Android实现图片选择上传功能实例

package com.yechaoa.uploadimage; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.GridLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.AdapterView; import com.lzy.imagepicker.ImagePicker; import com.lzy.imagepicker.bean.ImageItem; import com.lzy.imagepicker.ui.ImageGridActivity; import com.lzy.imagepicker.ui.ImagePreviewDelActivity; import com.lzy.imagepicker.view.CropImageView; import java.util.ArrayList; import java.util.List; import okhttp3.Call; public class MainActivity extends AppCompatActivity implements ImagePickerAdapter.OnRecyclerViewItemClickListener{   public static final int IMAGE_ITEM_ADD = -1;   public static final int REQUEST_CODE_SELECT = 100;   public static final int REQUEST_CODE_PREVIEW = 101;   private ImagePickerAdapter adapter;   private ArrayList<ImageItem> selImageList; //当前选择的所有图片   private int maxImgCount = 8;        //允许选择图片最大数   private HttpUtil httpUtil;   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     httpUtil = new HttpUtil();     findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() {       @Override       public void onClick(View v) {         uploadImage(selImageList);       }     });     //最好放到 Application oncreate执行     initImagePicker();     initWidget();   }   private void initImagePicker() {     ImagePicker imagePicker = ImagePicker.getInstance();     imagePicker.setImageLoader(new GlideImageLoader());  //设置图片加载器     imagePicker.setShowCamera(true);           //显示拍照按钮     imagePicker.setCrop(true);              //允许裁剪（单选才有效）     imagePicker.setSaveRectangle(true);          //是否按矩形区域保存     imagePicker.setSelectLimit(maxImgCount);       //选中数量限制     imagePicker.setMultiMode(false);           //多选     imagePicker.setStyle(CropImageView.Style.RECTANGLE); //裁剪框的形状     imagePicker.setFocusWidth(800);            //裁剪框的宽度。单位像素（圆形自动取宽高最小值）     imagePicker.setFocusHeight(800);           //裁剪框的高度。单位像素（圆形自动取宽高最小值）     imagePicker.setOutPutX(1000);             //保存文件的宽度。单位像素     imagePicker.setOutPutY(1000);             //保存文件的高度。单位像素   }   private void initWidget() {     RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);     selImageList = new ArrayList<>();     adapter = new ImagePickerAdapter(this, selImageList, maxImgCount);     adapter.setOnItemClickListener(this);      recyclerView.setLayoutManager(new GridLayoutManager(this, 4));     recyclerView.setHasFixedSize(true);     recyclerView.setAdapter(adapter);   }    private SelectDialog showDialog(SelectDialog.SelectDialogListener listener, List<String> names) {     SelectDialog dialog = new SelectDialog(this, R.style.transparentFrameWindowStyle, listener, names);     if (!this.isFinishing()) {       dialog.show();     }     return dialog;   }  @Override   public void onItemClick(View view, int position) {     switch (position) {       case IMAGE_ITEM_ADD:         List<String> names = new ArrayList<>();         names.add("拍照");         names.add("相册");         showDialog(new SelectDialog.SelectDialogListener() {           @Override           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {             switch (position) {               case 0: // 直接调起相机                 //打开选择,本次允许选择的数量                 ImagePicker.getInstance().setSelectLimit(maxImgCount - selImageList.size());                 Intent intent = new Intent(MainActivity.this, ImageGridActivity.class);                 intent.putExtra(ImageGridActivity.EXTRAS_TAKE_PICKERS,true); // 是否是直接打开相机                 startActivityForResult(intent, REQUEST_CODE_SELECT);                 break;               case 1:                 //打开选择,本次允许选择的数量                 ImagePicker.getInstance().setSelectLimit(maxImgCount - selImageList.size());                 Intent intent1 = new Intent(MainActivity.this, ImageGridActivity.class);                 startActivityForResult(intent1, REQUEST_CODE_SELECT);                 break;               default:                 break;             }           }         }, names);         break;       default:         //打开预览         Intent intentPreview = new Intent(this, ImagePreviewDelActivity.class);         intentPreview.putExtra(ImagePicker.EXTRA_IMAGE_ITEMS, (ArrayList<ImageItem>) adapter.getImages());         intentPreview.putExtra(ImagePicker.EXTRA_SELECTED_IMAGE_POSITION, position);         intentPreview.putExtra(ImagePicker.EXTRA_FROM_ITEMS,true);         startActivityForResult(intentPreview, REQUEST_CODE_PREVIEW);         break;     }   }   @Override   protected void onActivityResult(int requestCode, int resultCode, Intent data) {     super.onActivityResult(requestCode, resultCode, data);     if (resultCode == ImagePicker.RESULT_CODE_ITEMS) {       //添加图片返回       if (data != null && requestCode == REQUEST_CODE_SELECT) {         ArrayList<ImageItem> images = (ArrayList<ImageItem>) data.getSerializableExtra(ImagePicker.EXTRA_RESULT_ITEMS);         if (images != null){           selImageList.addAll(images);           adapter.setImages(selImageList);         }       }     } else if (resultCode == ImagePicker.RESULT_CODE_BACK) {       //预览图片返回       if (data != null && requestCode == REQUEST_CODE_PREVIEW) {         ArrayList<ImageItem> images = (ArrayList<ImageItem>) data.getSerializableExtra(ImagePicker.EXTRA_IMAGE_ITEMS);         if (images != null){           selImageList.clear();           selImageList.addAll(images);           adapter.setImages(selImageList);         }       }     }   }   private String url="http...";    private void uploadImage(ArrayList<ImageItem> pathList) {     httpUtil.postFileRequest(url, null, pathList, new MyStringCallBack() {        @Override       public void onError(Call call, Exception e, int id) {         super.onError(call, e, id);       }      @Override       public void onResponse(String response, int id) {         super.onResponse(response, id);         //返回图片的地址       }     });   }}