Dialog

AlertDialog常用方法

• 要创建一个AlertDialog对话框，就要用到AlertDialog.Builder中的create()方法

  AlertDialog dialog=builder.create();//获取dialog
  dialog.show();//显示对话框
  dialog.dismiss();//关闭对话框

• setTitle：为对话框设置标题
• setIcon：为对话框设置图标
• setMessage：为对话框设置内容
• setView：给对话框设置自定义样式
• setItems：设置对话框要显示的一个list，一般用于显示几个命令时
• setMultiChoiceItems：用来设置对话框显示一系列的复选框
• setSingleChoiceItems：设置单选按钮
• setNeutralButton：普通按钮
• setPositiveButton：给对话框添加“确认”按钮

• setNegativeButton：对话框添加“取消”按钮

  实例代码

MainActivity.java代码：

package com.example.dialog;

import android.R.integer;
import android.support.v7.app.ActionBarActivity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
    //单选对话框所用数组
    String[] single_list={"男","女","女博士","程序员"};

    //多选对话框所用数组
    String[] Multi_list={"篮球","足球","男生","女生"};

    //列表对话框使用数组
    String[] item_list={"项目经理","策划","测试","美工","程序员"};   

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

    /*
     * 初始化点击事件
     * 
     * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
     */
    public void initEvent(){
        findViewById(R.id.button1).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog1();      
            }
        });
        findViewById(R.id.button2).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            showDialog2();      
            }   
        });
        findViewById(R.id.button3).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog3();      
            }   
     });
        findViewById(R.id.button4).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog4();      
            }           
         });
        findViewById(R.id.button5).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog5();      
            }   
     });
    }
    /*
     * 显示确认对话框
     * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)
     */
    public void showDialog1() {
        //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("确认对话框");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setMessage("确认的对话框提示内容");
        builder.setPositiveButton("确认", new android.content.DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                Toast.makeText(MainActivity.this, "点击了确定按钮", 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, "点击了取消按钮", Toast.LENGTH_SHORT).show();
        }
    });
    AlertDialog dialog=builder.create();
    dialog.show();//显示对话框


    }

    public void showDialog2() {
        //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("选择性别");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setSingleChoiceItems(single_list, 0, new DialogInterface.OnClickListener() {
            //第一个参数为数组，0代表第一个选中，第三参数为点击事件监听器
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                //which是单选按钮选择的是哪一个
                String str=single_list[which];
                Toast.makeText(MainActivity.this, "这个人是"+str+"!", Toast.LENGTH_SHORT).show();
            }
        });
    AlertDialog dialog=builder.create();
    dialog.show();//显示对话框
    }

    public void showDialog3() {
        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("爱好");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setMultiChoiceItems(Multi_list, null, new DialogInterface.OnMultiChoiceClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                // TODO Auto-generated method stub
                if(isChecked){
                    Toast.makeText(MainActivity.this, "我喜欢上了"+Multi_list[which]+"!", Toast.LENGTH_SHORT).show();
                }else {
                    Toast.makeText(MainActivity.this, "我不喜欢"+Multi_list[which]+"!", Toast.LENGTH_SHORT).show();
                }
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }
        });
        AlertDialog dialog=builder.create();
        dialog.show();//显示对话框
    }
    /*
     * 显示列表对话框
     */
    public void showDialog4() {
        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("部门列表");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setItems(item_list, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                Toast.makeText(MainActivity.this, "我动了"+item_list[which]+"!", Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();//关闭对话框
            }
        });
        AlertDialog dialog=builder.create();//获取dialog
        dialog.show();//显示对话框
    }
    @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;
    }

    public void showDialog5() {
        //LayoutInflater是用来找res/layout/下的xml布局文件，并且实例化
        LayoutInflater inflater=LayoutInflater.from(this);
        View view=inflater.inflate(R.layout.dialog_layout, null);

        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("自定义显示对话框");
        builder.setIcon(R.drawable.ic_launcher);
        builder.setView(view);//设置自定义样式布局
        AlertDialog dialog=builder.create();
        dialog.show();//显示对话框
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

activity_main.xml布局文件代码：

<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="com.example.dialog.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="确认对话框" />

    <Button
        android:id="@+id/button2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="37dp"
        android:text="单选按钮对话框" />

    <Button
        android:id="@+id/button3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button2"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="39dp"
        android:text="多选对话框" />

    <Button
        android:id="@+id/button4"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button3"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="25dp"
        android:text="列表对话框" />

    <Button
        android:id="@+id/button5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button4"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="33dp"
        android:text="自定义对话框" />

</RelativeLayout>

dialog_layout.xml自定义布局文件代码：

<?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" >

   <LinearLayout 
         android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
        >
       <EditText
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:id="@+id/editText1"
           android:text="请输入内容..."
           android:layout_weight="1"

           />
       <Button
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="提交"
           android:layout_marginLeft="10dip"
           />
      </LinearLayout>
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/on"

        />
</LinearLayout>