所以我的应用中有一个按钮和一个编辑文本。当我单击按钮并在编辑文本中写入内容时， TextView 会发生变化。除了一件事之外，一切都按原样进行。我必须单击按钮两次才能使其工作(仅在我第一次打开 Activity 时)。打开 Activity 后，我第一次按下按钮并没有任何反应，之后它就可以正常工作了。
我已经对此进行了研究，据我所知，造成麻烦的是注意力，但我尝试了一些方法，但没有任何效果。
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
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，我还尝试将 requestFocus 添加到按钮 XML，但它仍然不起作用。我还从 edittext 中删除了 requestFocus ，但它不起作用。我已经没有什么可以尝试的想法了。
onClick 方法:
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;
}
}
});
}
最佳答案
我的问题是 Button XML 定义:
android:focusableInTouchMode="true"
去掉这个属性，按钮就不需要被触摸两次了。似乎第一次触摸被用于将焦点分配在按钮上，第二次触摸然后触发 OnClickListener。
请注意，使用 android:focusable="true" 属性的 Button 可以正常工作。
关于java - 我必须单击该按钮两次才能使其工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17261876/