Android开发（19）---常见dialog对话框的运用

Dialog是android开发过程中最常用到的组件之一，Dialog的创立办法有两种：
一是直接new一个Dialog目标，然后调用Dialog目标的show和dismiss办法来操控对话框的显现和躲藏。
二是在Activity的onCreateDialog(int id)办法中创立Dialog目标并回来，然后调用Activty的showDialog(int id)和dismissDialog(int id)来显现和躲藏对话框。

差异在于经过第二种办法创立的对话框会承继Activity的特点，比方取得Activity的menu事情等。下面案例主要介绍第一种。

1.最简单的对话框

布局文件：

就一个Button按钮

<Button        android:id="@+id/button1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="79dp"         android:onClick="openDialog"        android:text="打开对话框" />

MainActivity.java

package com.example.lesson16_dialog;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {private Handler handler;private int progress;private static final int MAX_PROGRESS=100;private static final int PRO=10;private ProgressDialog progressDialog;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@SuppressWarnings("deprecation")public void openDialog(View v) {test1();/*tes2();tes3();tes4();tes5();tes6();test7();myDialog();*/}public void test1() {// 创建对话框对象AlertDialog alertDialog = new AlertDialog.Builder(this).create();// 设置对话框的标题alertDialog.setTitle("这是一个消息对话框");// 设置对话框中的内容alertDialog.setMessage("消息");// 显示对话框alertDialog.show();}public void tes2() {AlertDialog alertDialog = new AlertDialog.Builder(this).setTitle("哈哈").setMessage("什么都没有").show();}public void tes3() {new AlertDialog.Builder(this).setIcon(R.drawable.ic_launcher).setTitle("对话框").setMessage("是否创建文件").setPositiveButton("确认", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 创建文件了new AlertDialog.Builder(MainActivity.this).setMessage("文件已经被创建").show();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {new AlertDialog.Builder(MainActivity.this).setMessage("您已经选择了取消的按钮,该文件不会被创建").create().show();}}).show();}public void tes4() {final String items[] = { "Java", "PHP", "3G", ".NET" };new AlertDialog.Builder(this).setTitle("简单列表对话框").setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 第一个参数 dialog int which 那个条目Toast.makeText(getApplicationContext(),"xxxxx" + items[which], Toast.LENGTH_LONG).show();}}).show();}public void tes5() {final String items[] = { "Java", "PHP", "3G", ".NET" };new AlertDialog.Builder(this).setTitle("单选列表对话框")// .setSingleChoiceItems(items, checkedItem, listener)// .setSingleChoiceItems(itemsId, checkedItem, listener)// .setSingleChoiceItems(adapter, checkedItem, listener)// .setSingleChoiceItems(cursor, checkedItem, labelColumn, listener)// labelColumn如果数据源是数据集// 数据集中的某一列会作为列表对话框的数据加载的列表框中，该参数表示该列的名称(字段名称).setSingleChoiceItems(items, 1,new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {// 第一个参数 dialog int which 那个条目Toast.makeText(getApplicationContext(),"xxxxx" + items[which],Toast.LENGTH_LONG).show();}}).show();}public void tes6() {final String items[] = { "Java", "PHP", "3G", ".NET" };new AlertDialog.Builder(this).setTitle("多选列表对话框")// .setMultiChoiceItems(itemsId, checkedItems, listener)// .setMultiChoiceItems(cursor, isCheckedColumn, labelColumn,// listener).setMultiChoiceItems(items,new boolean[] { false, true, true, false },new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which, boolean isChecked) {if (isChecked) {Toast.makeText(getApplicationContext(),"xxx" + items[which],Toast.LENGTH_LONG).show();}}}).setPositiveButton("确认", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(getApplicationContext(), "确认",Toast.LENGTH_LONG).show();}}).show();}

//系统进度条public void test7(){handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);switch (msg.what) {case PRO:if (progress >= MAX_PROGRESS) {// 重新设置progress = 0;progressDialog.dismiss();// 销毁对话框} else {progress++;progressDialog.incrementProgressBy(1);// 延迟发送消息handler.sendEmptyMessageDelayed(PRO, 100);}break;default:break;}}};progressDialog = new ProgressDialog(this);progressDialog.setIcon(R.drawable.ic_launcher);progressDialog.setTitle("正在加载数据......");progressDialog.setMessage("请稍后...");// 设置进度条对话框  旋转STYLE_SPINNER，水平 STYLE_HORIZONTALprogressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);// 样式(水平，旋体)// 进度最大值progressDialog.setMax(MAX_PROGRESS);progressDialog.setButton("暂停", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//删除消息队列handler.removeMessages(PRO);}});progressDialog.setButton2("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//删除消息队列handler.removeMessages(PRO);//恢复进度初始值progress=0;progressDialog.setProgress(progress);}});// 显示progressDialog.show();//必须设置到show之后  show之前 可能bugprogress = (progress>0)?progress:0;progressDialog.setProgress(progress);// 线程handler.sendEmptyMessage(PRO);}

//自定义的对话框public void myDialog(){LayoutInflater  layoutInflater = getLayoutInflater();View view = layoutInflater.inflate(R.layout.activity_main, null); //R.layout.activty_main自定义的布局文件new AlertDialog.Builder(this).setView(view).setTitle("自定义的对话框").setPositiveButton("确认按钮", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//处理}}).show();}}