英文:
How to get text from button to edit text?
问题
这段代码运行得很好，但现在当问题是CAR时，button1 = A，button2 = R，button3 = C，当我点击button3时，button1 = INVISIBLE，edit text = A，当我点击button2时，edit text = A。我希望当点击按钮时，编辑文本从按钮获取文本并检查编辑文本中的文本。
要求：编辑文本从按钮获取字符，将此代码添加到函数中，从数组中删除最后一个索引
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
LinearLayout linearlayout;
Button button;
EditText txt;
String Array[]= {"car","blue","red","fox"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearlayout = findViewById(R.id.linearlayout);
txt = findViewById(R.id.txt);
int random = (int) (Math.random() * Array.clone().length);
StringBuilder word = new StringBuilder(Array[random]);
for (int i = 0; i < Array[random].length(); i++) {
char id = 'b';
button = new Button(this);
button.setId(id + i);
linearlayout.addView(button);
int randIndex = new Random().nextInt(word.length());
button.setText("" + word.charAt(randIndex));
word.deleteCharAt(randIndex);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
button.setVisibility(View.INVISIBLE);
txt.setText(txt.getText().toString() + button.getText());
}
});
}
}
}
英文:
> this code work very well but now when question is CAR button1 = A button2 = R button3 = C when I click button3 button1 = INVISIBLE edit text = A and when I click button2 edit text = A I want when click on button edit text get text from button and check text in edit text
#requires: edit text get char form button, add this code to function , remove last index from array
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
LinearLayout linearlayout;
Button button;
EditText txt;
String Array[]= {"car","blue","red","fox"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearlayout = findViewById(R.id.linearlayout);
txt = findViewById(R.id.txt);
int random = (int) (Math.random() * Array.clone().length);
StringBuilder word = new StringBuilder(Array[random]);
for (int i = 0; i < Array[random].length(); i++) {
char id = 'b';
button = new Button(this);
button.setId(id + i);
linearlayout.addView(button);
int randIndex = new Random().nextInt(word.length());
button.setText("" + word.charAt(randIndex));
word.deleteCharAt(randIndex);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
button.setVisibility(View.INVISIBLE);
txt.setText(txt.getText().toString() + button.getText());
}
});
}
}
}
答案1
得分: 0
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
LinearLayout linearlayout;
EditText txt;
String Array[]= {"car","blue","red","fox"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearlayout = findViewById(R.id.linearlayout);
txt = findViewById(R.id.txt);
int random = (int) (Math.random() * Array.clone().length);
StringBuilder word = new StringBuilder(Array[random]);
for (int i = 0; i < Array[random].length(); i++) {
char id = 'b';
final Button button = new Button(this);
button.setId(id + i);
linearlayout.addView(button);
int randIndex = new Random().nextInt(word.length());
button.setText("" + word.charAt(randIndex));
word.deleteCharAt(randIndex);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
button.setVisibility(View.INVISIBLE);
txt.setText(txt.getText().toString() + button.getText());
}
});
}
}
}
英文:
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
LinearLayout linearlayout;
//Button button; //TODO: is local var!
EditText txt; //Global var
String Array[]= {"car","blue","red","fox"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearlayout = findViewById(R.id.linearlayout);
txt = findViewById(R.id.txt);
int random = (int) (Math.random() * Array.clone().length);
StringBuilder word = new StringBuilder(Array[random]);
for (int i = 0; i < Array[random].length(); i++) {
char id = 'b';
final Button button = new Button(this); //local var
button.setId(id + i);
linearlayout.addView(button);
int randIndex = new Random().nextInt(word.length());
button.setText("" + word.charAt(randIndex));
word.deleteCharAt(randIndex);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//the problem was here (var button)
button.setVisibility(View.INVISIBLE);
txt.setText(txt.getText().toString() + button.getText());
}
});
}
}
}
答案2
得分: 0
不确定问题，但我发现代码存在一个问题。
txt.setText(txt.getText().toString() + button.getText());
粗体部分不会返回字符序列。应该与编辑文本相同。
button.getText().toString();
英文:
Not sure of the questions, but the one thing I did find to be an issue with the code.
txt.setText(txt.getText().toString() + button.getText());
The bolded part doesn't returns a char sequence. Should be the same thing as the edit text.
button.getText().toString();
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