java - 动态编写 XML

Question

我想知道如何用Java动态编写下面的数据。我对你如何编写“layout_alignParent”可以设置每个 TextView 的重力感到困惑......

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView2"
    android:layout_alignParentBottom="true"
    android:gravity="center_horizontal" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:gravity="center_vertical" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/textView3"
    android:layout_alignBottom="@+id/textView3"
    android:layout_alignParentRight="true"
    android:gravity="center_vertical" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:gravity="center_horizontal" />

我知道下面的代码不起作用。但我怎样才能重写它才能工作呢？

RelativeLayout m = (RelativeLayout)findViewById(R.id.tileContainerME);
EditText et1 = new EditText(this);
EditText et2 = new EditText(this);
EditText et3 = new EditText(this);
EditText et4 = new EditText(this);

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
    android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT,
    android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);

params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);        
et1.setLayoutParams(params);
params.removeRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);  
params.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);    
et2.setLayoutParams(params);
params.removeRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.removeRule(RelativeLayout.CENTER_VERTICAL);

params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);     
et3.setLayoutParams(params);
params.removeRule(RelativeLayout.ALIGN_PARENT_RIGHT);

params.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
params.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);      
et4.setLayoutParams(params);
params.removeRule(RelativeLayout.ALIGN_PARENT_TOP);
params.removeRule(RelativeLayout.CENTER_HORIZONTAL);

et1.setGravity(Gravity.CENTER_HORIZONTAL);
et1.setHint("Test");
et2.setGravity(Gravity.CENTER_VERTICAL);
et2.setHint("Test");
et3.setGravity(Gravity.CENTER_VERTICAL);
et3.setHint("Test");
et4.setGravity(Gravity.CENTER_HORIZONTAL);
et4.setHint("Test");

m.addView(et1);
m.addView(et2);
m.addView(et3);
m.addView(et4);

Answer 1

我认为这段代码会对您有所帮助:

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
    RelativeLayout.LayoutParams.WRAP_CONTENT,
    RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
textView.setLayoutParams(params);

编辑:

params.gravity = Gravity.CENTER_HORIZONTAL;
tv2.setLayoutParams(params);