问题描述
因此，在Android的/ Java的，我需要访问一个全局变量，它是一个的EditText [] 我创建上面的的onCreate 的内我的活动的方法 onClickListener 。下面是变量：
公共类NCDTC prelayActivity延伸活动{
最终的EditText [] = relayLabelEdits新的EditText [N];
其中， N 是另外一个全局变量整数。
我的问题是，为了访问这些的EditText 内的 onclickListener 我不得不做出最后的访问内在onClickListener，但我需要分配 relayLabelEdits 来一个新的的EditText [] 如果对N的值发生变化，它是惯于做的。
下面是 onClickListener （应用程序的主要部分是打开通过WiFi TCP套接字和控制继电器等等忽略接口的信息以及System.out的。的println点到 relayLabelEdits 返回NULL，除非 relayLabelEdits 变量是决赛）：
按钮保存=新按钮（本）;
save.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
的EditText [] = saveTargets relayLabelEdits;
的System.out.println（直接：+ relayLabelEdits [0]）;
的System.out.println（第一次尝试+ saveTargets [0]）; //创建一个字符串动态创建的数据库名称
串relayToSave; INT myNum的= 0;
尝试{
myNum的=的Integer.parseInt（portEditText.getText（）的toString（））;
}赶上（NumberFormatException的NFE）{
吐司面包= Toast.makeText（getBaseContext（），您输入只能包含数字端口号，Toast.LENGTH_LONG）;
toast.show（）;
返回;
}
的System.out.println（ipAEditText.getText（）的toString（））;
cPanel.saveString（IPA，ipAEditText.getText（）的toString（））;
cPanel.saveInt（端口中，myNum）; 的for（int i = 0; I＆LT; N;我++）{
relayToSave =接力+（I + 1）;
的System.out.println（我在这里）;
的System.out.println（relayLabelEdits [I]）;
cPanel.saveString（relayToSave，relayLabelEdits [I] .getText（）的toString（））;
//cPanel.saveString(relayToSave，它的工作）;
的System.out.println（我在这里）;
} 如果（cPanel.connect（）==真）{
createMainContainer（）;
的setContentView（sView）;
getRelayNames（）;
displayRelayNames（）;
updateButtonText（）;
}
其他{
吐司面包= Toast.makeText（getBaseContext（），无法连接，检查IP地址和端口号，Toast.LENGTH_LONG）;
toast.show（）;
}
}
}）;
所以，我如何可以访问任何想法的EditText [] 中的 onClickListener 没有使它最终
你为什么不使听者类外活动引用传递给它？
So in Android/Java, I need to access a global variable that is an EditText[]that I create above the onCreate method of my activity inside of an onClickListener. Here is the variable:
public class NCDTCPRelayActivity extends Activity {
final EditText[] relayLabelEdits = new EditText[n];
Where n is another global variable integer.
My problem is that in order to access these EditText inside an onclickListener i had to make final to access inside the onClickListener, but I need to assign relayLabelEdits to a new EditText[] if the value of n changes which it is wont to do.
Below is the onClickListener (the main portion of the app is to open a tcp socket and control relays via WiFi so just ignore the socket information and those System.out.println that point to the relayLabelEdits return null unless the relayLabelEdits variable is final):
Button save = new Button(this);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
EditText[] saveTargets = relayLabelEdits;
System.out.println("Direct: " + relayLabelEdits[0]);
System.out.println("first try " + saveTargets[0]);
//Creates string to create the database names on the fly
String relayToSave;
int myNum = 0;
try {
myNum = Integer.parseInt(portEditText.getText().toString());
} catch(NumberFormatException nfe) {
Toast toast = Toast.makeText(getBaseContext(), "The Port Number you entered must only contain numbers", Toast.LENGTH_LONG);
toast.show();
return;
}
System.out.println(ipAEditText.getText().toString());
cPanel.saveString("ipA", ipAEditText.getText().toString());
cPanel.saveInt("port", myNum);
for (int i = 0; i < n; i++) {
relayToSave = "relay" + (i+1);
System.out.println("HERE I AM");
System.out.println(relayLabelEdits[i]);
cPanel.saveString(relayToSave, relayLabelEdits[i].getText().toString());
//cPanel.saveString(relayToSave, "It worked");
System.out.println("HERE I AM");
}
if (cPanel.connect() == true){
createMainContainer();
setContentView(sView);
getRelayNames();
displayRelayNames();
updateButtonText();
}
else {
Toast toast = Toast.makeText(getBaseContext(), "Could Not Connect, check IP address and Port Number", Toast.LENGTH_LONG);
toast.show();
}
}
});
So any ideas on how I can access the EditText[] inside the onClickListener without making it final?
Why don't you make the listener a class outside and pass the activity reference to it?
这篇关于安卓：访问一个onClickListener内的全局变量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！