1 效果图
先看效果图：
2 概述
AlertDialog生成的对话框可分为4个区域：图标区，标题区，内容区，按钮区
结构如图：
AlertDialog的构造方法全部是Protected的，所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法。
AlertDialog对话框的使用步骤：
1，创建AlertDialog.Builder对象
2，调用Builder对象的setTitle()设置标题，setIcon设置图标
3，调用Builder对象的相关方法设置内容，AlertDialog提供如下设置指定对话框的内容：
setMessage()；设置简单文本框的内容
setItems()；设置简单列表的内容，数组
setSingleChoiceItems()；；设置单选列表的内容，内容参数可以是数组Cursor，ListAdapter
setMultiChoiceItems()；设置多选列表项的内容，内容参数可以是数组，Cursor
setAdapter();设置内容，内容是ListAdapter，常用的BaseAdapter，SimpleAdapter，ArrayAdapter
setView();设置内容，参数是自定义的View
setItems ：设置对话框要显示的一个list，一般用于显示几个命令时
4，调用Builder对象的setPositiveButton()和 setNegativeButton()设置按钮和监听器
5，调用Builder对象的create()方法创建AlertDialog对象，再调用AlertDialog对象的show()方法显示对话框
总之：调用Builder对象设置图标，标题，内容，按钮，在create()，show()
2 概述
3 例子代码
java代码
package mm.shandong.com.testalertdialog;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Toast;
import java.lang.reflect.Field;
import java.util.ArrayList;
public class TestAlertDialogActivity extends AppCompatActivity {
String nav_name = "AlertDialog";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_alert_dialog);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setTitle(nav_name + " demo");
}
///显示普通对话框
public void showNomalDialog(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("普通对话框");
builder.setIcon(R.drawable.head1);
builder.setMessage("对话框文本内容");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(TestAlertDialogActivity.this,
"您点击的是确定按钮",
Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(TestAlertDialogActivity.this,
"您点击的是取消按钮",
Toast.LENGTH_SHORT).show();
}
});
builder.create().show();
}
显示列表对话框
public void showListDialog(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("列表对话框");
builder.setIcon(R.drawable.head2);
final String[] arrayRegion = getResources().
getStringArray(R.array.arrayRegion);
builder.setItems(arrayRegion, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int position) {
Toast.makeText(TestAlertDialogActivity.this,
arrayRegion[position], Toast.LENGTH_SHORT).show();
}
});
builder.create().show();
}
///显示有单选按钮的对话框
public void showSingleListDialog(View view) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("单选列表对话框");
builder.setIcon(R.drawable.head2);
final String[] arrayRegion = getResources().getStringArray(R.array.arrayRegion);
builder.setSingleChoiceItems(arrayRegion,1,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int position) {
Toast.makeText(TestAlertDialogActivity.this,
arrayRegion[position], Toast.LENGTH_SHORT).show();
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
AlertDialog alertDialog = (AlertDialog) dialogInterface;
int sp = alertDialog.getListView().getCheckedItemPosition();
String str = (String) alertDialog.getListView().getItemAtPosition(sp);
Toast.makeText(TestAlertDialogActivity.this,
str, Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(TestAlertDialogActivity.this,
"您点击的是取消按钮", Toast.LENGTH_SHORT).show();
}
});
builder.create().show();
}
///显示有多选按钮的对话框
public void showMultiListDialog(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("多选列表对话框");
builder.setIcon(R.drawable.head2);
final String[] arrayRegion = getResources().getStringArray(R.array.arrayRegion);
final boolean[] selectItems = new boolean[arrayRegion.length];
for (int i = 0; i < arrayRegion.length; i++) {
selectItems[i] = false;
}
builder.setMultiChoiceItems(arrayRegion, selectItems,
new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i,boolean b) {
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int position) {
String str = "";
for (int i = 0; i < arrayRegion.length; i++) {
if (selectItems[i]) {
str += arrayRegion[i] + " ";
}
}
Toast.makeText(TestAlertDialogActivity.this, str,
Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(TestAlertDialogActivity.this,
"您点击的是取消按钮", Toast.LENGTH_SHORT).show();
}
});
builder.create().show();
}
///显示设置arrayAdpater的对话框
public void showAdapterListDialog(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Adapter对话框");
builder.setIcon(R.drawable.head2);
final String[] arrayRegion = getResources().
getStringArray(R.array.arrayRegion);
ArrayAdapter arrayAdapter = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, arrayRegion);
builder.setAdapter(arrayAdapter, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
builder.create().show();
}
///显示自定义view的对话框
public void showViewDialog(View view) {
View view2 = getLayoutInflater().
inflate(R.layout.item_testalertdialog_alertdialog, null);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("自定义View对话框");
builder.setIcon(R.drawable.head2);
builder.setView(view2);
builder.setPositiveButton("提交", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int position) {
Toast.makeText(TestAlertDialogActivity.this,
"点击提交按钮", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(TestAlertDialogActivity.this,
"您点击的是取消按钮", Toast.LENGTH_SHORT).show();
}
});
builder.create().show();
}
///显示对输入表单进行验证的对话框，如果不合法不允许关闭对话框
public void showNoClosedDialog(View view) {
View view2 = getLayoutInflater().
inflate(R.layout.item_testalertdialog_alertdialog, null);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("自定义View对话框");
builder.setIcon(R.drawable.head2);
builder.setView(view2);
final EditText et_name = (EditText) view2.findViewById(R.id.et_name);
final EditText et_phone = (EditText) view2.findViewById(R.id.et_phone);
builder.setPositiveButton("提交", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int position) {
AlertDialog alertDialog = (AlertDialog) dialogInterface;
Field field = null;
try {
field = dialogInterface.getClass().
getSuperclass().getDeclaredField("mShowing");
field.setAccessible(true);
field.set(dialogInterface, false);
} catch (Exception e) {
e.printStackTrace();
}
if (TextUtils.isEmpty(et_name.getText().toString()) ||
TextUtils.isEmpty(et_phone.getText().toString())) {
Toast.makeText(TestAlertDialogActivity.this,
"姓名或手机号不能为空", Toast.LENGTH_SHORT).show();
} else {
try {
field.set(dialogInterface, true);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
// dialogInterface.dismiss();
}
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Field field = null;
try {
field = dialogInterface.getClass().getSuperclass().
getDeclaredField("mShowing");
field.setAccessible(true);
field.set(dialogInterface, true);
dialogInterface.dismiss();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
});
builder.create().show();
}
}
主界面布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showNomalDialog"
android:text="普通对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showListDialog"
android:text="简单列表对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showSingleListDialog"
android:text="单选列表对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showMultiListDialog"
android:text="多选列表对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showAdapterListDialog"
android:text="Adapter列表对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showViewDialog"
android:text="自定义View对话框" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showNoClosedDialog"
android:text="点击确定按钮不关闭对话框" />
</LinearLayout>
自定义对话框view布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TableLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:stretchColumns="1">
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="用户名"
android:textSize="17sp" />
<EditText
android:id="@+id/et_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入用户名"
android:selectAllOnFocus="true"
android:textColorHint="#238745" />
</TableRow>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密码"
android:textSize="17sp" />
<EditText
android:id="@+id/et_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入密码"
android:inputType="textPassword"
android:selectAllOnFocus="true" />
</TableRow>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="年龄"
android:textSize="17sp" />
<EditText
android:id="@+id/et_age"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入年龄"
android:inputType="number"
android:selectAllOnFocus="true" />
</TableRow>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="生日"
android:textSize="17sp" />
<EditText
android:id="@+id/et_birthday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入生日"
android:inputType="date"
android:selectAllOnFocus="true" />
</TableRow>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="手机"
android:textSize="17sp" />
<EditText
android:id="@+id/et_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入手机号"
android:inputType="phone"
android:selectAllOnFocus="true" />
</TableRow>
</TableLayout>
</LinearLayout>
4 Demo下载
本人微博：honey_11
最后，以上例子都来源与安卓无忧，请去应用宝或者豌豆荚下载：源码下载，源码例子文档一网打尽。例子源码，百度网盘地址：
http://pan.baidu.com/s/1cn7v58
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