![](/img/trans.png)
[英]How do I create a New TextView Progmatically when a button is clicked?
[英]How to create a new TextView in another activity when I press the button?
每次在AgendaActivity
按下按钮时,我都试图创建一个新的 TextView ,但我无法弄清楚。 我读了一些关于捆绑的东西,但我很困惑。 请你帮助我好吗? 谢谢! PS:在AgendaActivity
中只是一个空的线性布局。
爪哇:
package com.exemple.android.calendar;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Editable;
import android.text.InputFilter;
import android.text.Spanned;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
public class NewEventActivity extends AppCompatActivity {
//step 1.A:create objects
public EditText DayEditText;
public EditText MonthEditText;
public EditText YearEditText;
public EditText StartingHourEditText;
public EditText StartingMinuteEditText;
public EditText EndingHourEditText;
public EditText EndingMinuteEditText;
public EditText Title;
public RadioGroup answer1;
public Button NewEventButton;
int day, month, year, s_hour, s_min, e_hour, e_min;
String title;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.new_event_page);
//Step 1.B: assign objects
DayEditText = findViewById(R.id.DayEditText);
MonthEditText = findViewById(R.id.MonthEditText);
YearEditText = findViewById(R.id.YearEditText);
StartingHourEditText = findViewById(R.id.StartingHourEditText);
StartingMinuteEditText = findViewById(R.id.StartingMinuteEditText);
EndingHourEditText = findViewById(R.id.EndingHourEditText);
EndingMinuteEditText = findViewById(R.id.EndingMinuteEditText);
Title = findViewById(R.id.TitleEditText);
answer1 = findViewById(R.id.Answer1);
NewEventButton = findViewById(R.id.CreateEventButton);
DayEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "31")});
MonthEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "12")});
YearEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "2030")});
StartingHourEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "24")});
StartingMinuteEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "59")});
EndingHourEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "24")});
EndingMinuteEditText.setFilters(new InputFilter[]{new MinMaxFilter("0", "59")});
//Step 2: get data into variables
//Step 2.B: get data and assign
//PROBLEM: If we just extract, the code won't be run because there's nothing to extract yet. We need a conditional.
//SOLUTION: Create a condition for pressing the button, and then extract the variables when the button is pressed.
TextWatcher dayTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
day = Integer.parseInt(DayEditText.getText().toString());
}
};
TextWatcher monthTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
month = Integer.parseInt(MonthEditText.getText().toString());
}
};
TextWatcher yearTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
year = Integer.parseInt(YearEditText.getText().toString());
}
};
TextWatcher titleTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
title = Title.getText().toString();
}
};
TextWatcher s_hourTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
s_hour = Integer.parseInt(StartingHourEditText.getText().toString());
}
};
TextWatcher s_minTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
s_min = Integer.parseInt(StartingMinuteEditText.getText().toString());
}
};
TextWatcher e_minTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
e_min = Integer.parseInt(EndingMinuteEditText.getText().toString());
}
};
TextWatcher e_hourTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
e_hour = Integer.parseInt(EndingHourEditText.getText().toString());
}
};
DayEditText.addTextChangedListener(dayTextWatcher);
MonthEditText.addTextChangedListener(monthTextWatcher);
YearEditText.addTextChangedListener(yearTextWatcher);
Title.addTextChangedListener(titleTextWatcher);
StartingMinuteEditText.addTextChangedListener(s_minTextWatcher);
StartingHourEditText.addTextChangedListener(s_hourTextWatcher);
EndingMinuteEditText.addTextChangedListener(e_minTextWatcher);
EndingHourEditText.addTextChangedListener(e_hourTextWatcher);
NewEventButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
answer1.clearCheck();
Intent agendaPageGoing = new Intent(getApplicationContext(), AgendaActivity.class);
startActivity(agendaPageGoing);
}
});
}
}
PPS:该应用程序是一个日历。 当我按下按钮时,它应该使用数据创建一个新的 TextView,但稍后我会将详细信息放入其中。 如果可以,请帮我完成这项任务。
创建线性或相对布局
在创建
RelativeLayout rLayout = (RelativeLayout) findViewById(R.id.rLayout); final TextView[] myTextViews = new TextView[20]; int i = 0;
在按钮上单击
final TextView tempTextView = new TextView(getApplicationContext()); tempTextView.setText("Display Text"); myTextViews[i] = tempTextView; rLayout.addView(myTextViews[i]); i++;
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.