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在另一个活动中以编程方式对齐相对布局

[英]Aligning A Relative Layout Progmatically in Another Activity

好吧,我完全坚持这一点。 我到处都在寻找答案,但没有找到对我有任何好处的解决方案。 我想做的是在线性布局中添加相对布局,我可以做到这一点,问题是我只能设置相对布局的高度和宽度,而不能在任何视图下对齐它在线性布局中。 我猜这是因为相对布局不是线性布局的子级吗? 我采用上述方法的唯一原因是因为我需要为数据库表中的每个记录添加相对布局。 无论如何,这是下面的代码,对您的帮助将是巨大的:)

personal_past_test.xml文件

    <?xml version="1.0" encoding="utf-8"?>
      <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/past_test"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#E4EFF5" >

       <TextView
         android:id="@+id/candidate_name"
         style="@style/past_test_candidate"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentLeft="true"
         android:layout_alignParentTop="true"
         android:layout_marginLeft="25dp" />

     </RelativeLayout>

IndividualPastTest.java

    public class IndividualPastTests extends RelativeLayout {

    private Context mContext;

    public IndividualPastTests(Context context) {
    super(context);

    mContext = context;

    String infService = Context.LAYOUT_INFLATER_SERVICE;
    LayoutInflater li;

    li = (LayoutInflater) getContext().getSystemService(infService);
    li.inflate(R.layout.individual_past_test, this, true);
    }
    }

PastTests.java(相关部分)

    past_tests_label = (TextView) findViewById(R.id.past_tests_label);
    past_tests_label.setId(1);

    addViewForFirstTest();

    private void addViewForFirstTest() {

    past_test = new IndividualPastTests(this);
    RelativeLayout.LayoutParams past_test_view_params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    past_test.setGravity(Gravity.CENTER_HORIZONTAL);

    // Not being called?
    past_test_view_params.addRule(RelativeLayout.BELOW, past_tests_label.getId());

            past_test_view_params.height = 100;
    past_test_view_params.width = 600;


    System.out.println(past_tests_label.getId());

    past_test.setLayoutParams(past_test_view_params);       
    this.addContentView(past_test, past_test_view_params);

}

好的,我最后通过将相对布局添加到我的xml文件中以进行过去的测试来解决它(我没有添加到问题中),然后按如下所示更改了PastTests.java:

        // Added this line to get the RelativeLayout I created in the xml to hold my view
        pasts_tests_holder = (RelativeLayout) findViewById(R.id.past_tests_holder)

        past_tests_label = (TextView) findViewById(R.id.past_tests_label);
        past_tests_label.setId(1);

        addViewForFirstTest();

    private void addViewForFirstTest() {

        past_test = new IndividualPastTests(this);
        RelativeLayout.LayoutParams past_test_view_params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        past_test.setGravity(Gravity.CENTER_HORIZONTAL);

        past_test_view_params.addRule(RelativeLayout.BELOW, past_tests_label.getId());

        past_test_view_params.height = 100;
        past_test_view_params.width = 600;

        past_test.setLayoutParams(past_test_view_params);       

        // Changed this line to add the past_test view to my new relative layout 
        past_tests_holder.addView(past_test);

这是我past_tests.xml文件的相关部分,以供参考-

    <?xml version="1.0" encoding="utf-8"?>
       <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:id="@+id/prev_test_view"
          android:orientation="vertical" >

         <RelativeLayout
             android:id="@+id/past_tests"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_below="@+id/past_tests_label"
             android:layout_centerHorizontal="true"
             android:layout_marginTop="227dp" >

         </RelativeLayout> 
      </LinearLayout>

希望这可以帮助其他在实用中设置android视图困难的人

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