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Android对话框（一）AlertDialog
最近在做项目，小组几个回了家。界面暂时没人做，用到自定义对话框只能临时去学。现在把对话框的相关整理。
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.alertdialog.MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="显示AlertDialog对话框" />
<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:text="显示列表对话框" />
<Button
android:id="@+id/button3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/button2"
android:text="显示单选列表对话框" />
<Button
android:id="@+id/button4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/button3"
android:text="显示多选对话框" />
<Button
android:id="@+id/button5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/button4"
android:layout_centerHorizontal="true"
android:text="调用资源文件多选对话框" />
</RelativeLayout>
package com.example.alertdialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.view.View.OnClickListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button button1;
private Button button2;
private final CharSequence[] items = {"广州","深圳","上海","北京"};
private Button button3;
private Button button4;
private Button button5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button3 = (Button) findViewById(R.id.button3);
button4 = (Button) findViewById(R.id.button4);
button5 = (Button) findViewById(R.id.button5);
button1.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("提示");
builder.setMessage("你确定要删除吗!");
builder.setIcon(R.drawable.ic_launcher);
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int arg1) {
// 让对话框消失
dialog.dismiss();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
}
});
builder.setNeutralButton("忽略", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
//忽略用户操作，作用和取消一样
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
button2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("提示");
//不能设置setMessage的内容，不然会覆盖原来item的值
//在OnClickListener前要加DialogInterface，不然会报错
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int index) {
//item[index]不能转化为String,转化为CharSequence就行了
CharSequence select_item = items[index];
Toast.makeText(MainActivity.this, "你选择了城市"+select_item, 1).show();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
button3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("请选择以下城市");
builder.setIcon(R.drawable.ic_launcher);
/*
* 第一个参数：显示在对话框中供选择列表
* 第二个参数：默认选择的值，-1表示一个都没选
* 第三个参数：监听器
*/
builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
CharSequence select_item = items[which];
Toast.makeText(MainActivity.this, "-->>"+select_item, 1).show();
dialog.dismiss();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
button4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("请选择以下城市");
/*
* 第一个参数：供选择多选列表
* 第二个参数：boolean类型的数组，表示选中的项;如设置为null,表示没有选项默认被选中
* 第三个参数：不用说，监听器
*/
builder.setMultiChoiceItems(items, new boolean[]{false,false,true,false}, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1, boolean ischecked) {
// TODO Auto-generated method stub
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// 直接获取选择的值
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
//其实是button4的另一种写法
button5.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("请选择以下城市");
//获取选择值:使用StringBuffer追加，中间用逗号分隔开来
builder.setMultiChoiceItems(R.array.city, new boolean[]{false,false,true,false}, new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// 获取选择的值
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
}
}
Android对话框（一）AlertDialog
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