activity_main.xml：字符串索引超出范围：Android代码中为0

Question

That's my activity_main.xml, when I try see my Graphical it's returned any errors:

Exception raised during rendering: String index out of range: 0 Exception details are logged in Window > Show View > Error Log The following classes could not be found: - EditText (Change to android.widget.EditText, Fix Build Path, Edit XML)

I guess have something with error "activity_main.xml: String index out of range: 0" any like that menssage in my View.

Have anybody can I help me?

Down is my activity:

<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=".MainActivity">

<TextView
    android:id="@+id/lblPeso"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="@string/peso_" />

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/lblPeso"
    android:ems="10" android:inputType="none">

    <requestFocus />
</EditText>

<TextView
    android:id="@+id/lblAltura"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText1"
    android:layout_below="@+id/editText1"
    android:layout_marginTop="21dp"
    android:text="@string/altura_" />

<EditText
    android:id="@+id/editText2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/lblAltura"
    android:layout_below="@+id/lblAltura"
    android:ems="10" android:inputType="none"/>

<Button
    android:id="@+id/buttonCalcular"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/editText2"
    android:layout_marginTop="14dp"
    android:layout_toRightOf="@+id/editText2"
    android:text="@string/calcular_" />

<EditText
    android:id="@+id/editText3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText2"
    android:layout_below="@+id/buttonCalcular"
    android:ems="10" android:inputType="none"/>

<EditText
    android:id="@+id/editText4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText3"
    android:layout_below="@+id/editText3"
    android:layout_marginTop="20dp"
    android:ems="10" android:inputType=""/>

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/buttonCalcular"
    android:layout_alignLeft="@+id/editText3"
    android:text="@string/imc_" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText4"
    android:layout_below="@+id/editText3"
    android:text="@string/pesoIdeal_" />

(ANDROID)

Answer 1

Your xml is wrong, please correct all your left_below etc. declarations inside the xml. For example, You wrote:

        <EditText
     android:id="@+id/editText1"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_alignParentLeft="true"
     android:layout_below="@+id/lblPeso"
     android:ems="10" android:inputType="none">

but it has to be:

     <EditText
     android:id="@+id/editText1"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_alignParentLeft="true"
     android:layout_below="@id/lblPeso" <---- Here is the issue
     android:ems="10" android:inputType="none">

correct this in the complete layout everywhere you have done this. You wrote layout_below="@+id/...." but it hast to be layout_below="@id/..."

Answer 2

刚遇到同一问题，问题出在OP的editText4中为空的inputType（android：inputType =“”）。

Answer 3

在“”中不放任何内容，在编辑text4中将“不放”任何内容

<EditText android:id="@+id/editText4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText3" android:layout_below="@+id/editText3" android:layout_marginTop="20dp" android:ems="10" android:inputType="none"/>

Answer 4

I have ever met this exception when I was working with a layout XML file in Android Studio. As this snapshot: Exception raised during rendering: String index out of range: 0

And I delete one of my code:

android:layout_gravity=""

After that the exception is gone.

---

So as for you, replace your code:

android:inputType=""

with

android:inputType="none"