaObject("android.content.Intent",MediaStore.GetStatic<AndroidJavaObject>("ACTION_IMAGE_CAPTURE"));
//获取sd卡路径,相当于String sdPath= Environment.getExternalStorageDirectory().getAbsolutePath();
AndroidJavaObject sdPath=new AndroidJavaObject("java.lang.String",Environment.CallStatic<AndroidJavaObject>("getExternalStorageDirectory").Call<AndroidJavaObject>("getAbsolutePath"));
//将路径转化为java String
AndroidJavaObject img_path=new AndroidJavaObject("java.lang.String","/Android/data/"+Application.bundleIdentifier+"/files/"+photoname+".jpg");
//相当于img_path=sdPath+img_path;
img_path=sdPath.Call<AndroidJavaObject>("concat",img_path);
//相当于File targetImgFile=new File(img_path);
AndroidJavaObject targetImgFile=new AndroidJavaObject("java.io.File",img_path);
//相当于intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(targetImgFile));
intent.Call<AndroidJavaObject> ("putExtra",MediaStore.GetStatic<AndroidJavaObject>("EXTRA_OUTPUT"),Uri.CallStatic<AndroidJavaObject>("fromFile",targetImgFile));
currentActivity.Call ("startActivity",intent);
#endif
}
private void selectPic(object str){
#if UNITY_ANDROID
//Init AndroidJavaClass
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");;
AndroidJavaClass Intent = new AndroidJavaClass ("android.content.Intent");
AndroidJavaClass MediaStore=new AndroidJavaClass("android.provider.MediaStore");
AndroidJavaClass Uri = new AndroidJavaClass ("android.net.Uri");
AndroidJavaClass Environment = new AndroidJavaClass ("android.os.Environment");
//获取当前Activity
AndroidJavaObject currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
//相当于Intent intent=new Intent(MediaStore.ACTION_GET_CONTENT);
AndroidJavaObject intent=new AndroidJavaObject("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_GET_CONTENT"));
//把C#里的字符串"image/*"转化成Java的String
AndroidJavaObject jstr_type=new AndroidJavaObject("java.lang.String","image/*");
//相当于intent.setType("image/*");
intent.Call<AndroidJavaObject> ("setType",jstr_type);
//相当于intent.putExtra("return-data",true);
intent.Call<AndroidJavaObject> ("putExtra",new AndroidJavaObject("java.lang.String","return-data"),true);
currentActivity.Call ("startActivity",intent);
#endif
}
选中图片后无法回调解决方案
#if UNITY_ANDROID
AndroidJavaClass UnityPlayer ;
AndroidJavaClass Intent;
AndroidJavaClass MediaStore;
AndroidJavaClass Uri;
AndroidJavaClass Environment;
AndroidJavaClass Log;
AndroidJavaObject currentActivity;
#endif
private void selectPic(){
#if UNITY_ANDROID
//init AndroidJavaClass
UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");;
Intent = new AndroidJavaClass ("android.content.Intent");
MediaStore=new AndroidJavaClass("android.provider.MediaStore");
Uri = new AndroidJavaClass ("android.net.Uri");
Environment = new AndroidJavaClass ("android.os.Environment");
Log = new AndroidJavaClass ("android.util.Log");
//获取当前Activity
currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
//给当前的activity添加回调监听
UniActivityListener listener=new UniActivityListener();
listener.onActivityResultListener=onActivityResult;
currentActivity.Call("setListener",listener);
//下面开始调用选择图片
AndroidJavaClass Media = new AndroidJavaClass ("android.provider.MediaStore$Images$Media");
AndroidJavaObject intent=new AndroidJavaObject("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_PICK"),Media.GetStatic<AndroidJavaObject>("EXTERNAL_CONTENT_URI"));
intent.Call<AndroidJavaObject>("setDataAndType",Media.GetStatic<AndroidJavaObject>("EXTERNAL_CONTENT_URI"),new AndroidJavaObject("java.lang.String","image/*"));
currentActivity.Call ("startActivityForResult",intent,1);
//执行到这里之后,就等选择完之后自动执行onActivityResult了
#endif
}
#if UNITY_ANDROID
private void onActivityResult(int requestCode, int resultCode, AndroidJavaObject data){
if (resultCode != -1) {
Debug.Log ("resultCode != RESULT_OK");
return;
}
