Onclicklistener的编程创建的按钮 [英] Onclicklistener for a programatically created button
本文介绍了Onclicklistener的编程创建的按钮的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经看过了这个答案，但似乎无法找到一个。
我已经程序创建的（而不是在XML文件）一个按钮，我想要的东西时，其点击的情况发生，显示一个警告或移动到另一个屏幕等。
按钮code：
按钮提交按钮=新按钮（本）;
submitButton.setId（99）;
submitButton.setText（提交）;
监听器code：
查看submitButtonListener = findViewById（99）;
submitButtonListener.setOnClickListener（本）;
所以我已经设置了读心人发现按钮，但我得到这个错误
在类型视图的方法setOnClickListener（View.OnClickListener）
是不适用的参数
（RegisterScreen）RegisterScreen.java / AccessibleApp / src目录/组织/项目/访问线
217 Java问题我想这可能是一些做的事实，我没有
的setContentView（）;在类的开始，因为整个页写编程（因为我需要添加复选框编程）。下面是下面的所有code，如果有帮助：
公共类RegisterScreen延伸活动{
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
//启动数据库被qureied
DatabaseData DB =新DatabaseData（本）;
DB =新DatabaseData（本）;
尝试{
db.createDataBase（）;
}
赶上（IOException异常IOE）{
抛出新的错误（无法创建数据库）;
}
尝试{
db.openDataBase（）;
}
赶上（的SQLException SQLE）{
扔SQLE;
}
SQLiteDatabase RDB = db.getReadableDatabase（）; //屏幕的主要布局
的LinearLayout layoutMain =新的LinearLayout（本）;
layoutMain.setOrientation（LinearLayout.VERTICAL）;
layoutMain.setBackgroundColor（Color.WHITE）; //线性布局横幅
的LinearLayout旗帜=新的LinearLayout（本）;
banner.setOrientation（LinearLayout.VERTICAL）;
banner.setBackgroundColor（Color.rgb（17，168，191））; //布局PARAMS的高度和宽度
的LayoutParams bannerParams =新android.widget.LinearLayout.LayoutParams（
android.widget.LinearLayout.LayoutParams.FILL_PARENT，40）;
banner.setLayoutParams（bannerParams）; //横幅文字
TextView的bannerText =新的TextView（本）;
bannerText.setText（注册）;
bannerText.setTextColor（Color.WHITE）;
banner.addView（bannerText）;
bannerText.setTextSize（24）;
bannerText.setGravity（Gravity.CENTER）; //添加旗帜布局主要布局
layoutMain.addView（旗）; 在屏幕的其余部分//滚动视图
滚动型SV =新的滚动型（本）;
//表布局调整项目登记表项目
TableLayout TL =新TableLayout（本）; //表行把页面的左，右两侧的项目
的TableRow usernameTR =新的TableRow（本）; //用户名标签
TextView的usernameL =新的TextView（本）;
usernameL.setText（用户名：）;
usernameL.setTextColor（Color.BLACK）;
usernameTR.addView（usernameL）; //用户名文本框
的EditText usernameTB =新的EditText（本）;
usernameTB.setWidth（250）;
usernameTR.addView（usernameTB）;
tl.addView（usernameTR）; 的TableRow emailTR =新的TableRow（本）; //邮件标签
TextView的emailL =新的TextView（本）;
emailL.setText（电子邮件：）;
emailL.setTextColor（Color.BLACK）;
emailTR.addView（emailL）; //电子邮件文本框
的EditText emailTB =新的EditText（本）;
emailTB.setWidth（250）;
emailTR.addView（emailTB）;
tl.addView（emailTR）; 的TableRow forenameTR =新的TableRow（本）; //用名字标签
TextView的forenameL =新的TextView（本）;
forenameL.setText（用名字：）;
forenameL.setTextColor（Color.BLACK）;
forenameTR.addView（forenameL）; //用名字文本框
的EditText forenameTB =新的EditText（本）;
forenameTB.setWidth（250）;
forenameTR.addView（forenameTB）;
tl.addView（forenameTR）; 的TableRow surnameTR =新的TableRow（本）; //姓标签
TextView的surnameL =新的TextView（本）;
surnameL.setText（姓：）;
surnameL.setTextColor（Color.BLACK）;
surnameTR.addView（surnameL）; //姓文本框
的EditText surnameTB =新的EditText（本）;
surnameTB.setWidth（250）;
surnameTR.addView（surnameTB）;
tl.addView（surnameTR）; 的TableRow streetTR =新的TableRow（本）; //街标签
TextView的streetL =新的TextView（本）;
streetL.setText（街道）;
streetL.setTextColor（Color.BLACK）;
streetTR.addView（streetL）; //街道文本框
的EditText streetTB =新的EditText（本）;
streetTB.setWidth（250）;
streetTR.addView（streetTB）;
tl.addView（streetTR）; 后期的TableRow codeTR =新的TableRow（本）; //后code标签
TextView中后codeL =新的TextView（本）;
后codeL.setText（邮报code：）;
后codeL.setTextColor（Color.BLACK）;
后codeTR.addView（后codeL）; //后code文本
后期的EditText codeTB =新的EditText（本）;
后codeTB.setWidth（250）;
后codeTR.addView（后codeTB）;
tl.addView（后codeTR）; 的TableRow cityTR =新的TableRow（本）; //城市标签
TextView的cityL =新的TextView（本）;
cityL.setText（城市）;
cityL.setTextColor（Color.BLACK）;
cityTR.addView（cityL）; //城市文本框
的EditText cityTB =新的EditText（本）;
cityTB.setWidth（250）;
cityTR.addView（cityTB）;
tl.addView（cityTR）; 的TableRow countyTR =新的TableRow（本）; //县标签
