GridView基本使用

1. 控件效果：

 

初始的布局是安卓自带的底部导航栏。。。。。

1.R.layout.g_item

按钮样式

 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">

    <ImageView
        android:id="@+id/i_img"
        android:layout_width="65dp"
        android:layout_height="65dp"
        android:layout_centerInParent="true"
        />

    <TextView
        android:id="@+id/i_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:layout_below="@+id/i_img"
        android:layout_marginTop="20dp"
        android:layout_centerHorizontal="true"
        android:text="实时公交"/>

</RelativeLayout>

 2.fragment_home.xml

主要布局

写在你要的布局页面就行了，属性numColumns是一行有几个控件。

<LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <GridView
                    android:id="@+id/home_ca"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:numColumns="4"/>

            </LinearLayout>

3.glAdapter.java

适配器

一个能用的场合比较多的适配器

public abstract class glAdapter extends BaseAdapter {
    List gllist;
    Context glcontext;

    public glAdapter(List gllist, Context glcontext) {
        this.gllist = gllist;
        this.glcontext = glcontext;
    }

    @Override
    public int getCount() {
        return gllist.size();
    }

    @Override
    public Object getItem(int i) {
        return gllist.get(i);
    }

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

}

4.HomeFragment.java

主要代码以及监听,跳转用getActivity()原因是在framen里，

 

 data = new ArrayList<Icon>();
        data.add(new Icon(R.drawable.g1,"实时公交"));
        data.add(new Icon(R.drawable.g2,"朋友圈"));
        data.add(new Icon(R.drawable.g2,"朋友圈"));
        data.add(new Icon(R.drawable.g2,"朋友圈"));
        glAdapter gladapter = new glAdapter(data,getContext()) {
            @Override
            public View getView(int i, View view, ViewGroup viewGroup) {
                view = View.inflate(getContext(),R.layout.g_item,null);

                ImageView imageView = view.findViewById(R.id.i_img);
                TextView textView = view.findViewById(R.id.i_text);

                imageView.setImageResource(data.get(i).getImg());
                textView.setText(data.get(i).getTitle());

                return view;
            }
        };
        h_ca.setAdapter(gladapter);

        h_ca.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                switch (i){
                    case 0:
                        startActivity(new Intent(getActivity(), g1Activity.class));
                        break;
                    case  1:

                        break;

                }
            }
        });