Unity3D研究院之Android同步方法读取streamingAssets（八十八）

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

	public SpriteRenderer spriteRenderer;
	void Start () {

		// /data/app/com.xxx.xxx-1.apk!assets/yusong.unity3d
		string path = Application.dataPath+"!assets/yusong.unity3d";


		AssetBundle assetbundle = AssetBundle.LoadFromFile(path);

		Sprite sprite = assetbundle.LoadAsset<Sprite>("0");

		spriteRenderer.sprite =sprite; 
	}

}

	[MenuItem ("Assets/Build AssetBundles")]
	static void BuildAllAssetBundles ()
	{
		BuildPipeline.BuildAssetBundles ("Assets/StreamingAssets",BuildAssetBundleOptions.ChunkBasedCompression,BuildTarget.Android);

		AssetDatabase.SaveAssets ();
		AssetDatabase.Refresh();
	}

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

	public SpriteRenderer spriteRenderer;
	void Start () {
//注释掉的代码是 unity自己的同步方式， 但是在Android上不行， 可是在IOS上可以
//		AssetBundle assetbundle = 	AssetBundle.LoadFromFile(Application.streamingAssetsPath +"/yusong.unity3d");
//
//		Sprite sprite = assetbundle.LoadAsset<Sprite>("0");
//
//		spriteRenderer.sprite =sprite; 


		//以下代码通过JAVA代码来同步读取并且返回给unity
		AndroidJavaClass 	m_AndroidJavaClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
		AndroidJavaObject	m_AndroidJavaObject  = null;
		if (m_AndroidJavaClass != null) {
			m_AndroidJavaObject = m_AndroidJavaClass.GetStatic<AndroidJavaObject>("currentActivity");
		}
			
		byte[] s = 	m_AndroidJavaObject.Call<byte[]>("LoadAB","yusong.unity3d");
		AssetBundle assetbundle = 	AssetBundle.LoadFromMemory(s);

		Sprite sprite = assetbundle.LoadAsset<Sprite>("0");
		spriteRenderer.sprite =sprite; 

	}

}

package com.yusong.momo;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.unity3d.player.*;

import android.app.Activity;
import android.content.res.AssetManager;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class UnityPlayerActivity extends Activity
{
	protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code

	
	protected AssetManager assetManager;
	
	// Setup activity layout
	@Override protected void onCreate (Bundle savedInstanceState)
	{
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		super.onCreate(savedInstanceState);

		getWindow().setFormat(PixelFormat.RGBX_8888); // <--- This makes xperia play happy

		mUnityPlayer = new UnityPlayer(this);
		setContentView(mUnityPlayer);
		mUnityPlayer.requestFocus();
		
		assetManager = getAssets();
	
		
	}


	private byte[] readtextbytes(InputStream inputStream) 
	{

	  ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
//长度这里暂时先写成1024
	  byte buf[] = new byte [1024];

	  int len;

	  try {

	   while ((len = inputStream.read(buf)) != -1) {

	    outputStream.write(buf, 0, len);

	   }

	   outputStream.close();

	   inputStream.close();

	  } catch (IOException e) {

	  }
	  return outputStream.toByteArray();
	}
	
	

	
	//读取assetbund并且返回字节数组
	public byte[] LoadAB(String path)
	{
	
		 InputStream inputStream = null ;
		 
		  try {

			   inputStream = assetManager.open(path);

			  } catch (IOException e) {

			   Log.v ("unity", e.getMessage());

			  }

		  return readtextbytes(inputStream);
	}
	
	
	// Quit Unity
	@Override protected void onDestroy ()
	{
		mUnityPlayer.quit();
		super.onDestroy();
	}

	// Pause Unity
	@Override protected void onPause()
	{
		super.onPause();
		mUnityPlayer.pause();
	}

	// Resume Unity
	@Override protected void onResume()
	{
		super.onResume();
		mUnityPlayer.resume();
	}

	// This ensures the layout will be correct.
	@Override public void onConfigurationChanged(Configuration newConfig)
	{
		super.onConfigurationChanged(newConfig);
		mUnityPlayer.configurationChanged(newConfig);
	}

	// Notify Unity of the focus change.
	@Override public void onWindowFocusChanged(boolean hasFocus)
	{
		super.onWindowFocusChanged(hasFocus);
		mUnityPlayer.windowFocusChanged(hasFocus);
	}

	// For some reason the multiple keyevent type is not supported by the ndk.
	// Force event injection by overriding dispatchKeyEvent().
	@Override public boolean dispatchKeyEvent(KeyEvent event)
	{
		if (event.getAction() == KeyEvent.ACTION_MULTIPLE)
			return mUnityPlayer.injectEvent(event);
		return super.dispatchKeyEvent(event);
	}

	// Pass any events not handled by (unfocused) views straight to UnityPlayer
	@Override public boolean onKeyUp(int keyCode, KeyEvent event)     { return mUnityPlayer.injectEvent(event); }
	@Override public boolean onKeyDown(int keyCode, KeyEvent event)   { return mUnityPlayer.injectEvent(event); }
	@Override public boolean onTouchEvent(MotionEvent event)          { return mUnityPlayer.injectEvent(event); }
	/*API12*/ public boolean onGenericMotionEvent(MotionEvent event)  { return mUnityPlayer.injectEvent(event); }
}