Question

我正在编写套接字客户端应用程序。

App非常示例，Activty启动一个新的套接字线程来连接服务器。 thread recive命令来自服务器并通过setImageDrawable更改ImageView。

布局中只有一个ImageView。 socket线程将使用BufferedReader从服务器获取命令，它的命令行是＆＃34; start＆＃34 ;,套接字线程将向主活动发送消息以执行setImageDrawable。

这是我的问题： PORTRAIT模式下一切都很好。但是在LANDSCAPE模式下运行了。

PORTRAIT模式下的一切都很好。图片中的图片已更改。
当应用按LANDSCAPE模式运行时。主要活动中的imageview.setImageDrawable将无法通过从套接字线程发送的消息起作用，当且仅当＆＃34;新套接字线程“ - ＆gt; ＆＃34;的BufferedReader＆＃34; - ＆GT; ＆＃34;开关等＆＃34;
imageview.setImageDrawable已执行且没有错误，它只是不起作用！

打击布局：

    package com.example.whiletest;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.SocketTimeoutException;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;
import android.widget.TextView;


public class WhileTest extends Activity {

    private ImageView ivTest;
    private TextView tvState;
    private Handler handler = null;
    private String strTemp; 

    private Message message=new Message();



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        /* set app to LANDSCAPE mode  */
        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        setContentView(R.layout.activity_while_test);
        tvState = (TextView) findViewById(R.id.textView1);
        ivTest = (ImageView) findViewById(R.id.imageView1);

        /* Change UI by main activity*/
        handler = new Handler() { 
            public void handleMessage(Message msg) { 
            switch (msg.what) { 
                case 110: 
                    ivTest.setImageDrawable(getResources().getDrawable(R.drawable.btn_camera_recording));
                    ivTest.postInvalidate();
                    System.out.println("OKAYAYHHAHS");
                break;
                case 112:
                    tvState.setText("收到指令  = " + strTemp);
                break;
            } 
            super.handleMessage(msg); 
            } 
            };



        new Thread(){
            @Override

            public void run()
            {
                Socket socketNet;
                  try{

                    socketNet = new Socket("192.168.2.104",3302);       //make connection
                    System.out.println("Connected!!!");

                    BufferedReader bff=new BufferedReader(new InputStreamReader(socketNet.getInputStream()));
                    PrintWriter os=new PrintWriter(socketNet.getOutputStream());

                    while ((strTemp = bff.readLine()) != null){  

                        //got command from server then send message to main activity
                        System.out.println("readLine = " + strTemp);
                        message.what=112;
                        handler.sendMessage(message);

                        if( strTemp.equals("start")){

                            message.what=110; 
                            handler.sendMessage(message);

                        }
                    };

                } catch (SocketTimeoutException aa) {
                    System.out.println("TimeOut");
                }catch (Exception e){   
                    e.printStackTrace();
                }
            }
         }.start();

    }

}

下面是布局

    <RelativeLayout 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: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="com.example.whiletest.WhileTest" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="138dp"
        android:layout_marginTop="163dp"
        android:src="@drawable/ic_launcher" />

</RelativeLayout>

这是server.java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Timer;
import java.util.TimerTask;



public class Server{

    public static void main(String args[]) {

        try{
            ServerSocket server=null;
            try{    
                server=new ServerSocket(3302);
            }catch(Exception e) {
                System.out.println("can not listen to:"+e);
            }

            Socket socket=null;
            try{
                socket=server.accept();
                System.out.println("accepted.");
            }catch(Exception e) {
                System.out.println("Error."+e);
            }

            String line="start";
            BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
            final PrintWriter os=new PrintWriter(socket.getOutputStream());

            Timer timer=new Timer();
            timer.schedule(new TimerTask(){
                public void run() {
                    os.println("start");
                    os.flush();
                    //System.out.println("Command Sended" + String.valueOf(System.currentTimeMillis()));
                }
            } , 1000, 1000);

        }catch(Exception e){
            System.out.println("Error:"+e);
        }

    }
}

我已经为它做了3天。请帮帮我。

Answer 1

尝试在清单文件中，在您所在的活动下添加此行：

android:configChanges="orientation|screenSize"

ImageView.setImageDrawable在LANDSCAPE模式下不起作用

1 个答案: