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gridview是一项显示二维的viewgroup,可滚动的网格。网格项时自动插入的布局使用listadapter。
1.创建一个新的项目:gridview.
2,打开 res/layout/main.xml文件,插入一下代码:
做好以后就可以在屏幕上显示一个grid view
3.打开gridview.java
首先要导入包:
package cn.gridview; import android.widget.GridView; import android.widget.Toast; import android.app.Activity; import android.os.Bundle; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView; import android.view.View; 在onCreate添加方法: public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); GridView gridview=(GridView)findViewById(R.id.gridview);//找到main.xml中定义gridview 的id gridview.setAdapter(new ImageAdapter(this));//调用ImageAdapter.java gridview.setOnItemClickListener(new OnItemClickListener(){//监听事件 public void onItemClick(AdapterView parent, View view, int position, long id) { Toast.makeText(gridview.this, ""+position,Toast.LENGTH_SHORT).show();//显示信息; } }); } ImageAdapter.java package cn.gridview; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.content.Context; import android.widget.ImageView; import android.widget.GridView; public class ImageAdapter extends BaseAdapter { private Context mContext; public ImageAdapter(Context c) { mContext=c; } @Override public int getCount() { // TODO Auto-generated method stub 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) { // TODO Auto-generated method stub ImageView imageview; if(convertView==null) { imageview=new ImageView(mContext); imageview.setLayoutParams(new GridView.LayoutParams(85, 85)); imageview.setScaleType(ImageView.ScaleType.CENTER_CROP); imageview.setPadding(8,8,8,8); } else { imageview=(ImageView) convertView; } imageview.setImageResource(mThumbIds[position]); return imageview; } private Integer[] mThumbIds={//显示的图片数组 R.drawable.sample_2,R.drawable.sample_3, R.drawable.sample_4,R.drawable.sample_5, R.drawable.sample_6,R.drawable.sample_7, R.drawable.sample_0,R.drawable.sample_1, R.drawable.sample_2,R.drawable.sample_3, R.drawable.sample_4,R.drawable.sample_5, R.drawable.sample_6,R.drawable.sample_7, R.drawable.sample_0,R.drawable.sample_1, R.drawable.sample_2,R.drawable.sample_3, R.drawable.sample_4,R.drawable.sample_5, R.drawable.sample_6,R.drawable.sample_7, }; }
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