001.package com.myapp;
002.
003.import java.io.BufferedInputStream;
004.import java.io.FileOutputStream;
005.import java.io.InputStream;
006.import java.io.OutputStream;
007.import java.net.URL;
008.import java.net.URLConnection;
009.
010.import android.os.AsyncTask;
011.import android.os.Bundle;
012.import android.app.Activity;
013.import android.app.Dialog;
014.import android.app.ProgressDialog;
015.import android.util.Log;
016.import android.view.View;
017.import android.view.View.OnClickListener;
018.import android.widget.Button;
019.import android.widget.EditText;
020.
021.public class MainActivity extends Activity {
022.
023. public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
024. private Button startBtn;
025. private ProgressDialog mProgressDialog;
026. private String URLDownload;
027. private EditText txtURL;
028.
029.
030. @Override
031. public void onCreate(Bundle savedInstanceState) {
032. super.onCreate(savedInstanceState);
033. setContentView(R.layout.activity_main);
034.
035.
036. startBtn = (Button)findViewById(R.id.button1);
037. startBtn.setOnClickListener(new OnClickListener(){
038. public void onClick(View v) {
039. startDownload();
040. }
041. });
042. }
043.
044. private void startDownload() {
045.
046. txtURL = (EditText)findViewById(R.id.editText1);
047. URLDownload = txtURL.getText().toString();
048. new DownloadFileAsync().execute(URLDownload);
049. }
050. @Override
051. protected Dialog onCreateDialog(int id) {
052. switch (id) {
053. case DIALOG_DOWNLOAD_PROGRESS:
054. mProgressDialog = new ProgressDialog(this);
055. mProgressDialog.setMessage("Downloading file..");
056. mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
057. mProgressDialog.setCancelable(false);
058. mProgressDialog.show();
059. return mProgressDialog;
060. default:
061. return null;
062. }
063. }
064.
065.class DownloadFileAsync extends AsyncTask<String, String, String> {
066.
067. @Override
068. protected void onPreExecute() {
069. super.onPreExecute();
070. showDialog(DIALOG_DOWNLOAD_PROGRESS);
071. }
072.
073. @Override
074. protected String doInBackground(String... aurl) {
075. int count;
076.
077. try {
078.
079. URL url = new URL(aurl[0]);
080. URLConnection conexion = url.openConnection();
081. conexion.connect();
082.
083. int lenghtOfFile = conexion.getContentLength();
084. Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
085.
086. InputStream input = new BufferedInputStream(url.openStream());
087.
088.
089. String fileName = URLDownload.substring( URLDownload.lastIndexOf('/')+1, URLDownload.length() );
090.
091. OutputStream output = new FileOutputStream("/sdcard/MyData/"+fileName);
092.
093. byte data[] = new byte[1024];
094.
095. long total = 0;
096.
097. while ((count = input.read(data)) != -1) {
098. total += count;
099. publishProgress(""+(int)((total*100)/lenghtOfFile));
100. output.write(data, 0, count);
101. }
102.
103. output.flush();
104. output.close();
105. input.close();
106. } catch (Exception e) {}
107. return null;
108.
109. }
110. protected void onProgressUpdate(String... progress) {
111. Log.d("ANDRO_ASYNC",progress[0]);
112. mProgressDialog.setProgress(Integer.parseInt(progress[0]));
113. }
114.
115. @Override
116. protected void onPostExecute(String unused) {
117. dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
118. }
119.}
120.}
ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน 
