Question

我通过GridView绘制矩阵。在4x4的情况下，它的工作正常（每行包含4个项目），默认值。绘制5x5时会出现问题，每行只有4个项目。

我的想法：每行调整项目宽度=（屏幕宽度）/数量项目。没关系？如果它的权利，有人可以给我代码（抱歉，我是Android新手）

或者，任何人都可以在所有情况下（5x5,6x6等）为我提供其他想法或代码示例吗？

---我的代码--- MainLayout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id = "@+id/container" 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center" 
android:orientation="vertical" >

<GridView
    android:id="@+id/gridView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="0dp"
    android:layout_margin="0dp"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:numColumns="auto_fit"
    android:columnWidth="60dp"
    android:stretchMode="columnWidth"    
    android:gravity="center" >

</GridView>

ImageAdapter

public class ImageAdapter extends BaseAdapter {
private Context mContext;

public ImageAdapter(Context c) {
    mContext = c;
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    //return 0;
    return mThumbIds.length;
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {  // if it's not recycled, initialize some attributes
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(0, 0, 0, 0);
    } else {
        imageView = (ImageView) convertView;
    }

    imageView.setImageResource(mThumbIds[position]);
    return imageView;
}

// references to our images
private Integer[] mThumbIds = {
        //green code: BBE833
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell, R.drawable.green_cell,
        R.drawable.green_cell
};

MyActivity.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_quiz);
    SecureRandom securerandom = new SecureRandom();
    int randomLoop = 15;

    final GridView gridview = (GridView)findViewById(R.id.gridView1);
    final ImageAdapter imageAdapter = new ImageAdapter(this);
    for (int i = 0; i < randomLoop; i++) {
        int position = securerandom.nextInt(25);
        imageAdapter.updateCell(position);
    }
    gridview.setAdapter(imageAdapter);
    gridview.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            //Toast.makeText(QuizActivity.this, "" + position, Toast.LENGTH_SHORT).show();
            imageAdapter.updateCell(position);
            //a = 11;
            gridview.setAdapter(imageAdapter);
        }
    });

p / s：我只是硬编码5x5 感谢。

Answer 1

要获取GridView中的列数，请使用方法getNumColumns()

例如：

gridview.getNumColumns();

http://developer.android.com/reference/android/widget/GridView.html#getNumColumns()

Answer 2

要获取GridLayout中的项目数，请使用getChildCount()方法

Android：如何确定GridView中一行中的项目数

2 个答案: