利用GridView实现九宫格

**主要布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:id="@+id/show">
</LinearLayout>
</LinearLayout>

**item布局代码

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

<ImageView
    android:id="@+id/image"
    android:layout_width="80dp"
    android:layout_height="80dp"
    android:scaleType="fitXY" />
</LinearLayout>

**fragment部分的布局代码

<FrameLayout 
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">

<GridView
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:verticalSpacing="5dp"
    android:numColumns="3"
    android:horizontalSpacing="10dp"
    android:gravity="center"
    android:id="@+id/GridView">
</GridView>

</FrameLayout>

**主文件中JAVA代码的实现

package com.example.mpyypm.zuoye;

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

/**

• Created by mpyypm on 2017/5/8.
  */

  public class MainActivity extends AppCompatActivity {
  private Fragment grid_viewFragment;
  private FragmentTransaction transction;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

   FragmentManager manager = getFragmentManager() ;
   transction = manager.beginTransaction();
   if(grid_viewFragment ==null){
       grid_viewFragment = new Grid_ViewFragment();
       transction.add(R.id.show, grid_viewFragment);
   }
   transction.replace(R.id.show, grid_viewFragment);
   transction.commit();
  

  }
  }

**fragment部分的代码

package com.example.mpyypm.zuoye;


import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;

import java.util.ArrayList;
import java.util.List;


public class Grid_ViewFragment extends Fragment {


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_grid_view, container, false);

    List<ClassInfo> datas = new ArrayList<>();
    datas.add(new ClassInfo(R.drawable.cat_1));
    datas.add(new ClassInfo(R.drawable.cat_2));
    datas.add(new ClassInfo(R.drawable.cat_3));
    datas.add(new ClassInfo(R.drawable.cat_4));
    datas.add(new ClassInfo(R.drawable.cat_5));
    datas.add(new ClassInfo(R.drawable.cat_6));
    datas.add(new ClassInfo(R.drawable.cat_7));
    datas.add(new ClassInfo(R.drawable.cat_8));
    datas.add(new ClassInfo(R.drawable.cat_9));
    final CustomGridViewAdapter adapter = new CustomGridViewAdapter(getActivity(), datas);


    GridView gridview = (GridView) view.findViewById(R.id.GridView);
    gridview.setAdapter(adapter);
    return view;
}

}