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我正在创建一个应用程序,它从网络服务器下载一个apk文件然后安装它,但我遇到了问题,点击下载时,进度酒吧比较,但它并没有改变,并在Android显示器比较这一点: 正在下载一个apk,没有这样的文件或目录错误..
我正在使用android 7.1.1 avd,我要尝试与棉花糖。 这是代码:
try {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String sdPath = Environment.getExternalStorageDirectory() + "/";
mSavePath = sdPath + "updateDownload";
File dir = new File(mSavePath);
if (!dir.exists())
if (dir.mkdir())
Log.d(TAG, "mkdir success");
else
Log.d(TAG, "mkdir failed!");
HttpURLConnection conn = (HttpURLConnection) new URL(path).openConnection();
conn.connect();
InputStream is = conn.getInputStream();
int length = conn.getContentLength();
File apkFile = new File(mSavePath, version_name);
FileOutputStream fos = new FileOutputStream(apkFile);
int count = 0;
byte[] buffer = new byte[1024];
while (!isCancel) {
int numread = is.read(buffer);
count += numread;
mProgress = (int) ((float) (count/length) * 100);
mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);
if (numread < 0) {
mUpdateProgressHandler.sendEmptyMessage(DOWNDLOAD_FINISHED);
break;
}
fos.write(buffer, 0, numread);
}
fos.close();
is.close();
} else {
Log.d(TAG, " Media not mounted");
}
} catch (Exception e) {
e.printStackTrace();
}
您可以检查是否 “updateDownload” 目录存在吗? – ApriOri
不,它不存在.. –
有你去..你应该创建它,如果它不存在:) – ApriOri