Android AlertDialog的几种用法详解

 package com.example.lesson7_3_id19_alertdialog; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ArrayAdapter; import android.widget.EditText; 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 dialog_1(View v){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher_round); builder.setTitle("标题栏"); builder.setMessage("正文部分，简单的文本"); builder.setPositiveButton("确定",new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "点击了确定", Toast.LENGTH_SHORT).show(); } }); builder.setNegativeButton("取消",null); builder.setNeutralButton("中立",null); AlertDialog alertDialog = builder.create(); alertDialog.show(); } private String [] item = {"游戏","运动","电影","旅游","看书"}; public void dialog_2(View v){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("请选择"); builder.setItems(item, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "选择了"+item[which], Toast.LENGTH_SHORT).show(); } }); // 取消可以不添加 //builder.setNegativeButton("取消",null); AlertDialog alertDialog = builder.create(); alertDialog.show(); } int index; public void dialog_3(View v){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("请选择"); builder.setSingleChoiceItems(item, index, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { index = which; } }); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "选择了"+item[index], Toast.LENGTH_SHORT).show(); } }); builder.setNegativeButton("取消",null); AlertDialog alertDialog = builder.create(); alertDialog.show(); } // 设置boolean数组所有的选项设置默认没选 boolean[] bools = {false,false,false,false,false}; public void dialog_4(View v){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("请选择"); builder.setMultiChoiceItems(item, bools, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { bools[which] = isChecked; } }); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { StringBuffer sb = new StringBuffer(); for (int i = 0; i  adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,item); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("使用适配器"); builder.setAdapter(adapter, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "选择了"+item[which], Toast.LENGTH_SHORT).show(); } }); AlertDialog alertDialog = builder.create(); alertDialog.show(); } }