一：基本效果
1. 拍照------>获取略缩图并加载到布局上
2. 相册选取(9张一次)------------->可以预览缩放-------->获取略缩图并加载到布局上
3. 点击略缩图预览大图，移动缩放，可以删除图片
```
引入依赖：
implementation'me.iwf.photopicker:PhotoPicker:0.1.8'
implementation'com.github.bumptech.glide:glide:3.6.1'
implementation'com.commit451:PhotoView:1.2.4'
```
allprojects {
repositories {
jcenter()
maven { url"https://jitpack.io" }
}
}
二：效果图（九宫格选择，在MainActivity里打开choosePhoto方法即可，效果图就先不放了）
三：核心代码
1）MainActivity
public class MainActivity extends AppCompatActivity {
private Stringfilename;
private Stringname;
Buttonbtn_photo;
private static final int REQUEST_CODE =100;
private NoScrollGridViewitemLayout;
private ArrayListphotos;
private Listphotossss;
private NinePicturesAdapterninePicturesAdapter;
protected ArrayListaddresses =new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//创建监听器 绑定Button资源
btn_photo = (Button) findViewById(R.id.btn_photo);
//设置Button监听
btn_photo.setOnClickListener(new MyButtonListener());
filename = Environment.getExternalStorageDirectory().getAbsolutePath() +"/photos/";
//为不可滑动GridView设置适配器
itemLayout = (NoScrollGridView) findViewById(R.id.recycler_view);
//九宫格图片适配器，一次最多选择9张图片
ninePicturesAdapter =new NinePicturesAdapter(this,9,new NinePicturesAdapter.OnClickAddListener() {
@Override
public void onClickAdd(int positin) {
//choosePhoto();
takephoto();
}
},new NinePicturesAdapter.OnItemClickAddListener() {
@Override
public void onItemClick(int positin) {
Log.i(TAG,"------------onItemClick: "+positin);
//得到图片Url
String[] array =new String[ninePicturesAdapter.getPhotoCount()];
// List转换成数组
for (int i =0; i
array[i] =photossss.get(i);
}
Log.i(TAG,"----array:--- "+array.length);
//Toast.makeText(MainActivity.this,"查看大图",Toast.LENGTH_SHORT).show();
//查看大图
imageBrower(positin,array);
}
});
//不可滑动GridView设置为九宫格格式
itemLayout.setAdapter(ninePicturesAdapter);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//在这保存 name 的数据
outState.putString("name",name);
}
//读取数据
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
name = savedInstanceState.getString("name");
}
//实现OnClickListener接口
private class MyButtonListenerimplements View.OnClickListener {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"打开了相机",Toast.LENGTH_SHORT).show();
//拍照
takephoto();
}
}
//拍照
private void takephoto() {
//判断是否有相机
boolean b = PhotoUtils.hasCamera(MainActivity.this);
if (b) {
name = getPhotoFileName();
File mFile =new File(filename);
if (!mFile.exists()) {
mFile.mkdirs();
}
File mPhotoFile =new File(filename,name);
//启动相机
Intent captureIntent =new Intent("android.media.action.IMAGE_CAPTURE");
Uri fileUri = FileProvider.getUriForFile(MainActivity.this,"com.an.myphotodemo.fileprovider", mPhotoFile);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT,fileUri);
startActivityForResult(captureIntent,0);
}else {
Toast.makeText(MainActivity.this,"系统无相机", Toast.LENGTH_SHORT).show();
}
}
//设置拍照后图片名称
private String getPhotoFileName() {
Date date =new Date(System.currentTimeMillis());
SimpleDateFormat dateFormat =new SimpleDateFormat(
"'IMG'_yyyyMMdd_HH-mm-ss");
return dateFormat.format(date) +".jpg";
}
/**
* 每一张图片放大查看
* @param position
* @param urls
*/
private void imageBrower(int position, String[] urls) {
Intent intent =new Intent(this, ImagePagerActivity.class);
// 图片url,为了演示这里使用常量，一般从数据库中或网络中获取
intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_URLS, urls);
intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_INDEX, position);
startActivity(intent);
}
/**
* 开启图片选择器
*/
private void choosePhoto() {
PhotoPickerIntent intent =new PhotoPickerIntent(MainActivity.this);
intent.setPhotoCount(9);
intent.setShowCamera(true);
startActivityForResult(intent,REQUEST_CODE);
//ImageLoaderUtils.display(context,imageView,path);
}
private static final StringTAG ="MainActivity";
/**
* 接受返回的图片数据
* @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(int requestCode,int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//获取到相机拍的照片
if (requestCode==0) {
String filestr =filename +"/" +name;
//向flowlayout中添加图片
//调试打印照相图片路径
System.out.println("=========================1=============================");
