android GridView显示相同尺寸图片以及预览功能

项目描述：

GridView加载图片，在程序中控制各个图片尺寸一致，点击图片进行预览，可以滑动切换查看不同的界面，可以手势控制图片缩放，效果图如下：



1.GridView控制每个控件大小一致

GridView中的控件大小在程序中控制，思路就是获取屏幕宽高，减去控件之间的空隙，除以每一行控件的个数，就是控件的宽，可以将控件的高设置与宽一致。

首先获取屏幕宽高

public static int  screenWidth;//屏幕宽度

WindowManager windowManager = getWindowManager();

Display display = windowManager.getDefaultDisplay();
Point outSize = new Point();

display.getSize(outSize);

screenWidth = outSize.x;

在GridView的adapter里动态设置控件宽高

PhotoAndFileActivity.java

//动态设置GridView图片的宽高,间距是10，每行两列，计算每个图片的宽度，高度与宽度一致
int width = (PhotoAndFileActivity.screenWidth - (3 * Dp2Px(getActivity(), 10))) / 2;
//width = px2dip(getActivity(),width);
AbsListView.LayoutParams param = new AbsListView.LayoutParams(width, width);
imageView.setLayoutParams(param);

相关代码 PhotoFragment.java：

private GridView gridView;
private ArrayList<String> picUrlsList = new ArrayList<String>();//图片地址

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
density = getActivity().getResources().getDisplayMetrics().density;
//初始数据
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_1.jpg");
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_8.jpg");
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_13.jpg");
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_14.jpg");
picUrlsList.add("http://www.wallcoo.com/nature/Summer_Fantasy_Landscapes/wallpapers/1680x1050/Summer_Fantasy_landscape_by_photo_manipulation_19315669.jpg");
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_17.jpg");
picUrlsList.add("http://www.wosoni.com/image50alluploadpic/DownloadImg/2012/04/0105/22812054_18.jpg");
picUrlsList.add("http://news.mydrivers.com/img/20140218/83a741e3ab4d4ace8bb8b2f7ccafa414_800.jpg");
picUrlsList.add("http://easyread.ph.126.net/GgDmhV_v92sjOpmACcnhQQ==/7916618959919261388.jpg");
picUrlsList.add("http://image.tianjimedia.com/uploadImages/2013/010/941N7G5C3V92_1920x1080.jpg");
View view = inflater.inflate(R.layout.fragment_photos, container, false);
gridView = (GridView) view.findViewById(R.id.id_gridView);

imageAdapter = new ImageAdapter(getActivity());
gridView.setAdapter(imageAdapter);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getActivity(), PhotosDetailActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("position", position);
intent.putStringArrayListExtra("picUrlsList", picUrlsList);
intent.putExtras(bundle);
startActivity(intent);
}
});
ButterKnife.bind(this, view);
return view;

}

@Override
public void onDestroyView() {
super.onDestroyView();
ButterKnife.unbind(this);
}

private class ImageAdapter extends BaseAdapter {
private Context mContext;

public ImageAdapter(Context context) {
this.mContext = context;
}

@Override
public int getCount() {
return picUrlsList.size();
}

@Override
public Object getItem(int position) {
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) {

if (convertView == null) {
convertView = LayoutInflater.from(getActivity()).inflate(R.layout.gridview_item, null);
}
final ImageView imageView = ViewHolder.get(convertView, R.id.imageview);

//动态设置GridView图片的宽高,间距是10，每行两列，计算每个图片的宽度，高度与宽度一致
int width = (PhotoAndFileActivity.screenWidth - (3 * Dp2Px(getActivity(), 10))) / 2;
//width = px2dip(getActivity(),width);
AbsListView.LayoutParams param = new AbsListView.LayoutParams(width, width);
imageView.setLayoutParams(param);

RequestQueue mRequestQueue = VolleySingleton.getVolleySingleton(mContext).getRequestQueue();
String picUrl = picUrlsList.get(position);
if (picUrl == null) {
picUrl = "";
}
ImageRequest imageRequest = new ImageRequest(
picUrl,
new Response.Listener<Bitmap>() {
@Override
public void onResponse(Bitmap response) {
imageView.setImageBitmap(response);
}
}, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
imageView.setImageBitmap(null);
}
});
mRequestQueue.add(imageRequest);
return convertView;
}

}

public static int Dp2Px(Context context, float dp) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dp * scale + 0.5f);
}

相关布局：

gridview_item.xml

<?xml version="1.0" encoding="utf-8"?>

<ImageView
android:id="@+id/imageview"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"/>

fragment_photos.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/white">

<GridView
android:id="@+id/id_gridView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:horizontalSpacing="10dp"
android:numColumns="2"
android:layout_margin="10dp"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" />

</LinearLayout>

参考文章

2.图片预览与缩放

切换views，使用的是ViewPager，图片的切换，使用的是第三方库：PhotoView,下载地址，

相关代码：

PhotosDetailActivity.java

public class PhotosDetailActivity extends BaseActivity implements TitleLayout.titleLayoutClick{

@Bind(R.id.id_titleLayot)
TitleLayout mIdTitleLayot;
@Bind(R.id.viewPager)
HackyViewPager mViewPager;
@Bind(R.id.id_imageViewDelete)
ImageView mIdImageViewDelete;
@Bind(R.id.id_imageViewEdit)
ImageView mIdImageViewEdit;
public int i_position = 0;
private ArrayList<String> picUrlsList;//图片网址
private List<View> viewList;//view数组

