问题描述
我的工作与高速公路的WebSocket通信。
在我的应用程序的main.class，我设置为来电连接（），当用户点击一个按钮。
//切换按钮事件
TButton的=（切换按钮）findViewById（R.id.toggleButton1）;
tButton.setOnCheckedChangeListener（新OnCheckedChangeListener（）{ @覆盖
公共无效onCheckedChanged（CompoundButton buttonView，
布尔器isChecked）{ 如果（器isChecked）{ }其他{ } }
}）;
和在这之后，有MyOffers.class，并且如果此类被访问时，
MyOffers_Fragment类会自动四次产生的，因为MyOffers.class包含旋转视图，有四种产品。
在'MyOffers_Fragment类，当用户点击产品的形象之一，应该发送消息。
如果（POS == 0）{
product_photo.setImageResource（R.drawable.myoffers_0）;
product_photo.setOnClickListener（新ImageButton.OnClickListener（）{
公共无效的onClick（视图v）{
字符串ID =Product0;
Log.d（TAG，目前的产品是：+身份证）;
A.sendMessage（ID）;
}
}）;
}
但'mConnection.sendTextMessage（ID1）;'此行令'NullPointerException异常的错误。
有一类Websocket_Connector.class
公共类WebSocket_Connector { 私有静态最后弦乐TAG =ECHOCLIENT;
公众最终WebSocketConnection mConnection =新WebSocketConnection（）; 公共无效连接（最后弦乐wsuri）{ Log.d（TAG，连接到：+ wsuri）; 尝试{
mConnection.connect（wsuri，新WebSocketHandler（）{ @覆盖
公共无效的OnOpen（）{
Log.d（TAG，状态：连接到+ wsuri）;
Log.d（TAG，连接成功\\ n！）;
} @覆盖
公共无效onTextMessage（字符串有效载荷）{
Log.d（TAG，回声得到：+负载）;
} @覆盖
公共无效的OnClose（INT code，弦乐的原因）{
Log.d（TAG，连接关闭。）;
}
}）;
}赶上（WebSocketException E）{ Log.d（TAG，e.toString（））;
} 公共无效的sendMessage（字符串消息）{
连接（WS：//192.168.x.xxx：XXXX）;
mConnection.sendTextMessage（消息）;
} }
我叫主网页类的连接（），之后尝试发送邮件。
但是，这不是你working..Can请帮我吗？
公共类WebSocket_Connector {私有静态最后弦乐TAG =ECHOCLIENT;
公众最终WebSocketConnection mConnection =新WebSocketConnection（）;
私人字符串tmpString =;
公共无效连接（最后弦乐wsuri）{ Log.d（TAG，连接到：+ wsuri）; 尝试{
mConnection.connect（wsuri，新WebSocketHandler（）{ @覆盖
公共无效的OnOpen（）{
Log.d（TAG，状态：连接到+ wsuri）;
Log.d（TAG，连接成功\\ n！）;
mConnection.sendTextMessage（tmpString）;
tmpString =;
} @覆盖
公共无效onTextMessage（字符串有效载荷）{
Log.d（TAG，回声得到：+负载）;
} @覆盖
公共无效的OnClose（INT code，弦乐的原因）{
Log.d（TAG，连接关闭。）;
}
}）;
}赶上（WebSocketException E）{ Log.d（TAG，e.toString（））;
} 公共无效的sendMessage（字符串消息）{ 如果（mConnection.isConnected（））
mConnection.sendTextMessage（消息）;
其他{
tmpString =消息;
连接（WS：//192.168.x.xxx：XXXX）;
} } }
I am working on websocket communication with Autobahn.On the main.class of my app, I set to call 'connect()' when users click a button.
// Toggle Button event
tButton = (ToggleButton) findViewById(R.id.toggleButton1);
tButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if(isChecked){
}else{
}
}
});
And after that, there is MyOffers.class, and if this class is accessed,MyOffers_Fragment class is produced four times automatically, because MyOffers.class contains 'carousel view' and there are four products.
On 'MyOffers_Fragment' class, when users click one of the image of products, message should be sent.
if (pos == 0) {
product_photo.setImageResource(R.drawable.myoffers_0);
product_photo.setOnClickListener(new ImageButton.OnClickListener(){
public void onClick(View v){
String id = "Product0";
Log.d(TAG, "Current product is : " + id);
A.sendMessage(id);
}
});
}
But 'mConnection.sendTextMessage(id1);' this line makes 'NullPointerException' error.There is a class 'Websocket_Connector.class'
public class WebSocket_Connector {
private static final String TAG = "ECHOCLIENT";
public final WebSocketConnection mConnection = new WebSocketConnection();
public void connect(final String wsuri) {
Log.d(TAG, "Connecting to: " + wsuri);
try {
mConnection.connect(wsuri, new WebSocketHandler() {
@Override
public void onOpen() {
Log.d(TAG, "Status: Connected to " + wsuri );
Log.d(TAG, "Connection successful!\n");
}
@Override
public void onTextMessage(String payload) {
Log.d(TAG, "Got echo: " + payload);
}
@Override
public void onClose(int code, String reason) {
Log.d(TAG, "Connection closed.");
}
});
} catch (WebSocketException e) {
Log.d(TAG, e.toString());
}
public void sendMessage(String message) {
connect("ws://192.168.x.xxx:xxxx");
mConnection.sendTextMessage(message);
}
}
I called 'connect()' in the main page class, and after that try to send message.But, it's not working..Can you please help me out?
public class WebSocket_Connector {
private static final String TAG = "ECHOCLIENT";
public final WebSocketConnection mConnection = new WebSocketConnection();
private String tmpString = "";
public void connect(final String wsuri) {
Log.d(TAG, "Connecting to: " + wsuri);
try {
mConnection.connect(wsuri, new WebSocketHandler() {
@Override
public void onOpen() {
Log.d(TAG, "Status: Connected to " + wsuri );
Log.d(TAG, "Connection successful!\n");
mConnection.sendTextMessage(tmpString);
tmpString = "";
}
@Override
public void onTextMessage(String payload) {
Log.d(TAG, "Got echo: " + payload);
}
@Override
public void onClose(int code, String reason) {
Log.d(TAG, "Connection closed.");
}
});
} catch (WebSocketException e) {
Log.d(TAG, e.toString());
}
public void sendMessage(String message) {
if (mConnection.isConnected())
mConnection.sendTextMessage(message);
else {
tmpString = message;
connect("ws://192.168.x.xxx:xxxx");
}
}
}
这篇关于Android的 - 高速公路的WebSocket发送消息错误（NullPointerException异常）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！