Android学习之Dialog

在Android开发中，我们经常会需要在Android界面上弹出一些对话框，比如询问用户或者让用户选择。这些功能我们叫它Android Dialog对话框;

实例如下：

1.效果图：

 

2.XML代码：

<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=".MainActivity" >
    
    
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="信息提示框" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:text="弹出单选按钮框" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button2"
        android:layout_below="@+id/button2"
        android:text="弹出多选按钮框" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button3"
        android:layout_below="@+id/button3"
        android:text="弹出一组列表框" />

    <Button
        android:id="@+id/button5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button4"
        android:layout_below="@+id/button4"
        android:text="弹出进度条框" />

    <Button
        android:id="@+id/button6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button5"
        android:layout_below="@+id/button5"
        android:text="自定义布局框" />

</RelativeLayout>

3.java代码：

package com.example.alertdilog;

import android.app.Activity;
import android.app.Dialog;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import android.os.Bundle;

public class MainActivity extends Activity implements OnClickListener {

    private Button Buttton1;
    private Button Buttton2;
    private Button Buttton3;
    private Button Buttton4;
    private Button Buttton5;
    private Button Buttton6;


    private EditText mUserNamEditText;
    private EditText mPwdEditText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();

    }

    private void initView() {
        Buttton1 = (Button) this.findViewById(R.id.button1);
        Buttton2 = (Button) this.findViewById(R.id.button2);
        Buttton3 = (Button) this.findViewById(R.id.button3);
        Buttton4 = (Button) this.findViewById(R.id.button4);
        Buttton5 = (Button) this.findViewById(R.id.button5);
        Buttton6 = (Button) this.findViewById(R.id.button6);

        
        Buttton1.setOnClickListener(this);
        Buttton2.setOnClickListener(this);
        Buttton3.setOnClickListener(this);
        Buttton4.setOnClickListener(this);
        Buttton5.setOnClickListener(this);
        Buttton6.setOnClickListener(this);
    }

    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
        case R.id.button1: // 信息提示框
            AlertDialog();
            break;
        case R.id.button2:
            AlertRadioDialog(); // 弹出单选按钮
            break;
        case R.id.button3:
            AlertCheckBoxDialog();
            break;
        case R.id.button4:
            AlertListDialog();
            break;
        case R.id.button5:
            AlertProgressDialog();
            break;
        case R.id.button6:
            AlertziDialog();
            break;

        default:
            break;
        }
    }

    private void AlertziDialog() {
        // 动态加载布局生成View对象
        LayoutInflater layoutInflater = LayoutInflater.from(MainActivity.this);
        View view = layoutInflater.inflate(R.layout.login_alert, null);
        mUserNamEditText = (EditText) view.findViewById(R.id.edit_username);
        mPwdEditText = (EditText) view.findViewById(R.id.edit_password);

        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("登陆");
        builder.setIcon(R.drawable.ic_launcher).create();
        builder.setView(view);
        builder.setPositiveButton("确定", null);
        builder.setNegativeButton("取消", null);
        builder.show();
    }

    private void AlertListDialog() {
        // 指定下拉列表的显示数据
        final String[] cities = { "广州", "上海", "北京", "香港", "澳门", "深圳", "天津",
                "武汉", "兰州", "长沙", "重庆", "西安", "成都", "安徽" };
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setIcon(R.drawable.ic_launcher);
        builder.setTitle("选择一个城市");
        // 设置一个下拉的列表选择项
        builder.setItems(cities, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "选择的城市为：" + cities[which],
                        Toast.LENGTH_SHORT).show();
            }
        });
        builder.show();
    }

    private void AlertRadioDialog() {
        final String[] sex = { "男", "女", "保密" };
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("请选择性别");
        builder.setIcon(android.R.drawable.ic_dialog_info).create();
        builder.setSingleChoiceItems(sex, 0,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "选择的是：" + sex[which],
                                Toast.LENGTH_SHORT).show();
                        dialog.dismiss();
                    }
                });
        builder.setNegativeButton("取消", null);
        builder.show();
    }

    private void AlertCheckBoxDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("请选择爱好");
        builder.setIcon(R.drawable.ic_launcher).create();
        builder.setMultiChoiceItems(new String[] { "打球", "谈朋友", "看小说", "写代码" },
                null, null);
        builder.setPositiveButton("确定", null);
        builder.setNegativeButton("取消", null);
        builder.show();
    }

    private void AlertDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("信息提示");
        builder.setMessage("删除后不能回复，确认要删除吗？");
        builder.setIcon(R.drawable.ic_launcher).create();
        builder.setPositiveButton("确认", new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                MainActivity.this.finish();
            }
        });
        builder.setNegativeButton("取消", new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        builder.show();
    }

    private void AlertProgressDialog() {
        ProgressDialog mypDialog = new ProgressDialog(MainActivity.this);
        // 设置ProgressDialog 标题
        mypDialog.setTitle("信息提示框");
        // 设置ProgressDialog 提示信息
        mypDialog.setMessage("Loading..........");
        // 设置ProgressDialog 标题图标
        mypDialog.setIcon(R.drawable.ic_launcher);
        // 设置ProgressDialog 进度条进度
        mypDialog.setProgress(59);
        // 设置ProgressDialog 的进度条是否不明确
        mypDialog.setIndeterminate(true);
        // 设置ProgressDialog 是否可以按退回按键取消
        mypDialog.setCancelable(true);
        // 显示出来来
        mypDialog.show();
    }

}