重新发布此内容，因为我在上一篇文章中使用了错误的标题，但并未在任何地方结束。
这个聊天窗口项目出现问题时，只有在调用ChatWindow活动时才会崩溃。
在单击服务器场的调试器中，我在窗口中看到此消息：
@FastNative
static native Class<?> classForName(String className, boolean shouldInitialize,
ClassLoader classLoader) throws ClassNotFoundException;
我还在“变量”窗口中看到以下消息：
Exception = {ClassNotFoundException@3804}
以下是ChatWindow代码（不断崩溃的活动）：
public class ChatWindow extends AppCompatActivity {
ListView myDisplay;
EditText myChat;
Button mySend;
ArrayList<String> myList;
ChatAdapter messageAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_window);
//declarations
myDisplay = (ListView) findViewById(R.id.display);
myChat = (EditText) findViewById(R.id.chat);
mySend = (Button) findViewById(R.id.sndBtn);
myList = new ArrayList<>();
//in this case, “this” is the ChatWindow, which is-A Context object
messageAdapter =new ChatAdapter( this );
myDisplay.setAdapter (messageAdapter);
//send button actions
mySend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String message;
message = myChat.getText().toString();
myList.add(message);
messageAdapter.notifyDataSetChanged(); //this restarts the process of getCount()/getView()
myChat.setText("");
}
});
}
private class ChatAdapter extends ArrayAdapter<String> {
public ChatAdapter(Context ctx) {
super(ctx, 0);
}
@Override
public int getCount() {
return myList.size();
}
@Override
public String getItem(int position) {
return myList.get(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = ChatWindow.this.getLayoutInflater();
View result = null ;
if(position%2 == 0)
result = inflater.inflate(R.layout.chat_row_incoming, null);
else
result = inflater.inflate(R.layout.chat_row_outgoing, null);
TextView message = (TextView)result.findViewById(R.id.message_text);
message.setText( getItem(position) ); // get the string at position
return result;
}
}
}