System.out.println(filestr);
if(ninePicturesAdapter!=null) {
//将String类型转换成ListArray
List addresses = Arrays.asList(filestr);
//九宫格里添加图片
ninePicturesAdapter.addAll(addresses);
photossss =ninePicturesAdapter.getData();
}
}
//获取到相册里的图片
else if (resultCode ==RESULT_OK && requestCode ==REQUEST_CODE) {
if (data !=null) {
photos = data.getStringArrayListExtra(PhotoPickerActivity.KEY_SELECTED_PHOTOS);
for (int i =0; i
Log.i(TAG,"----------onActivityResult: "+photos.get(i));
}
if(ninePicturesAdapter!=null) {
Log.i(TAG,"----------photossss: ========");
//九宫格里添加图片
ninePicturesAdapter.addAll(photos);
//相册照片路径打印
Log.i(TAG,"==========================================================");
System.out.println(photos);
photossss =ninePicturesAdapter.getData();
Log.i(TAG,"----------photossss: ========"+photossss.size());
}
}
}
}
}
2)ImageLoaderUtils：图片加载工具类 使用glide框架封装，将图片加载到Gridview
public class ImageLoaderUtils {
public static void display(Context context, ImageView imageView, String url,int placeholder,int error) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url).placeholder(placeholder)
.error(error).crossFade().into(imageView);
}
public static void display(Context context, ImageView imageView, String url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url)
.diskCacheStrategy(DiskCacheStrategy.ALL)
.fitCenter()
.placeholder(R.drawable.ic_image_loading)
.error(R.drawable.ic_empty_picture)
.crossFade().into(imageView);
}
public static void display(Context context, ImageView imageView, File url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url)
.diskCacheStrategy(DiskCacheStrategy.ALL)
.fitCenter()
.placeholder(R.drawable.ic_image_loading)
.error(R.drawable.ic_empty_picture)
.crossFade().into(imageView);
}
public static void displaySmallPhoto(Context context, ImageView imageView, String url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url).asBitmap()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.placeholder(R.drawable.ic_image_loading)
.error(R.drawable.ic_empty_picture)
.thumbnail(0.5f)
.into(imageView);
}
public static void displayBigPhoto(Context context, ImageView imageView, String url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url).asBitmap()
.format(DecodeFormat.PREFER_ARGB_8888)
.diskCacheStrategy(DiskCacheStrategy.ALL)
.placeholder(R.drawable.ic_image_loading)
.error(R.drawable.ic_empty_picture)
.into(imageView);
}
public static void display(Context context, ImageView imageView,int url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url)
.diskCacheStrategy(DiskCacheStrategy.ALL)
//.fitCenter()
.placeholder(R.drawable.ic_image_loading)
.error(R.drawable.ic_empty_picture)
.crossFade().into(imageView);
}
public static void displayRound(Context context, ImageView imageView, String url) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(url)
.diskCacheStrategy(DiskCacheStrategy.ALL)
.error(R.drawable.toux2)
.fitCenter().transform(new GlideRoundTransformUtil(context)).into(imageView);
}
public static void displayRound(Context context, ImageView imageView,int resId) {
if (imageView ==null) {
throw new IllegalArgumentException("argument error");
}
Glide.with(context).load(resId)
.diskCacheStrategy(DiskCacheStrategy.ALL)
.error(R.drawable.toux2)
.fitCenter().transform(new GlideRoundTransformUtil(context)).into(imageView);
}
}
3)xml
1>image_detail_pager.xml
android:layout_width="match_parent"
android:layout_height="match_parent" >
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
android:id="@+id/btn_back1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="返回" />
android:id="@+id/indicator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:gravity="center"
android:textSize="18sp"
android:textColor="@android:color/white"
android:text="@string/viewpager_indicator"
android:background="@android:color/transparent" />
2>image_detail_fragment.xml
android:layout_width="match_parent"
android:layout_height="match_parent"
>
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitCenter"
/>
说明一下，上面俩个xml文件分别对应viewpage 和 photoview，一个用来滑动页，一个具体的放缩
具体源码请移步我的GitHub - nikezzy1/photoDemo