问题描述
所以我的应用中有一个按钮和一个编辑文本.当我单击按钮并在 edittext 中写一些东西时，textview 会发生变化.除了一件事外，一切都正常.我必须单击按钮两次才能使其工作(仅在我第一次打开活动时).在我第一次打开活动后，我按下按钮并没有任何反应，之后它就可以正常工作了.
So I have a button in my app and an edittext. When I click the button and write something in the edittext, a textview changes. It all works as it should except for one thing. I have to click on the button twice to make it work (only the first time I open activity). The very first time after I open activity I press the button and nothing happens, after that it works as it should.
我已经对此进行了研究，据我所知，引起问题的原因是专注，但我尝试了一些方法，但没有任何效果.
I already did my research on this and as far as I know the thing that is causing trouble is focus, but I tried a few things and nothing worked.
按钮 XML 代码:
<Button
android:id="@+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editText1"
android:layout_alignBottom="@+id/editText1"
android:layout_alignLeft="@+id/checkBox25"
android:text="@string/addMaterial"
android:onClick="submitQuantityButton" >
</Button>
Edittext XML 代码:
Edittext XML code:
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/spinner1"
android:ems="3"
android:inputType="number"
android:maxLength="3" >
</EditText>
我尝试将 android:focusableInTouchMode="false" 添加到按钮 XML，我也尝试将 requestFocus 添加到按钮 XML，但它仍然不起作用.我还从 edittext 中删除了 requestFocus 并且它不起作用.我已经没有别的想法可以尝试了.
I tried adding android:focusableInTouchMode="false" to button XML, I also tried adding requestFocus to button XML and it still doesn't work. I also removed the requestFocus from edittext and it doesn't work. I'm running out of ideas what else to try.
onClick 方法:
onClick method:
public void submitQuantityButton (View v){
Button submitButton = (Button)findViewById(R.id.submitButton);
final Spinner sItems = (Spinner)findViewById(R.id.spinner1);
final Context context = this;
final CheckBox cb4 = (CheckBox) findViewById(R.id.checkBox4);
final CheckBox cb5 = (CheckBox) findViewById(R.id.checkBox5);
final CheckBox cb33 = (CheckBox) findViewById(R.id.checkBox33);
final CheckBox cb30 = (CheckBox) findViewById(R.id.checkBox30);
final CheckBox cb6 = (CheckBox) findViewById(R.id.checkBox6);
final CheckBox cb7 = (CheckBox) findViewById(R.id.checkBox7);
final CheckBox cb9 = (CheckBox) findViewById(R.id.checkBox9);
final CheckBox cb10 = (CheckBox) findViewById(R.id.checkBox10);
final CheckBox cb11 = (CheckBox) findViewById(R.id.checkBox11);
final CheckBox cb12 = (CheckBox) findViewById(R.id.checkBox12);
//
final AlertDialog.Builder emptyETextErrorBuilder = new AlertDialog.Builder(context);
emptyETextErrorBuilder.setTitle("Warning");
emptyETextErrorBuilder.setMessage("Please enter a value before pressing this button");
emptyETextErrorBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
submitButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final int position = sItems.getSelectedItemPosition();
EditText quantityEditText = (EditText)findViewById(R.id.editText1);
switch (position){
case 0:
AlertDialog.Builder spinnerErrorBuilder = new AlertDialog.Builder(context);
spinnerErrorBuilder.setTitle("Warning");
spinnerErrorBuilder.setMessage("Please choose an item from the list above and then enter a certain value");
spinnerErrorBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog spinnerError = spinnerErrorBuilder.create();
spinnerError.show();
break;
case 1:
String item1 = quantityEditText.getText().toString();
if (item1.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb4.setText("Elaborate Totem (" + item1 + "/250)");
}
break;
case 2:
String item2 = quantityEditText.getText().toString();
if (item2.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb5.setText("Pile of Crystalline Dust (" + item2 + "/250)");
}
break;
case 3:
String item3 = quantityEditText.getText().toString();
if (item3.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb33.setText("Pile of Crystalline Dust (" + item3 + "/250)");
}
break;
case 4:
String item4 = quantityEditText.getText().toString();
if (item4.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb30.setText("Pile of Crystalline Dust (" + item4 + "/250)");
}
break;
case 5:
String item5 = quantityEditText.getText().toString();
if (item5.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb6.setText("Powerful Venom Sac (" + item5 + "/250)");
}
break;
case 6:
String item6 = quantityEditText.getText().toString();
if (item6.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb7.setText("Vial of Powerful Blood (" + item6 + "/250)");
}
break;
case 7:
String item7 = quantityEditText.getText().toString();
if (item7.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb9.setText("Ancient Bone (" + item7 + "/250)");
}
break;
case 8:
String item8 = quantityEditText.getText().toString();
if (item8.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb10.setText("Armored Scale (" + item8 + "/250)");
}
break;
case 9:
String item9 = quantityEditText.getText().toString();
if (item9.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb11.setText("Vicious Claw (" + item9 + "/250)");
}
break;
case 10:
String item10 = quantityEditText.getText().toString();
if (item10.matches(""))
{
AlertDialog emptyETextError = emptyETextErrorBuilder.create();
emptyETextError.show();
}
else
{
cb12.setText("Vicious Fang (" + item10 + "/250)");
}
break;
}
}
});
}
推荐答案
好吧，我终于自己找出了导致问题的原因.我不敢相信我错过了这么明显的问题.引起问题的不是焦点，而是方法本身.在我的 XML 文件中，我通过 android:onClick="onClick" 调用了 onClick 方法，然后我还在 onClick 方法中向 java 代码添加了一个按钮侦听器.
Okay so I finally figured out what caused the problem, by myself. I can't believe I missed such an obvious issue. The thing that caused problem wasn't focus, but the method itself. In my XML file I called onClick method by android:onClick="onClick" and then I also added a buttonlistener inside the onClick method to java code.
我所做的只是删除了按钮侦听器，不再需要双击！因此，如果将来有人遇到此问题，请确保您没有同时拥有 onClick 方法和按钮侦听器.
All I did was remove the buttonlistener and there's no more double clicking neccessary! So if anyone has this problem in future simply make sure you don't have an onClick method AND buttonlistener at the same time.
错误代码:
public void submitQuantityButton (View v){
submitButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
.
.
. //REST OF THE CODE
为了让它工作，我简单地删除了 onclick 监听器，只留下:
To make it work I simply deleted the onclick listener, leaving only:
public void submitQuantityButton (View v){
.
.
. //REST OF THE CODE
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