Android---Dialog

android中对话框种类有AlertDialog、DatePickerDialog（日期对话框）、TimePickerDialog（时间对话框）、ProgressDialog（进度条对话框）几种。

通过重写Acitivity的onCreateDialog(int id)函数，可以定制各种Dialog挂载在Activity上，当需要使用的时候直接通过this.showDialog(int id)即可。

 

Main.this.showDialog(0);

 在Activity里第一次show某个Dialog，则先调用onCreateDialog，得到返回的Dialog对象并挂靠在Activity，保存Dialog对象的引用，然后才显示Dialog。再次show Dialog就不用重新创建Dialog对象，而是直接使用之前的实例化对象（日期对话框、时间对话框明显体现）。

AlertDialog对话框较常用的属性设置和方法有setTitle、setMessage、setIcon、添加Yes/No按钮等等

 

builder= new AlertDialog.Builder(this);
            builder.setTitle("");
            builder.setMessage("Are you sure you want to exit?");
            builder.setPositiveButton("yes", new DialogInterface.OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    
                }
            });
            builder.setNegativeButton("no", new DialogInterface.OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
 　　　　　　　　　　　 //清除Dialog
                    dialog.dismiss();
                }
            });
            return builder.create();

 

使用自定义view的Dialog

 

//自定义的Dialog
            builder=new AlertDialog.Builder(this);
            LayoutInflater flater=LayoutInflater.from(this);
            final View view=flater.inflate(R.layout.login, null);//从xml中加载布局文件
            builder.setTitle("用户登录");
            builder.setView(view);
            builder.setPositiveButton("确定",new DialogInterface.OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    etname=(EditText)view.findViewById(R.id.etname);//在自定义的View对象中查找EditText
                    etpwd=(EditText)view.findViewById(R.id.etpwd);
                    String uname=etname.getText().toString();
                    String pwd=etpwd.getText().toString();
                    Toast.makeText(Main.this, "uanme:"+uname+",pwd:"+pwd, 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();//取消对话框
                }
            });
            return builder.create();

带list的AlertDialog（普通item/单选按钮/复选框）

 

 

builder=new AlertDialog.Builder(this);
            builder.setTitle("Item");
            final CharSequence[] items={"red","green","blue"};
//            dialog.setItems(R.array.ary, new DialogInterface.OnClickListener() {
//                
//                @Override
//                public void onClick(DialogInterface dialog, int which) {
//                    // TODO Auto-generated method stub
//                    String[] ary =   
//                        getResources().getStringArray(R.array.ary); //获得数组
//                    Toast.makeText(Main.this, ary[which], Toast.LENGTH_LONG).show();
//                }
//            });
            //
//            dialog.setItems(items, new DialogInterface.OnClickListener() {
//                
//                @Override
//                public void onClick(DialogInterface dialog, int which) {
//                    // TODO Auto-generated method stub
//                    Toast.makeText(Main.this, items[which], Toast.LENGTH_LONG).show();
//                }
//            });
            //单选按钮的列表
            builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(Main.this, items[which], Toast.LENGTH_LONG).show();
                    dialog.dismiss();
                }
            });
//            //复选框的列表
//            final boolean[] bls={true,true,true};
//            dialog.setMultiChoiceItems(items, bls, new DialogInterface.OnMultiChoiceClickListener() {
//                
//                @Override
//                public void onClick(DialogInterface dialog, int which, boolean isChecked) {
//                    // TODO Auto-generated method stub
//                    Toast.makeText(Main.this, items[which], Toast.LENGTH_LONG).show();
//                }
//            });
            return builder.create();

DatePickerDialog（日期对话框）、TimePickerDialog（时间对话框）、ProgressDialog（进度条对话框）

 

case 3:
            //带进度条的Dialog
            ProgressDialog pdlg=new ProgressDialog(this);
            pdlg.setMessage("Loading please wait .....");
            pdlg.setTitle("");
            pdlg.setCancelable(true);//设置是否可以取消对话框
            pdlg.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            return pdlg;
        case 4:
            //日期对话框
            Calendar c=Calendar.getInstance();
            Dialog dialog=new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
                
                @Override//
                public void onDateSet(DatePicker view, int year, int monthOfYear,
                        int dayOfMonth) {
                    // TODO Auto-generated method stub
                    Toast.makeText(Main.this, "year:"+String.valueOf(year)+";month:"+monthOfYear, Toast.LENGTH_LONG).show();
                }
            }, c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DATE));
            return dialog;
        case 5:
            //时间对话框
            //修改之后，再次打开对话框，显示的时间将是修改之后的值
            Calendar c1=Calendar.getInstance();
            Dialog tdlg=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
                
                @Override
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    // TODO Auto-generated method stub
                    Toast.makeText(Main.this, "hour:"+String.valueOf(hourOfDay)+";minute:"+minute, Toast.LENGTH_LONG).show();
                }
            },c1.get(Calendar.HOUR), c1.get(Calendar.MINUTE), true);
            return tdlg;