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：
关于Android上传功能的更多内容请点击专题：Android上传操作汇总进行学习。
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。
以上就是本文的全部内容，希望对大家的学习有所帮助。