Android Plugins For Unity:Android Studio

最近在对接Android平台的SDK，由于工作保密原因，这里做一个Demo进行研发记录！

因为项目要求由Unity进行开发，所以需要将Android的东西做成插件导出给Unity调用，所以参考官方提供的文献：https://docs.unity3d.com/Manual/PluginsForAndroid.html ；

进行了进一步修改！

插件使用 Android Studio2.2 进行开发编写：Android Studio 有个好处，就是可以将res中的资源文件一起打包导出成aar包！

开发流程：

一、首先创建一个空项目：

二、在空工程中新建一个Module(Android Library)：

三、在本地的Unity安装路径中找到classes.jar包：(可以通过搜索查找)

D:\Unity\Editor\Data\PlaybackEngines\androidplayer\Variations\mono\Development\Classes\classes.jar

四、将Unity的classes.jar包拷贝到刚才新建的 Android Library 模块下的 libs 文件夹中 ： AndroidLibrary/libs/classes.jar

五、在AndroidLibrary中的build.gradle文件中添加几句代码，将Unity的classes.jar添加到依赖中，这样才可以正常使用Unity的Java类：

repositories{

    flatDir{

        dirs 'libs'

    }

}

dependencies{

    compile files(libs/classes.jar)

}

六、到这里开始就可以进行正常的Plugins插件编写了：

package com.wjt.plugins.customactivity;

import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Build.VERSION;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.Window;
import android.widget.Toast;
import com.unity3d.player.UnityPlayer;

public class CustomProxyActivity extends Activity
{
  private final String TAG = getPackageName();

  //权限申请码

  private static final int READ_PHONE_STATE_REQUEST_CODE = 1;

  //Android 6.0 需要动态申请某些权限  =====》下列权限还必须在AndroidManifest.xml文件中进行声明

  private static final String[] DANGEROUS_PERMISSION = { "android.permission.READ_PHONE_STATE", "android.permission.READ_EXTERNAL_STORAGE", "android.permission.WRITE_EXTERNAL_STORAGE" };
  protected UnityPlayer mUnityPlayer;

  public void PermissionRequest()
  {
    Log.e(this.TAG, "申请权限！");
    runOnUiThread(new Runnable()
    {
      public void run() {
        if (Build.VERSION.SDK_INT >= 23)
          if ((ActivityCompat.checkSelfPermission(CustomProxyActivity.this, "android.permission.READ_PHONE_STATE") != 0) ||
            (ActivityCompat.checkSelfPermission(CustomProxyActivity.this, "android.permission.READ_EXTERNAL_STORAGE") != 0) ||
            (ActivityCompat.checkSelfPermission(CustomProxyActivity.this, "android.permission.WRITE_EXTERNAL_STORAGE") != 0))
          {

            //申请权限

            ActivityCompat.requestPermissions(CustomProxyActivity.this, CustomProxyActivity.DANGEROUS_PERMISSION, 1);
          }
          else {

            //权限已经授予

            Log.i(CustomProxyActivity.this.TAG, "权限已经授予");
            Toast.makeText(CustomProxyActivity.this.getApplicationContext(), "权限已经授予！", 0).show();
          }
      }
    });
  }

  public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
  {
    if (requestCode == 1) {
      if (grantResults[0] == 0)
      {

        //权限授予成功

        Toast.makeText(getApplicationContext(), "成功获得授权！", 0).show();
        Log.i(this.TAG, "成功获得授权");
      } else {
        Log.i(this.TAG, "未获得授权");

        Toast.makeText(getApplicationContext(), "权限拒绝,准备退出,请处理后事！", 0).show();
      }
    }
    else super.onRequestPermissionsResult(requestCode, permissions, grantResults);
  }

  protected void onActivityResult(int requestCode, int resultCode, Intent data)
  {
    super.onActivityResult(requestCode, resultCode, data);

