Button在AlertDialog中的布局

在Android中，要將Button添加到AlertDialog中，您需要使用setPositiveButton()、setNegativeButton()和setNeutralButton()方法

import androidx.appcompat.app.AppCompatActivity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void showAlertDialog(View view) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Alert Dialog")
                .setMessage("This is an example of an Alert Dialog with buttons.")
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "OK button clicked", Toast.LENGTH_SHORT).show();
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "Cancel button clicked", Toast.LENGTH_SHORT).show();
                    }
                })
                .setNeutralButton("Ignore", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "Ignore button clicked", Toast.LENGTH_SHORT).show();
                    }
                });

        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }
}

在這個例子中，我們創建了一個帶有標題、消息和三個按鈕（積極的、消極的和中立的）的AlertDialog。當用戶點擊其中一個按鈕時，將顯示一個Toast消息。要顯示此對話框，請在XML布局文件中添加一個Button，并將其android:onClick屬性設置為showAlertDialog。