我正在 Android Studio 中处理这个 bingo callboard 项目。原理是当我单击数字按钮时，它将显示在第一个 TextView 上。当我单击第二个数字按钮时，第一个 TextView 将显示当前按下的数字，前一个字符串将传递到第二个 TextView 。我该怎么做？包括应用程序的屏幕截图。 MainActivity.java 代码示例如下:
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private Activity mainActivity;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainActivity = MainActivity.this;
final Button button1 = findViewById(R.id.b1);
final Button button2 = findViewById(R.id.b2);
final Button button3 = findViewById(R.id.b3);
final Button button4 = findViewById(R.id.b4);
final Button button5 = findViewById(R.id.b5);
final TextView txt = (TextView) findViewById(R.id.presentcall);
final TextView lst = (TextView) findViewById(R.id.lastcall);
button1.setOnClickListener(new View.OnClickListener() {
Drawable background = button1.getBackground();
@Override
public void onClick(View v) {
txt.setText("B1");
if (button1.getText().equals("1"))
{
button1.setText(" 1 ");
button1.setBackgroundResource(R.drawable.onclick_border);
}
else if (button1.getText().equals(" 1 "))
{
button1.setText("1");
button1.setBackground(background);
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
Drawable background = button2.getBackground();
@Override
public void onClick(View v) {
txt.setText("B2");
if (button2.getText().equals("2"))
{
button2.setText(" 2 ");
button2.setBackgroundResource(R.drawable.onclick_border);
}
else if (button2.getText().equals(" 2 "))
{
button2.setText("2");
button2.setBackground(background);
}
}
});
button3.setOnClickListener(new View.OnClickListener() {
Drawable background = button3.getBackground();
@Override
public void onClick(View v) {
txt.setText("B3");
if (button3.getText().equals("3"))
{
button3.setText(" 3 ");
button3.setBackgroundResource(R.drawable.onclick_border);
}
else if (button3.getText().equals(" 3 "))
{
button3.setText("3");
button3.setBackground(background);
}
}
});
button4.setOnClickListener(new View.OnClickListener() {
Drawable background = button4.getBackground();
@Override
public void onClick(View v) {
txt.setText("B4");
if (button4.getText().equals("4"))
{
button4.setText(" 4 ");
button4.setBackgroundResource(R.drawable.onclick_border);
}
else if (button4.getText().equals(" 4 "))
{
button4.setText("4");
button4.setBackground(background);
}
}
});
button5.setOnClickListener(new View.OnClickListener() {
Drawable background = button5.getBackground();
@Override
public void onClick(View v) {
txt.setText("B5");
if (button5.getText().equals("5"))
{
button5.setText(" 5 ");
button5.setBackgroundResource(R.drawable.onclick_border);
}
else if (button5.getText().equals(" 5 "))
{
button5.setText("5");
button5.setBackground(background);
}
}
});
最佳答案
嘿，据我了解，您需要使用 txt textView 的数据更新 lst textview。那么您可以编写一个通用方法，可以通过单击新数据的任何按钮来调用该方法。像这样的东西:
public class MainActivity extends AppCompatActivity {
private Activity mainActivity;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainActivity = MainActivity.this;
final Button button1 = findViewById(R.id.b1);
final Button button2 = findViewById(R.id.b2);
final Button button3 = findViewById(R.id.b3);
final Button button4 = findViewById(R.id.b4);
final Button button5 = findViewById(R.id.b5);
final TextView txt = (TextView) findViewById(R.id.presentcall);
final TextView lst = (TextView) findViewById(R.id.lastcall);
button1.setOnClickListener(new View.OnClickListener() {
Drawable background = button1.getBackground();
@Override
public void onClick(View v) {
txt.setText("B1");
updateTextView("B1");
if (button1.getText().equals("1"))
{
button1.setText(" 1 ");
button1.setBackgroundResource(R.drawable.onclick_border);
}
else if (button1.getText().equals(" 1 "))
{
button1.setText("1");
button1.setBackground(background);
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
Drawable background = button2.getBackground();
@Override
public void onClick(View v) {
txt.setText("B2");
updateTextView("B2");
if (button2.getText().equals("2"))
{
button2.setText(" 2 ");
button2.setBackgroundResource(R.drawable.onclick_border);
}
else if (button2.getText().equals(" 2 "))
{
button2.setText("2");
button2.setBackground(background);
}
}
});
button3.setOnClickListener(new View.OnClickListener() {
Drawable background = button3.getBackground();
@Override
public void onClick(View v) {
txt.setText("B3");
updateTextView("B3");
if (button3.getText().equals("3"))
{
button3.setText(" 3 ");
button3.setBackgroundResource(R.drawable.onclick_border);
}
else if (button3.getText().equals(" 3 "))
{
button3.setText("3");
button3.setBackground(background);
}
}
});
button4.setOnClickListener(new View.OnClickListener() {
Drawable background = button4.getBackground();
@Override
public void onClick(View v) {
txt.setText("B4");
updateTextView("B4");
if (button4.getText().equals("4"))
{
button4.setText(" 4 ");
button4.setBackgroundResource(R.drawable.onclick_border);
}
else if (button4.getText().equals(" 4 "))
{
button4.setText("4");
button4.setBackground(background);
}
}
});
button5.setOnClickListener(new View.OnClickListener() {
Drawable background = button5.getBackground();
@Override
public void onClick(View v) {
txt.setText("B5");
updateTextView("B5");
if (button5.getText().equals("5"))
{
button5.setText(" 5 ");
button5.setBackgroundResource(R.drawable.onclick_border);
}
else if (button5.getText().equals(" 5 "))
{
button5.setText("5");
button5.setBackground(background);
}
}
});
}
private void updateTextView(String newData){
String oldData = txt.getText().toString();
lst.setText(oldData);
txt.setText(newData);
}
}
这将使用您的 txt TextView 数据更新您的最后一个 TextView 。您可以通过单击按钮来调用此方法，并将新数据作为参数。希望这对您有帮助
关于java - 如何将字符串从一个 TextView 传递到同一 Activity 的另一个 TextView ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62187723/