** 1。我为Android文件共享创建了一个应用程序，但是我的编码有一个错误，搜索对等功能无法正常工作，任何人都可以帮我。请关注我的代码。 包com.example.com.MARK2;
import java.io.BufferedReader; import java.io.BufferedWriter; import
java.io.File; import java.io.FileReader; import java.io.FileWriter;
import java.io.IOException; import java.util.HashMap; import
java.util.Iterator; import java.util.Set;
import android.app.Activity; import android.app.AlertDialog; import
android.content.BroadcastReceiver; import android.content.Context;
import android.content.DialogInterface; import
android.content.Intent; import android.content.IntentFilter; import
android.net.wifi.p2p.WifiP2pConfig; import
android.net.wifi.p2p.WifiP2pDevice; import
android.net.wifi.p2p.WifiP2pManager; import
android.net.wifi.p2p.WifiP2pManager.ActionListener; import
android.net.wifi.p2p.WifiP2pManager.Channel; import
android.net.wifi.p2p.WifiP2pManager.ChannelListener; import
android.os.Bundle; import android.provider.Settings; import
android.util.Log; import android.view.Menu; import
android.view.MenuInflater; import android.view.MenuItem; import
android.view.View; import android.widget.TextView; import
android.widget.Toast;
public class MainActivity extends Activity implements
ChannelListener{
private WifiP2pManager manager;
private Channel channel;
private BroadcastReceiver receiver;
private final IntentFilter intentFilter = new IntentFilter();
private boolean isWifiP2pEnabled = false;
Context CONTEXT=this;
private boolean retryChannel=false;
public final static int BYTESPERCHUNK=100000;
static HashMap<String, String> allFileList= new HashMap<String, String>();
static HashMap<String, Integer> numOfChunks= new HashMap<String, Integer>();
static String fileNeeded=new String();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
File file= new File("/sdcard/raja");
if(!file.exists()) file.mkdirs();
initialization();
fileNeeded=getFileNeeded();
intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
channel = manager.initialize(this, getMainLooper(), null);
receiver = new WiFiDirectBroadcastReceiver(manager, channel, this);
registerReceiver(receiver, intentFilter);
//searchPeer();
}
@Override
public void onResume() {
super.onResume();
registerReceiver(receiver, intentFilter);
}
@Override
public void onPause() {
super.onPause();
unregisterReceiver(receiver);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menuitem, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.exit:
disconnect();
cancelDisconnect();
unregisterReceiver(receiver);
this.finish();
System.exit(0);
return true;
case R.id.folder:
Intent browseFolder= new Intent(this,BrowserFolder.class);
startActivity(browseFolder);
default:
return super.onOptionsItemSelected(item);
}
}
public void setIsWifiP2pEnabled(boolean isWifiP2pEnabled) {
this.isWifiP2pEnabled = isWifiP2pEnabled;
return;
}
public void showMessage(String str){ Toast.makeText(CONTEXT, str,Toast.LENGTH_SHORT).show();
}
public void searchButton(View view){ searchPeer(); return;
}
public void searchPeer(){
if(!isWifiP2pEnabled){
new AlertDialog.Builder(this)
.setIcon(R.drawable.ic_launcher)
.setTitle("WiFi Direct is Disabled!")
.setPositiveButton("Setting", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
}
}).show();
return;
}
/* if(fileNeeded==null){
showMessage("You have ALL files updated. Don't need to transfer anymore.");
return;
}*/ final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager()
.findFragmentById(R.id.devicelist); fragment.onInitiateDiscovery();
fragment.getView().setVisibility(View.VISIBLE);
manager.discoverPeers(channel, new WifiP2pManager.ActionListener()
{
@Override
public void onSuccess() {
//Toast.makeText(CONTEXT, "Searching",Toast.LENGTH_SHORT).show();
return;
}
@Override
public void onFailure(int reasonCode) {
Toast.makeText(CONTEXT, "Search Failed: "+reasonCode,Toast.LENGTH_SHORT).show();
return;
}
});
}
public static String getDeviceStatus(int deviceStatus) {
switch (deviceStatus) {
case WifiP2pDevice.AVAILABLE:
return "Available";
case WifiP2pDevice.INVITED:
return "Invited";
case WifiP2pDevice.CONNECTED:
return "Connected";
case WifiP2pDevice.FAILED:
return "Failed";
case WifiP2pDevice.UNAVAILABLE:
return "Unavailable";
default:
return "Unknown";
}
}
public static int divRoundUp(int n,int s){ return (((n) / (s)) + ((((n) % (s)) > 0) ? 1 : 0));
}
public void updateThisDevice(WifiP2pDevice device) {
TextView view = (TextView)findViewById(R.id.mystatus);
view.setText("My Name: "+device.deviceName+"\nMy Address: "+device.deviceAddress+"\nMy Status:
"+getDeviceStatus(device.status));
return;
}
public void connect(WifiP2pConfig config){ manager.connect(channel, config, new ActionListener() {
@Override
public void onSuccess() {
}
@Override
public void onFailure(int reason) { showMessage("Connect failed: "+reason);
} }); return;
}
public void disconnect(){
final DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
.findFragmentById(R.id.devicedetail);
fragment.blockDetail();
updateRecord();
manager.removeGroup(channel, new ActionListener() {
@Override
public void onFailure(int reasonCode) {
showMessage("Disconnect failed. Reason :" + reasonCode);
}
@Override
public void onSuccess() {
//fragment.getView().setVisibility(View.GONE);
showMessage("Disconnected.");
}
});
return;
}
@Override
public void onChannelDisconnected() {
if (manager != null && !retryChannel) {
Toast.makeText(this, "Channel lost. Trying again", Toast.LENGTH_LONG).show();
retryChannel = true;
manager.initialize(this, getMainLooper(), this);
} else {
Toast.makeText(this,
"Channel is probably lost premanently. Try Disable/Re-Enable P2P.",
Toast.LENGTH_LONG).show();
}
return;
}
public void cancelDisconnect() {
if (manager != null) {
final DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
.findFragmentById(R.id.devicedetail);
if (fragment.device == null
|| fragment.device.status == WifiP2pDevice.CONNECTED) {
disconnect();
} else if (fragment.device.status == WifiP2pDevice.AVAILABLE
|| fragment.device.status == WifiP2pDevice.INVITED) {
manager.cancelConnect(channel, new ActionListener() {
@Override
public void onSuccess() {
showMessage("Aborting connection");
return;
}
@Override
public void onFailure(int reasonCode) {
showMessage("Connect abort request failed. Reason Code: " + reasonCode);
}
});
}
}
return;
}
/*
static HashMap<String, HashMap<String, Boolean>> availableFileChunks= new HashMap<String, HashMap<String,
Boolean>>();
static HashMap<String, HashMap<String, Boolean>> neededFileChunks= new HashMap<String, HashMap<String, Boolean>>();
void initialization(){ File listFile=new File("/sdcard/akalyvan.txt"); File recordFile=new
File("/sdcard/akalyvan2.txt"); try {
BufferedReader inputReader = new BufferedReader(new FileReader(listFile));
String buffer = new String();
