Question

好的我想显示这个AlertDialog，但我只得到一个没有消息或按钮的空白区域。有人知道出了什么问题吗？这是我的主要课程，包括对话框：

public class MainActivity extends Activity {

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
public void CreateDialog1(View view){
final DialogFragment DFragment1=new DialogFragment();
    DFragment1.show(getFragmentManager(), "Alarm1");
    AlertDialog.Builder builder = new AlertDialog.Builder(getApplication());
    builder.setMessage(R.string.create_alarm1);

    builder.setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
                         Intent intent1 = new Intent(AlarmClock.ACTION_SET_ALARM)
                .putExtra(AlarmClock.EXTRA_MESSAGE, "You have set an alarm for the first hour at 6:30 AM")
                .putExtra(AlarmClock.EXTRA_HOUR, 6)
                .putExtra(AlarmClock.EXTRA_MINUTES, 30);
}


 if (intent1.resolveActivity(getPackageManager()) != null) {
                startActivity(intent1);
                DFragment1.dismiss();
            }
        }

    });
    builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            DFragment1.getDialog().cancel();

        }
    });AlertDialog dialog1=builder.create();

}

Answer 1

你需要在构建后显示它，添加：

dialog1.show();

AlertDialog没有出现，为什么？

1 个答案: