android下载指定文件并打开

}
String tempSb = sb.toString();
tempSb = tempSb.replace(" ", "%");
tempSb = "%" + tempSb.substring(0, stIndexOf("%"));
if (conn.getResponseCode() >= 400) {
Toast.makeText(AutoDownloadSetupAPK.this, "连接超时", Toast.LENGTH_SHORT)
.show();
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.packageБайду номын сангаасarchive");
startActivity(intent);
}
public String chineseToHexString(String str) {
String urls = "http://192.168.1.33:8080/w/a.apk";
String tempFileType = urls.substring(stIndexOf("."), urls.length());
String tempFileName = urls.substring(stIndexOf("/") + 1,
final String fileName = chineseToHexString(fileNames) + fileType;
File tmpFile = new File("/sdcard/");
if (!tmpFile.exists()) {
openFile(file);
调用了下面方法：
protected File downLoadFile(String httpUrl, String fileNames, String fileType) {
// final String fileName = "spring.mp3";
stIndexOf("."));
String tempUrl = urls.substring(0, stIndexOf("/") + 1);
File file = downLoadFile(tempUrl, tempFileName, tempFileType);
tmpFile.mkdir();
}
final File file = new File("/sdcard/" + fileName);
try {
URL url = new URL(httpUrl + fileName);
conn.disconnect();
fos.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
byte[] a = str.getBytes();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < a.length; i++) {
sb.append(Integer.toHexString((256 + a[i]) % 256) + " ");
} else {
while (count <= 100) {
if (is != null) {
int numRead = is.read(buf);
Log.e("OpenFile", file.getName());
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
try {
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream is = conn.getInputStream();
if (numRead <= 0) {
break;
} else {
fos.write(buf, 0, numRead);
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
return file;
}
// 打开APK程序代码
private void openFile(File file) {
FileOutputStream fos = new FileOutputStream(file);
byte[] buf = new byte[256];
conn.connect();
double count = 0;
return tempSb;
}
Toast.makeText(getApplicationContext(), str, Toast.LENGTH_LONG).show();
if (str == null || str.length() <= 0) {
return "";
}
} else {
break;
}
}
}