我无法拖放任何东西来布局Android中的图形界面

Question

I am using Eclipse. I can't Drag or Drop anything into graphical interface of my xml file.
When ever I drag anything like a button or a text view it just shows that position dotted block and just stuck at there.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent">

  <TextView
     android:id="@+id/textView1"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_marginLeft="32dp"
     android:layout_marginTop="88dp"
     android:text="text"
     android:textAppearance="?android:attr/textAppearanceMedium" />

  <TextView
     android:id="@+id/textView2"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_marginLeft="32dp"
     android:layout_marginTop="120dp"
     android:text="text"
     android:textAppearance="?android:attr/textAppearanceMedium" />

 <TextView
     android:id="@+id/textView3"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_marginLeft="32dp"
     android:layout_marginTop="160dp"
     android:text="Type your secret password"
     android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

Answer 1

I just copied and pasted your code into a RelativeLayout file I just made on Eclipse, and it seems to be working fine. Have you tried maybe playing around with the height and width of the TextViews or adding background images to the buttons to try and locate them easier? It is possible the wrap_content may be making it too small. And if this is your first time using Android layouts, I would recommend using LinearLayout instead. RelativeLayout can be tough and hard to work with, even for more experienced programmers.