//requestCode就是你调用currentActivity.Call ("startActivityForResult",intent,1);时的最后面那个常数
if (requestCode == 1) {
Debug.Log ("resultCode == RESULT_OK");
AndroidJavaObject uri = data.Call<AndroidJavaObject> ("getData");
AndroidJavaClass VERSION=new AndroidJavaClass("android.os.Build$VERSION");
int version = VERSION.GetStatic<int> ("SDK_INT");
AndroidJavaObject path;
if (version >= 19) {
path = handleImageOnKikKat (uri);
} else {
path=handleImageBeforeKitKat (uri);
}
byte[] pathByte = path.Call<byte[]> ("getBytes");
String pathStr =System.Text.Encoding.Default.GetString(pathByte);
//****让路******
pathStr就是你们想要的选择的图片路径了
//****让路******
}
}
private AndroidJavaObject handleImageOnKikKat(AndroidJavaObject uri){
AndroidJavaClass DocumentsContract = new AndroidJavaClass ("android.provider.DocumentsContract");
AndroidJavaObject imgPath = null;
if (DocumentsContract.CallStatic<bool> ("isDocumentUri", currentActivity, uri)) {
AndroidJavaObject docID = DocumentsContract.CallStatic<AndroidJavaObject>("getDocumentId",uri);
if (uri.Call<AndroidJavaObject> ("getAuthority").Call<bool> ("equals", new AndroidJavaObject ("java.lang.String", "com.android.providers.media.documents"))) {
AndroidJavaObject id = docID.Call<AndroidJavaObject[]> ("split",new AndroidJavaObject ("java.lang.String",":"))[1];
AndroidJavaObject selection = new AndroidJavaObject ("java.lang.String", "_id=").Call<AndroidJavaObject> ("concat",id);
AndroidJavaClass Media = new AndroidJavaClass ("android.provider.MediaStore$Images$Media");
imgPath = getImagePath (Media.GetStatic<AndroidJavaObject>("EXTERNAL_CONTENT_URI"),selection);
}else if((new AndroidJavaObject ("java.lang.String","com.android.providers.downloads.documents")).Call<bool>("equals",uri.Call<AndroidJavaObject>("getAuthority"))){
AndroidJavaClass ContentUris = new AndroidJavaClass ("android.content.ContentUris");
AndroidJavaClass Long = new AndroidJavaClass ("java.lang.Long");
AndroidJavaObject contentUri = ContentUris.CallStatic<AndroidJavaObject> ("withAppendedId",Uri.CallStatic<AndroidJavaObject>("parse",new AndroidJavaObject ("java.lang.String", "content://downloads/public_downloads")),Long.CallStatic<AndroidJavaObject>("valueOf",docID));
imgPath = getImagePath(contentUri,null);
}
}else if((new AndroidJavaObject ("java.lang.String","content")).Call<bool>("equals",uri.Call<AndroidJavaObject>("getScheme"))){
imgPath = getImagePath(uri,null);
}
return imgPath;
}
private AndroidJavaObject handleImageBeforeKitKat(AndroidJavaObject uri){
AndroidJavaObject imagePath = getImagePath(uri,null);
return imagePath;
}
private AndroidJavaObject getImagePath(AndroidJavaObject uri, AndroidJavaObject seletion){
AndroidJavaObject path = null;
AndroidJavaObject cursor =currentActivity.Call<AndroidJavaObject>("getContentResolver").Call<AndroidJavaObject>("query",uri,null,seletion,null,null);
if (cursor != null){
if (cursor.Call<bool>("moveToFirst")) {
AndroidJavaClass Media = new AndroidJavaClass ("android.provider.MediaStore$Images$Media");
path = cursor.Call<AndroidJavaObject>("getString",cursor.Call<int>("getColumnIndex",new AndroidJavaObject("java.lang.String","_data")));//TODO:
}
cursor.Call("close");
}
return path;
}
#endif
UniActivityListener.cs
using UnityEngine;
using System.Collections;
public class UniActivityListener : AndroidJavaProxy {
public delegate void ActivityResultDelegate(int requestCode, int resultCode, AndroidJavaObject data);
public ActivityResultDelegate onActivityResultListener;
public UniActivityListener():base("com.unity3d.player.UnityActivityListener"){
}
public void onActivityResult(int requestCode, int resultCode, AndroidJavaObject data)
{
if (onActivityResultListener != null) {
onActivityResultListener (requestCode, resultCode, data);
}
}
}
实例化AndroidJavaClass那一段代码最好放在 onAwake(){}里面或者onStart(){}里面执行,或者自己写一个函数。不能直接放到类里面。切记!!!
