- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
当您在应用程序中按下按钮时,您将如何删除某些元素,例如微调器和复选框?
谢谢!
编辑:
在我的情况下,我有一个“复制”按钮,当您单击该按钮时,会出现一个复选框,您可以添加任意多个。所以当我想删除它们时我不确定,因为我没有为这些重复的复选框设置变量名来删除..下面是创建新复选框的代码。注意:buttontest 是应该删除其他项目的按钮。我用粗体突出显示了我认为是问题所在的代码。
public class create extends AppCompatActivity {
private LinearLayout mLinearLayout;
private ArrayList<SearchableSpinner> mSpinners;
//TODO add the below list of buttons and checkboxes
private List<AppCompatButton> mButtons = new ArrayList<>();
private List<CheckBox> mCheckboxes = new ArrayList<>();
Button buttontest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mSpinners = new ArrayList<>();
mLinearLayout = findViewById(R.id.my_linearLayout);
//mLinearLayout.addView(makeSpinner()); // First spinner
FloatingActionButton floatingActionButton =
(FloatingActionButton) findViewById(R.id.fab);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(getBaseContext(), "Item added!" , Toast.LENGTH_SHORT ).show();
// Handle the click.
Spinner spinner = makeSpinner();
mLinearLayout.addView(spinner); //Add another spinner
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams)spinner.getLayoutParams();
layoutParams.setMargins( 5, 70, 10, 0);
Resources resources = getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
layoutParams.height = (int) (80 * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT)); //80
layoutParams.width = (int) (240 * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT)); //240
spinner.setLayoutParams(layoutParams);
//Add a new button
AppCompatButton newButton = makeButton();
mLinearLayout.addView(newButton); // Add another button
//TODO add button to the list
mButtons.add(newButton);
//Add a new checkbox
CheckBox newCheckbox = makeCheckbox();
mLinearLayout.addView(newCheckbox);
//TODO add checkbox to your list
mCheckboxes.add(newCheckbox);
}
});
}
//DUPLICATING ITEMS WHEN + IS PRESSED
private CheckBox makeCheckbox() {
//Create new Checkbox
CheckBox checkbox = new CheckBox(this);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
checkbox.setLayoutParams(layoutParams);
return checkbox;
}
private AppCompatButton makeButton() { //creates new buttons i need
//Create new Button
AppCompatButton button = new AppCompatButton(this);
// code for deleting the buttons i need //
buttontest = (Button)findViewById(R.id.buttontest);
buttontest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getBaseContext(), "Item removed." , Toast.LENGTH_SHORT ).show();
//makeCheckbox().setVisibility(View.GONE);
//buttontest.setVisibility(View.GONE);
//TODO when you want to make one of them gone do the following
//Last button disappears
if(mButtons.size() > 0) {
mButtons.get(mButtons.size()-1).setVisibility(View.GONE);
//mButtons.remove(mButtons.size()-1);
}
//Last checkbox disappears
if(mCheckboxes.size() > 0) {
mCheckboxes.get(mCheckboxes.size()-1).setVisibility(View.GONE);
// mCheckboxes.remove(mCheckboxes.size()-1);
}
//Last checkbox disappears
if(mSpinners.size() > 0) {
mSpinners.get(mSpinners.size()-1).setVisibility(View.GONE);
// mSpinners.remove(mSpinners.size()-1);
}
//Please note that the number within get() is the index of the buttons or
//checkboxes you added so there could
//be any number of items depends on how many you added
}
});
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
button.setBackgroundColor(Color.parseColor("#ffffff"));
return button;
}
private Spinner makeSpinner() {
//opens csv
InputStream inputStream = getResources().openRawResource(R.raw.shopitems);
CSVFile csvFile = new CSVFile(inputStream);
List<String> itemList = csvFile.read();
//Create new spinner
// SearchableSpinner spinner = (SearchableSpinner) new Spinner(this, Spinner.MODE_DROPDOWN);
SearchableSpinner spinner = new SearchableSpinner(this);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
spinner.setLayoutParams(layoutParams);
MyListAdapter adapter = new MyListAdapter(this, R.layout.listrow, R.id.txtid, itemList);
spinner.setAdapter(adapter);
//Add it to your list of spinners so you can retrieve their data when you click the getSpinner button
mSpinners.add(spinner);
return spinner;
}
//csv file code
private class CSVFile {
InputStream inputStream;
public CSVFile(InputStream inputStream) {
this.inputStream = inputStream;
}
public List<String> read() {
List<String> resultList = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
try {
String line;
while ((line = reader.readLine()) != null) {
String[] row = line.split(",");
resultList.add(row[1]);
}
} catch (IOException e) {
Log.e("Main", e.getMessage());
} finally {
try {
inputStream.close();
} catch (IOException e) {
Log.e("Main", e.getMessage());
}
}
return resultList;
}
}
}
最佳答案
更新:以下答案的解释:OP 通过以下方式添加了 Checkboxes、Buttons 和 Spinners 的实例(Checkbox 示例):
private CheckBox makeCheckbox() {
//Create new Checkbox
CheckBox checkbox = new CheckBox(this);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
checkbox.setLayoutParams(layoutParams);
return checkbox;
}
创建这些 View 的实例后,它们被保存在 List<>
中像这样跟踪:
private List<CheckBox> mCheckboxes = new ArrayList<>();
//Add a new checkbox
CheckBox newCheckbox = makeCheckbox();
//TODO add checkbox to your list
mCheckboxes.add(newCheckbox);
最后新 View 被添加到根ViewGroup
在我们的例子中是 LinearLayout:
private LinearLayout mLinearLayout;
mLinearLayout = findViewById(R.id.my_linearLayout);
mLinearLayout.addView(newCheckbox);
当使任何元素消失并删除它们的实例时,我通过 List<>
访问它们的实例我保持:
mCheckboxes.get(mCheckboxes.size()-1).setVisibility(View.GONE);
mCheckboxes.remove(mCheckboxes.size()-1);
这是我认为你应该做的:你应该创建一个按钮列表和一个复选框列表,就像你为微调器所做的那样,在那里你可以获得你创建的按钮和复选框的实例:
private LinearLayout mLinearLayout;
private ArrayList<Spinner> mSpinners;
//TODO add the below list of buttons and checkboxes
private List<AppCompatButton> mButtons = new ArrayList<>();
private List<CheckBox> mCheckboxes = new ArrayList<>();
Button buttontest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mSpinners = new ArrayList<>();
mLinearLayout = findViewById(R.id.my_linearLayout);
//mLinearLayout.addView(makeSpinner()); // First spinner
FloatingActionButton floatingActionButton =
(FloatingActionButton) findViewById(R.id.fab);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Handle the click.
Spinner spinner = makeSpinner();
mLinearLayout.addView(spinner); //Add another spinner
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams)spinner.getLayoutParams();
layoutParams.setMargins( 5, 70, 10, 0);
layoutParams.height = 80;//pixels
layoutParams.width = 240;//pixels
spinner.setLayoutParams(layoutParams);
//Add a new button
AppCompatButton newButton = makeButton();
mLinearLayout.addView(newButton); // Add another button
//TODO add button to the list
mButtons.add(newButton);
//Add a new checkbox
CheckBox newCheckbox = makeCheckbox();
mLinearLayout.addView(newCheckbox);
//TODO add checkbox to your list
mCheckboxes.add(newCheckbox);
}
});
//TODO when you want to make one of them gone do the following
//Last button disappears
If(mButtons.size() > 0) {
mButtons.get(mButtons.size()-1).setVisibility(View.GONE);
}
//Last checkbox disappears
If(mCheckboxes.size() > 0) {
mCheckboxes.get(mCheckboxes.size() - 1).setVisibility(View.GONE);
}
//Please note that the number within get() is the index of the buttons or
//checkboxes you added so there could
//be any number of items depends on how many you added
}
//DUPLICATING ITEMS WHEN + IS PRESSED
private CheckBox makeCheckbox() {
//Create new Checkbox
CheckBox checkbox = new CheckBox(this);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
checkbox.setLayoutParams(layoutParams);
return checkbox;
}
