在Java中创建LinearLayout-未显示元素

Question

我正在尝试用Java中的TextViews创建LinearLayout，因为元素的数量是动态指定的，所以使用XML对我来说不可行。这是我的代码的一些示例：

public class MyActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    LinearLayout layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);
    layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));


    TextView titleView = new TextView(this);
    titleView.setWidth(LayoutParams.WRAP_CONTENT);
    titleView.setHeight(LayoutParams.WRAP_CONTENT);
    titleView.setTextAppearance(this, android.R.attr.textAppearanceLarge);
    titleView.setText("Hallo Welt!");
    layout.addView(titleView);

    setContentView(layout);

}
}

当我启动此活动时，它不会显示此TextView，但也不会显示错误。有人有建议吗？

Answer 1

试试这个，

  LinearLayout layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

        TextView titleView = new TextView(this);
        LayoutParams lparams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        titleView.setLayoutParams(lparams);
        titleView.setTextAppearance(this, android.R.attr.textAppearanceLarge);
        titleView.setText("Hallo Welt!");
        layout.addView(titleView);

        setContentView(layout);