#if UNITY_ANDROID
//定义AndroidJavaClass变量
AndroidJavaClass UnityPlayer;
AndroidJavaClass Intent;
AndroidJavaClass Uri;
AndroidJavaClass Environment;
#endif
#if UNITY_ANDROID
//实例化AndroidJavaClass变量
UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
Intent = new AndroidJavaClass ("android.content.Intent");
Uri = new AndroidJavaClass ("android.net.Uri");
Environment = new AndroidJavaClass ("android.os.Environment");
#endif
//分享文字
private void shareText(string text){
Debug.Log ("share text");
#if UNITY_ANDROID
AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject jstr_type=new AndroidJavaObject("java.lang.String","text/plain");
AndroidJavaObject jstr_content=new AndroidJavaObject("java.lang.String",text.ToString());
AndroidJavaObject intent = new AndroidJavaObject ("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_SEND"));
intent.Call<AndroidJavaObject> ("setType",jstr_type);
intent.Call<AndroidJavaObject> ("putExtra",Intent.GetStatic<AndroidJavaObject>("EXTRA_TEXT"),jstr_content);
currentActivity.Call ("startActivity",intent);
#endif
}
//分享图片,picName包含.jpg或者.png
private void sharePicture(string picName){
Debug.Log ("share picture");
#if UNITY_ANDROID
AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject jstr_type=new AndroidJavaObject("java.lang.String","image/*");
AndroidJavaObject jstr_content=new AndroidJavaObject("java.lang.String",picName.ToString());
AndroidJavaObject sdPath=new AndroidJavaObject("java.lang.String",Environment.CallStatic<AndroidJavaObject>("getExternalStorageDirectory").Call<AndroidJavaObject>("getAbsolutePath"));
AndroidJavaObject img_path=new AndroidJavaObject("java.lang.String","/Android/data/"+Application.bundleIdentifier+"/files/"+picName);//将路径转化为java String
img_path=sdPath.Call<AndroidJavaObject>("concat",img_path);
// Log.CallStatic<int>("v", jstr_content,img_path);
AndroidJavaObject img_file=new AndroidJavaObject("java.io.File",img_path);//等效于File img_file=new File(img_path);
if(img_file.Call<bool>("exists")){
AndroidJavaObject intent = new AndroidJavaObject ("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_SEND"));
intent.Call<AndroidJavaObject> ("setType",jstr_type);
intent.Call<AndroidJavaObject> ("putExtra",Intent.GetStatic<AndroidJavaObject>("EXTRA_TEXT"),jstr_content);
intent.Call<AndroidJavaObject> ("putExtra",Intent.GetStatic<AndroidJavaObject>("EXTRA_STREAM"),Uri.CallStatic<AndroidJavaObject>("fromFile",img_file));
currentActivity.Call ("startActivity",intent);
}else{
Debug.Log("picName.ToString()+" Not Exists");
}
#endif
}
appid为bundleIdentifier的值,一般为“com.公司名.应用名”如果是本应用,可用 Application.bundleIdentifier 来获取。
如果应用正在研发,还没有投放到应用市场上,可用新浪微博的appid即“com.sina.weibo”来测试
//appid为bundleIdentifier的值,如果是本应用,可用 Application.bundleIdentifier 来获取。
//如果应用正在研发,还没有投放到应用市场上,可用新浪微博的appid即“com.sina.weibo”来测试
private void openAPPinMarket(string appid){
#if UNITY_ANDROID
//init AndroidJavaClass
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");;
AndroidJavaClass Intent = new AndroidJavaClass ("android.content.Intent");
AndroidJavaClass Uri = new AndroidJavaClass ("android.net.Uri");
// get currentActivity
AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject jstr_content=new AndroidJavaObject("java.lang.String","market://details?id="+appid);
AndroidJavaObject intent = new AndroidJavaObject ("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_VIEW"),Uri.CallStatic<AndroidJavaObject>("parse",jstr_content));
currentActivity.Call ("startActivity",intent);
#endif
}
使用APKInstall.getInstance().installAPP(path);调用,其中path是apk文件的本地路径,string类型,包含.apk后缀名。
安装时提示“应用解析错误”,请确保路径正确!
