Android:如何使用Dialog避免完整操作

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("请选择操作");
builder.setMessage("请选择您要执行的操作");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // 执行确定操作
    }
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // 执行取消操作
    }
});
builder.show();

public class CustomDialog extends Dialog {
    public CustomDialog(Context context) {
        super(context);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_custom);
        // 初始化控件
        // 设置按钮监听器
    }
}

CustomDialog dialog = new CustomDialog(this);
dialog.show();

public class CustomDialogFragment extends DialogFragment {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("请选择操作");
        builder.setMessage("请选择您要执行的操作");
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 执行确定操作
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 执行取消操作
            }
        });
        return builder.create();
    }
}

CustomDialogFragment fragment = new CustomDialogFragment();
fragment.show(getSupportFragmentManager(), "custom_dialog");