item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:layout_width="match_parent"
 

        android:layout_height="wrap_content"
        android:hint="請輸入"/>
    <Button
        android:id="@+id/bt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="確定1"/>


</LinearLayout>

MainActivity.java

import android.content.DialogInterface;
import
 
 android.support.v7.app.ActionBar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity
 
 extends AppCompatActivity {

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

    /**
     * 普通對話方塊
     *
     * @param view
     */
    public void show1(View view) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setIcon(R.mipmap.ic_launcher);
        builder.setTitle("對話方塊");
        builder.setMessage("內容");
        builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_LONG).show();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_LONG).show();
            }
        });
        builder.show();
    }

    /**
     * 單選對話方塊
     *
     * @param view
     */
    public void show2(View view) {
        final String single_item[] = {"男", "女", "大一", "大二"};
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setIcon(R.mipmap.ic_launcher);
        builder.setTitle("對話方塊");
        builder.setSingleChoiceItems(single_item, 1, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "" + single_item[which], Toast.LENGTH_LONG).show();
            }
        });
        builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "退出", Toast.LENGTH_LONG).show();
                dialog.dismiss();
            }
        });
        builder.create().show();
    }

    /**
     * 多選對話方塊
     *
     * @param view
     */
    public void show3(View view) {
        final String single_item[] = {"男", "女", "大一", "大二"};
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setIcon(R.mipmap.ic_launcher);
        builder.setTitle("對話方塊");
        builder.setMultiChoiceItems(single_item, null
                , new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        if (isChecked) {
                            Toast.makeText(MainActivity.this, "" + single_item[which], Toast.LENGTH_LONG).show();
                        }
                    }
                });
        builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "退出", Toast.LENGTH_LONG).show();
                dialog.dismiss();
            }
        });
        builder.create().show();
    }

    /**
     * 自定義對話方塊
     *
     * @param view
     */
    public void show4(View view) {
        final String single_item[] = {"男", "女", "大一", "大二"};
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setIcon(R.mipmap.ic_launcher);
        builder.setTitle("對話方塊");
        //把佈局載入view
        View view1 = LayoutInflater.from(MainActivity.this).inflate(R.layout.item, null);
        builder.setView(view1);
        Button button = (Button) view1.findViewById(R.id.bt1);
        final AlertDialog dialog = builder.create();
        dialog.show();
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "退出", Toast.LENGTH_LONG).show();
                dialog.dismiss();
            }
        });
    }
}

執行結果就不給了，自己執行下就行了

本人剛剛學安卓，有錯誤不要噴