Unity读取windows和Android SDcard文件
全部都是路径惹的祸
读取 windows D: 盘下的 test.txt 文件，
编辑器里运行，console上可以查看：
windows上 路径 / 要写成 \\ 写一个也不行,可能会被转义，反正也无法读取内容
string windowsUrl = "file://D:\\test.txt";
WWW w = new WWW(windowsUrl);
yield return w;
if (w.isDone)
{
Debug.Log("读取 D:盘 test文件 ==== "+w.text);
}
Androud相关的各大论坛相关文章很多，但是说的都不太清楚，所以特此记录。
log中 我打印了 Unity里面的路径，Androd上需要注意的也是 路径上的统一：
Android上获取Api提供的路径：
Log.e(TAG, "onCreate: packageName = " + this.getExternalCacheDir());
Log.e(TAG, "onCreate: packageName = " + this.getExternalFilesDir(""));
Log.e(TAG, "onCreate: packageName = " + this.getCacheDir());
Log.e(TAG, "onCreate: packageName = " + this.getPackageName());
Log.e(TAG, "onCreate: packageName = " + Environment.getDataDirectory());
Log.e(TAG, "onCreate: packageName = " + Environment.getDataDirectory().getAbsolutePath());
Log.e(TAG, "onCreate: packageName = " + Environment.getExternalStorageDirectory());
IO方式 加载sdcard上的图片资源
加载的 /storage/emulated/0/ProjectName/Image/avatar/20170523_164417.jpg,
image = this.GetComponentInChildren();
Debug.Log("IO加载用时: image = this.GetComponent ========== " + image);
Debug.Log("IO加载: Application.dataPath " + Application.dataPath );
// Application.dataPath /data/app/com.putao.ptx.core-1/base.apk
Debug.Log("IO加载: Application.persistentDataPath " + Application.persistentDataPath);
// Application.persistentDataPath /storage/emulated/0/Android/data/com.putao.ptx.core/files
Debug.Log("IO加载:GameObject.Find" + GameObject.Find("Canvas/Avator").GetComponent());
// /data/user/0/com.putao.paichallenge/cache/20170524_130527.jpg
// path ======= "/storage/emulated/0/ProjectName/Image/avatar/20170523_164417.jpg"
FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
fileStream.Seek(0, SeekOrigin.Begin);
//创建文件长度缓冲区
byte[] bytes = new byte[fileStream.Length];
//读取文件
fileStream.Read(bytes, 0, (int)fileStream.Length);
//释放文件读取流
fileStream.Close();
fileStream.Dispose();
fileStream = null;
//创建Texture
int width = 300;
int height = 372;
Texture2D texture = new Texture2D(width, height);
texture.LoadImage(bytes);
//创建Sprite
Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width,texture.height), new Vector2(0.5f, 0.5f));
image.sprite = sprite;
log上可以看出来 android上 getExternalFilesDir("") 和 Unity里面的Application.persistentDataPath是一致的
/storage/emulated/0/Android/data/com.putao.ptx.core/files
WWW方式加载本地图片
url= "file://"+ "/storage/emulated/0/ProjectName/Image/avatar/20170523_164417.jpg"
根本不是加"jar:file://"。。。某些博主根本就不试试么，瞎写。
public void LoadByWWW(String path)
{
StartCoroutine(doLoadByWWW(path));
}
IEnumerator doLoadByWWW(String path)
{
string url = "file://" + "/storage/emulated/0/PaiChallenge/Image/avatar/20170523_164417.jpg";
Debug.Log("doLoadByWWW == url ================== " + url);
WWW w = new WWW(url);
yield return w;
if (w.isDone)
{
Sprite sprite = Sprite.Create(w.texture, new Rect(0, 0, w.texture.width, w.texture.height), new Vector2(0.5f, 0.5f));
GameObject.Find("Canvas/Avator").GetComponent().sprite = sprite;
}
还有 就是权限问题的添加 ：Player settings -- Other settings -- write permission的设置 Sdcard。这个是在Unity编辑器里打包的情况。
如果导出到studio 里面的话，可自行修改Manifest文件。
