网格布局视图整理

android mani fest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.testapp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" />
        <activity android:name=".test_activity6" />
        <activity android:name=".TestActivity7" />
        <activity android:name=".TestActivity8" />
        <activity android:name=".Main2Activity" />
        <activity android:name=".TestActivity9">
        </activity>
        <activity android:name=".TestActivity10">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

activity_test10.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    tools:context="com.example.administrator.testapp.TestActivity10">

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/gv_1"
        android:numColumns="4"
        android:horizontalSpacing="30dp"
        android:stretchMode="columnWidth"
        android:gravity="center"
        >
    </GridView>

</LinearLayout>

TestActivity10.java

package com.example.administrator.testapp;

import android.app.ActionBar;
import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

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

public class TestActivity10 extends AppCompatActivity {

    GridView gv_1;

    List<Integer>liv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test10);

        GridView gv_1=(GridView)findViewById(R.id.gv_1);

        //1-数据Data 图片id
        liv = new ArrayList<>();
        liv.add(R.drawable.f1);
        liv.add(R.drawable.f2);
        liv.add(R.drawable.f3);
        liv.add(R.drawable.f4);
        liv.add(R.drawable.f5);
        liv.add(R.drawable.f6);
        liv.add(R.drawable.f7);
        liv.add(R.drawable.f8);

        gv_1.setAdapter(new imageadapter());
    }
    //适配器

    class imageadapter extends BaseAdapter
    {
        @Override
        public int getCount() {
            return liv.size();
        }

        @Override
        public Object getItem(int position) {
            return liv.get(position);
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            //1-得到数据 图片的id
            Integer ivid = liv.get(position);
            //2-准备视图（View）
            if (convertView==null) {
                convertView=new ImageView(TestActivity10.this);
            }
            //3-适配
            //转换
            ImageView imageview = (ImageView)convertView;
            imageview.setImageResource(ivid);
//            imageview.setMaxWidth(50);
//            imageview.setMaxHeight(50);
            imageview.setLayoutParams(new GridView.LayoutParams(200,200));
            return imageview;
        }
    }

}