我想将存储在我的资产文件夹中的图像移动到我的 SD 卡中......
private void copyAssets() {
AssetManager assetManager = getAssets();
String[] files = null;
try {
files = assetManager.list("");
} catch (IOException e) {
Log.e("tag", "Failed to get asset file list.", e);
}
for(String filename : files) {
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(filename);
File outFile = new File(getExternalFilesDir(null), filename);
out = new FileOutputStream(outFile);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch(IOException e) {
Log.e("tag", "Failed to copy asset file: " + filename, e);
}
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}
这是我使用的标准代码,我也在我的清单中进行了更改
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
我还在我的 java 类的 onCreate 方法中调用了上述函数但是我没有在我的管理应用程序中获得“移动到 sd 卡”选项,也没有任何文件被复制。
而是显示错误:07-11 16:59:29.042: E/tag(4997): java.io.FileNotFoundException: images