android自定义相册的功能实现
做java开发的也会接触到android开发。前段时间我在做android开发时候遇到一个问题就是自定义相册。
其实简单来说分两步：第一，先查询出本机所有图片的路径。第二，把查询出的路径放到GridView控件里面。
接下来上具体的代码了：
1.取图片路径：
/**
* 图片文件路径
*/
private ArrayList
/**
* 查询系统所有图片地址
*/
private void serchPhoto() {
filePath.clear();
new Thread(new Runnable() {
@Override
public void run() {
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = getContentResolver();
// 只查询jpeg和png的图片
Cursor mCursor = mContentResolver.query(mImageUri, null,
MediaStore.Images.Media.MIME_TYPE + "=? or "
+ MediaStore.Images.Media.MIME_TYPE + "=?"
+ " or " + MediaStore.Images.Media.MIME_TYPE
+ "=?", new String[]{"image/jpeg",
"image/png", "image/jpg"},
MediaStore.Images.Media.DATE_MODIFIED);
Log.e("TAG", mCursor.getCount() + "===" +filePath.toString());
while (mCursor.moveToNext()) {
// 获取图片的路径
String path = mCursor.getString(mCursor
.getColumnIndex(MediaStore.Images.Media.DATA));
Log.v("dongjie", "path==" + path);
filePath.add(path);
}
mCursor.close();
Message msg = Message.obtain();
//msg.obj = json;
msg.what = 0x110;
handler.sendMessage(msg);
}
}).start();
}
2.新建一个photoActivity 再新建一个对应的adpter适配器MoreChatAdpter 还有布局文件photo.xml
photo.xml :
android:layout_height="fill_parent"
android:background="#F3F4F5"
android:orientation="vertical" >
android:layout_height="50dp"
android:background="@android:color/white" >
android:layout_height="19dp"
android:layout_centerInParent="true"
android:layout_centerVertical="true"
android:text="相册"
android:textColor="#333333"
android:textSize="16sp" />
android:layout_width="60dp"
android:layout_height="24dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:background="@color/all_white"
android:text="取消"
android:textColor="@android:color/background_dark" />
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="@android:color/transparent"
android:clipChildren="true"
android:gravity="center"
android:horizontalSpacing="1dip"
android:listSelector="@android:color/transparent"
android:numColumns="4"
android:stretchMode="columnWidth"
android:verticalSpacing="1dip" />
MoreChatAdpter.java :
/**
* 相册适配器
* @author dongkaiming
*/
public class MoreChatAdpter extends BaseAdapter {
public List
private LayoutInflater layoutInflater;
private Context context;
public MoreChatAdpter(Context context, List
layoutInflater = LayoutInflater.from(context);
this.filePath = filePath;
this.context = context;
}
@Override
public int getCount() {
if (filePath == null) {
return 1;
}
return filePath.size() + 1;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return filePath.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
HolderView holderView = null;
if (convertView == null) {
holderView = new HolderView();
convertView = layoutInflater.inflate(R.layout.grid_item, null);
holderView.photoImage = (ImageView) convertView
.findViewById(R.id.id_item_image);
holderView.selectImage = (ImageView) convertView
.findViewById(R.id.id_select_item);
holderView.img_camner= convertView.findViewById(R.id.img_camner);
setHeight(holderView.photoImage);
convertView.setTag(holderView);
}
holderView = (HolderView) convertView.getTag();
if(position==0){
holderView.img_camner.setVisibility(View.VISIBLE);
setHeight(holderView.img_camner);
}else{
File file = new File(filePath.get(position-1));
Glide.with(context).load(file).centerCrop().crossFade()
.into(holderView.photoImage);
holderView.img_camner.setVisibility(View.GONE);
}
return convertView;
}
/**
* 设值每张相片的高度
* @param view
*/
public void setHeight(View view) {
LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
layoutParams.height = getLayoutHeight();
view.setLayoutParams(layoutParams);
}
public void setWidth(View view){
LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
layoutParams.width = getLayoutWidth();
view.setLayoutParams(layoutParams);
}
/**
* 预设值每张相片的高度
*/
public int getLayoutHeight() {
int width = Tools.getScreenWidth() - 2 * 4;
return width / 4;
}
public int getLayoutWidth(){
int width = Tools.getScreenWidth() - 2 * 4;
return width / 4;
}
/**
* view mode
* @author dongkaiming
*/
public class HolderView {
public ImageView photoImage;
public ImageView selectImage;
public View img_camner;
}
}
最后在photoActivity.java 里的onCreate()方法里面实例化MoreChatAdpter并传入对应的参数即可。
path = intent.getStringArrayListExtra("path"); //path就是上面查询的图片路径。
MoreChatAdpter moreChatAdpter = new MoreChatAdpter(this, path);
好了，就是这样，请大家指教！