Android编程之九宫格实现方法实例分析

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
 <!-- id gv_all
  宽高都是填充父窗体
  numcolums 为3
  水平控件的距离 10px
  垂直距离是10px
  gridview 离底部58px
  离顶部28px
  离左边5px
  离右边5px
 -->
<GridView
  android:id="@+id/gv_all"
  android:layout_height="fill_parent"
  android:layout_width="fill_parent"
  android:numColumns="3"
  android:horizontalSpacing="10px"
  android:verticalSpacing="10px"
  android:layout_marginBottom="58px"
  android:layout_marginTop="28px"
  android:layout_marginLeft="5px"
  android:layout_marginRight="5px"
></GridView>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="90px"
 android:layout_height="90px">
  <ImageView
   android:layout_width="64px"
   android:layout_height="64px"
   android:layout_gravity="center_horizontal"
   android:id="@+id/main_gv_iv"
  />
  <TextView
  android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_gravity="center_horizontal"
   android:textSize="16px"
   android:textColor="#FFF"
   android:id="@+id/main_gv_tv"
  />
</LinearLayout>

public class MainActivity extends Activity {
  public static final String TAG = "MainActivity";
  GridView maingv;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //全屏
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.mainactivity);
    //获取到GridView
    maingv = (GridView) this.findViewById(R.id.gv_all);
    //给gridview设置数据适配器
    maingv.setAdapter(new MainGridViewAdapter(this));
    //点击事件
    maingv.setOnItemClickListener(new MainItemClickListener());
  }
  private class MainItemClickListener implements OnItemClickListener{
    /**
     * @param parent 代表当前的gridview
     * @param view 代表点击的item
     * @param position 当前点击的item在适配中的位置
     * @param id 当前点击的item在哪一行
     */
    public void onItemClick(AdapterView<?> parent, View view, int position,
        long id) {
      switch (position) {
      case 0:
        Intent intent = new Intent(MainActivity.this,LostProtectedActivity.class);
        startActivity(intent);
        break;
      }
    }
  }
}

// 完成gridview 数据到界面的适配
public class MainGridViewAdapter extends BaseAdapter {
  private static final String TAG = "MainGridViewAdapter";
  private String[] names = {"手机防盗","通讯卫士","软件管理","任务管理","上网管理","手机杀毒","系统优化","高级工具","设置中心"};
  private int[] icons = {R.drawable.safe,R.drawable.callmsgsafe,R.drawable.app,R.drawable.taskmanager,R.drawable.netmanager,R.drawable.trojan,R.drawable.sysoptimize,R.drawable.atools,R.drawable.settings};
  private Context context;
  LayoutInflater infalter;
  public MainGridViewAdapter(Context context) {
    this.context = context;
    //方法1 通过系统的service 获取到 试图填充器
    //infalter = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    //方法2 通过layoutinflater的静态方法获取到 视图填充器
    infalter = LayoutInflater.from(context);
  }
  // 返回gridview里面有多少个条目
  public int getCount() {
    return names.length;
  }
  //返回某个position对应的条目
  public Object getItem(int position) {
    return position;
  }
  //返回某个position对应的id
  public long getItemId(int position) {
    return position;
  }
  //返回某个位置对应的视图
  public View getView(int position, View convertView, ViewGroup parent) {
    Log.i(TAG,"GETVIEW "+ position);
    //把一个布局文件转换成视图
    View view = infalter.inflate(R.layout.mainactivity_item, null);
    ImageView iv = (ImageView) view.findViewById(R.id.main_gv_iv);
    TextView tv = (TextView) view.findViewById(R.id.main_gv_tv);
    //设置每一个item的名字和图标
    iv.setImageResource(icons[position]);
    tv.setText(names[position]);
    return view;
  }
}