Android(安卓)Dialog种类大全，让Activity显示在另外一个Activity之上

AlertDialog(对话框)---简单对话框:

AlertDialog生成的对话框可以分为四个区域

图标区，标题区，内容区，按钮区步骤：1、创建AlertDialog.Builder对象 2、调用AlertDialog.Builder的setTitle设置标题 3、调用AlertDialog.Builder的setIcon方法设置图片 4、AlertDialog.Builder的setMessage设置内容 5、调用AlertDialog.Builder的 setPositiveButton设置确定按钮, setNegativeButton设置取消按钮 6、调用AlertDialog.Builder的show方法
简单alertDialog

import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.View;import android.widget.Toast;import com.example.android_lb_day4_ui.R;public class AletDialogTest extends Activity {       @Override       protected void onCreate(Bundle savedInstanceState) {             // TODO Auto-generated method stub             super.onCreate(savedInstanceState);            setContentView(R.layout. activity_alertdialog);      }       public void simple(View v) {            AlertDialog.Builder bulider = new AlertDialog.Builder(this);            bulider.setTitle( "简单对话框" ); // 设置标题            bulider.setIcon(R.drawable. ic_launcher); // 设置标题左边的图片            bulider.setMessage( "对话框测试内容\n第二行内容" ); // 设置显示的消息            bulider.setPositiveButton( "确定", new OnClickListener() {                   @Override                   public void onClick(DialogInterface dialog, int which) {                         // TODO Auto-generated method stub                        Toast. makeText(getApplicationContext(), "确定",                                    Toast. LENGTH_SHORT).show();                  }            });            bulider. setNegativeButton("取消", new OnClickListener() {                   @Override                   public void onClick(DialogInterface dialog, int which) {                         // TODO Auto-generated method stub                        Toast. makeText(getApplicationContext(), "取消",                                    Toast. LENGTH_SHORT).show();                  }            });            bulider.show();      }}

       // 消息对话框         public void simple(View v) {             AlertDialog.Builder bulider = new AlertDialog.Builder( this );             bulider.setTitle( "简单消息对话框" ); // 设置标题             bulider.setIcon(R.drawable. ic_launcher ); // 设置标题左边的图片             bulider.setMessage( "简单消息提示框...\n第二行的消息" );             setPositiveButton(bulider);             setNegativeButton(bulider);             bulider.show();       }
       // 列表对话框         public void simpleList(View v) {             AlertDialog.Builder bulider = new AlertDialog.Builder( this );             bulider.setTitle( "简单列表对话框" ); // 设置标题             bulider.setIcon(R.drawable. ic_launcher ); // 设置标题左边的图片             bulider.setItems( items, new OnClickListener() {
                   @Override                    public void onClick(DialogInterface dialog, int which) {                          // TODO Auto-generated method stub                         Toast. makeText(getApplicationContext(), items[which],                                     Toast. LENGTH_SHORT).show();                   }             });             setPositiveButton(bulider);             setNegativeButton(bulider);             bulider.show();       }
       // 单选列表对话框         public void singleSelect(View v) {             AlertDialog.Builder bulider = new AlertDialog.Builder( this );             bulider.setTitle( "单选列表对话框" ); // 设置标题             bulider.setIcon(R.drawable. ic_launcher ); // 设置标题左边的图片             bulider.setSingleChoiceItems( items , 1, new OnClickListener() {                                        @Override                     public void onClick(DialogInterface dialog, int which) {                         Toast. makeText(getApplicationContext(), items [which],                                     Toast. LENGTH_SHORT ).show();                                            }             });             setPositiveButton(bulider);             setNegativeButton(bulider);             bulider.show();
      }        //多选列表对话框         public void mulSelect(View v){             AlertDialog.Builder bulider = new AlertDialog.Builder( this );             bulider.setTitle( "单选列表对话框" ); // 设置标题             bulider.setIcon(R.drawable. ic_launcher ); // 设置标题左边的图片             bulider.setMultiChoiceItems( items , new boolean []{ false }, null );             setPositiveButton(bulider);             setNegativeButton(bulider);             bulider.show();
                   }
    // 设置确定按钮         public AlertDialog.Builder setPositiveButton(AlertDialog.Builder bulider) {               return bulider.setPositiveButton( "确定" , new OnClickListener() {
                    @Override                     public void onClick(DialogInterface dialog, int which) {                           // TODO Auto-generated method stub                         Toast. makeText(getApplicationContext(), "确定" ,                                     Toast. LENGTH_SHORT ).show();                   }             });       }
        // 设置取消按钮         public AlertDialog.Builder setNegativeButton(AlertDialog.Builder bulider) {               return bulider.setNegativeButton( "取消" , new OnClickListener() {
                    @Override                     public void onClick(DialogInterface dialog, int which) {                           // TODO Auto-generated method stub                         Toast. makeText(getApplicationContext(), "取消" ,                                     Toast. LENGTH_SHORT ).show();                   }             });       }

DatePickerDialog、TimePickerDialog使用：

只要通过new 关键字创建DatePickerDialog、TimePickerDialog的实例，调用他们的show()方法即可

DatePickerDialog的监听器：new DatePickerDialog.OnDateSetListener(){}; TimePickerDialog的监听器：newTimePickerDialog.OnTimeSetListener(){};

那么如何将Activity悬浮在另外一个Activity上面？答案很简单：

只要把显示的activity设定为窗口即可

在AndroidMainFest.xml文件中配置： 在

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