1、在layout中添加按钮
2、在MainActivity中添加以下函数
public void showDialog(View view){
AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle("标题");
builder.setMessage("提示内容");
builder.setPositiveButton("我知道了", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog dialog=builder.create();
dialog.show();
}
3、在按钮的OnCIick事件绑定以上函数
显示效果