我有一个 php 脚本,如果它不存在,它会创建一个文件。php 脚本在创建文件后发送文件。现在我的问题是我的下载类在 php 文件创建新文件时无法下载它(我不知道确切原因)。但是如果 php 脚本发送一个缓存文件,下载就可以了。有没有办法让android等到php脚本执行完毕?
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import org.json.JSONObject;
import android.os.AsyncTask;
import android.os.Environment;
import android.os.Looper;
import android.provider.ContactsContract.Directory;
import android.util.Log;
public class DownloadMP3 extends AsyncTask<String, Integer, String> {
private OnTaskRunning listener;
public DownloadMP3(OnTaskRunning listener){
this.listener=listener;
}
@Override
protected String doInBackground(String... url) {
int count;
try {
Log.d("Info", "create file");
Download down = new Download();
JSONObject jObject = new JSONObject(down.JSON(conf.d + "convert.php?v=" + url[0]));
Log.d("Info","json file: " + jObject.get("fle"));
URL u = new URL(conf.d + "convert.php?v=" + jObject.get("fle"));
Log.d("Info", "dl u");
URLConnection conexion = u.openConnection();
Log.d("Info", "dl op");
conexion.connect();
Log.d("Info", "dl co");
File directory = new File(Environment.getExternalStorageDirectory() + "/Music/VBT Splash/");
Log.d("Info", "dl di");
if (!directory.exists() || !directory.isDirectory()){
directory.mkdirs();
}
InputStream input = new BufferedInputStream(u.openStream());
String filename = conexion.getHeaderField("Content-Disposition");
String file = filename.substring(filename.indexOf("\"")+1, filename.lastIndexOf("\""));
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory() + "/Music/VBT Splash/" + file);
int lenghtOfFile = conexion.getContentLength();
byte data[] = new byte[4096];
long total = 0;
listener.onTaskStarted();
while ((count = input.read(data)) != -1) {
total += count;
output.write(data, 0, count);
publishProgress((int) (total * 100 / lenghtOfFile));
}
Log.d("Info", "dl done");
listener.onTaskDone();
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
protected void onProgressUpdate(Integer... progress) {
listener.onTaskProgress(progress[0]);
}
protected void onPostExecute(int result) {
}
}