**private AppCompatButton makeButton() { //creates new buttons i need
//Create new Button
AppCompatButton button = new AppCompatButton(this);
// code for deleting the buttons i need //
buttontest = (Button)findViewById(R.id.buttontest);
buttontest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
buttontest.setVisibility(View.GONE);
makeCheckbox().setVisibility(View.GONE);
}
});**
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
button.setBackgroundColor(Color.parseColor("#ffffff"));
return button;
}
private Spinner makeSpinner() {
//opens csv
InputStream inputStream = getResources().openRawResource(R.raw.shopitems);
CSVFile csvFile = new CSVFile(inputStream);
List<String> itemList = csvFile.read();
//Create new spinner
Spinner spinner = new Spinner(this, Spinner.MODE_DROPDOWN);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
spinner.setLayoutParams(layoutParams);
MyListAdapter adapter = new MyListAdapter(this, R.layout.listrow, R.id.txtid, itemList);
spinner.setAdapter(adapter);
//Add it to your list of spinners so you can retrieve their data when you click the getSpinner button
mSpinners.add(spinner);
return spinner;
}
//csv file code
private class CSVFile {
InputStream inputStream;
public CSVFile(InputStream inputStream) {
this.inputStream = inputStream;
}
public List<String> read() {
List<String> resultList = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
try {
String line;
while ((line = reader.readLine()) != null) {
String[] row = line.split(",");
resultList.add(row[1]);
}
} catch (IOException e) {
Log.e("Main", e.getMessage());
} finally {
try {
inputStream.close();
} catch (IOException e) {
Log.e("Main", e.getMessage());
}
}
return resultList;
}
}
}
新编辑:
public class create extends AppCompatActivity {
private LinearLayout mLinearLayout;
private ArrayList<Spinner> mSpinners;
//TODO add the below list of buttons and checkboxes
private List<AppCompatButton> mButtons = new ArrayList<>();
private List<CheckBox> mCheckboxes = new ArrayList<>();
Button buttontest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mSpinners = new ArrayList<>();
mLinearLayout = findViewById(R.id.my_linearLayout);
//mLinearLayout.addView(makeSpinner()); // First spinner
FloatingActionButton floatingActionButton =
(FloatingActionButton) findViewById(R.id.fab);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Handle the click.
Spinner spinner = makeSpinner();
mLinearLayout.addView(spinner); //Add another spinner
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams)spinner.getLayoutParams();
layoutParams.setMargins( 5, 70, 10, 0);
layoutParams.height = 80;//pixels
layoutParams.width = 240;//pixels
spinner.setLayoutParams(layoutParams);
//Add a new button
AppCompatButton newButton = makeButton();
mLinearLayout.addView(newButton); // Add another button
//TODO add button to the list
mButtons.add(newButton);
//Add a new checkbox
CheckBox newCheckbox = makeCheckbox();
mLinearLayout.addView(newCheckbox);
//TODO add checkbox to your list
mCheckboxes.add(newCheckbox);
}
});
}
//DUPLICATING ITEMS WHEN + IS PRESSED
private CheckBox makeCheckbox() {
//Create new Checkbox
CheckBox checkbox = new CheckBox(this);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
checkbox.setLayoutParams(layoutParams);
return checkbox;
}
private AppCompatButton makeButton() { //creates new buttons i need
//Create new Button
AppCompatButton button = new AppCompatButton(this);
// code for deleting the buttons i need //
buttontest = (Button)findViewById(R.id.buttontest);
buttontest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//makeCheckbox().setVisibility(View.GONE);
//buttontest.setVisibility(View.GONE);
//TODO when you want to make one of them gone do the following
//Last button disappears
if(mButtons.size() > 0) {
