alertdialog简单用法

new AlertDialog.Builder(MainActivity.this)
.setTitle("aaa")
.setIcon(R.drawable.ic_launcher)
.setMessage("next")
.setPositiveButton("确定按钮",
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub

}
}).setNegativeButton("普通按钮", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub

}
}).setNeutralButton("取消按钮", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub

}
}).show();

private void itemDialog(){
final String[] levle = {"1","2","3"};
new AlertDialog.Builder(MainActivity.this)
.setTitle("选择级别")
//添加取消按钮,没有写事件
.setNeutralButton("取消", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub

}
})
//添加列表项  参数分别为数据，事件
.setItems(levle, new DialogInterface.OnClickListener() {

@Override
//点击列表项会把结果显示到tv里
public void onClick(DialogInterface dialog, int which) {
MainActivity.this.tv.setText("选择的级别是"+levle[which]);
}
}).show();
}

private void muliItem(){
final String[] data ={"1","2","3"};
boolean[] b = {true,false,false};
new AlertDialog.Builder(MainActivity.this)
.setTitle("ok")
//传入的参数分别是数据，默认选中状态，事件
　　　　　.setMultiChoiceItems(data, b, new OnMultiChoiceClickListener() {

@Override
　　　　　　　　
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
String msg ="";
for (int i = 0; i < data.length; i++) {
if(i==which && isChecked){
msg += data[which];
}
}
MainActivity.this.tv.append(msg);

}
}).setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show();
}

//防止对话框意外关闭
private void setCloseable(DialogInterface dialog,boolean b) {
// TODO Auto-generated method stub
Field field ;
try {
field = dialog.getClass().getSuperclass().getDeclaredField("mShowing");
field.setAccessible(true);
field.set(dialog,b);
} catch (NoSuchFieldException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}