我尝试将图片从自定义文件夹上传到服务器，但按下上传按钮时应用程序崩溃了。 我用谷歌搜索，但无法找到有关相同要求的适当资源/指针。 使用“multipart”同时发送多个图像。 这是代码：
public class MainActivity extends AppCompatActivity
{
private static final String IMAGE_DIRECTORY = "SyncCam";
private Button btn;
String upLoadServerUri = "http://x.x.x.x/Sync/Sync.php";
/********** File Path *************/
final String uploadFilePath = "/storage/sdcard0/SyncCam/";
final String uploadFileName = "";
int serverResponseCode = 0;
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button) findViewById(R.id.cam_btn);
btn.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
uploadFile("");
}
});
String path = Environment.getExternalStorageDirectory().toString() + IMAGE_DIRECTORY;
File f = new File(path);
File imgPaths[] = f.listFiles();
//Log.d("");
for (int i = 0; i < imgPaths.length; i++)
{
Log.d("Files", "FileName:" + imgPaths[i].getName());
uploadFile(uploadFilePath + "" + imgPaths[i].getName());
}
}
public void uploadFile(String sourceFileUri)
{
String fileName = sourceFileUri;
HttpURLConnection conn;
DataOutputStream dos;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile())
{
Log.e("uploadFile", "Source File not exist :" + uploadFilePath + "" + uploadFileName);
//return 0;
}
else
{
try
{
// open a URL connection to the Servlet
FileInputStream fis = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\"" + fileName + "" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fis.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fis.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
dos.write(buffer, 0, bufferSize);
bytesAvailable = fis.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fis.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
if (serverResponseCode == 200)
{
Toast.makeText(MainActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
}
//close the streams //
fis.close();
dos.flush();
dos.close();
}
catch (MalformedURLException ex)
{
ex.printStackTrace();
Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
}
catch (Exception e)
{
e.printStackTrace();
Toast.makeText(MainActivity.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
Log.e(e.getMessage(), "");
}
//return serverResponseCode;
} // End else block
}
}
以下是相应的PHP代码：
$file_path = "Sync/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path))
{
echo "success";
}
else
{
echo "fail";
}
?>
以上代码是否正确？ 是否需要进行任何更改？
答案 0 :(得分：0)
它正在崩溃，因为你想要在主线程上进行网络调用。尝试使用AsyncTask进行上传。