加载数据setOnItemSelectedListener [英] Load Data setOnItemSelectedListener
问题描述
问题：我载入我的课上，setOnItemSelectedListener函数运行 并设置变量瓦数为特定的值，这取决于产品 在微调被选中。
我怎样才能prevent这种情况发生，我怎么能包括自定义 的变量值功率？
说明：
我有一类叫做编辑照明。在这一类中的所有我想要做的是从数据库加载数据。当前在选择了光型喷丝，我联想到它的值。例如我挑的 CFL - 功率然后26
不过，我让用户在编辑文本字段中添加自定义的功率。
我的问题是，在编辑照明加载时的数据（以下级）在 setOnItemSelectedListener 函数运行立竿见影。我怎样才能prevent呢？
我怎样才能prevent从触发直线距离该功能，自定义功率显示？
任何人都可以提供一个可行的解决方案？
在此先感谢。 见下文code 的
公共类EditLighting延伸活动{
公共微调mEdit;
公共mEdit3;
公共字符串lightingType，瓦数;
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.editlighting）;
如果（价值==检索）{
SAMPLEDB = getBaseContext（）openOrCreateDatabase（ClientList.retrievedClient +，MODE_PRIVATE，空分贝）。
}
光标C = sampleDB.rawQuery（SELECT * FROM tbl_lightingData WHERE l_id =？，新的String [] {RoomOverview.getID [1]}）;
如果（C！= NULL）{
如果（c.moveToFirst（））{
做 {
//获取光源类型
lightingType = c.getString（c.getColumnIndex（lightType））;
如果（lightingType.equals（CFL））{
lightIndex = 0;
}
否则，如果（lightingType.equals（节能灯相当于100W卤素灯斑））{
lightIndex = 1;
}
mEdit =（微调）findViewById（R.id.t1）;
mEdit.setSelection（lightIndex）;
//mEdit.setEnabled(false）;
瓦数= c.getString（c.getColumnIndex（lightWattage））;
mEdit3 =（EditText上）findViewById（R.id.t4）;
mEdit3.setText（瓦特）;
Toast.makeText（getApplicationContext（），瓦数=+瓦数，Toast.LENGTH_LONG）.show（）;
}而（c.moveToNext（））;
}
}
c.close（）;
mEdit.setOnItemSelectedListener（新OnItemSelectedListener（）{
公共无效onItemSelected（适配器视图＆LT;＆GT;为arg0，查看ARG1，INT ARG2，长ARG3）{
。lightingType = mEdit.getSelectedItem（）的toString（）;
如果（lightingType.equals（CFL））{
瓦数=12;
mEdit3.setText（瓦特）;
}
否则，如果（lightingType.equals（节能灯相当于100W卤素灯斑））{
瓦数=18;
mEdit3.setText（瓦特）;
}
Toast.makeText（getApplicationContext（），WATTAGE2 =+瓦数，Toast.LENGTH_LONG）.show（）;
}
}）;
}
}
使用code如下：
//如果为假就意味着我们正在处理的初始选择，所以我们应该忽略它
私人布尔MFLAG = FALSE;
mEdit.setOnItemSelectedListener（新OnItemSelectedListener（）{
公共无效onItemSelected（适配器视图＆LT;＆GT;为arg0，查看ARG1，INT ARG2，长ARG3）{
如果（！MFLAG）{
//从这一刻开始选择将被接受
MFLAG = TRUE;
返回;
}
// ...的code休息...
Problem: I load my class, the setOnItemSelectedListener function runs and sets variable wattage to a specific value, depending on what item was selected in the spinner.
How can I prevent this from happening, how can I include a custom value for a variable wattage?
Detail:
I have a class called edit lighting. In this class all I want to do is load the data from the database. Currently when the light type spinner is selected, I associate a value with it. e.g. I pick CFL - wattage is then 26.
But I let the user add a custom wattage in an edit text field.
My problem is, when loading the data in edit lighting (the class below) the setOnItemSelectedListener function runs straight away. How can I prevent this?
How can I prevent this function from triggering straight away, the custom wattage is shown?
Can anyone offer a viable solution?
Thanks in advance. See code below
public class EditLighting extends Activity {
public Spinner mEdit;
public mEdit3;
public String lightingType, wattage;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.editlighting);
if(value == "Retrieve"){
sampleDB = getBaseContext().openOrCreateDatabase(ClientList.retrievedClient+".db", MODE_PRIVATE, null);
}
Cursor c = sampleDB.rawQuery("SELECT * FROM tbl_lightingData WHERE l_id =?", new String[] {RoomOverview.getID[1]});
if (c != null ) {
if (c.moveToFirst()) {
do {
//get light type
lightingType = c.getString(c.getColumnIndex("lightType"));
if(lightingType.equals("CFL")){
lightIndex = 0;
}
else if (lightingType.equals("CFL Equivalent Halogen 100w spot")){
lightIndex = 1;
}
mEdit = (Spinner)findViewById(R.id.t1);
mEdit.setSelection(lightIndex);
//mEdit.setEnabled(false);
wattage = c.getString(c.getColumnIndex("lightWattage"));
mEdit3 = (EditText)findViewById(R.id.t4);
mEdit3.setText(wattage);
Toast.makeText(getApplicationContext(), "WATTAGE = "+wattage, Toast.LENGTH_LONG).show();
}while (c.moveToNext());
}
}
c.close();
mEdit.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
lightingType = mEdit.getSelectedItem().toString();
if(lightingType.equals("CFL")){
wattage = "12";
mEdit3.setText(wattage);
}
else if (lightingType.equals("CFL Equivalent Halogen 100w spot")){
wattage = "18";
mEdit3.setText(wattage);
}
Toast.makeText(getApplicationContext(), "WATTAGE2 = "+wattage, Toast.LENGTH_LONG).show();
}
});
}
}
Use the code below:
// if false it means we're dealing with the initial selection so we should ignore it
private boolean mFlag = false;
mEdit.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
if (!mFlag) {
// from this moment on the selection will be accepted
mFlag = true;
return;
}
// ...rest of code...
这篇关于加载数据setOnItemSelectedListener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IT屋！
