Android GridView扩展仿微信微博发图动态添加删除图片功能

/**  * 可以动态设置最多上传几张，之后就不显示+号了，用户也无法上传了  * 默认9张  */ private int maxImages = 9; /**  * 获取最大上传张数  *  * @return  */ public int getMaxImages() {  return maxImages; } /**  * 设置最大上传张数  *  * @param maxImages  */ public void setMaxImages(int maxImages) {  this.maxImages = maxImages; }

/**  * 让GridView中的数据数目加1最后一个显示+号  * 当到达最大张数时不再显示+号  * @return 返回GridView中的数量  */ @Override public int getCount() {  int count = datas == null ? 1 : datas.size() + 1;  if (count >= maxImages) {   return datas.size();  } else {   return count;  } }

 @Override public View getView(final int position, View convertView, ViewGroup parent) {  ViewHolder viewHolder = null;  if (convertView == null) {   convertView = inflater.inflate(R.layout.item_published_grida, parent, false);   viewHolder = new ViewHolder(convertView);   convertView.setTag(viewHolder);  } else {   viewHolder = (ViewHolder) convertView.getTag();  }  /**代表+号之前的需要正常显示图片**/  if (datas != null && position < datas.size()) {   final File file = new File(datas.get(position).get("path").toString());   Glide.with(context)     .load(file)     .priority(Priority.HIGH)     .into(viewHolder.ivimage);   viewHolder.btdel.setVisibility(View.VISIBLE);   viewHolder.btdel.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {     if (file.exists()) {      file.delete();     }     datas.remove(position);     notifyDataSetChanged();    }   });  } else {   /**代表+号的需要+号图片显示图片**/   Glide.with(context)     .load(R.mipmap.image_add)     .priority(Priority.HIGH)     .centerCrop()     .into(viewHolder.ivimage);   viewHolder.ivimage.setScaleType(ImageView.ScaleType.FIT_XY);   viewHolder.btdel.setVisibility(View.GONE);  }  return convertView; }

package cn.bluemobi.dylan.gridviewaddimage;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import com.bumptech.glide.Glide;import com.bumptech.glide.Priority;import java.io.File;import java.util.ArrayList;import java.util.List;import java.util.Map;/** * com.bm.falvzixun.adapter.GridViewAddImgAdpter * * @author yuandl on 2015/12/24. *   添加上传图片适配器 */public class GridViewAddImgesAdpter extends BaseAdapter { private List<Map<String, Object>> datas; private Context context; private LayoutInflater inflater; /**  * 可以动态设置最多上传几张，之后就不显示+号了，用户也无法上传了  * 默认9张  */ private int maxImages = 9; public GridViewAddImgesAdpter(List<Map<String, Object>> datas, Context context) {  this.datas = datas;  this.context = context;  inflater = LayoutInflater.from(context); } /**  * 获取最大上传张数  *  * @return  */ public int getMaxImages() {  return maxImages; } /**  * 设置最大上传张数  *  * @param maxImages  */ public void setMaxImages(int maxImages) {  this.maxImages = maxImages; } /**  * 让GridView中的数据数目加1最后一个显示+号  * 当到达最大张数时不再显示+号  * @return 返回GridView中的数量  */ @Override public int getCount() {  int count = datas == null ? 1 : datas.size() + 1;  if (count >= maxImages) {   return datas.size();  } else {   return count;  } } @Override public Object getItem(int position) {  return null; } @Override public long getItemId(int position) {  return 0; } public void notifyDataSetChanged(List<Map<String, Object>> datas) {  this.datas = datas;  this.notifyDataSetChanged(); } @Override public View getView(final int position, View convertView, ViewGroup parent) {  ViewHolder viewHolder = null;  if (convertView == null) {   convertView = inflater.inflate(R.layout.item_published_grida, parent, false);   viewHolder = new ViewHolder(convertView);   convertView.setTag(viewHolder);  } else {   viewHolder = (ViewHolder) convertView.getTag();  }  /**代表+号之前的需要正常显示图片**/  if (datas != null && position < datas.size()) {   final File file = new File(datas.get(position).get("path").toString());   Glide.with(context)     .load(file)     .priority(Priority.HIGH)     .into(viewHolder.ivimage);   viewHolder.btdel.setVisibility(View.VISIBLE);   viewHolder.btdel.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {     if (file.exists()) {      file.delete();     }     datas.remove(position);     notifyDataSetChanged();    }   });  } else {   /**代表+号的需要+号图片显示图片**/   Glide.with(context)     .load(R.mipmap.image_add)     .priority(Priority.HIGH)     .centerCrop()     .into(viewHolder.ivimage);   viewHolder.ivimage.setScaleType(ImageView.ScaleType.FIT_XY);   viewHolder.btdel.setVisibility(View.GONE);  }  return convertView; } public class ViewHolder {  public final ImageView ivimage;  public final Button btdel;  public final View root;  public ViewHolder(View root) {   ivimage = (ImageView) root.findViewById(R.id.iv_image);   btdel = (Button) root.findViewById(R.id.bt_del);   this.root = root;  } }}

<?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:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#FFFFFF" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="cn.bluemobi.dylan.gridviewaddimage.MainActivity"> <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:text="说点什么"  android:textColor="#000000" /> <GridView  android:layout_marginTop="10dp"  android:id="@+id/gw"  android:numColumns="5"  android:horizontalSpacing="6dp"  android:columnWidth="60dp"  android:layout_width="match_parent"  android:layout_height="match_parent" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="66dp" android:layout_height="66dp"> <RelativeLayout  android:layout_width="match_parent"  android:layout_height="match_parent">  <ImageView   android:id="@+id/iv_image"   android:layout_width="match_parent"   android:gravity="center"   android:layout_height="match_parent"   android:scaleType="centerCrop"/>  <Button   android:id="@+id/bt_del"   android:layout_width="20dp"   android:layout_height="20dp"   android:layout_alignParentRight="true"   android:background="@drawable/bt_dynamic_del" /> </RelativeLayout></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="5.0dip" android:layout_marginRight="5.0dip" android:background="@android:color/transparent" android:orientation="vertical"> <LinearLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_margin="30px"  android:orientation="vertical">  <TextView   android:id="@+id/tv_camera"   android:layout_width="wrap_content"   android:layout_height="144px"   android:background="@mipmap/btn_top_arc"   android:gravity="center"   android:text="拍照"   android:textColor="#666666"   android:textSize="48px" />  <ImageView   android:layout_width="1022px"   android:layout_height="4px"   android:background="#666666" />  <TextView   android:id="@+id/tv_gallery"   android:layout_width="wrap_content"   android:layout_height="144px"   android:gravity="center"   android:background="@mipmap/btn_bottom_arc"   android:text="从手机相册选择"   android:textColor="#666666"   android:textSize="48px" /> </LinearLayout> <TextView  android:id="@+id/tv_cancel"  android:layout_width="wrap_content"  android:layout_height="144px"  android:layout_marginTop="20px"  android:layout_marginLeft="30px"  android:layout_marginRight="30px"  android:layout_gravity="center_horizontal"  android:background="@mipmap/btn_top_arc"  android:gravity="center"  android:text="取消"  android:textColor="#666666"  android:textSize="48px" /></LinearLayout>

package cn.bluemobi.dylan.gridviewaddimage;import android.app.Dialog;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.provider.MediaStore;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.Display;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager;import android.widget.AdapterView;import android.widget.GridView;import android.widget.TextView;import android.widget.Toast;import net.bither.util.NativeUtil;import java.io.File;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class MainActivity extends AppCompatActivity { private GridView gw; private List<Map<String, Object>> datas; private GridViewAddImgesAdpter gridViewAddImgesAdpter; private Dialog dialog; private final int PHOTO_REQUEST_CAREMA = 1;// 拍照 private final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择private static final String PHOTO_FILE_NAME = "temp_photo.jpg"; private File tempFile; private final String IMAGE_DIR = Environment.getExternalStorageDirectory() + "/gridview/"; /* 头像名称 */ private final String PHOTO_FILE_NAME = "temp_photo.jpg"; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  gw = (GridView) findViewById(R.id.gw);  datas = new ArrayList<>();  gridViewAddImgesAdpter = new GridViewAddImgesAdpter(datas, this);  gw.setAdapter(gridViewAddImgesAdpter);  gw.setOnItemClickListener(new AdapterView.OnItemClickListener() {   @Override   public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {    showdialog();   }  }); } /**  * 选择图片对话框  */ public void showdialog() {  View localView = LayoutInflater.from(this).inflate(    R.layout.dialog_add_picture, null);  TextView tv_camera = (TextView) localView.findViewById(R.id.tv_camera);  TextView tv_gallery = (TextView) localView.findViewById(R.id.tv_gallery);  TextView tv_cancel = (TextView) localView.findViewById(R.id.tv_cancel);  dialog = new Dialog(this, R.style.custom_dialog);  dialog.setContentView(localView);  dialog.getWindow().setGravity(Gravity.BOTTOM);  // 设置全屏  WindowManager windowManager = getWindowManager();  Display display = windowManager.getDefaultDisplay();  WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();  lp.width = display.getWidth(); // 设置宽度  dialog.getWindow().setAttributes(lp);  dialog.show();  tv_cancel.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View arg0) {    dialog.dismiss();   }  });  tv_camera.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {    dialog.dismiss();    // 拍照    camera();   }  });  tv_gallery.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {    dialog.dismiss();    // 从系统相册选取照片    gallery();   }  }); } /**  * 拍照  */ public void camera() {  // 判断存储卡是否可以用，可用进行存储  if (hasSdcard()) {   File dir = new File(IMAGE_DIR);   if (!dir.exists()) {    dir.mkdir();   }   tempFile = new File(dir,     System.currentTimeMillis() + "_" + PHOTO_FILE_NAME);   //从文件中创建uri   Uri uri = Uri.fromFile(tempFile);   Intent intent = new Intent();   intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);   intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);   intent.addCategory(intent.CATEGORY_DEFAULT);   // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CAREMA   startActivityForResult(intent, PHOTO_REQUEST_CAREMA);  } else {   Toast.makeText(this, "未找到存储卡，无法拍照！", Toast.LENGTH_SHORT).show();  } } /**  * 判断sdcard是否被挂载  */ public boolean hasSdcard() {  return Environment.getExternalStorageState().equals(    Environment.MEDIA_MOUNTED); } /**  * 从相册获取2  */ public void gallery() {  Intent intent = new Intent(    Intent.ACTION_PICK,    MediaStore.Images.Media.EXTERNAL_CONTENT_URI);  startActivityForResult(intent, PHOTO_REQUEST_GALLERY); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {  super.onActivityResult(requestCode, resultCode, data);  if (resultCode == RESULT_OK) {   if (requestCode == PHOTO_REQUEST_GALLERY) {    // 从相册返回的数据    if (data != null) {     // 得到图片的全路径     Uri uri = data.getData();     String[] proj = {MediaStore.Images.Media.DATA};     //好像是android多媒体数据库的封装接口，具体的看Android文档     Cursor cursor = managedQuery(uri, proj, null, null, null);     //按我个人理解 这个是获得用户选择的图片的索引值     int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);     //将光标移至开头 ，这个很重要，不小心很容易引起越界     cursor.moveToFirst();     //最后根据索引值获取图片路径     String path = cursor.getString(column_index);     uploadImage(path);    }   } else if (requestCode == PHOTO_REQUEST_CAREMA) {    if (resultCode != RESULT_CANCELED) {     // 从相机返回的数据     if (hasSdcard()) {      if (tempFile != null) {       uploadImage(tempFile.getPath());      } else {       Toast.makeText(this, "相机异常请稍后再试！", Toast.LENGTH_SHORT).show();      }      Log.i("images", "拿到照片path=" + tempFile.getPath());     } else {      Toast.makeText(this, "未找到存储卡，无法存储照片！", Toast.LENGTH_SHORT).show();     }    }   }  } } Handler handler = new Handler() {  @Override  public void handleMessage(Message msg) {   super.handleMessage(msg);   if (msg.what == 0xAAAAAAAA) {    photoPath(msg.obj.toString());   }  } }; /**  * 上传图片  *  * @param path  */ private void uploadImage(final String path) {  new Thread() {   @Override   public void run() {    if (new File(path).exists()) {     Log.d("images", "源文件存在" + path);    } else {     Log.d("images", "源文件不存在" + path);    }    File dir = new File(IMAGE_DIR);    if (!dir.exists()) {     dir.mkdir();    }    final File file = new File(dir + "/temp_photo" + System.currentTimeMillis() + ".jpg");    NativeUtil.compressBitmap(path, file.getAbsolutePath(), 50);    if (file.exists()) {     Log.d("images", "压缩后的文件存在" + file.getAbsolutePath());    } else {     Log.d("images", "压缩后的不存在" + file.getAbsolutePath());    }    Message message = new Message();    message.what = 0xAAAAAAAA;    message.obj = file.getAbsolutePath();    handler.sendMessage(message);   }  }.start(); } public void photoPath(String path) {  Map<String,Object> map=new HashMap<>();  map.put("path",path);  datas.add(map);  gridViewAddImgesAdpter.notifyDataSetChanged(); }}