GridView
GridViewActivity.java
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package com.example.lenovo.textapp4; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; import java.util.ArrayList; import java.util.List; public class GridViewActivity extends AppCompatActivity { GridView gv_1; List<Integer>liv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_grid_view); GridView gv_1=(GridView)findViewById(R.id.gv_1); //1-数据 图片的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); //5-绑定 gv_1.setAdapter(new ImageAdapter()); } //2-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id Integer ivid=liv.get(position); //2-准备视图View if (convertView==null) { convertView = new ImageView(GridViewActivity.this); } //3-适配 //转换 ImageView imageView=(ImageView)convertView; imageView.setImageResource(ivid); // imageView.setMaxHeight(70); // imageView.setMaxWidth(70); //设置高宽 imageView.setLayoutParams(new GridView.LayoutParams(100,100)); //4-返回 return imageView; } } }
activity_grid_view
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<?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" 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.lenovo.textapp4.GridViewActivity"> <GridView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/gv_1" android:numColumns="4" android:stretchMode="columnWidth" android:gravity="center"> </GridView> </LinearLayout>