动态创建无线电视图显示

Question

在我班上我想在开始位置设置无线电组按钮但是没有正确放置。这是我的班级观点：

layout.xml文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="150dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true" >

    <Button
        android:id="@+id/buttonp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/buttons"
        android:text="more question" />

    <Button
        android:id="@+id/buttons"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Submit" />

    <TextView
        android:id="@+id/tvTimeCount"
        style="@style/normalText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/buttonp"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="20dp"
        android:text="00:00" />
</RelativeLayout>

活动代码：

public class Rate_me_up extends Activity implements OnClickListener,
    OnCheckedChangeListener {
RelativeLayout layout;
int id = 1;
private TextView textViewShowTime;
private long totalTimeCountInMilliseconds = 60 * 1 / 4 * 1000;

private long timeBlinkInMilliseconds = 30 * 1000 * 1 / 4;
private CountDownTimer countDownTimer;
private boolean blink;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.rate_me_up);
    textViewShowTime = (TextView) findViewById(R.id.tvTimeCount);
    layout = (RelativeLayout) findViewById(R.id.linear);

    Button btnp = (Button) findViewById(R.id.buttonp);
    btnp.setOnClickListener(this);

}

@Override
public void onClick(View v) {
    RadioGroup radioGroup = new RadioGroup(Rate_me_up.this);
    radioGroup.setOrientation(0);

    RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.MATCH_PARENT);
    layout.addView(radioGroup, p);
    RadioButton radioButtonView = new RadioButton(Rate_me_up.this);
    radioButtonView.setText("radio1");
    radioButtonView.setId(id++);
    radioButtonView.setButtonDrawable(R.drawable.e404);
    radioButtonView.setChecked(false);
    radioGroup.addView(radioButtonView, p);

    RadioButton radioButtonView2 = new RadioButton(Rate_me_up.this);
    radioButtonView2.setText("radio2");
    radioButtonView2.setId(id++);
    radioButtonView2.setChecked(false);
    radioGroup.addView(radioButtonView2, p);
    RadioButton radioButtonView3 = new RadioButton(Rate_me_up.this);
    radioButtonView3.setText("radio3");
    radioButtonView3.setId(id++);
    radioGroup.addView(radioButtonView3, p);
    radioButtonView3.setChecked(false);
    TextView txt = new TextView(Rate_me_up.this);

    txt.setText("FOOD QUALITY!");
//  layout.addView(txt, p);

    radioGroup.setOnCheckedChangeListener(this);

}

Answer 1

由于您已经定义了RelativeLayout Params，因此您只需向其添加规则即可将RadioGroup与顶部对齐。

p.addRule(RelativeLayout.ALIGN_PARENT_TOP);

之前这样做：

layout.addView(radioGroup, p);

修改

您还需要将RelativeLayout.LayoutParams中的高度更改为WRAP_CONTENT。

编辑2：

如果您想要将无线电组动态添加到彼此之下，您可以这样做：

首先添加两个实例变量

private RadioGroup mLastRadioGroup;
private int mRadioGroupId = 1111; //just a default start id.

然后在分配LayoutParams后立即添加此行。 （如果你想要动态添加，请抛弃上面提到的规则）

if (mLastRadioGroup != null)
   p.addRule(RelativeLayout.BELOW, mLastRadioGroup.getId());

然后在将radioGroup添加到布局之前，设置其ID。并将mLastRadioGroup分配给您的广播组。

radioGroup.setId(mRadioGroupId++);
mLastRadioGroup = radioGroup;
layout.addView(radioGroup, p); // I moved this to the bottom

这样我们就知道了最后一组ID，我们可以继续在它下面添加一个新的。

Answer 2

我认为这是因为您的xml文件RelativeLayout中第二个android:layout_height="150dp"的高度需要设置为android:layout_height="fill_parent"