这是我的第一个 android程序，下面是 错误信息
忘了告诉你们了，我是在android模拟器下运行的，没有用手机跑

[2014-08-21 00:00:28 - test] ------------------------------
[2014-08-21 00:00:28 - test] Android Launch!
[2014-08-21 00:00:28 - test] adb is running normally.
[2014-08-21 00:00:28 - test] Performing com.example.test.MainActivity activity launch
[2014-08-21 00:00:28 - test] Uploading test.apk onto device '94488e54'
[2014-08-21 00:00:28 - test] Installing test.apk...
[2014-08-21 00:00:29 - test] Installation error: INSTALL_CANCELED_BY_USER
[2014-08-21 00:00:29 - test] Please check logcat output for more details.
[2014-08-21 00:00:29 - test] Launch canceled!
这是代码

    <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.example.test.MainActivity" >



<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="姓名" 
    android:textSize="28sp"

    />

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/textView1"
    android:layout_alignParentRight="true"
    android:layout_marginRight="17dp"
    android:ems="10"
    android:hint="请输入姓名" />