我已经实现了文件共享项目。我能够发送和接收文件，但想要添加进度条或进度对话，但我不知道在哪里添加进度条。
接收者活动
string WrapText(string statement, int Length)
{
StringBuilder completedWord = new StringBuilder();
completedWord.Append(statement.Substring(0, Length));//cut the specifed legth from long string
completedWord.AppendLine();
completedWord.Append(statement.Substring(Length));//read remainig letters
return completedWord.ToString();
}
接收者线程
public class ReceiverActivity extends AppCompatActivity {
FileReceiver fileReceiver;
ImageButton ibt;
private final Handler mHandler = new Handler(Looper.getMainLooper()) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
/* case FileReceiver.CODE :
tvCode.setText((int)msg.obj + "");
break;
*/
case FileReceiver.LISTENING :
Toast.makeText(ReceiverActivity.this,"Listening...",Toast.LENGTH_SHORT).show();
break;
case FileReceiver.CONNECTED:
Toast.makeText(ReceiverActivity.this,"Connected!",Toast.LENGTH_SHORT).show();
break;
case FileReceiver.RECEIVING_FILE :
Toast.makeText(ReceiverActivity.this,"Receiving File!",Toast.LENGTH_SHORT).show();
break;
case FileReceiver.FILE_RECEIVED :
File file = (File) msg.obj;
Toast.makeText(ReceiverActivity.this,file.getName() + " Received!",Toast.LENGTH_SHORT).show();
Toast.makeText(ReceiverActivity.this,"Stored in " + file.getAbsolutePath(),Toast.LENGTH_SHORT).show();
fileReceiver.close();
break;
case FileReceiver.RECEIVE_ERROR :
Toast.makeText(ReceiverActivity.this,"Error occured : " + (String)msg.obj,Toast.LENGTH_SHORT).show();
fileReceiver.close();
break;
}
}
};
public void getFile(View view) {
fileReceiver = new FileReceiver(this,mHandler);
fileReceiver.getFile();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_receiver);
ibt= (ImageButton) findViewById(R.id.imgbtn);
ibt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(ReceiverActivity.this, Selection_Activity.class);
startActivity(i);
}
});
}
}
接收服务
public class ReceiverThread extends Thread {
private int port;
private Messenger messenger;
private ServerSocket listenerSocket;
private Socket communicationSocket;
private int PKT_SIZE = 60*1024;
ProgressDialog dialog;
public ReceiverThread(int port,Messenger messenger){
//
this.port = port;
this.messenger = messenger;
File folder = new File(Environment.getExternalStorageDirectory() + "/FileSharer/");
folder.mkdirs();
}
@Override
public void run() {
Message message;
try {
listenerSocket = new ServerSocket(port);
message = Message.obtain();
message.what = FileReceiver.CODE;
message.obj = port;
messenger.send(message);
message = Message.obtain();
message.what = FileReceiver.LISTENING;
message.obj = "";
messenger.send(message);
communicationSocket = listenerSocket.accept();
message = Message.obtain();
message.what = FileReceiver.CONNECTED;
message.obj = "";
messenger.send(message);
DataInputStream in = new DataInputStream(communicationSocket.getInputStream());
message = Message.obtain();
message.what = FileReceiver.RECEIVING_FILE;
message.obj = "";
messenger.send(message);
// Read File Name and create Output Stream
String fileName = in.readUTF();
File receiveFile = new File(Environment.getExternalStorageDirectory() + "/FileSharer/" + fileName);
DataOutputStream dout = new DataOutputStream(new FileOutputStream(receiveFile,true));
// Read File Size
long fileSize = in.readLong();
int totalLength = 0;
int length = 0;
byte[] receiveData = new byte[PKT_SIZE];
long startTime = System.currentTimeMillis();
// Get the file data
while( fileSize>0 && ( ( length = in.read( receiveData,0,(int) Math.min(receiveData.length,fileSize) ))!= -1) )
{
dout.write(receiveData, 0, length);
totalLength += length;
fileSize -= length;
}
long stopTime = System.currentTimeMillis();
dout.close();
double time = (stopTime - startTime) / 1000.0;
double speed = (totalLength / time) / 1048576.0;
message = Message.obtain();
message.what = FileReceiver.FILE_RECEIVED;
message.obj = receiveFile;
messenger.send(message);
} catch (Exception e){
e.printStackTrace();
message = Message.obtain();
message.what = FileReceiver.RECEIVE_ERROR;
message.obj = e.toString();
try {
messenger.send(message);
} catch (RemoteException re) {
Log.e("ReceiverThread","Error in sending an error message! Error : " + re.toString());
re.printStackTrace();
}
} finally {
try {
if(communicationSocket!=null)
communicationSocket.close();
if(listenerSocket!=null)
listenerSocket.close();
} catch (IOException ioe) {
Log.e("ReceiverThread","Error in closing sockets. Error : " + ioe.toString());
ioe.printStackTrace();
}
}
}
}
文件接收器
public class ReceiverService extends Service {
private final String PORT = "PORT";
private final String MESSENGER = "MESSENGER";
private int port;
private Messenger messenger;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Bundle b = intent.getExtras();
port = (int) b.get(PORT);
messenger = (Messenger) b.get(MESSENGER);
ReceiverThread receiverThread = new ReceiverThread(port,messenger);
receiverThread.start();
return START_REDELIVER_INTENT;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
答案 0 :(得分：0)
您可以在活动中添加一个简单的ProgressDialog框。
类似的东西：
// global variable
ProgressDialog mProgressDialog;
...
...
// inside onCreate
mProgressDialog = new ProgressDialog(ReceiveActivity.this);
mProgressDialog.setCancelable(true);
mProgressDialog.setMessage("Downloading file ..");
...
...
// before file downloads
mProgressDialog.show();
...
...
// when file is downloaded
mProgressDialog.dismiss();
修改：
如果出现问题，可以这样做：
// assuming mProgressDialog is already initialised and configured.
case FileReceiver.CONNECTED:
Toast.makeText(ReceiverActivity.this,"Connected!",Toast.LENGTH_SHORT).show();
/******** Show the dialog box *********/
mProgressDialog.show(); // make sure that the file receiving starts immediately
// after the receiver is connected and that it do not
// require any action (like button click) after is connected
break;
case FileReceiver.RECEIVING_FILE :
Toast.makeText(ReceiverActivity.this,"Receiving File!",Toast.LENGTH_SHORT).show();
/******** Dismiss the dialog box *********/
mProgressDialog.dismiss();
break;
case FileReceiver.FILE_RECEIVED :
File file = (File) msg.obj;
Toast.makeText(ReceiverActivity.this,file.getName() + " Received!",Toast.LENGTH_SHORT).show();
Toast.makeText(ReceiverActivity.this,"Stored in " + file.getAbsolutePath(),Toast.LENGTH_SHORT).show();
fileReceiver.close();
/******** Dismiss the dialog box *********/
mProgressDialog.dismiss();
break;
您还可以拥有一个包含进度百分比的对话框。请查看ProgressDialog文档。
setProgressStyle(int style)等方法的值类似STYLE_HORIZONTAL。然后有incrementProgressBy(int diff)可以用来获得横条。