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photos_detail);
ButterKnife.bind(this);

mIdTitleLayot.setLinearLeftImage(R.mipmap.back);

//通过Intent得到GridView传过来的图片位置
Intent intent = getIntent();
i_position = intent.getIntExtra("position", 0);
picUrlsList = intent.getStringArrayListExtra("picUrlsList");
mIdTitleLayot.setTitle((i_position + 1) + "/" + picUrlsList.size());

LayoutInflater inflater = getLayoutInflater();

viewList = new ArrayList<View>();// 将要分页显示的View装入数组中
for (int i = 0; i < picUrlsList.size(); i++) {
//第三方库，支持ImageView缩放
View view = inflater.inflate(R.layout.photos_detail, null);

final PhotoView imageView = (PhotoView) view.findViewById(R.id.id_imageViewShow);
final ImageView imageViewPerson = (ImageView) view.findViewById(R.id.id_imageViewPerson);
final TextView textViewName = (TextView) view.findViewById(R.id.id_textViewName);
final TextView textViewDate = (TextView) view.findViewById(R.id.id_textViewDate);
final TextView textViewDetail = (TextView) view.findViewById(R.id.id_textViewDetail);

RequestQueue mRequestQueue = VolleySingleton.getVolleySingleton(PhotosDetailActivity.this).getRequestQueue();

ImageRequest imageRequest = new ImageRequest(
"http://hiphotos.baidu.com/wisegame/pic/item/29ed2e738bd4b31c1839b19686d6277f9e2ff892.jpg",
new Response.Listener<Bitmap>() {
@Override
public void onResponse(Bitmap response) {
imageViewPerson.setImageBitmap(response);
}
}, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
imageViewPerson.setImageBitmap(null);
}
});
mRequestQueue.add(imageRequest);
textViewName.setText("李工" + i);
textViewDate.setText("2016-04-21 14:09:30");
textViewDetail.setText("详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情详情");

ImageRequest imageRequest2 = new ImageRequest(
picUrlsList.get(i),
new Response.Listener<Bitmap>() {
@Override
public void onResponse(Bitmap response) {
imageView.setImageBitmap(response);
}
}, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
imageView.setImageBitmap(null);
}
});
mRequestQueue.add(imageRequest2);

viewList.add(view);
}

PagerAdapter pagerAdapter = new PagerAdapter() {

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return viewList.size();
}

@Override
public void destroyItem(ViewGroup container, int position,
Object object) {
// TODO Auto-generated method stub
container.removeView(viewList.get(position));
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
// TODO Auto-generated method stub

container.addView(viewList.get(position));

return viewList.get(position);
}
};
mViewPager.setAdapter(pagerAdapter);
mViewPager.setCurrentItem(i_position);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
mIdTitleLayot.setTitle((position + 1) + "/" + picUrlsList.size());
}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}

@Override
public void leftViewClick() {
finish();
}

@Override
public void rightViewClick() {

}
}

其中BaseActivity .java与TitleLayout的接口之类的，与本功能不相干，可以不考虑

布局文件：

activity_photos_detail.xml

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

<boerpower.com.electricmanager.Tools.TitleLayout
android:id="@+id/id_titleLayot"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<boerpower.com.electricmanager.Activities.ProjectDetail.HackyViewPager
android:id="@+id/viewPager"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"/>

<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/gray"/>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#efeff4">

<ImageView
android:id="@+id/id_imageViewDelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginBottom="10dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:src="@mipmap/photo_delete"/>

<ImageView
android:id="@+id/id_imageViewEdit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginBottom="10dp"
android:layout_marginRight="5dp"
android:layout_marginTop="10dp"
android:src="@mipmap/photo_edit"/>
</RelativeLayout>
</LinearLayout>

photos_detail.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">

<uk.co.senab.photoview.PhotoView
android:id="@+id/id_imageViewShow"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="10dp"
android:scaleType="fitXY"
android:layout_weight="1"/>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:gravity="center"
android:orientation="horizontal">

<ImageView
android:id="@+id/id_imageViewPerson"
android:layout_width="53dp"
android:layout_height="53dp"
android:layout_marginRight="10dp"/>

<TextView
android:id="@+id/id_textViewName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:textColor="@color/black"
android:textSize="16sp"/>

<TextView
android:id="@+id/id_textViewDate"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#898989"
android:textSize="12sp"/>
</LinearLayout>

<TextView
android:id="@+id/id_textViewDetail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:ellipsize="end"
android:maxLines="3"/>

</LinearLayout>

其中HackyViewPager.java是继承了ViewPager类，主要是因为，在 PhotoView + ViewPager出现 ArrayIndexOutOfBoundsException，参考解决方法解决方法

HackyViewPager.java

/**
* Created by Administrator on 2016/5/5 0005.
* 配合PhotoView第三方库使用，防止出现崩溃
*/
public class HackyViewPager extends ViewPager {

public HackyViewPager(Context context)
{
super(context);
}

public HackyViewPager(Context context, AttributeSet attrs)
{
super(context, attrs);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev)
{
try
{
return super.onInterceptTouchEvent(ev);
}
catch (IllegalArgumentException e)
{
}
catch (ArrayIndexOutOfBoundsException e)
{

}
return false;
}
}

访问网络图片使用的Volley

先写这些