今天就跟大家聊聊有关在Android应用中使用AlertDialog对话框可以实现哪些功能,可能很多人都不太了解,为了让大家更加了解,小编给大家总结了以下内容,希望大家根据这篇文章可以有所收获。
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AlertDialog的常用方法
setTitle:为对话框设置标题
setMessage:为对话框设置内容
setIcon:为对话框设置图标
setItems设置对话框要显示的list
setMultiChoiceItems:一般用于复选框显示
setSingleChoiceItem:,设置单选按钮
setNeutralButton:普通按钮
setPositiveButton:添加确定按钮
setNegativeButton:添加取消按钮
setView:设置自定义样式
下面通过一个实例来了解这些方法
MainActivity.class
package com.example.alertdialog; import android.R.bool; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.Dialog; import android.content.DialogInterface; import android.content.pm.LabeledIntent; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; private int mark=0; private String item[] = { "学生", "工人", "教师", "农民" }; private String multChoice[]={"旅游","电影","运动","读书"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.btn_button1); button2 = (Button) findViewById(R.id.btn_button2); button3 = (Button) findViewById(R.id.btn_button3); button4 = (Button) findViewById(R.id.btn_button4); button5 = (Button) findViewById(R.id.btn_button5); button1.setOnClickListener(this); button2.setOnClickListener(this); button3.setOnClickListener(this); button4.setOnClickListener(this); button5.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { //确认对话框 case R.id.btn_button1: { AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("确认对话框"); builder.setMessage("确认退出?"); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你单击了确定按钮", Toast.LENGTH_SHORT).show(); } }); builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你单击了取消按钮", Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //列表对话框 case R.id.btn_button2: { AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("职业"); builder.setItems(item, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你的职业是" + item[which], Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //多选对话框 case R.id.btn_button3: { final boolean choose[]=new boolean[multChoice.length]; AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("爱好"); builder.setMultiChoiceItems(multChoice, null, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { // TODO Auto-generated method stub choose[which]=isChecked; } }); builder.setPositiveButton("确认", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub String result=""; for(int i=0;i
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