复制文件(影像)的CacheDir到SD卡 [英] Copy file (image) from CacheDir to SD Card
本文介绍了复制文件(影像)的CacheDir到SD卡的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我希望能够以移动或从Android设备的内部缓存中复制文件,并把这个插入SD卡永久存储。这是我到目前为止有:
公共无效onClickSaveSecret(视图v){
文件图像=新的文件(getApplication()getCacheDir()+/image.png。);
文件newImage =新的文件(Environment.getExternalStorageDirectory()+/image.png);
Toast.makeText(这一点,图像保存,100).show();
}
解决方案
/ **
*从源到目标复制文件
*
* @参数src源
* @参数DST目的地
* @throws java.io.IOException异常情况下的任何问题
* /
无效的CopyFile(SRC文件,文件DST)抛出IOException异常{
FileChannel随路=新的FileInputStream(SRC).getChannel();
FileChannel outChannel =新的FileOutputStream(DST).getChannel();
尝试 {
inChannel.transferTo(0,inChannel.size(),outChannel);
} 最后 {
如果(随路!= NULL)
inChannel.close();
如果(outChannel!= NULL)
outChannel.close();
}
}
I want to be able to either move or copy a file from the internal Cache of an android device and put this into permanent storage on the SD Card. This is what I have so far:
public void onClickSaveSecret(View v){
File image = new File(getApplication().getCacheDir() + "/image.png");
File newImage = new File(Environment.getExternalStorageDirectory() + "/image.png");
Toast.makeText(this, "Image Saved", 100).show();
}
解决方案
/**
* copy file from source to destination
*
* @param src source
* @param dst destination
* @throws java.io.IOException in case of any problems
*/
void copyFile(File src, File dst) throws IOException {
FileChannel inChannel = new FileInputStream(src).getChannel();
FileChannel outChannel = new FileOutputStream(dst).getChannel();
try {
inChannel.transferTo(0, inChannel.size(), outChannel);
} finally {
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
}
}
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