mButtons.get(mButtons.size()-1).setVisibility(View.GONE);
mButtons.remove(mButtons.size()-1);
}
//Last checkbox disappears
if(mCheckboxes.size() > 0) {
mCheckboxes.get(mCheckboxes.size()-1).setVisibility(View.GONE);
mCheckboxes.remove(mCheckboxes.size()-1);
}
//Please note that the number within get() is the index of the buttons or
//checkboxes you added so there could
//be any number of items depends on how many you added
}
});
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
button.setBackgroundColor(Color.parseColor("#ffffff"));
return button;
}
private Spinner makeSpinner() {
//opens csv
InputStream inputStream = getResources().openRawResource(R.raw.shopitems);
CSVFile csvFile = new CSVFile(inputStream);
List<String> itemList = csvFile.read();
//Create new spinner
Spinner spinner = new Spinner(this, Spinner.MODE_DROPDOWN);
// Setup layout
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
spinner.setLayoutParams(layoutParams);
MyListAdapter adapter = new MyListAdapter(this, R.layout.listrow, R.id.txtid, itemList);
spinner.setAdapter(adapter);
//Add it to your list of spinners so you can retrieve their data when you click the getSpinner button
mSpinners.add(spinner);
return spinner;
}
//csv file code
private class CSVFile {
InputStream inputStream;
public CSVFile(InputStream inputStream) {
this.inputStream = inputStream;
}
public List<String> read() {
List<String> resultList = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
try {
String line;
while ((line = reader.readLine()) != null) {
String[] row = line.split(",");
resultList.add(row[1]);
}
} catch (IOException e) {
Log.e("Main", e.getMessage());
} finally {
try {
inputStream.close();
} catch (IOException e) {
Log.e("Main", e.getMessage());
}
}
return resultList;
}
}
}
关于android - 在android中按下按钮时如何删除某些元素,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51737773/
在开发中的网页上,我在 IE 上遇到此错误 element = $(element); 此代码位于prototype.js 预期对象 如何消除此错误。 更新: 现场也使用了 jQuery。 最佳答
我有两个大小相同的嵌套数组: Array1 =[[1, 2], [], [2, 3]] Array2= [[1, 4], [8, 11], [3, 6]] 我需要将它们合并到一个数组中,如下所示: A
我有一些 jQuery 代码,当单击具有特定 ID 的项目时运行。当 ID 是 的一部分时,它就可以工作。元素,但当它位于 中时则不然元素。为什么会这样呢?我想使用 an,因为如果用户关闭了 Ja
Flex-box 规范 3声明 flex 元素不是 block 容器: A flex item establishes a new formatting context for its content
我遇到了一个意想不到的问题。 HTML JS $(function() { var $divs = $('.myDiv'); // create new div not in
我使用 Bootstrap 和 Ember.js 得到了一个无序列表。每个列表项都是一个显示新帖子的链接,每当您单击该链接时,Ember 都会添加类 active默认情况下。我正在使用 Bootstr
我正在尝试让一个函数正常工作,但运气不佳,所以我想向 Stackoverflow 智囊团提出一个新手问题! 基本上,我有一个表单,并且循环遍历所有元素以查看是否存在自定义数据属性。如果存在,则保持该元
我想映射一个可选数组,删除那些 nil 值,并使用另一个函数映射非 nil 值。 我知道我可以通过使用 compactMap 然后使用常规 map 来实现这一点,但我只想遍历数组一次。 我为此实现了一
我如何定位 li 元素,除非它们出现在 之后元素?换句话说,我想针对步骤而不是注释。 我尝试向 OL 添加一个我想从选择中排除的类,但我想出的代码不起作用。 (顺便说一句,重构 html 不是一种选
Warning 1 The element 'system.webServer' has invalid child element 'rewrite'. List of possible eleme
我正在尝试编写一个脚本,该脚本将遍历 HTML 源并创建 DOM 的 JSON 文件,然后使用 d3.js 在 TreeView 中显示该文件。我遇到的问题是不仅希望显示元素(TITLE、P、LI 等
我有以下 HTML 表单:- Option 1 Option 2
我试图在选定的 HTML 元素之后选择下一个具有类名 slider-value 的 span 元素。我尝试了多种解决方案,但没有一个有效。 我可以通过 id 选择它,但我不希望那样做使代码冗余。 $(
如果电子邮件地址无效,我想在屏幕上显示一条消息“请输入有效的电子邮件地址”。 body 元素的innerHTML 语句工作正常,但我用于p 元素的innerHTML 语句不起作用。 有一次,当我测试它
以下 jQuery 代码调用 ul 元素,查找元素内的前 三个 li 列表项,并隐藏剩余的 li 项目。然后,它附加一个 li 元素,其中显示“显示更多...”,并且在单击时显示之前隐藏的列表项。 (
我问了a question早些时候关于将编辑/删除链接与 h1 元素内联的最佳方法。我能够通过给出的答案实现这一点,但我现在有额外的要求,我需要在 h1 下方显示一个段落并编辑/删除链接。 到目前为止
我使用 MVC 4 和 knockout.js 库版本 2.1.0 显示从服务器检索到的大量文件的表中的以下摘录。 0)"> 正在正确检索数据,
我创建了一个脚本,该脚本在鼠标悬停在父容器上时激活,并且应该将其子元素移离鼠标。我目前已经让它工作了,但是代码的某些部分似乎与 REACT 代码应该是什么样子相矛盾。特别是两个部分。 我在渲染函数中使
我是 JS 新手,正在尝试理解项目 https://github.com/tastejs/todomvc 的代码 请参阅屏幕截图,我尝试对 button X 以及其父元素 div 设置断点,但在这两种
例如,假设有一个带有奇特颜色的标记: Something written here 使用 Visual Studio 2017 和 MVC 5 元素,有没有办法检查和定位当前应用了哪些样式,以及负责它
我是一名优秀的程序员,十分优秀!