java - 如何在android中动态使用总行数和总列数创建网格

Question

我是安卓新手。我想根据总行数和列数构建一个网格并显示在 View 中。创建网格后，我需要将图标放置在其中一个网格中。该图标将来自服务器 URL。网格应该像下面这样。

创建的网格应该适合屏幕。我怎么做？有人可以给我一个代码示例吗？提前致谢!!!

Answer 1

res/layout/gridview_android_example_with_image.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <GridView
        android:id="@+id/gridview_android_example"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:columnWidth="100dp"
        android:gravity="center"
        android:minHeight="90dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth" />

</LinearLayout>

AndroidGridViewDisplayImages.java

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class AndroidGridViewDisplayImages extends AppCompatActivity {

    GridView androidGridView;


// Dummy Array of images (Replace with your own values)
    Integer[] imageIDs = {
            R.drawable.email, R.drawable.mobile, R.drawable.alram,
            R.drawable.android, R.drawable.wordpress, R.drawable.web,
            R.drawable.email, R.drawable.mobile, R.drawable.alram,
            R.drawable.android, R.drawable.wordpress, R.drawable.web,
            R.drawable.email, R.drawable.mobile, R.drawable.alram,
            R.drawable.android, R.drawable.wordpress, R.drawable.web,
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gridview_android_example_with_image);

        androidGridView = (GridView) findViewById(R.id.gridview_android_example);
        androidGridView.setAdapter(new ImageAdapterGridView(this));

        androidGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent,
                                    View v, int position, long id) {
                Toast.makeText(getBaseContext(), "Grid Item " + (position + 1) + " Selected", Toast.LENGTH_LONG).show();
            }
        });

    }

    public class ImageAdapterGridView extends BaseAdapter {
        private Context mContext;

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

        public int getCount() {
            return imageIDs.length;
        }

        public Object getItem(int position) {
            return null;
        }

        public long getItemId(int position) {
            return 0;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView mImageView;

            if (convertView == null) {
                mImageView = new ImageView(mContext);
                mImageView.setLayoutParams(new GridView.LayoutParams(130, 130));
                mImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
                mImageView.setPadding(16, 16, 16, 16);
            } else {
                mImageView = (ImageView) convertView;
            }
            mImageView.setImageResource(imageIDs[position]);
            return mImageView;
        }
    }
}