while((buffer=inputReader.readLine())!=null){ String [] fileInfo= buffer.split(","); allFileList.put(fileInfo[0],
fileInfo[1]); int
num=divRoundUp(Integer.parseInt(fileInfo[2]),BYTESPERCHUNK);
numOfChunks.put(fileInfo[0],num);
}
inputReader.close();
inputReader=new BufferedReader(new FileReader(recordFile));
while((buffer=inputReader.readLine())!=null){ String [] fileInfo= buffer.split(",");
if((buffer=inputReader.readLine())!=null){
HashMap<String, Boolean> chunkMap= new HashMap<String, Boolean>();
String [] chunkNum= buffer.split(",");
for(int i=0;i<chunkNum.length;i++){ chunkMap.put(chunkNum[i], true);
}
availableFileChunks.put(fileInfo[0], chunkMap); }
}
inputReader.close();
Set<String>files= allFileList.keySet();
Iterator<String> it=files.iterator();
while(it.hasNext()){ buffer=it.next(); if(availableFileChunks.get(buffer)==null){
HashMap<String, Boolean> chunkMap= new HashMap<String, Boolean>();
for(int i=0;i<numOfChunks.get(buffer);i++){ chunkMap.put(new Integer(i).toString(), true);
}
neededFileChunks.put(buffer, chunkMap); }else{
HashMap<String, Boolean> chunkMap=availableFileChunks.get(buffer);
HashMap<String, Boolean> neededChunkMap= new HashMap<String, Boolean>();
for(int i=0;i<numOfChunks.get(buffer);i++){ if(chunkMap.get(new Integer(i).toString())==null){
neededChunkMap.put(new Integer(i).toString(), true); }
}
neededFileChunks.put(buffer, neededChunkMap); }
} } catch (IOException e) {
showMessage("IO Error."); }
}
public static String getFileNeeded(){ String result=new String(); Set<String> files=neededFileChunks.keySet();
if(files.isEmpty()) return null; Iterator<String>
it=files.iterator(); int i=0; while(it.hasNext()){
if(i++!=0) result+=",";
String buffer=it.next();
result+=buffer+",";
HashMap<String, Boolean> neededChunkMap=neededFileChunks.get(buffer);
Set<String> chunks=neededChunkMap.keySet();
Iterator<String> chunkit=chunks.iterator();
int j=0;
while(chunkit.hasNext()){ if(j++!=0) result+="+"; result+=chunkit.next();
} } return result;
}
public void updateRecord(){ File recordFile=new File("/sdcard/akalyvan2.txt"); try {
BufferedWriter outputWriter = new BufferedWriter(new FileWriter(recordFile,false));
Set<String>files= availableFileChunks.keySet();
Iterator<String> it=files.iterator();
while(it.hasNext()){ outputWriter.write(it.next()+"\n"); HashMap<String, Boolean>
chunkMap=availableFileChunks.get(it.next()); Set<String> chunks=
chunkMap.keySet(); Iterator<String> chunkit=chunks.iterator();
String chunkList=new String(); int i=0;
while(chunkit.hasNext()){
if(i++!=0) chunkList+=",";
chunkList+=chunkit.next(); } outputWriter.write(chunkList+"\n");
}
outputWriter.flush();
outputWriter.close(); } catch (IOException e) {
showMessage("IO Error."); }
}*/
public static HashMap<String, BitMap> availableChunkMap= new HashMap<String, BitMap>();
public static HashMap<String, BitMap> neededChunkMap= new HashMap<String, BitMap>();
void initialization(){ File listFile=new File("/sdcard/akalyvan3.txt"); File recordFile=new
File("/sdcard/gurubitmaprecord.txt"); try {
if(!listFile.exists()){ showMessage("Fatal Error: Config file not found."); return;
}
BufferedReader inputReader = new BufferedReader(new FileReader(listFile));
String buffer = new String();
while((buffer=inputReader.readLine())!=null){ String [] fileInfo= buffer.split(","); allFileList.put(fileInfo[0],
fileInfo[1]); int
num=divRoundUp(Integer.parseInt(fileInfo[2]),BYTESPERCHUNK);
numOfChunks.put(fileInfo[0],num);
File oneFile= new File("/sdcard/raja/"+fileInfo[1]); if(oneFile.exists()){
BitMap chunkMap= new BitMap(num);
for(int i=0;i<num;i++) chunkMap.Mark(i);
availableChunkMap.put(fileInfo[0], chunkMap); }
}
inputReader.close();
recordFile.createNewFile();