而且如果.apk是放在sd卡下的,请在AndroidMenifest.xml添加读写SD卡权限或者在发布应用的时候(Build Settings——>Other Settings)把WritePermission选为External。当然,如果你把.apk放在手机内存则不需要设置,放在/Assets/StreamingAssets/目录下更好
using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
/// <summary>
/// APK install.
/// 使用方法:
/// <1>该脚本不需要继承MonoBehavior;
/// <2>直接用APKInstall.getInstance().installAPP(path);就可以
/// </summary>
public class APKInstall {
private static APKInstall instance;
private AndroidJavaClass UnityPlayer;
private AndroidJavaClass Intent;
private AndroidJavaClass Uri;
private AndroidJavaObject currentActivity;
public static APKInstall GetInstance(){
if (instance == null) {
instance = (APKInstall)Activator.CreateInstance(typeof(APKInstall),true);
instance.initProxy ();
}
return instance;
}
private void initProxy (){
#if UNITY_ANDROID
UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
Intent = new AndroidJavaClass ("android.content.Intent");
Uri = new AndroidJavaClass ("android.net.Uri");
#endif
}
//path为.apk文件的完整路径
public void installAPP(string path){
#if UNITY_ANDROID
currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject intent=new AndroidJavaObject("android.content.Intent",Intent.GetStatic<AndroidJavaObject>("ACTION_VIEW"));
intent.Call<AndroidJavaObject>("setDataAndType",Uri.CallStatic<AndroidJavaObject>("fromFile",new AndroidJavaObject("java.io.File",new AndroidJavaObject("java.lang.String",path))),new AndroidJavaObject("java.lang.String","application/vnd.android.package-archive"));// "application/vnd.android.package-archive"
currentActivity.Call ("startActivity",intent);
#endif
}
}
using UnityEngine;
using System.Collections;
public class WIFIState {
const int WIFI_STATE_DISABLED = 1;
const int WIFI_STATE_ENABLED = 3;
const int WIFI_STATE_DISABLING = 0;
const int WIFI_STATE_ENABLING = 2;
public static string getWIFIState(){
string stateString = "WIFI_STATE_UNKNOWN";
#if UNITY_ANDROID
AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity= UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject wifiManager=currentActivity.Call<AndroidJavaObject>("getSystemService",new AndroidJavaObject("java.lang.String","wifi"));
if(wifiManager != null){
int wifiState = wifiManager.Call<int>("getWifiState");
switch(wifiState){
case WIFI_STATE_DISABLED:
Debug.Log("WIFI:DISABLED");
stateString = "WIFI_STATE_DISABLED";
break;
case WIFI_STATE_DISABLING:
Debug.Log("WIFI:DISABLING");
stateString = "WIFI_STATE_DISABLING";
break;
case WIFI_STATE_ENABLED:
Debug.Log("WIFI:ENABLED");
stateString = "WIFI_STATE_ENABLED";
break;
case WIFI_STATE_ENABLING:
Debug.Log("WIFI:ENABLING");
stateString = "WIFI_STATE_ENABLING";
break;
}
}
#endif
return stateString;
}
}
string pkgName = "com.company.product";
using (AndroidJavaClass jcPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) {
using (AndroidJavaObject joActivity = jcPlayer.GetStatic<AndroidJavaObject>("currentActivity")) {
