Question

我在代码视图中添加了两个元素。 imageView和纺车。这两个元素显示但在同一个地方。我希望将ImageView放在屏幕中心的另一个元素之上。

添加视图的代码：

    RelativeLayout container= (RelativeLayout)findViewById(R.id.container);

    RelativeLayout.LayoutParams position = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    position.addRule(RelativeLayout.CENTER_IN_PARENT);
    imgCenter.setLayoutParams(position);
    container.addView(imgCenter); 

    RelativeLayout.LayoutParams position2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    position2.addRule(RelativeLayout.CENTER_IN_PARENT);
    position2.addRule(RelativeLayout.BELOW,imgCenter.getId());
    spinner.setLayoutParams(position2);
    container.addView(spinner);

relativelayout的xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.app.exemple.LoadingActivity"
android:id="@+id/container" >

Answer 1

删除第二个孩子的父母中心

RelativeLayout container= (RelativeLayout)findViewById(R.id.container);

RelativeLayout.LayoutParams position = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
position.addRule(RelativeLayout.CENTER_IN_PARENT);
imgCenter.setLayoutParams(position);
container.addView(imgCenter); 

RelativeLayout.LayoutParams position2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
position2.addRule(RelativeLayout.BELOW,imgCenter.getId());
spinner.setLayoutParams(position2);
container.addView(spinner);

Answer 2

感谢@HareshChhelana，我找到了解决方案。我按如下方式更改了xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.app.exemple.LoadingActivity"
android:id="@+id/container"
android:orientation="vertical"
android:gravity="center" >

代码：

LinearLayout container= (LinearLayout)findViewById(R.id.container);
    ProgressBar spinner = new ProgressBar(this,null,android.R.attr.progressBarStyleLarge);
    container.addView(imgCenter); 
    container.addView(spinner);

Android：以编程方式将两个元素放在relativeLayout的中心

2 个答案: