android AlertDialog控件使用

 

1、先创建activity_alert_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AlertDialogActivity">

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.08" />

    <Button
        android:id="@+id/button7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn5"
        app:layout_constraintBottom_toTopOf="@+id/guideline6"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline6" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.17920657" />

    <Button
        android:id="@+id/button9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn6"
        app:layout_constraintBottom_toTopOf="@+id/guideline7"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline7" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.30779755" />

    <Button
        android:id="@+id/button10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn7"
        app:layout_constraintBottom_toTopOf="@+id/guideline8"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline8" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.44" />

    <Button
        android:id="@+id/button11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn8"
        app:layout_constraintBottom_toTopOf="@+id/guideline9"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline9" />
</androidx.constraintlayout.widget.ConstraintLayout>

2、AlertDialogActivity.java

package com.example.myapplication;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class AlertDialogActivity extends AppCompatActivity {

    private Button btn7,btn9,btn10,btn11;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alert_dialog);

        btn7 = findViewById(R.id.button7);
        btn9 = findViewById(R.id.button9);
        btn10 = findViewById(R.id.button10);
        btn11 = findViewById(R.id.button11);

        btn7.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder bulder = new AlertDialog.Builder(AlertDialogActivity.this);

                bulder.setTitle("问卷调查").setIcon(R.drawable.p2).setMessage("感觉地球气温有上升吗？")
                        .setPositiveButton("没有", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                Toast.makeText(AlertDialogActivity.this, "气温没有上升", Toast.LENGTH_SHORT).show();
                            }
                        }).setNeutralButton("不知道", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Toast.makeText(AlertDialogActivity.this, "不知道", Toast.LENGTH_SHORT).show();

                    }
                }).setNegativeButton("上升好多", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Toast.makeText(AlertDialogActivity.this, "上升好多", Toast.LENGTH_SHORT).show();
                    }
                }).show();
            }
        });

        btn9.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder bulder = new AlertDialog.Builder(AlertDialogActivity.this);
                final String[] array = {"男","女"};
                bulder.setTitle("请选择性别").setItems(array, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Toast.makeText(AlertDialogActivity.this, array[i], Toast.LENGTH_SHORT).show();
                    }
                }).show();
            }
        });

        btn10.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder bulder = new AlertDialog.Builder(AlertDialogActivity.this);
                final String[] array = {"男","女"};
                bulder.setTitle("请选择性别").setSingleChoiceItems(array, 1, new DialogInterface.OnClickListener(){

                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Toast.makeText(AlertDialogActivity.this, array[i], Toast.LENGTH_SHORT).show();
                    }
                }).show();
            }
        });

        btn11.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder bulder = new AlertDialog.Builder(AlertDialogActivity.this);
                final String[] array = {"跳","唱","篮球","Rap"};
                final boolean[] isSelected = { true,false,false,false};
                bulder.setTitle("爱好").setMultiChoiceItems(array, isSelected, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i, boolean b) {
                        Toast.makeText(AlertDialogActivity.this, array[i]+b, Toast.LENGTH_SHORT).show();
                    }
                }).show();
            }
        });


    }
}

3、效果：