我一直在尝试关注Android聊天应用程序的教程。
我已经完成了使用AppCompatActivity和ActionBarActivity所需的所有配置，但是当我尝试运行我的应用程序时，它将停止工作。
我一直在寻找不同的解决方法并尝试各种解决方案，但似乎仍然无法完成，请帮助我
java 文件：
public class MainActivity extends AppCompatActivity {
static final int SocketServerPORT = 8080;
TextView infoIp, infoPort, chatMsg;
String msgLog = "";
List<ChatClient> userList;
ServerSocket serverSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
infoIp = (TextView) findViewById(R.id.infoip);
infoPort = (TextView) findViewById(R.id.infoport);
chatMsg = (TextView) findViewById(R.id.chatmsg);
infoIp.setText(getIpAddress());
userList = new ArrayList<ChatClient>();
ChatServerThread chatServerThread = new ChatServerThread();
chatServerThread.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (serverSocket != null) {
try {
serverSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private class ChatServerThread extends Thread {
@Override
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SocketServerPORT);
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
infoPort.setText("I'm waiting here: "
+ serverSocket.getLocalPort());
}
});
while (true) {
socket = serverSocket.accept();
ChatClient client = new ChatClient();
userList.add(client);
ConnectThread connectThread = new ConnectThread(client, socket);
connectThread.start();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
private class ConnectThread extends Thread {
Socket socket;
ChatClient connectClient;
String msgToSend = "";
ConnectThread(ChatClient client, Socket socket){
connectClient = client;
this.socket= socket;
client.socket = socket;
client.chatThread = this;
}
@Override
public void run() {
DataInputStream dataInputStream = null;
DataOutputStream dataOutputStream = null;
try {
dataInputStream = new DataInputStream(socket.getInputStream());
dataOutputStream = new DataOutputStream(socket.getOutputStream());
String n = dataInputStream.readUTF();
connectClient.name = n;
msgLog += connectClient.name + " connected@" +
connectClient.socket.getInetAddress() +
":" + connectClient.socket.getPort() + "\n";
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
dataOutputStream.writeUTF("Welcome " + n + "\n");
dataOutputStream.flush();
broadcastMsg(n + " join our chat.\n");
while (true) {
if (dataInputStream.available() > 0) {
String newMsg = dataInputStream.readUTF();
msgLog += n + ": " + newMsg;
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
broadcastMsg(n + ": " + newMsg);
}
if(!msgToSend.equals("")){
dataOutputStream.writeUTF(msgToSend);
dataOutputStream.flush();
msgToSend = "";
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (dataInputStream != null) {
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null) {
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
userList.remove(connectClient);
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this,
connectClient.name + " removed.", Toast.LENGTH_LONG).show();
msgLog += "-- " + connectClient.name + " leaved\n";
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
broadcastMsg("-- " + connectClient.name + " leaved\n");
}
});
}
}
private void sendMsg(String msg){
msgToSend = msg;
}
}
private void broadcastMsg(String msg){
for(int i=0; i<userList.size(); i++){
userList.get(i).chatThread.sendMsg(msg);
msgLog += "- send to " + userList.get(i).name + "\n";
}
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
chatMsg.setText(msgLog);
}
});
}
private String getIpAddress() {
String ip = "";
try {
Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (enumNetworkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = enumNetworkInterfaces
.nextElement();
Enumeration<InetAddress> enumInetAddress = networkInterface
.getInetAddresses();
while (enumInetAddress.hasMoreElements()) {
InetAddress inetAddress = enumInetAddress.nextElement();
if (inetAddress.isSiteLocalAddress()) {
ip += "SiteLocalAddress: "
+ inetAddress.getHostAddress() + "\n";
}
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
ip += "Something Wrong! " + e.toString() + "\n";
}
return ip;
}
class ChatClient {
String name;
Socket socket;
ConnectThread chatThread;
}
XML文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Char Server"
android:textStyle="bold" />
<TextView
android:id="@+id/infoport"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="italic" />
<TextView
android:id="@+id/infoip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="italic" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/chatmsg"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</ScrollView>
</LinearLayout>
我已完成访问权限 清单
<uses-permission android:name="android.permission.INTERNET" />
我也参与了我的gradle
compile 'com.android.support:appcompat-v7:23.0.1'
我的logcat
E / AndroidRuntime：FATAL EXCEPTION：main进程：com.example.l335a04.walao，PID：11814 java.lang.RuntimeException：无法启动活动ComponentInfo {com.example.l335a04.walao / com.example.l335a04。 walao.MainActivity}：java.lang.IllegalStateException：您需要在此活动中使用Theme.AppCompat主题（或后代）。在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2658）的android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2723）android.app.ActivityThread.access $ 900（ActivityThread.java:172）android.app .ActivityThread $ H.handleMessage（ActivityThread.java:1422）位于android.app.A.运行时，android.O.Roper.Mopage（Handler.java:102）在android.app.Looper.loop（Looper.java:145）的android.app.ActivityThread。 main（ActivityThread.java:5832）位于java.lang.reflect.Method.invoke（Native Method）的java.lang.reflect.Method.invoke（Method.java:372）at com.android.internal.os.ZygoteInit $在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1194）中的MethodAndArgsCaller.run（ZygoteInit.java:1399）引发者：java.lang.IllegalStateException：您需要使用Theme.AppCompat主题（或后代） ）这项活动。在Android.support.v7.app.App.DeCompalDelegateImplV7.setContentView的android.support.v7.app.AppCompatDelegateImplV7.createSubDecor（AppCompatDelegateImplV7.java:309）android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor（AppCompatDelegateImplV7.java:278） （AppCompatDelegateImplV7.java:252）位于android.app的com.example.l335a04.walao.MainActivity.onCreate（MainActivity.java:35）的android.support.v7.app.AppCompatActivity.setContentView（AppCompatActivity.java:109）。 Activity.performCreate（Activity.java:6221）位于android.app.AnsTmentation.handleLaunchActivity的android.ap.Instrumentation.callActivityOnCreate（Instrumentation.java:1119）android.ap p.ActivityThread.performLaunchActivity（ActivityThread.java:2611）。 ActivityThread.java:2723）在Android.app.Handler.dispatchMessage（处理程序。）的android.app.ActivityThread.access $ 900（ActivityThread.java:172）android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1422）。 java：102）在android.ap.Looper.loop（Looper.java:145）在android.ap p.ActivityThread.main（ActivityThread.java:5832）位于com.android.internal的java.lang.reflect.Method.invoke（Method.java:372）的java.lang.reflect.Method.invoke（Native Method）中。 os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1399）at com.android.internal.os.ZygoteInit.main（Zygoenter code hereteInit.java:1194）
答案 0 :(得分：1)
来自LogCat：
您需要在此活动中使用Theme.AppCompat主题（或后代）。
我们可以知道您的AppCompatActivity需要Theme.AppCompat在清单中。打开styles.xml并将您的主题更改为：
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar" />
在AndroidManifest.xml：
<activity android:name="MainActivity"
android:theme="@style/AppTheme"
... />