    Log.i(this.TAG, String.format("请求码 ：%d , 结果码 ：%d , Intent ：%s", new Object[] { Integer.valueOf(requestCode), Integer.valueOf(resultCode), data.getDataString() }));
    Toast.makeText(this, String.format("请求码 ：%d , 结果码 ：%d , Intent ：%s", new Object[] { Integer.valueOf(requestCode), Integer.valueOf(resultCode), data.getDataString() }), 0).show();
  }

  protected void onCreate(Bundle savedInstanceState)
  {
    requestWindowFeature(1);
    super.onCreate(savedInstanceState);
    getWindow().takeSurface(null);
    getWindow().setFormat(2);
    this.mUnityPlayer = new UnityPlayer(this);
    setContentView(this.mUnityPlayer);
    this.mUnityPlayer.requestFocus();
  }

  protected void onDestroy()
  {
    this.mUnityPlayer.quit();
    super.onDestroy();
  }

  protected void onPause()
  {
    super.onPause();
    this.mUnityPlayer.pause();
  }

  protected void onResume()
  {
    super.onResume();
    this.mUnityPlayer.resume();
  }

  public void onConfigurationChanged(Configuration newConfig)
  {
    super.onConfigurationChanged(newConfig);
    this.mUnityPlayer.configurationChanged(newConfig);
  }

  public void onWindowFocusChanged(boolean hasFocus)
  {
    super.onWindowFocusChanged(hasFocus);
    this.mUnityPlayer.windowFocusChanged(hasFocus);
  }

  public boolean dispatchKeyEvent(KeyEvent event)
  {
    if (event.getAction() == 2)
      return this.mUnityPlayer.injectEvent(event);
    return super.dispatchKeyEvent(event);
  }

  public boolean onKeyUp(int keyCode, KeyEvent event)
  {
    return this.mUnityPlayer.injectEvent(event);
  }

  public boolean onKeyDown(int keyCode, KeyEvent event)
  {
    return this.mUnityPlayer.injectEvent(event);
  }

  public boolean onTouchEvent(MotionEvent event)
  {
    return this.mUnityPlayer.injectEvent(event);
  }

  public boolean onGenericMotionEvent(MotionEvent event)
  {
    return this.mUnityPlayer.injectEvent(event);
  }
}

//创建res资源

package com.wjt.plugins.customactivity;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
import com.wjt.plugins.R.id;
import com.wjt.plugins.R.layout;

public class onStartActivity extends Activity
{
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_onstartactivity);
    findViewById(R.id.button).setOnClickListener(new View.OnClickListener()
    {
      public void onClick(View view) {
        Toast.makeText(onStartActivity.this, "onStartActivity is ready start!", 0).show();
      }
    });
  }
}

编写好AndroidPlugins后 Rebuilt Project ，完成后就可以在当前AndroidLibrary模块下的 build文件中找到导出的aar包了：AndroidLibrary\build\outputs\aar\***.aar

七、使用：将导出的*.aar包拷贝到Unity项目中的Assets\Plugins\Android\ 目录下，然后用zip压缩工具打开aar包，将libs\文件夹下的classes.jar包文件删除掉，否则在打包Unity项目的时候会报错！

八、为Unity项目配置AndroidManifest.xml文件：

xmlns:android="http://schemas.android.com/apk/res/android"

package="com.wjt.plugins"

android:installLocation="preferExternal"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

android:versionCode="1"
android:versionName="1.0" >

    android:minSdkVersion="15"
    android:targetSdkVersion="24" />

android:name="android.permission.ACCESS_NETWORK_STATE"/>
android:name="android.permission.INTERNET"/>
android:name="android.permission.READ_PHONE_STATE"/>

android:name="android.permission.GET_TASKS"/>
android:name="android.permission.ACCESS_WIFI_STATE"/>
android:name="android.permission.GET_ACCOUNTS"/>

android:name="android.permission.CALL_PHONE"/>
android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
android:name="android.permission.WRITE_SETTINGS"/>

android:name="android.permission.READ_EXTERNAL_STORAGE"/>
android:name="android.permission.READ_LOGS"/>

    android:smallScreens="true"
    android:normalScreens="true"
    android:largeScreens="true"
    android:xlargeScreens="true"
    android:anyDensity="true"/>

    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true">

android:name="com.wjt.plugins.customactivity.CustomProxyActivity">
    
        android:name="android.intent.action.MAIN"/>

    android:name="android.intent.category.LAUNCHER"/>

    android:name="unityplayer.UnityActivity"
    android:value="true" />

    android:name="unityplayer.ForwardNativeEventsToDalvik"
    android:value="false" />

    android:name="com.wjt.plugins.customactivity.onStartActivity"
    android:screenOrientation="landscape"/>

九、在Unity中进行调用：
随意创建一个C#Script脚本，在Start()方法中添加几行代码进行调动：
        AndroidJavaClass jc = new UnityEngine.AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject activity = jc.GetStatic("currentActivity");
        activity.Call("PermissionRequest");
就这样，即可调用插件里的方法了，并且会有具体的响应。
到此，整个记录完成。。。