我必须单击两次按钮才能工作

Question

所以我的应用程序中有一个按钮和一个edittext.当我单击按钮并在edittext中写入内容时,textview会发生变化.除了一件事,它一切正常.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).我打开活动后的第一次按下按钮,没有任何反应,之后它按预期工作.

我已经对此进行了研究,据我所知,导致问题的是焦点,但我尝试了一些事情,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,但它不起作用.我的想法还没有尝试.

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;
            }
        }
    });
}

Answer 1

我的问题是ButtonXML定义:

android:focusableInTouchMode="true"

删除此属性,该按钮不需要两次触摸.看起来似乎消耗了第一次触摸来将焦点分配给按钮,然后第二次触摸会触发按钮OnClickListener.

请注意,Button的android:focusable="true"属性没有问题.

Answer 2

好的，所以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。

我所做的就是删除按钮侦听器，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。

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：

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