TextView的countyL =新的TextView（本）;
countyL.setText（县）;
countyL.setTextColor（Color.BLACK）;
countyTR.addView（countyL）; //县文本框
的EditText countyTB =新的EditText（本）;
countyTB.setWidth（250）;
countyTR.addView（countyTB）;
tl.addView（countyTR）; //表布局添加滚动视图 //国家下拉
TextView的catTitle =新的TextView（本）;
catTitle.setText（\\ n请选择影响您的类别：\\ n）;
catTitle.setTextColor（Color.BLACK）;
tl.addView（catTitle）;
//类别
//类标题 的String [] COLS = {_id，cat_name};要搜索//列
光标光标= rdb.query（aa_category，COLS，NULL，NULL，NULL，NULL，NULL）; //查询保存到数据库
而（cursor.moveToNext（））{
复选框catCB =新的复选框（本）;
字符串名称= cursor.getString（1）;
INT ID = cursor.getInt（0）;
catCB.setId（ID）;
catCB.setText（\\ n+名字+\\ n）;
catCB.setTextColor（Color.BLACK）;
tl.addView（catCB）;
}
//添加字段与文本字段新的类别，将成为活跃在点击复选框
按钮提交按钮=新按钮（本）;
submitButton.setId（99）;
submitButton.setText（提交）; 查看submitButtonListener = findViewById（99）; submitButtonListener.setOnClickListener（本）; tl.addView（提交按钮）; //表布局添加滚动视图
sv.addView（TL）;
//滚动视图添加到主布局
layoutMain.addView（SV）;
this.setContentView（layoutMain）; }
}
解决方案您的活动没有实施View.OnClickListener。您的类定义更改为
公共类RegisterScreen扩展活动实现View.OnClickListener和添加
公共无效的onClick（视图v）{}你的Activity类。
I have looked for an answer for this but can't seem to find one.
I have a button that has been created programmatically (rather than in the xml file) and I want something to happen when its clicked, show an alert or move to another screen etc.
Button code:
Button submitButton = new Button(this); submitButton.setId(99); submitButton.setText("Submit");Listener code:
View submitButtonListener = findViewById(99); submitButtonListener.setOnClickListener(this);So I have set up the listner to find that button but I get this error
The method setOnClickListener(View.OnClickListener) in the type View is not applicable for the arguments (RegisterScreen) RegisterScreen.java /AccessibleApp/src/org/project/accessible line 217 Java Problem
I think it may be something to do with the fact that I don't have
setContentView();at the start of the class because the whole page is written programmatically (because I need to add checkboxes programmatically).Here is the all the code below if it helps:
public class RegisterScreen extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //initiate the database to be qureied DatabaseData db = new DatabaseData(this); db = new DatabaseData(this); try { db.createDataBase(); } catch (IOException ioe) { throw new Error("Unable to create database"); } try { db.openDataBase(); } catch(SQLException sqle){ throw sqle; } SQLiteDatabase rdb = db.getReadableDatabase(); //main layout of the screen LinearLayout layoutMain = new LinearLayout(this); layoutMain.setOrientation(LinearLayout.VERTICAL); layoutMain.setBackgroundColor(Color.WHITE); //Linear Layout for the Banner LinearLayout banner = new LinearLayout(this); banner.setOrientation(LinearLayout.VERTICAL); banner.setBackgroundColor(Color.rgb(17, 168, 191)); //layout params for height and width LayoutParams bannerParams = new android.widget.LinearLayout.LayoutParams( android.widget.LinearLayout.LayoutParams.FILL_PARENT, 40); banner.setLayoutParams(bannerParams); //Banner text TextView bannerText = new TextView(this); bannerText.setText("Register"); bannerText.setTextColor(Color.WHITE); banner.addView(bannerText); bannerText.setTextSize(24); bannerText.setGravity(Gravity.CENTER); //add banner layout to main layout layoutMain.addView(banner); //Scroll view for the rest of the screen ScrollView sv = new ScrollView(this); //Table layout to align the items register form items TableLayout tl = new TableLayout(this); //Table rows to put items on left and right sides of the page TableRow usernameTR = new TableRow(this); //Username label TextView usernameL = new TextView(this); usernameL.setText("Username:"); usernameL.setTextColor(Color.BLACK); usernameTR.addView(usernameL); //Username