Android开发中GridView用法示例

2023-09-22 22:58:06 52

packagecom.yarin.android.Examples_04_19; importandroid.content.Context; importandroid.view.View; importandroid.view.ViewGroup; importandroid.widget.BaseAdapter; importandroid.widget.GridView; importandroid.widget.ImageView; publicclassImageAdapterextendsBaseAdapter { //定义Context privateContextmContext; //定义整型数组即图片源 privateInteger[]mImageIds= { R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6, R.drawable.img7, R.drawable.img8, R.drawable.img1, }; publicImageAdapter(Contextc) { mContext=c; } //获取图片的个数 publicintgetCount() { returnmImageIds.length; } //获取图片在库中的位置 publicObjectgetItem(intposition) { returnposition; } //获取图片ID publiclonggetItemId(intposition) { returnposition; } publicViewgetView(intposition,ViewconvertView,ViewGroupparent) { ImageViewimageView; if(convertView==null) { //给ImageView设置资源 imageView=newImageView(mContext); //设置布局图片120×120显示 imageView.setLayoutParams(newGridView.LayoutParams(85,85)); //设置显示比例类型 imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); } else { imageView=(ImageView)convertView; } imageView.setImageResource(mImageIds[position]); returnimageView; } }

packagecom.yarin.android.Examples_04_19; importandroid.app.Activity; importandroid.os.Bundle; importandroid.view.View; importandroid.widget.AdapterView; importandroid.widget.GridView; importandroid.widget.Toast; importandroid.widget.AdapterView.OnItemClickListener; publicclassActivity01extendsActivity { /**Calledwhentheactivityisfirstcreated.*/ @Override publicvoidonCreate(BundlesavedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //取得GridView对象 GridViewgridview=(GridView)findViewById(R.id.gridview); //添加元素给gridview gridview.setAdapter(newImageAdapter(this)); //设置Gallery的背景 gridview.setBackgroundResource(R.drawable.bg0); //事件监听 gridview.setOnItemClickListener(newOnItemClickListener(){ publicvoidonItemClick(AdapterViewparent,Viewv,intposition,longid) { Toast.makeText(Activity01.this,"你选择了"+(position+1)+"号图片",Toast.LENGTH_SHORT).show(); } }); } }

Android开发中GridView用法示例

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