Android 对话框 Dialog使用实例讲解

对话框 Dialog

什么是对话框

对话框是在当前的页面之上弹出的小窗口, 用于显示一些重要的提示信息, 提示用户的输入,确认信息,或显示某种状态.如 : 显示进度条对话框, 退出提示.

对话框的特点:

1, 当前界面弹出的小窗口.

2, 用户要与它进行交互, 可以接收用户输入的信息, 也可以反馈信息给用户.

常用对话框:

1, 普通对话框 AlertDialog

2, 进度条对话框 ProgressDialog

3, 日期对话框 DatePickerDialog

4, 时间对话框 TimePickerDialog

5, 自定义对话框

常用普通对话框 AlertDialog

1, 普通列表对话框 setItems -- onClickListener

2, 单选对话框 setSingleChoiceItems -- onClickListener

3, 多选对话框 setMultiChoiceItems --- > onMultiChoiceClickListener

4, 适配器对话框 setAdapter -- onClickListener

package com.qf.day11_dialog_01; 
import java.util.Calendar; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.DatePickerDialog; 
import android.app.DatePickerDialog.OnDateSetListener; 
import android.app.ProgressDialog; 
import android.app.TimePickerDialog; 
import android.app.TimePickerDialog.OnTimeSetListener; 
import android.content.DialogInterface; 
import android.content.DialogInterface.OnClickListener; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.DatePicker; 
import android.widget.EditText; 
import android.widget.TimePicker; 
import android.widget.Toast; 
public class MainActivity extends Activity { 
private EditText name; 
private EditText pwd; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
} 
public void showAlertDialog(View v) 
{ 
//1, 定义普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); 
//2, 构建对话框 
builder.setIcon(R.drawable.img_23);//设置图标 
builder.setTitle("提示");//设置标题 
builder.setMessage("是否确认退出?");//设置内容 
//设置取消按钮 
 
builder.setNegativeButton("取消", null); 
//设置确定按钮 
builder.setPositiveButton("确定", new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
finish(); 
} 
}); 
//3, 显示对话框 
builder.show(); 
} 
public void showProgressDialog(View v) 
{ 
//1, 得到ProgressDialog的对象 
ProgressDialog pDialog = new ProgressDialog(this); 
//2, 构建对话框 
pDialog.setIcon(R.drawable.img_14); 
pDialog.setTitle("提示"); 
pDialog.setMessage("正在加载, 请稍后...."); 
pDialog.setCancelable(true);//是否可撤销 true 可以 false 不可以 
//设置进度条对话框的样式 
//ProgressDialog.STYLE_HORIZONTAL 水平的 
//ProgressDialog.STYLE_SPINNER 转圈的 
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); 
//3, 显示对话框 
pDialog.show(); 
//pDialog.dismiss();//对话框消失 
pDialog.setProgress(50);//设置进度值, 在显示对话后,才可以设置 
} 
public void showDatePickerDialog(View v) 
{ 
//获取系统的当前日期 
Calendar calendar = Calendar.getInstance(); 
int year = calendar.get(Calendar.YEAR); 
int monthOfYear = calendar.get(Calendar.MONTH); 
int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH); 
//1, 创建带有日期选择器的对话框 
 
DatePickerDialog dPDialog = new DatePickerDialog(this,new OnDateSetListener() { 
 
@Override 
public void onDateSet(DatePicker view, int year, int monthOfYear, 
int dayOfMonth) { 
//选择后的日期监听 
Toast.makeText(MainActivity.this, year+"-"+(monthOfYear+1)+"-"+dayOfMonth, Toast.LENGTH_SHORT).show(); 
} 
}, year, monthOfYear, dayOfMonth); 
//2, 显示对话框 
dPDialog.show(); 
} 
public void showTimePickerDialog(View v) 
{ 
//1, 创建带有时间选择器的对话框 
 