textbox EditText usernameTB = new EditText(this); usernameTB.setWidth(250); usernameTR.addView(usernameTB); tl.addView(usernameTR); TableRow emailTR = new TableRow(this); //email label TextView emailL = new TextView(this); emailL.setText("Email:"); emailL.setTextColor(Color.BLACK); emailTR.addView(emailL); //email textbox EditText emailTB = new EditText(this); emailTB.setWidth(250); emailTR.addView(emailTB); tl.addView(emailTR); TableRow forenameTR = new TableRow(this); //forename label TextView forenameL = new TextView(this); forenameL.setText("Forename:"); forenameL.setTextColor(Color.BLACK); forenameTR.addView(forenameL); //forename textbox EditText forenameTB = new EditText(this); forenameTB.setWidth(250); forenameTR.addView(forenameTB); tl.addView(forenameTR); TableRow surnameTR = new TableRow(this); //surname label TextView surnameL = new TextView(this); surnameL.setText("Surname:"); surnameL.setTextColor(Color.BLACK); surnameTR.addView(surnameL); //surname textbox EditText surnameTB = new EditText(this); surnameTB.setWidth(250); surnameTR.addView(surnameTB); tl.addView(surnameTR); TableRow streetTR = new TableRow(this); //street label TextView streetL = new TextView(this); streetL.setText("Street:"); streetL.setTextColor(Color.BLACK); streetTR.addView(streetL); //street textbox EditText streetTB = new EditText(this); streetTB.setWidth(250); streetTR.addView(streetTB); tl.addView(streetTR); TableRow postcodeTR = new TableRow(this); //postcode label TextView postcodeL = new TextView(this); postcodeL.setText("Postcode:"); postcodeL.setTextColor(Color.BLACK); postcodeTR.addView(postcodeL); //postcode textbox EditText postcodeTB = new EditText(this); postcodeTB.setWidth(250); postcodeTR.addView(postcodeTB); tl.addView(postcodeTR); TableRow cityTR = new TableRow(this); //city label TextView cityL = new TextView(this); cityL.setText("City:"); cityL.setTextColor(Color.BLACK); cityTR.addView(cityL); //city textbox EditText cityTB = new EditText(this); cityTB.setWidth(250); cityTR.addView(cityTB); tl.addView(cityTR); TableRow countyTR = new TableRow(this); //county label TextView countyL = new TextView(this); countyL.setText("County:"); countyL.setTextColor(Color.BLACK); countyTR.addView(countyL); //county textbox EditText countyTB = new EditText(this); countyTB.setWidth(250); countyTR.addView(countyTB); tl.addView(countyTR); //Add table layout to the scroll view //country dropdown TextView catTitle = new TextView(this); catTitle.setText("\nPlease select the categories which affect you:\n"); catTitle.setTextColor(Color.BLACK); tl.addView(catTitle); //categories //categories title String[] cols = {"_id", "cat_name"}; //columns to be searched Cursor cursor = rdb.query("aa_category", cols, null, null, null, null, null); // save the query to the db while (cursor.moveToNext()) { CheckBox catCB = new CheckBox(this); String name = cursor.getString(1); int id = cursor.getInt(0); catCB.setId(id); catCB.setText("\n"+name+"\n"); catCB.setTextColor(Color.BLACK); tl.addView(catCB); } //add field for new category with a text field that will become active on clicking the checkbox Button submitButton = new Button(this); submitButton.setId(99); submitButton.setText("Submit"); View submitButtonListener = findViewById(99); submitButtonListener.setOnClickListener(this); tl.addView(submitButton); //Add table layout to the scroll view sv.addView(tl); //Add scroll view to the main layout layoutMain.addView(sv); this.setContentView(layoutMain); } }
解决方案Your activity isn't implementing View.OnClickListener. Change your class definition to
public class RegisterScreen extends Activity implements View.OnClickListenerand add
public void onClick(View v) { }to your Activity class.
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