微调器不会出现在android程序中？

Question

这是代码

dChooser= (Spinner) findViewById(R.id.spinner1);
adapter = new ArrayAdapter<CharSequence>(this,R.array.d_choices);
dChooser.setAdapter(adapter);

这里是xml部分，我不明白我做错了什么

<Spinner
        android:id="@+id/spinner1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/time2"
        android:layout_marginTop="24dp"
        android:spinnerMode="dropdown"
        android:background="@android:color/darker_gray" />

Answer 1

您的适配器似乎错误使用此类

dChooser= (Spinner) findViewById(R.id.spinner1);

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
        R.array.d_choices, android.R.layout.simple_spinner_item);

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

dChooser.setAdapter(adapter);