TimePickerDialog tpDialog = new TimePickerDialog(this, new OnTimeSetListener() { 
@Override 
public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
Toast.makeText(MainActivity.this, hourOfDay + " :" + minute, Toast.LENGTH_SHORT).show(); 
} 
}, 15, 17, true); 
//2, 显示对话框 
tpDialog.show(); 
} 
//自定义对话框(在普通对话框基础上实现) 
public void showCustomDialog(View v) 
{ 
//1, 得到普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(this); 
//2, 构建对话框 
builder.setIcon(R.drawable.img_23); 
builder.setTitle("用户登陆"); 
//3, 为对话框设置自定义的视图 
View view = getLayoutInflater().inflate(R.layout.login, null); 
name = (EditText) view.findViewById(R.id.name); 
pwd = (EditText) view.findViewById(R.id.pwd); 
builder.setView(view); 
//为对话框添加 按钮 
builder.setNegativeButton("取消", null); 
builder.setPositiveButton("登陆", new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
String info = name.getText().toString()+", "+ pwd.getText().toString(); 
Toast.makeText(MainActivity.this, info, Toast.LENGTH_SHORT).show(); 
} 
}); 
//4, 显示对话框 
builder.show(); 
} 
} 

package com.qf.day11_dialog_02; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.DialogInterface.OnClickListener; 
import android.content.DialogInterface.OnMultiChoiceClickListener; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 
public class MainActivity extends Activity { 
private TextView tv; 
private int position;//单选列表的 中间转接 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
tv = (TextView) findViewById(R.id.tv); 
} 
//普通列表对话框 
public void showCommon(View v) 
{ 
//1, 得到普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(this); 
builder.setIcon(R.drawable.ic_launcher); 
builder.setTitle("选择颜色"); 
//2, 设置列表 
//getResources().getStringArray(id) 
builder.setItems(R.array.colors, new OnClickListener() { 
 
@Override 
public void onClick(DialogInterface dialog, int which) { 
switch (which) { 
case 0: 
tv.setTextColor(Color.RED); 
break; 
case 1: 
tv.setTextColor(Color.GREEN); 
break; 
case 2: 
tv.setTextColor(Color.BLUE); 
break; 
} 
} 
}); 
//3, 显示对话框 
builder.show(); 
} 
//单选列表 
public void showSingle(View v) 
{ 
//1, 得到普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(this); 
builder.setIcon(R.drawable.ic_launcher); 
builder.setTitle("设置文字大小"); 
//2, 设置单选列表 
 
builder.setSingleChoiceItems(R.array.sizes, -1, new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
// 把当前选中的Item的下标 赋值给全局的变量 position 
position = which; 
} 
}); 
builder.setPositiveButton("确定", new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
// TODO 根据全局的position 判断该执行什么样的操作 
switch (position) { 
case 0: 
tv.setTextSize(20); 
break; 
case 1: 
tv.setTextSize(30); 
break; 
case 2: 
tv.setTextSize(40); 
break; 
} 
} 
}); 
//3, 显示对话框 
builder.show(); 
} 
//多选列表 
public void showMulti(View v) 
{ 
//1, 得到普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(this); 
builder.setIcon(R.drawable.ic_launcher); 
builder.setTitle("设置内容"); 
//2, 设置多选列表 
 
//得到所有的数据 
final String[] hobbys = getResources().getStringArray(R.array.hobbys); 
//选中的Item 
final boolean[] checkedItems = new boolean[hobbys.length]; 
builder.setMultiChoiceItems(R.array.hobbys, checkedItems, new OnMultiChoiceClickListener() { 
 
@Override 
public void onClick(DialogInterface dialog, int which, boolean isChecked) { 
//改变boolean[] 中状态 
checkedItems[which] = isChecked; 
} 
}); 
builder.setPositiveButton("确定", new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
StringBuilder sBuilder = new StringBuilder(); 
for(int i=0;i<checkedItems.length;i++) 
{ 
if(checkedItems[i]) 
{ 
sBuilder.append(hobbys[i]).append(" "); 
} 
} 
tv.setText(sBuilder.toString()); 
} 
}); 
//3, 显示对话框 
builder.show(); 
} 
//适配器列表 
public void showAdapter(View v) 
{ 
//1, 得到普通对话框的构建者 
AlertDialog.Builder builder = new AlertDialog.Builder(this); 
builder.setIcon(R.drawable.ic_launcher); 
builder.setTitle("选择设置"); 
//2, 设置适配器 
String[] data = getResources().getStringArray(R.array.settings); 
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
android.R.layout.simple_list_item_1, 
data); 
builder.setAdapter(adapter, new OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
Intent intent = new Intent(); 
switch (which) { 
case 0: 
intent.setAction("android.settings.WIFI_SETTINGS"); 
break; 
case 1: 
intent.setAction("android.settings.SOUND_SETTINGS"); 
break; 
case 2: 
intent.setAction("android.settings.SETTINGS"); 
break; 
} 
startActivity(intent); 
} 
}); 
//3, 显示对话框 
//builder.show(); 
builder.create().show(); 
} 
} 

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