对话框

//单选对话框

AlertDialog.Builder builder=new Builder(MainActivity.this);//对话框中只能用MainActivity.this;
builder.setTitle("警告");
builder.setMessage("网路异常");
builder.setNegativeButton("取消", new OnClickListener() {

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

}
});
builder.setPositiveButton("确定", new OnClickListener() {

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

}
});

builder.show();

//单选对话框
AlertDialog.Builder builder2 =new Builder(MainActivity.this);
builder2.setTitle("请选出你喜欢的科目");
final String[] items ={"Android","iOS","c","c++"};
builder2.setSingleChoiceItems(items, -1, new OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// 根据点击的选项取出所点击选项的内容
String string = items[which];

}
});
builder2.show();

//进度条dialog
ProgressDialog dialog=new ProgressDialog(MainActivity.this);
dialog.setMessage("正在玩命加载中");
dialog.show();

//横向进度条dialog
final ProgressDialog dialog2=new ProgressDialog(MainActivity.this);
dialog2.setMessage("正在玩命加载中ING");
dialog2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
new Thread(new Runnable() {

@Override
public void run() {
//设置进度的长度
dialog2.setMax(100);
for (int i = 0; i < 100; i++) {
//设置进度条每一次进度的变化时间
SystemClock.sleep(50);
//设置进度条变化的位置
dialog2.setProgress(i);

}
//当达到100时让进度条消失
dialog2.dismiss();
}
}).start();
dialog2.show();