本例是tcp传输的，还有一个是http传输文件的，github地址如下
https://github.com/liang1075963999/http-chuanwenjian
博客地址如下
http://m.blog.csdn.net/ZJi_Hua/article/details/12587677
本例涉及到的知识点如下
1：在android中打开文件管理器的方法
2：对流和字节之间转换的总结，四个字（流读字阴，蝎字流出）
3：uri转换为绝对路径的方式
在客户端，代码如下：
public class WenJian extends Activity {
private Button shangChuan;
private Socket socket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.wenjian);
quanXianShenQing();
//Log.i("xinxi", "onCreate: "+ Environment.getExternalStorageDirectory());
shangChuan= (Button) findViewById(R.id.shangchuan);
shangChuan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//chuanShuJu(Environment.getExternalStorageDirectory()+"/1.mp3");
Intent intent=new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");//在setType中可以选择不同的文件类型,如video/*,audio/*,file/*等.
intent.addCategory(intent.CATEGORY_OPENABLE);
startActivityForResult(intent, 1);
}
});
}
private void quanXianShenQing() {
if(ContextCompat.checkSelfPermission(WenJian.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(WenJian.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},1);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==1){
//Log.i("xinxi",data.getData().toString());
/* luJingZhuanHuan(data.getData(),getContentResolver());
Log.i("xinxi",luJingZhuanHuan(data.getData(),getContentResolver()));*/
Log.i("xinxi",getFileAbsolutePath(WenJian.this,data.getData()));
chuanShuJu(getFileAbsolutePath(WenJian.this,data.getData()));
//chuanShuJu(data.getData().toString());
}
}
private void chuanShuJu(final String s){
new Thread(new Runnable() {
@Override
public void run() {
try {
try {
socket=new Socket("192.168.43.24",5554);
} catch (IOException e) {
e.printStackTrace();
}
OutputStream outputStream=socket.getOutputStream();
byte[] bytes=new byte[1024];
File file=new File(s);
FileInputStream fileInputStream=new FileInputStream(file);
int length;
while ((length=fileInputStream.read(bytes))!=-1){
outputStream.write(bytes,0,length);
outputStream.flush();
}
outputStream.close();
fileInputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
private String luJingZhuanHuan(Uri uri, ContentResolver contentResolver){//该方法是只能转换图片的uri
String filePath;
String[] fileColumn={MediaStore.MediaColumns.DATA};//
Cursor cursor=contentResolver.query(uri,fileColumn,null,null,null);
cursor.moveToFirst();
int column=cursor.getColumnIndex(fileColumn[0]);
filePath=cursor.getString(column);
cursor.close();
return filePath;
}
public static String getFileAbsolutePath(Activity context, Uri fileUri) {
if (context == null || fileUri == null)
return null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, fileUri)) {
if (isExternalStorageDocument(fileUri)) {
String docId = DocumentsContract.getDocumentId(fileUri);
String[] split = docId.split(":");
String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(fileUri)) {
String id = DocumentsContract.getDocumentId(fileUri);
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(fileUri)) {
String docId = DocumentsContract.getDocumentId(fileUri);
String[] split = docId.split(":");
String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
String selection = MediaStore.Images.Media._ID + "=?";
String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} // MediaStore (and general)
else if ("content".equalsIgnoreCase(fileUri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(fileUri))
return fileUri.getLastPathSegment();
return getDataColumn(context, fileUri, null, null);
}
// File
else if ("file".equalsIgnoreCase(fileUri.getScheme())) {
return fileUri.getPath();
}
return null;
}
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
String[] projection = { MediaStore.Images.Media.DATA };
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
int index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
在服务器端:
public class mainactivity {
private static ServerSocket serverSocket;
public static void main(String[] args) throws Exception {
serverSocket = new ServerSocket(5554);
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Socket socket;
while(true){
try {
if(serverSocket.accept()!=null){
socket=serverSocket.accept();
new BaoCun(socket).start();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}).start();
}
}
class BaoCun extends Thread{
private Socket socket;
public BaoCun(Socket socket) {
this.socket=socket;
}
@Override
public void run() {
try {
OutputStream outputStream=socket.getOutputStream();
InputStream inputStream=socket.getInputStream();
File file=new File("D:\\CSV", ((int) (Math.random() * 100000)) +".csv");
FileOutputStream fileOutputStream=new FileOutputStream(file);
byte[] b1 = new byte[1024];
int length;
while((length=inputStream.read(b1))!=-1){
fileOutputStream.write(b1, 0, length);
}
fileOutputStream.close();
outputStream.close();
System.out.println("csv文件保存成功");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}