Android上傳文件到Web服務器，PHP接收文件

Android上傳文件到服務器，通常采用構造http協議的方法，模擬網頁POST方法傳輸文件，服務器端可以采用JavaServlet或者PHP來接收要傳輸的文件。使用JavaServlet來接收文件的方法比較常見，在這裡給大家介紹一個簡單的服務器端使用PHP語言來接收文件的例子。

服務器端代碼比較簡單，接收傳輸過來的文件：

1. <?php
2. $target_path = "./upload/";//接收文件目錄
3. $target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
4. if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
5. echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";
6. } else{
7. echo "There was an error uploading the file, please try again!" . $_FILES['uploadedfile']['error'];
8. }
9. ?>

手機客戶端代碼：

1. package com.figo.uploadfile;
3. import java.io.BufferedReader;
4. import java.io.DataOutputStream;
5. import java.io.FileInputStream;
6. import java.io.InputStream;
7. import java.io.InputStreamReader;
8. import java.net.HttpURLConnection;
9. import java.net.URL;
10. import android.app.Activity;
11. import android.os.Bundle;
12. import android.view.View;
13. import android.widget.Button;
14. import android.widget.TextView;
15. import android.widget.Toast;
17. public class UploadfileActivity extends Activity
18. {
19. // 要上傳的文件路徑，理論上可以傳輸任何文件，實際使用時根據需要處理
20. private String uploadFile = "/sdcard/testimg.jpg";
21. private String srcPath = "/sdcard/testimg.jpg";
22. // 服務器上接收文件的處理頁面，這裡根據需要換成自己的
23. private String actionUrl = "http://10.100.1.208/receive_file.php";
24. private TextView mText1;
25. private TextView mText2;
26. private Button mButton;
28. @Override
29. public void onCreate(Bundle savedInstanceState)
30. {
31. super.onCreate(savedInstanceState);
32. setContentView(R.layout.main);
34. mText1 = (TextView) findViewById(R.id.myText2);
35. mText1.setText("文件路徑：\n" + uploadFile);
36. mText2 = (TextView) findViewById(R.id.myText3);
37. mText2.setText("上傳網址：\n" + actionUrl);
38. /* 設置mButton的onClick事件處理 */
39. mButton = (Button) findViewById(R.id.myButton);
40. mButton.setOnClickListener(new View.OnClickListener()
41. {
42. @Override
43. public void onClick(View v)
44. {
45. uploadFile(actionUrl);
46. }
47. });
48. }
50. /* 上傳文件至Server，uploadUrl：接收文件的處理頁面 */
51. private void uploadFile(String uploadUrl)
52. {
53. String end = "\r\n";
54. String twoHyphens = "--";
55. String boundary = "******";
56. try
57. {
58. URL url = new URL(uploadUrl);
59. HttpURLConnection httpURLConnection = (HttpURLConnection) url
60. .openConnection();
61. // 設置每次傳輸的流大小，可以有效防止手機因為內存不足崩潰
62. // 此方法用於在預先不知道內容長度時啟用沒有進行內部緩沖的 HTTP 請求正文的流。
63. httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K
64. // 允許輸入輸出流
65. httpURLConnection.setDoInput(true);
66. httpURLConnection.setDoOutput(true);
67. httpURLConnection.setUseCaches(false);
68. // 使用POST方法
69. httpURLConnection.setRequestMethod("POST");
70. httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
71. httpURLConnection.setRequestProperty("Charset", "UTF-8");
72. httpURLConnection.setRequestProperty("Content-Type",
73. "multipart/form-data;boundary=" + boundary);
75. DataOutputStream dos = new DataOutputStream(
76. httpURLConnection.getOutputStream());
77. dos.writeBytes(twoHyphens + boundary + end);
78. dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\"; filename=\""
79. + srcPath.substring(srcPath.lastIndexOf("/") + 1)
80. + "\""
81. + end);
82. dos.writeBytes(end);
84. FileInputStream fis = new FileInputStream(srcPath);
85. byte[] buffer = new byte[8192]; // 8k
86. int count = 0;
87. // 讀取文件
88. while ((count = fis.read(buffer)) != -1)
89. {
90. dos.write(buffer, 0, count);
91. }
92. fis.close();
94. dos.writeBytes(end);
95. dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
96. dos.flush();
98. InputStream is = httpURLConnection.getInputStream();
99. InputStreamReader isr = new InputStreamReader(is, "utf-8");
100. BufferedReader br = new BufferedReader(isr);
101. String result = br.readLine();
103. Toast.makeText(this, result, Toast.LENGTH_LONG).show();
104. dos.close();
105. is.close();
107. } catch (Exception e)
108. {
109. e.printStackTrace();
110. setTitle(e.getMessage());
111. }
112. }
113. }

在AndroidManifest.xml文件裡添加網絡訪問權限：

1. <uses-permission android:name="android.permission.INTERNET" /

運行結果：