inputReader=new BufferedReader(new FileReader(recordFile));
while((buffer=inputReader.readLine())!=null){ String [] fileInfo= buffer.split(",");
if(availableChunkMap.get(fileInfo[0])!=null){
buffer=inputReader.readLine();
continue; } if((buffer=inputReader.readLine())!=null){
BitMap chunkMap= new BitMap(buffer);
if(chunkMap.length()!=numOfChunks.get(fileInfo[0])){ showMessage("Error: BitMap length not correct"); return;
}
availableChunkMap.put(fileInfo[0], chunkMap); }
}
inputReader.close();
Set<String>files= allFileList.keySet();
Iterator<String> it=files.iterator();
while(it.hasNext()){ buffer=it.next(); if(availableChunkMap.get(buffer)==null){
BitMap chunkMap=new BitMap(numOfChunks.get(buffer));
for(int i=0;i<numOfChunks.get(buffer);i++){ chunkMap.Mark(i);
}
neededChunkMap.put(buffer, chunkMap); }else{
BitMap chunkMap=availableChunkMap.get(buffer);
if(chunkMap.numMarked()==numOfChunks.get(buffer)) continue;
BitMap neededChunk= new BitMap(numOfChunks.get(buffer));
for(int i=0;i<numOfChunks.get(buffer);i++){ if(!chunkMap.Test(i)){
neededChunk.Mark(i); }
}
neededChunkMap.put(buffer, neededChunk); }
} } catch (IOException e) {
showMessage("IO Error: "+e.toString()); }
}
public static String getFileNeeded(){ String result=new String(); Set<String> files=neededChunkMap.keySet();
//if(files.isEmpty()) return null; Iterator<String>
it=files.iterator(); int i=0; while(it.hasNext()){
if(i++!=0) result+=",";
String buffer=it.next();
result+=buffer+",";
result+=neededChunkMap.get(buffer).toString(); } return result;
}
public static void updateRecord(){ File recordFile=new File("/sdcard/gurubitmaprecord.txt"); try {
BufferedWriter outputWriter = new BufferedWriter(new FileWriter(recordFile,false));
Set<String>files= availableChunkMap.keySet();
Iterator<String> it=files.iterator();
while(it.hasNext()){ String buffer=it.next(); outputWriter.write(buffer+","+allFileList.get(buffer)+"\n");
BitMap chunkMap=availableChunkMap.get(buffer);
outputWriter.write(chunkMap.toString()+"\n");
}
outputWriter.flush();
outputWriter.close(); } catch (IOException e) {
Log.d("EE579","IO Error."); }
}
/* public static BloomFilter availableChunks=new BloomFilter();
void initialization(){ File listFile=new File("/sdcard/akalyvan2t.txt"); try {
if(!listFile.exists()){ showMessage("Fatal Error: Config file not found."); return;
}
BufferedReader inputReader = new BufferedReader(new FileReader(listFile));
String buffer = new String();
while((buffer=inputReader.readLine())!=null){ String [] fileInfo= buffer.split(","); allFileList.put(fileInfo[0],
fileInfo[1]); int
num=divRoundUp(Integer.parseInt(fileInfo[2]),BYTESPERCHUNK);
numOfChunks.put(fileInfo[0],num); File oneFile= new
File("/sdcard/raja/"+fileInfo[1]); if(oneFile.exists()){
for(int i=0;i<num;i++){ availableChunks.mark(fileInfo[0]+"-"+i);
} }
}
inputReader.close();
File oneFile= new File("/sdcard/raja/tmp");
if(oneFile.exists()){ File[] files=oneFile.listFiles(); for(int i=0;i<files.length;i++){
String fileName= files[i].getName().split("\\.")[0];
availableChunks.mark(fileName); }
} }catch(IOException e){
showMessage("IO Error: "+e.toString()); }
}
public static String getFileNeeded(){ String result=new String(); Set<String>files= allFileList.keySet(); Iterator<String>
it=files.iterator(); while(it.hasNext()){
String buffer=it.next();
for(int i=0;i<numOfChunks.get(buffer);i++){ if(!availableChunks.test(buffer+"-"+i)){
result+=buffer+"-"+i+","; }
} } return result;
}*/ }**
答案 0 :(得分：1)
您的代码无法读取。所以我在这堂课中找不到错误。可能是你在同行得到更新的广播接收器类中做错了什么。 您可以点击此链接以更好地理解代码。示例应用程序就在那里，查看代码并找到代码中的错误。
How can I transfer files between Android devices using Wi-Fi Direct?
我希望它会对你有所帮助。