在运行应用程序时，我收到错误log.e消息＆＃34;客户端发送错误＆＃34;和
04-01 16:46:58.001: E/ClientActivity(7741): Client Send Error:
04-01 16:46:58.001: W/System.err(7741): java.lang.NullPointerException
04-01 16:46:58.002: W/System.err(7741): atedu.dongthang.controller.AppDelegate$ClientThread.sendMessage(AppDelegate.java:90)
04-01 16:46:58.002: W/System.err(7741): at edu.dongthang.controller.AppDelegate.sendMessage(AppDelegate.java:33)
04-01 16:46:58.002: W/System.err(7741): at edu.dongthang.controller.Controller.sendToAppDel(Controller.java:101)
04-01 16:46:58.002: W/System.err(7741): at edu.dongthang.controller.Controller.onStart(Controller.java:64)
04-01 16:46:58.002: W/System.err(7741): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1136)
04-01 16:46:58.002: W/System.err(7741): at android.app.Activity.performStart(Activity.java:4489)
04-01 16:46:58.003: W/System.err(7741): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2050)
04-01 16:46:58.003: W/System.err(7741): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104)
04-01 16:46:58.003: W/System.err(7741): at android.app.ActivityThread.access$600(ActivityThread.java:134)
04-01 16:46:58.003: W/System.err(7741): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
04-01 16:46:58.003: W/System.err(7741): at android.os.Handler.dispatchMessage(Handler.java:99)
04-01 16:46:58.004: W/System.err(7741): at android.os.Looper.loop(Looper.java:154)
04-01 16:46:58.004: W/System.err(7741): at android.app.ActivityThread.main(ActivityThread.java:4624)
04-01 16:46:58.004: W/System.err(7741): at java.lang.reflect.Method.invokeNative(Native Method)
04-01 16:46:58.004: W/System.err(7741): at java.lang.reflect.Method.invoke(Method.java:511)
04-01 16:46:58.004: W/System.err(7741): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
04-01 16:46:58.005: W/System.err(7741): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
04-01 16:46:58.005: W/System.err(7741): at dalvik.system.NativeStart.main(Native Method)
我认为这是产生错误的代码
package edu.dongthang.controller;
public class AppDelegate extends Application {
public ClientThread client;
public int mouse_sensitivity = 1;
public boolean connected = false;
public boolean network_reachable = true;
public void onCreate(){
super.onCreate();
}
public void createClientThread(String ipAddress, int port){
client = new ClientThread(ipAddress, port);
Thread cThread = new Thread(client);
cThread.start();
}
public void sendMessage(String message){
try {
client.sendMessage(message);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stopServer(){
if(connected){
client.closeSocket();
}
}
// ClientThread Class implementation
public class ClientThread implements Runnable {
public InetAddress serverAddr;
public int serverPort;
private DatagramSocket socket;
byte[] buf = new byte[1000];
public ClientThread(String ip, int port){
try{
serverAddr = InetAddress.getByName(ip);
}
catch (Exception e){
Log.e("ClientActivity", "C: Error", e);
}
serverPort = port;
}
//Opens the socket and output buffer to the remote server
public void run(){
try {
socket = new DatagramSocket();
if(socket != null){
socket.setSoTimeout(3000);
connected = testConnection();
if(connected)
surveyConnection();
}
}
catch (Exception e) {
Log.e("ClientActivity", "Client Connection Error", e);
}
}
public void sendMessage(String message){
try {
buf = message.getBytes();
DatagramPacket out = new DatagramPacket(buf, buf.length, serverAddr, serverPort);
socket.send(out);
network_reachable = true;
}
catch (Exception e){
Log.e("ClientActivity", "Client Send Error:");
if(e.getMessage().equals("Network unreachable")){
Log.e("ClientActivity", "Netork UNREACHABLE!!!!:");
network_reachable = false;
}
closeSocketNoMessge();
}
}
public void closeSocketNoMessge(){
socket.close();
connected = false;
}
public void closeSocket(){
sendMessage(new String("Close"));
socket.close();
connected = false;
}
private boolean testConnection(){
try {
Log.d("Testing", "Sending");
//doi nguoc lai
if(!connected)buf = new String("Connectivity").getBytes();
else buf = new String("connected").getBytes();
DatagramPacket out = new DatagramPacket(buf, buf.length, serverAddr, serverPort);
socket.send(out);
Log.d("Testing", "Sent");
}
catch(Exception e){return false;}
try{
Log.d("Testing", "Receiving");
DatagramPacket in = new DatagramPacket(buf, buf.length);
socket.receive(in);
Log.d("Testing", "Received");
return true;
}
catch(Exception e){return false;}
}
private void surveyConnection(){
int count = 0;
while(connected){
try{Thread.sleep(1000);}
catch(Exception e){}
if(!testConnection())
count++;
else
count = 0;
if(count == 5){
closeSocket();
return;
}
}
}
}
}
04-01 16:49:28.539: V/Resources(8088): Preloading resource #10805c2(res/drawable-hdpi/textfield_search_right_default_holo_light.9.png)
04-01 16:49:28.539: V/Resources(8088): Preloading resource #108057e(res/drawable/tab_indicator_holo.xml)
04-01 16:49:28.548: V/Resources(8088): Preloading resource #108058f(res/drawable-hdpi/tab_unselected_holo.9.png)
04-01 16:49:28.548: V/Resources(8088): Preloading resource #108058a(res/drawable-hdpi/tab_selected_holo.9.png)
04-01 16:49:28.548: V/Resources(8088): Preloading resource #108058e(res/drawable-hdpi/tab_unselected_focused_holo.9.png)
04-01 16:49:28.548: V/Resources(8088): Preloading resource #1080589(res/drawable-hdpi/tab_selected_focused_holo.9.png)
04-01 16:49:28.549: V/Resources(8088): Preloading resource #1080590(res/drawable-hdpi/tab_unselected_pressed_holo.9.png)
04-01 16:49:28.549: V/Resources(8088): Preloading resource #108058b(res/drawable-hdpi/tab_selected_pressed_holo.9.png)
04-01 16:49:28.549: V/Resources(8088): Preloading resource #1080470(res/drawable/quickcontact_badge_overlay_dark.xml)
04-01 16:49:28.555: V/Resources(8088): Preloading resource #1080474(res/drawable-hdpi/quickcontact_badge_overlay_normal_dark.9.png)
04-01 16:49:28.555: V/Resources(8088): Preloading resource #1080476(res/drawable-hdpi/quickcontact_badge_overlay_pressed_dark.9.png)
04-01 16:49:28.555: V/Resources(8088): Preloading resource #1080473(res/drawable/quickcontact_badge_overlay_light.xml)
04-01 16:49:28.560: V/Resources(8088): Preloading resource #1080475(res/drawable-hdpi/quickcontact_badge_overlay_normal_light.9.png)
04-01 16:49:28.560: V/Resources(8088): Preloading resource #1080477(res/drawable-hdpi/quickcontact_badge_overlay_pressed_light.9.png)
在我的forder drawable-hdpi没有那张照片。所以，告诉我，这里有问题!!!
所以，请帮帮我，告诉我哪里错了 非常感谢!!!!
答案 0 :(得分：0)
您是否检查过邮件是否为空？日志似乎指向该变量。