android - 如何删除标题栏和 LinearLayout 的第一个元素之间的黑色空间？

Question

我有一个线性布局，第一个元素是 ImageView 标题，第二个元素是 GridView 。

它工作正常，但我在 android 标题栏和应用程序标题之间有一个 50px(或多或少)的错误黑色空间，这是线性布局的第一个元素

为什么我有那个空间？我发现删除它的唯一方法是放置以下行:ll.setPadding(0, -50, 0, 0);

这是完整的代码:

public class MainGrid extends Activity {
    private GridView myGridView;
    private ImageAdapter myImageAdapter;
    private ImageView header;
    
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);//turn off the window's title bar
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//fullscreen
    LinearLayout ll = new LinearLayout(this);
    ll.setOrientation(LinearLayout.VERTICAL);
    ll.setGravity(Gravity.CENTER);
    //ll.setPadding(0, -50, 0, 0);
    header = new ImageView(getApplicationContext());
    header.setImageResource(R.drawable.header_acc);
    
    myGridView = new GridView(this);
    myImageAdapter=new ImageAdapter(this);
    myGridView.setAdapter(myImageAdapter);

    ll.addView(header);
    ll.addView(myGridView);
    setContentView(ll);
}

快照:

Answer 1

更新:如果您在 list 中设置 android:theme="@android:style/Theme.NoTitleBar.Fullscreen"，这应该可以正常工作。

public class MainGrid extends Activity {
    private GridView myGridView;
    private ImageAdapter myImageAdapter;
    private ImageView header;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    LinearLayout ll = new LinearLayout(this);
    ll.setOrientation(LinearLayout.VERTICAL);
    ll.setGravity(Gravity.TOP);   // SET THIS TO TOP

    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
    ll.setLayoutParams(lp);
    // I'VE ADDED LAYOUTPARAMS TOO

    header = new ImageView(getApplicationContext());
    header.setImageResource(R.drawable.header_acc);

    myGridView = new GridView(this);
    myImageAdapter=new ImageAdapter(this);
    myGridView.setAdapter(myImageAdapter);

    ll.addView(header);
    ll.addView(myGridView);
    setContentView(ll);
}