Android仿微信发表说说实现拍照、多图上传功能

本文实例为大家分享了android仿微信发表说说、心情功能，供大家参考，具体内容如下

既能实现拍照，选图库，多图案上传的案例，目前好多app都有类似微信朋友圈的功能，能过发表说说等附带图片上传。下面的就是实现该功能的过程：大家还没有看过android retrofit 2.0框架上传图片解决方案这篇文章，在看今天的就很容易，接在本项目中用到了一个library：photopicker，封装了图片的选择功能，是否选相机，还有选中图片后可以查看图片的功能。 

 一、 首先：将photopicker到工程中
（1）、先简单讲解一下photopickerintent的用法：         

photopickerintent intent = new photopickerintent(mainactivity.this); 
 intent.setselectmodel(selectmodel.multi); // 
 intent.setshowcarema(true); // 是否显示拍照 
 intent.setmaxtotal(6); // 最多选择照片数量，默认为6 
 intent.setselectedpaths(imagepaths); // 已选中的照片地址， 用于回显选中状态 
 startactivityforresult(intent, request_camera_code); 

（2）、设置好之后，重写onactivityresult方法处理选中图片和预览加载适配器

@override 
 protected void onactivityresult(int requestcode, int resultcode, intent data) { 
 super.onactivityresult(requestcode, resultcode, data); 
 if(resultcode == result_ok) { 
 switch (requestcode) { 
 // 选择照片 
 case request_camera_code: 
  loadadpater(data.getstringarraylistextra(photopickeractivity.extra_result)); 
  break; 
 // 预览 
 case request_preview_code: 
  loadadpater(data.getstringarraylistextra(photopreviewactivity.extra_result)); 
  break; 
 } 
 } 
 } 

 二、重点在gridadapter

 (1)、定义一个变量 mmaxposition，
 (2)、写一个获取最大位置的方法：用来获取item的最大位置。

 //重点在这里，当position==mmaxposition-1让"+"选择图片的默认图片显示。 
 //当目前最多6中图片，则最大7时，图片影藏。 
 if (position==mmaxposition-1) { 
 holder.image.setimageresource(r.mipmap.ic_launcher); 
 holder.image.setvisibility(view.visible); 
 if(position==6&&mmaxposition==7){ 
 holder.image.setimageresource(r.mipmap.ic_launcher); 
 holder.image.setvisibility(view.gone); 
 } 
 } else { 
 final string path=listurls.get(position); 
 glide.with(mainactivity.this) 
 .load(new file(path)) 
 .placeholder(r.mipmap.default_error) 
 .error(r.mipmap.default_error) 
 .centercrop() 
 .crossfade() 
 .into(holder.image); 
} 

（3）、关于图片的显示：

 private class gridadapter extends baseadapter{ 
 private arraylist<string> listurls; 
 private int mmaxposition; 
 private layoutinflater inflater; 
 public gridadapter(arraylist<string> listurls) { 
 this.listurls = listurls; 
 inflater = layoutinflater.from(mainactivity.this); 
 } 
 public int getcount() { 
 mmaxposition = listurls.size()+1; 
 return mmaxposition; 
 } 
 public int getmaxposition(){ 
 return mmaxposition; 
 } 
 @override 
 public string getitem(int position) { 
 return listurls.get(position); 
 } 
 
 @override 
 public long getitemid(int position) { 
 return position; 
 } 
 
 @override 
 public view getview(int position, view convertview, viewgroup parent) { 
 viewholder holder = null; 
 if (convertview == null) { 
 holder = new viewholder(); 
 convertview = inflater.inflate(r.layout.item_image, parent,false); 
 holder.image = (imageview) convertview.findviewbyid(r.id.imageview); 
 convertview.settag(holder); 
 } else { 
 holder = (viewholder)convertview.gettag(); 
 } 
 log.d("", "position:"+position+" mmaxposition:"+mmaxposition); 
 //重点在这里，当position==mmaxposition-1让"+"选择图片的默认图片显示。 
 //当目前最多6中图片，则最大7时，图片影藏。 
 if (position==mmaxposition-1) { 
// holder.image.settag("default"); 
 holder.image.setimageresource(r.mipmap.ic_launcher); 
 holder.image.setvisibility(view.visible); 
 if(position==6&&mmaxposition==7){ 
  holder.image.setimageresource(r.mipmap.ic_launcher); 
  holder.image.setvisibility(view.gone); 
 } 
 } else { 
 final string path=listurls.get(position); 
 glide.with(mainactivity.this) 
  .load(new file(path)) 
  .placeholder(r.mipmap.default_error) 
  .error(r.mipmap.default_error) 
  .centercrop() 
  .crossfade() 
  .into(holder.image); 
 } 

三、gridview中item的点击事件

gridview.setonitemclicklistener(new adapterview.onitemclicklistener() { 
 @override 
 public void onitemclick(adapterview<?> parent, view view, int position, long id) { 
 
 
  if (position == gridadapter.getmaxposition() - 1) { 
  photopickerintent intent = new photopickerintent(mainactivity.this); 
  intent.setselectmodel(selectmodel.multi); 
  intent.setshowcarema(true); // 是否显示拍照 
  intent.setmaxtotal(6); // 最多选择照片数量，默认为9 
  intent.setselectedpaths(imagepaths); // 已选中的照片地址， 用于回显选中状态 
  startactivityforresult(intent, request_camera_code); 
  }else{ 
  photopreviewintent intent = new photopreviewintent(mainactivity.this); 
  intent.setcurrentitem(position); 
  intent.setphotopaths(imagepaths); 
  startactivityforresult(intent, request_preview_code); 
  } 
 } 
 }); 

整体源码：

package com.lidong.photopickersample; 
 
 
import android.content.intent; 
import android.os.bundle; 
import android.support.v7.app.appcompatactivity; 
import android.util.log; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.viewgroup; 
import android.widget.adapterview; 
import android.widget.baseadapter; 
import android.widget.button; 
import android.widget.edittext; 
import android.widget.gridview; 
import android.widget.imageview; 
import com.bumptech.glide.glide; 
import com.lidong.photopicker.imagecapturemanager; 
import com.lidong.photopicker.photopickeractivity; 
import com.lidong.photopicker.photopreviewactivity; 
import com.lidong.photopicker.selectmodel; 
import com.lidong.photopicker.intent.photopickerintent; 
import com.lidong.photopicker.intent.photopreviewintent; 
import org.json.jsonarray; 
import java.io.file; 
import java.util.arraylist; 
 
 
/** 
 * @ 
 * @author lidong 
 * @date 2016-02-29 
 */ 
public class mainactivity extends appcompatactivity { 
 
 
 private static final int request_camera_code = 10; 
 private static final int request_preview_code = 20; 
 private arraylist<string> imagepaths = new arraylist<>(); 
 private imagecapturemanager capturemanager; // 相机拍照处理类 
 private gridview gridview; 
 private int columnwidth; 
 private gridadapter gridadapter; 
 private button mbutton; 
 private string depp; 
 private edittext textview; 
 
 
 @override 
 protected void oncreate(bundle savedinstancestate) { 
 super.oncreate(savedinstancestate); 
 setcontentview(r.layout.activity_main); 
 gridview = (gridview) findviewbyid(r.id.gridview); 
 mbutton = (button) findviewbyid(r.id.button); 
 textview= (edittext)findviewbyid(r.id.et_context); 
 int cols = getresources().getdisplaymetrics().widthpixels / getresources().getdisplaymetrics().densitydpi; 
 cols = cols < 3 ? 3 : cols; 
 gridview.setnumcolumns(cols); 
 // preview 
 gridview.setonitemclicklistener(new adapterview.onitemclicklistener() { 
 @override 
 public void onitemclick(adapterview<?> parent, view view, int position, long id) { 
 
 
 if (position == gridadapter.getmaxposition() - 1) { 
 photopickerintent intent = new photopickerintent(mainactivity.this); 
 intent.setselectmodel(selectmodel.multi); 
 intent.setshowcarema(true); // 是否显示拍照 
 intent.setmaxtotal(6); // 最多选择照片数量，默认为9 
 intent.setselectedpaths(imagepaths); // 已选中的照片地址， 用于回显选中状态 
 startactivityforresult(intent, request_camera_code); 
 }else{ 
 photopreviewintent intent = new photopreviewintent(mainactivity.this); 
 intent.setcurrentitem(position); 
 intent.setphotopaths(imagepaths); 
 startactivityforresult(intent, request_preview_code); 
 } 
 } 
 }); 
 gridadapter = new gridadapter(imagepaths); 
 gridview.setadapter(gridadapter); 
 
 
 mbutton.setonclicklistener(new view.onclicklistener() { 
 @override 
 public void onclick(view v) { 
 depp =textview.gettext().tostring().trim()!=null?textview.gettext().tostring().trim():"woowoeo"; 
 new thread(){ 
 @override 
 public void run() { 
 super.run(); 
 fileuploadmanager.upload(imagepaths,depp); 
 } 
 }.start(); 
 } 
 }); 
 } 
 
 
 @override 
 protected void onactivityresult(int requestcode, int resultcode, intent data) { 
 super.onactivityresult(requestcode, resultcode, data); 
 if(resultcode == result_ok) { 
 switch (requestcode) { 
 // 选择照片 
 case request_camera_code: 
 loadadpater(data.getstringarraylistextra(photopickeractivity.extra_result)); 
 break; 
 // 预览 
 case request_preview_code: 
 loadadpater(data.getstringarraylistextra(photopreviewactivity.extra_result)); 
 break; 
 } 
 } 
 } 
 
 
 private void loadadpater(arraylist<string> paths){ 
 if(imagepaths == null){ 
 imagepaths = new arraylist<>(); 
 } 
 imagepaths.clear(); 
 imagepaths.addall(paths); 
 try{ 
 jsonarray obj = new jsonarray(imagepaths); 
 log.e("--", obj.tostring()); 
 }catch (exception e){ 
 e.printstacktrace(); 
 } 
 gridadapter.notifydatasetchanged(); 
 } 
 
 
 private class gridadapter extends baseadapter{ 
 private arraylist<string> listurls; 
 private int mmaxposition; 
 private layoutinflater inflater; 
 public gridadapter(arraylist<string> listurls) { 
 this.listurls = listurls; 
 inflater = layoutinflater.from(mainactivity.this); 
 } 
 
 
 public int getcount() { 
 if (listurls.size() == 9) { 
 mmaxposition = listurls.size()+1; 
 } else { 
 mmaxposition = listurls.size()+1; 
 } 
 return mmaxposition; 
 } 
 public int getmaxposition(){ 
 return mmaxposition; 
 } 
 @override 
 public string getitem(int position) { 
 return listurls.get(position); 
 } 
 
 
 @override 
 public long getitemid(int position) { 
 return position; 
 } 
 
 
 @override 
 public view getview(int position, view convertview, viewgroup parent) { 
 viewholder holder = null; 
 if (convertview == null) { 
 holder = new viewholder(); 
 
 
 convertview = inflater.inflate(r.layout.item_image, parent,false); 
 holder.image = (imageview) convertview.findviewbyid(r.id.imageview); 
 convertview.settag(holder); 
 } else { 
 holder = (viewholder)convertview.gettag(); 
 } 
 log.d("", "position:"+position+" mmaxposition:"+mmaxposition); 
 
 
 if (position==mmaxposition-1) { 
// holder.image.settag("default"); 
 holder.image.setimageresource(r.mipmap.ic_launcher); 
 holder.image.setvisibility(view.visible); 
 if(position==6&&mmaxposition==7){ 
 holder.image.setimageresource(r.mipmap.ic_launcher); 
 holder.image.setvisibility(view.gone); 
 } 
 } else { 
 final string path=listurls.get(position); 
 glide.with(mainactivity.this) 
 .load(new file(path)) 
 .placeholder(r.mipmap.default_error) 
 .error(r.mipmap.default_error) 
 .centercrop() 
 .crossfade() 
 .into(holder.image); 
 } 
 
 
 
 
 return convertview; 
 } 
 public class viewholder { 
 public imageview image; 
 } 
 } 
} 

上传的类：fileuploadmanager.java

package com.lidong.photopickersample; 
import android.util.log; 
import com.squareup.okhttp.mediatype; 
import com.squareup.okhttp.requestbody; 
import java.io.file; 
import java.util.arraylist; 
import retrofit.call; 
import retrofit.callback; 
import retrofit.gsonconverterfactory; 
import retrofit.response; 
import retrofit.retrofit; 
import retrofit.http.multipart; 
import retrofit.http.post; 
import retrofit.http.part; 
 
 
/** 
 * created by lidong on 2016/2/29 
 */ 
public class fileuploadmanager { 
 
 
 private static final string endpoint = "http://192.168.1.122:8080"; 
 
 
 public interface fileuploadservice { 
 /** 
 * 上传一张图片 
 * @param description 
 * @param imgs 
 * @return 
 */ 
 @multipart 
 @post("/upload") 
 call<string> uploadimage(@part("filename") string description, 
  @part("file\"; filename=\"image.png\"") requestbody imgs); 
 
 
 
 
 /** 
 * 上传6张图片 
 * @param description 
 * @param imgs1 
 * @param imgs2 
 * @param imgs3 
 * @param imgs4 
 * @param imgs5 
 * @param imgs6 
 * @return 
 */ 
 @multipart 
 @post("/upload") 
 call<string> uploadimage(@part("description") string description, 
  @part("file\"; filename=\"image.png\"") requestbody imgs1, 
  @part("file\"; filename=\"image.png\"") requestbody imgs2, 
  @part("file\"; filename=\"image.png\"") requestbody imgs3, 
  @part("file\"; filename=\"image.png\"") requestbody imgs4, 
  @part("file\"; filename=\"image.png\"") requestbody imgs5, 
  @part("file\"; filename=\"image.png\"") requestbody imgs6); 
 } 
 
 
 private static final retrofit sretrofit = new retrofit .builder() 
 .baseurl(endpoint) 
 .addconverterfactory(gsonconverterfactory.create()) 
// .addcalladapterfactory(rxjavacalladapterfactory.create()) // 使用rxjava作为回调适配器 
 .build(); 
 
 
 private static final fileuploadservice apimanager = sretrofit.create(fileuploadservice.class); 
 
 /** 
 * 发说说 
 * @param paths 
 * @param desp 
 */ 
 public static void upload(arraylist<string> paths,string desp){ 
 requestbody[] requestbody= new requestbody[6]; 
 if (paths.size()>0) { 
 for (int i=0;i<paths.size();i++) { 
 requestbody[i] = 
 requestbody.create(mediatype.parse("multipart/form-data"), new file(paths.get(i))); 
 } 
 } 
 call<string> call = apimanager.uploadimage( desp,requestbody[0],requestbody[1],requestbody[2],requestbody[3],requestbody[4],requestbody[5]); 
 call.enqueue(new callback<string>() { 
 @override 
 public void onresponse(response<string> response, retrofit retrofit) { 
 log.v("upload", response.message()); 
 log.v("upload", "success"); 
 } 
 
 
 @override 
 public void onfailure(throwable t) { 
 log.e("upload", t.tostring()); 
 } 
 }); 
 
 
 } 
} 

效果：

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本文已被整理到了《android微信开发教程汇总》，欢迎大家学习阅读。

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