如何在GridView中增加图象？ [英] how to add images on gridview?
本文介绍了如何在GridView中增加图象？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在此以下的GridView image.png 图像从拍摄绘制 folder.Now我想从图像照相馆或捕捉的相机图像动态地添加在这个grid.How办？
在任何例如code？
HelloGridView类：
包com.example.HelloGridView;
进口android.app.Activity;
进口android.os.Bundle;
公共类HelloGridView延伸活动{
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;
GridView控件的GridView =（GridView控件）findViewById（R.id.gridview）;
gridview.setAdapter（新ImageAdapter（本））;
gridview.setOnItemClickListener（新OnItemClickListener（）{
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V，INT位置，长的id）{
Toast.makeText（HelloGridView.this，+位置，Toast.LENGTH_SHORT）.show（）;
}
}）;
}
ImageAdapter类：
包com.example.HelloGridView;
公共类ImageAdapter扩展了BaseAdapter {
私人语境mContext;
公共ImageAdapter（上下文C）{
mContext = C;
}
公众诠释getCount将（）{
返回mThumbIds.length;
}
公共对象的getItem（INT位置）{
返回null;
}
众长getItemId（INT位置）{
返回0;
}
//创建由适配器引用的每个项目的新的ImageView
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
如果（convertView == NULL）{//如果它不回收，初始化一些属性
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（85，85））;
imageView.setScaleType（ImageView.ScaleType.CENTER_CROP）;
imageView.setPadding（8,8，8,8）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
imageView.setImageResource（mThumbIds [位置]）;
返回ImageView的;
}
//引用到我们的形象
私人整数[] mThumbIds = {
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
};
解决方案
把图像文件夹[图片]在SD卡
公共类ChannelImageAdapter扩展了BaseAdapter {
INT mGalleryItemBackground;
私人语境mContext;
文件[]的图像;
文件[]文件;
公共ChannelImageAdapter（上下文C中，int folderID）{
mContext = C;
文件DIR =新的文件（Environment.getExternalStorageDirectory（）+/图片）;
文件= dir.listFiles（）;
照片=文件[folderID] .listFiles（）;
}
公众诠释getCount将（）{
返回images.length;
}
公共对象的getItem（INT位置）{
返回图片[位置] .getAbsolutePath（）;
}
众长getItemId（INT位置）{
返回的位置;
}
公共字符串getAlbumName（INT folderID）{
返回文件[folderID] .getName（）;
}
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
//位图BM = BitmapFactory
// .DE codeFILE（图片[位置] .getAbsolutePath（））;
如果（convertView == NULL）{
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（100，100））;
imageView.setScaleType（ImageView.ScaleType.FIT_XY）;
imageView.setPadding（5，10，5，10）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
imageView.setImageBitmap（Bitmap.de code（图片[位置] .getAbsoluteFile（）））;
返回ImageView的;
}
}
In this following gridview image.png images are taken from the drawable folder.Now I want the images from the photo gallery or captured camera image add dynamically in this grid.How to do?
Any example code?
HelloGridView class:
package com.example.HelloGridView;
import android.app.Activity;
import android.os.Bundle;
public class HelloGridView extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(HelloGridView.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
ImageAdapter class:
package com.example.HelloGridView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
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(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
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
};
解决方案
Put images in the folder[images ] in SD card
public class ChannelImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
File[] images;
File[] files;
public ChannelImageAdapter(Context c, int folderID) {
mContext = c;
File dir = new File(Environment.getExternalStorageDirectory() + "/images");
files = dir.listFiles();
images = files[folderID].listFiles();
}
public int getCount() {
return images.length;
}
public Object getItem(int position) {
return images[position].getAbsolutePath();
}
public long getItemId(int position) {
return position;
}
public String getAlbumName(int folderID) {
return files[folderID].getName();
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
//Bitmap bm = BitmapFactory
// .decodeFile(images[position].getAbsolutePath());
if (convertView == null) {
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(100, 100));
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setPadding(5, 10, 5, 10);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageBitmap(Bitmap.decode(images[position].getAbsoluteFile()));
return imageView;
}
}
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