在edittext旁边添加+和-按钮的Android java代码

import android.content.Context;
import android.graphics.Color;
import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
    private LinearLayout linearLayout;
    private EditText editText;
    private Button plusButton;
    private Button minusButton;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        linearLayout = findViewById(R.id.linearLayout);
        editText = findViewById(R.id.editText);
        
        // 创建包含"+"按钮的LinearLayout
        LinearLayout buttonLayout = new LinearLayout(this);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        buttonLayout.setLayoutParams(params);
        buttonLayout.setOrientation(LinearLayout.HORIZONTAL);
        buttonLayout.setGravity(Gravity.CENTER);
        
        // 创建"+"按钮
        plusButton = new Button(this);
        plusButton.setLayoutParams(params);
        plusButton.setText("+");
        plusButton.setTextColor(Color.BLACK);
        plusButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int value = Integer.parseInt(editText.getText().toString());
                editText.setText(String.valueOf(value + 1));
            }
        });
        
        // 创建"-"按钮
        minusButton = new Button(this);
        minusButton.setLayoutParams(params);
        minusButton.setText("-");
        minusButton.setTextColor(Color.BLACK);
        minusButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int value = Integer.parseInt(editText.getText().toString());
                editText.setText(String.valueOf(value - 1));
            }
        });
        
        // 将按钮添加到按钮布局中
        buttonLayout.addView(minusButton);
        buttonLayout.addView(plusButton);
        
        // 将按钮布局添加到主布局中
        linearLayout.addView(buttonLayout);
    }
}