android.support.v7.widget.GridLayout cannot get it to work

Question

I have an android project which utilizes GridLayout in most of its menus and screens. The problem however is that GridLayout is supported from API 14 and onwards.

Since I want to make the application available to older version of android as well, I tried to use Android's own Support Library GridLayout which adds support up to API 7. This was exactly what I was looking for, however I cannot for the life of me get it to work. I have tried all of these explanations and ideas:

1. Android's official instructions
2. Solution 1
3. Solution 2
4. Solution 3
5. Solution 4
6. Solution 5

and more...

No matter what I do, how I do it or what IDE I use (whether Eclipse ADT or Android Studio), it always gives me an error in the Layout XML along the lines of:

The following classes could be instantiated:  - android.support.v7.widget.GridLayout

With either one of these exceptions showing in the error log:

1. android.content.res.Resources$NotFoundException: Could not resolve value 0x7F080000
2. java.lang.classnotfoundexception: android.support.v7.gridlayout.R$dimen

Edit: For reference this is what I'm using to create the support gridlayout (taken directly from the android sample programs):

<android.support.v7.widget.GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/blue"
    android:padding="10dip"
    app:columnCount="4"
    >
    <TextView
        android:text="@string/string_test"
    />
    <EditText
        app:layout_gravity="fill_horizontal"
        app:layout_column="0"
        app:layout_columnSpan="4"
    />
    <Button
        android:text="@string/button_test"
        app:layout_column="2"
    />
</android.support.v7.widget.GridLayout>

What could I possibly be doing wrong that none of the above solutions work? Is there something I'm missing, maybe there's a problem with my original code?

Any help is appreciated

Solution 1

Try using Gradle, and in your build.gradle file add the following section at the end:

dependencies {
  implementation 'com.android.support:gridlayout-v7:28.0.0'
  implementation 'com.android.support:appcompat-v7:28.0.0'
}

Then execute assembleDebug gradle task.

Solution 2

With Android Studio:

• Go in the build.gradle and add:

  compile 'com.android.support:appcompat-v7:18.0.+'
  

  in your dependencies.

• Sync your project by clicking the icon on the left of AVD manager. It will implement the library

• And try again

With Eclipse try this: Gridview v7 support for older api android.support.v7.widget.Gridlayout failed to instaniate

Solution 3

For current stable Release 1.0.0 : To add a dependency on GridLayout, you must add the Google Maven repository to your project. Add the dependencies for the artifacts you need in the build.gradle file for your app or module:

dependencies {
    implementation "androidx.gridlayout:gridlayout:1.0.0"
}

Solution 4

Refer from http://developer.android.com/tools/support-library/features.html#v7-gridlayout, you should import gridlayout as a eclipse project, then add it as an library project into your project, make sure the build path has included the jar.

Solution 5

In my case I fixed it setting:

<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" />

in the gridlayout_v7 project manifest file.

View more solutions

Comments

[user475680]

@nsvir - added my XML code, though nothing special about it, I used the sample code given by android

[user475680]

The code I'm using is running without gradle (while trying to create one via eclipse it shows an error and doesn't do anything), I saw this solution but since I'm not using gradle it's not viable

[nsvir]

Did you restart your IDE ?

[user475680]

Yes, multiple times. Tried creating numerous new projects just to test but nothing works

[nsvir]

Well I tried on Android Studio and Eclipse by importing appcompat and/or gridlayout and It doesn't work for me neither.. Sorry

[user475680]

Thanks anyway, appreciate your help.

[milosmns]

This should be the accepted answer. Importing v24 appcompat and later in ADT (Eclipse) will not work. Build tools are not storing ADT-compatible libraries anymore, and extracting from .aar is too much work - consider moving to Android Studio and Gradle-based build system.

[Sisir]

With Android Studio 3.0 on wards, instead of compile use implementation

[joghm]

this is buggy, causing me lot of issues :\.gradle\caches\transforms-2\files-2.1\834d222cdf56ff4579f6‌​f997b4d0229f\gridlay‌​out-1.0.0\res\values‌​\values.xml:3:5-73:2‌​5: AAPT: error: resource previously defined here.