吳裕雄--天生自然ANDROID開發學習:2.5.2 GridView(網格檢視)的基本使用
阿新 • • 發佈:2020-08-29
1.相關屬性: 下面是GridView中的一些屬性: android:columnWidth:設定列的寬度 android:gravity:元件對其方式 android:horizontalSpacing:水平方向每個單元格的間距 android:verticalSpacing:垂直方向每個單元格的間距 android:numColumns:設定列數 android:stretchMode:設定拉伸模式,可選值如下: none:不拉伸;spacingWidth:拉伸元素間的間隔空隙 columnWidth:僅僅拉伸表格元素自身 spacingWidthUniform:既拉元素間距又拉伸他們之間的間隔空襲
程式碼實現: 首先是GridView 的 Item的佈局:item_grid_icon.xml: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="5dp"> <ImageView android:id="@+id/img_icon" android:layout_width="64dp" android:layout_height="64dp" android:layout_centerInParent="true" android:src="@mipmap/iv_icon_1" /> <TextView android:id="@+id/txt_icon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/img_icon" android:layout_centerHorizontal="true" android:layout_marginTop="30dp" android:text="呵呵" android:textSize="18sp" /> </RelativeLayout> 接著我們寫個entity實體類:Icon.java: /** * Created by Jay on 2015/9/24 0024. */ public class Icon { private int iId; private String iName; public Icon() { } public Icon(int iId, String iName) { this.iId = iId; this.iName = iName; } public int getiId() { return iId; } public String getiName() { return iName; } public void setiId(int iId) { this.iId = iId; } public void setiName(String iName) { this.iName = iName; } } 最後是MainActivity的佈局以及Java程式碼 activity_main.xml: <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:padding="5dp" tools:context=".MainActivity"> <!--numColumns設定每行顯示多少個--> <GridView android:id="@+id/grid_photo" android:layout_width="match_parent" android:layout_height="match_parent" android:numColumns="3" /> </RelativeLayout> MainActivity.java: public class MainActivity extends AppCompatActivity { private Context mContext; private GridView grid_photo; private BaseAdapter mAdapter = null; private ArrayList<Icon> mData = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = MainActivity.this; grid_photo = (GridView) findViewById(R.id.grid_photo); mData = new ArrayList<Icon>(); mData.add(new Icon(R.mipmap.iv_icon_1, "圖示1")); mData.add(new Icon(R.mipmap.iv_icon_2, "圖示2")); mData.add(new Icon(R.mipmap.iv_icon_3, "圖示3")); mData.add(new Icon(R.mipmap.iv_icon_4, "圖示4")); mData.add(new Icon(R.mipmap.iv_icon_5, "圖示5")); mData.add(new Icon(R.mipmap.iv_icon_6, "圖示6")); mData.add(new Icon(R.mipmap.iv_icon_7, "圖示7")); mAdapter = new MyAdapter<Icon>(mData, R.layout.item_grid_icon) { @Override public void bindView(ViewHolder holder, Icon obj) { holder.setImageResource(R.id.img_icon, obj.getiId()); holder.setText(R.id.txt_icon, obj.getiName()); } }; grid_photo.setAdapter(mAdapter); grid_photo.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(mContext, "你點選了~" + position + "~項", Toast.LENGTH_SHORT).show(); } }); } }