using (AndroidJavaObject joPackageManager = joActivity.Call<AndroidJavaObject>("getPackageManager")) {
using (AndroidJavaObject joIntent = joPackageManager.Call<AndroidJavaObject>("getLaunchIntentForPackage", pkgName)) {
if (null != joIntent) {
joActivity.Call("startActivity", joIntent);
}
}
}
}
}
}
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文章浏览阅读644次。函数名: modf头文件:函数原型: double modf(double value, double *iptr);功 能: 求双精度数的小数部分参 数: double value 为要操作的双精度数 ,double *iptr 为要传回整数部分的变量指针返回值: 返回value的小数部分程序例: 分别求出双精度number的小数部分和整数部分,并将结果输出#include#includ..._c语言求一个双精度数的整数部分和小数部分
文章浏览阅读288次。最近在学习DDos相关知识,参考一些只是,做了摘要,供自己参考。 参考:http://blog.csdn.net/xlf13872135090/article/details/8059538SYN Flood 攻击原理 利用TCP协议缺陷,发送了大量伪造的TCP连接请求,使得被攻击方资源耗尽,无法及时回应或处理正常的服务请求。一个正常的TCP连接需要三次握手,首先客户端发送一个包含SYN标志的数_http存在synflood吗
文章浏览阅读775次。我们之前学习的都是针对一个表的操作。如果要进行多个表之间的操作,就要用到外键把他们关联起来。外键的作用:能够让多个表进行关联,使表与表之间有联系,实现共性抽取。如果数据项比较多的情况下,把所有数据都存放在一个表中,如果表太大,影响操作效率。解决办法就是把一个表拆分成多个表,并且用外键去关联。例子:如果要设计一个员工表1)员工表:编号、姓名、年龄、性别、所在分公司、所在部门2)部门表:编号、部门名称、部门经理、主要任务3)公司表:编号、分公司名,地址、电话、法人把公司和部门的数据抽取出来,形成_sql查询外键id的数据
文章浏览阅读803次,点赞14次,收藏14次。章节一讲述了OpenGL在渲染的时候需要一个Context来记录了OpenGL渲染需要的所有信息和状态,可以把上下文理解成一个大的结构体,它里面记录了当前绘制使用的颜色、是否有光照计算以及开启的光源等。不同的操作系统,都有各自的上下文创建方法,最简单的上下文可以通过创建。章节二讲述了一个一个轻量级的图形界面框架,GLFW 的是提供了处理手柄、键盘、鼠标输入章节二还创建了一个空项目章节三讲述了GLAD库是用来管理OpenGL的函数指针的,所以在调用任何OpenGL的函数之前我们需要,从而让我们。_opengl窗口颜色
文章浏览阅读1.3k次。目标:使用OpenCV cv::inRange 函数进行基本的 阈值操作, 基于像素值在HSV色度空间的范围进行对象检测理论:前一篇文章中我们学习了如何使用cv::threshold 阈值函数进行阈值操作 本文我们将学习使用 cv::inRange 来进行处理 原理是一样的但是现在我们增加了一个我们所需要的 【像素值的范围】HSV色度空间 HSV colorspaceHSV ..._inrange和cv2.threshold一起使用
文章浏览阅读154次。 瑜伽培训课程层出不穷,但市面上都没有教授瑜伽老师们如何“教”的系统培训。瑜伽行业表面看似繁荣,但大多数老师缺失教学的“灵魂”。 为此,心合瑜伽学院王梓涵院长结合多年来积累的经验以及瑜伽老师的痛点,与心合教学团队不断打磨,开创瑜伽培训先河,首创贴合瑜伽老师的『瑜伽教学法』,教学法正是指导瑜伽老师们如何上课的法门! 不少老师们,有时会有这样的问题: “我把正确的口令讲出来了,但是会员好像不听我的口令,并没有按照口令去做,需要我不停地辅助和做示范才能完成...” 一个优秀的老师,总可以_会员病了无法来上瑜伽课怎么说
文章浏览阅读2.2w次,点赞12次,收藏113次。随机森林概述随机森林是集成学习方法bagging类中的翘楚。与集成学习boosting类的GBDT分庭抗礼。bagging类集成学习采用的方法是:用部分数据 or 部分特征 or 多个算法 训练一些模型;然后再组合这些模型,对于分类问题采用投票多数表决,回归问题采用求平均。各个模型训练之间互不影响,天生就适合并行化处理。在如今大数据时代背景下很有诱惑力。 主要效果:重点关注降低方差,..._随机森林及其调参
文章浏览阅读1.5k次,点赞2次,收藏2次。解决Exception: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z和Error: JAVA_HOME is incorrectly set.Please update D:\Software\hadoop260\conf\hadoop-env.cmd‘-Xmx512m’ 不是内部或外部命令,也不是可运行的程序或批处理文件。这个错误目前我知道的有以下几种解决办法:一、查看hadoop安装是_org.apache.hadoop.io.nativeio.nativeio$windows.access0(ljava/lang/string;i)z
文章浏览阅读2.6k次。我的是linux系统,那么要怎么样才能查看防火墙有没有开启呢?下面由学习啦小编给你做出详细的linux查看防火墙是否开启方法介绍!希望对你有帮助!linux查看防火墙是否开启方法一:service iptables status可以查看到iptables服务的当前状态。但是即使服务运行了,防火墙也不一定起作用,你还得看防火墙规则的设置 iptables -L在此说一下关于启动和关闭防火墙的命令:1..._linux防火墙服务找不到
文章浏览阅读109次。public class useDatrgrivView { string conn = null; string sqlComm = null; DataSet das = null; DataGridView GridView = null; //初始化,绑定 publ..._datrgridview 显示不了数据