1. 有两个按钮的对话框

Builder builder=new AlertDialog.Builder(AlertDialogActivity.this);
builder.setIcon(android.R.drawable.btn_plus);
builder.setTitle("btnplus");
builder.setMessage("去不去？");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog,int which)
{
Toast.makeText(AlertDialogActivity.this,"你选择了确定按钮",Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog,int which)
{
Toast.makeText(AlertDialogActivity.this, "你选择了取消按钮",Toast.LENGTH_SHORT).show();
}
}
);
builder.show();
}

2.  带有三个按钮的对话框

public void onClick(View v) {
// TODO Auto-generated method stub
new AlertDialog.Builder(AlertDialogActivity.this)
.setIcon(android.R.drawable.btn_star).setTitle("温馨提示").setMessage("提示内容，三个按钮").
setPositiveButton("确定",new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(AlertDialogActivity.this, "你选择了确定按钮", Toast.LENGTH_SHORT).show();
}
})
.setNeutralButton("菜单",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(AlertDialogActivity.this, "你选择了详细按钮", Toast.LENGTH_SHORT).show();
}
})
.setNegativeButton("取消",new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog,int which){
Toast.makeText(AlertDialogActivity.this,"你选择了取消按钮",Toast.LENGTH_SHORT).show();
}
})
.show();
}

3. 能进行输入的对话框

public void onClick(View v) {
// TODO Auto-generated method stub
LayoutInflater inflater=LayoutInflater.from(AlertDialogActivity.this);
final View textEntryView=inflater.inflate(R.layout.alert_dialog_text_entry,null);
final EditText usernameET=(EditText)textEntryView.findViewById(R.id.username_value);
final EditText passwordET=(EditText)textEntryView.findViewById(R.id.password_value);new AlertDialog.Builder(AlertDialogActivity.this)
.setIcon(android.R.drawable.btn_star)
.setTitle("温馨提示")
.setView(textEntryView)
.setPositiveButton("确定",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which)
{
Toast.makeText(AlertDialogActivity.this,"用户名="+usernameET.getText().toString()+"\n密码="+passwordET.getText().toString(),Toast.LENGTH_SHORT).show();
}
})
.setNegativeButton("取消",new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog,int which)
{
Toast.makeText(AlertDialogActivity.this,"你选择了取消按钮",Toast.LENGTH_SHORT).show();
}
})
.show();

4. 进度条对话框

ProgressDialog dialog=new ProgressDialog(AlertDialogActivity.this);
dialog.setTitle("处理中。。。");
dialog.setMessage("请稍等。。。");
dialog.show();