我必须单击按钮两次才能正常工作

2022-09-01 05:12:30

所以我在我的应用程序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,文本视图会发生变化。除了一件事之外,一切都按预期工作。我必须单击该按钮两次才能使其正常工作(仅在我第一次打开活动时)。在我打开活动后,我第一次按下按钮,没有任何反应,之后它就可以正常工作。

我已经对此进行了研究,据我所知,引起麻烦的是专注,但我尝试了一些事情,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>

编辑文本 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中,但它仍然不起作用。我还从编辑文本中删除了请求Focus,但它不起作用。我的想法已经不多了,还有什么可以尝试的。

打开单击方法:

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;
            }
        }
    });
}

答案 1

我的问题是XML定义:Button

android:focusableInTouchMode="true"

删除此属性,按钮不需要触摸两次。看起来好像第一次触摸是为了将焦点分配到按钮上,然后第二次触摸触发 .OnClickListener

请注意,按钮在属性中工作没有问题。android:focusable="true"


答案 2

好吧,我终于自己弄清楚了导致问题的原因。我不敢相信我错过了这样一个明显的问题。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listener。

我所做的只是删除按钮列表,并且不再需要双击!因此,如果将来有人遇到此问题,只需确保你没有同时使用onClick方法和buttonlistener即可。

错误的代码:

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,我只是删除了onclick监听器,只留下:

public void submitQuantityButton (View v){
.
.
. //REST OF THE CODE

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