Android之Dialog详解
Dialog是Android中最常用的组件之一，类似黑莓中的Dialog。
Android中的alertDialog的创建一般是通过其内嵌类AlertDialog.Builder来实现的。
先来看下builder的方法：
setTitle()：给对话框设置title
setIcon()：给对话框设置图标
setMessage()：设置对话框的提示信息
setItems()：设置对话框要显示的一个list,一般用于要显示几个命令时
setSingleChoiceItems()：设置对话框显示一个单选的List
setMultiChoiceItems()：用来设置对话框显示一系列的复选框
setPositiveButton()：给对话框添加”Yes”按钮
setNegativeButton()：给对话框添加”No”按钮
setNeutralButton：给对话框添加"中立"按钮
Android中的Dialog包括了以下类型：
1 警告对话框：Alertialog
2 进度对话框：ProgressDialog
3 日期选择对话框：DatePickerDialog
4 时间选择对话框：TimePickerDialog
5 自定义对话框：继承Dialog，重写相关方法
Android中创建Dialog有两种方式：
1、直接new一个Dialog对象，然后调用Dialog对象的show和dismiss方法来控制对话框的显示和隐藏。
2、在Activity的onCreateDialog(int id)方法中创建Dialog对象并返回，然后调用Activty的showDialog(int id)和dismissDialog(int id)来显示和隐藏对话框。
二者之间的区别：
通过第二种方式创建的对话框会继承Activity的属性，比如可以获得Activity的menu事件等。
AlertDialog.Builder builder = new AlertDialog.Builder(MainDialog.this);
setIcon
setTitle
setPositiveButton
setNeutralButton
setNegativeButton
setMessage
final String[] mItems = {"item0","item1","itme2","item3","itme4","item5","item6"};
builder.setItems(mItems, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
showDialog("你选择的id为" + which + " , " + mItems[which]);
}
});
builder.create().show();
builder.setSingleChoiceItems(mItems, 0, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
mSingleChoiceID = whichButton;
showDialog("你选择的id为" + whichButton + " , " + mItems[whichButton]);
}
});
ProgressDialog mProgressDialog = new ProgressDialog(MainDialog.this);
mProgressDialog.setIcon(R.drawable.icon);
mProgressDialog.setTitle("进度条窗口");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setMax(MAX_PROGRESS);
mProgressDialog.setButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//这里添加点击后的逻辑
}
});
mProgressDialog.setButton2("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//这里添加点击后的逻辑
}
});
mProgressDialog.show();
new Thread(this).start();
public void run() {
int Progress = 0;
while(Progress < MAX_PROGRESS) {
try {
Thread.sleep(100);
Progress++;
mProgressDialog.incrementProgressBy(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
MultiChoiceID 用于记录多选选中的id号 存在ArrayList中选中后 add 进ArrayList取消选中后 remove 出ArrayList。
ArrayList <Integer>MultiChoiceID = new ArrayList <Integer>();
AlertDialog.Builder builder = new AlertDialog.Builder(MainDialog.this);
MultiChoiceID.clear();
builder.setIcon(R.drawable.icon);
builder.setTitle("多项选择");
builder.setMultiChoiceItems(mItems,
new boolean[]{false, false, false, false, false, false, false},
new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog, int whichButton, boolean isChecked) {
if(isChecked) {
MultiChoiceID.add(whichButton);
showDialog("你选择的id为" + whichButton + " , " + mItems[whichButton]);
}else {
MultiChoiceID.remove(whichButton);
}
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String str = "";
int size = MultiChoiceID.size();
for (int i = 0 ;i < size; i++) {
str+= mItems[MultiChoiceID.get(i)] + ", ";
}
showDialog("你选择的是" + str);
}
);
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
});
builder.create().show();
