Android实现QQ图片说说照片选择效果

本文实例为大家分享了android实现qq图片说说照片选择的具体代码，供大家参考，具体内容如下

效果展示

布局文件

布局是很简单的，一个gridview，直接上布局：

layout/activity_add_photo.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp"
  android:background="#00bb9c">

  <textview
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerinparent="true"
   android:text="写动态"
   android:textappearance="?android:attr/textappearancelarge"
   android:textcolor="@android:color/white" />

  <textview
   android:id="@+id/send"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignparentright="true"
   android:layout_centervertical="true"
   android:layout_marginright="10dp"
   android:text="发送"
   android:textappearance="?android:attr/textappearancelarge"
   android:textcolor="@android:color/white" />

 </relativelayout>

 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:layout_margin="16dp"
  android:orientation="vertical">

  <edittext
   android:layout_width="match_parent"
   android:layout_height="100dp"
   android:enabled="false"
   android:focusable="false"
   android:gravity="top"
   android:hint="分享您的那点新鲜事儿..."
   android:maxlines="5" />

  <linearlayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="5dp">

   <gridview
    android:id="@+id/gridview"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:numcolumns="4" />

  </linearlayout>  

 </linearlayout>

</linearlayout>

layout/activity_add_photo_gv_items.xml 使用了自定义的view使得布局为正方形

<?xml version="1.0" encoding="utf-8"?>
<com.shenhua.tabhostdemo.selectimg.squarerelativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">

 <imageview
  android:id="@+id/main_gridview_item_photo"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:layout_centerinparent="true"
  android:contentdescription="@null"
  android:padding="5dp"
  android:scaletype="fitxy" />

 <checkbox
  android:id="@+id/main_gridview_item_cb"
  android:layout_width="20dp"
  android:layout_height="20dp"
  android:layout_alignparentend="true"
  android:layout_alignparentright="true"
  android:layout_alignparenttop="true"
  android:layout_margin="2dp"
  android:background="@drawable/ic_delete"
  android:backgroundtint="#00bb9c"
  android:button="@null" />

</com.shenhua.tabhostdemo.selectimg.squarerelativelayout>

代码实现

squarerelativelayout.java：

package com.shenhua.tabhostdemo.selectimg;

import android.content.context;
import android.util.attributeset;
import android.widget.relativelayout;

/**
 * 自定义方形布局
 * created by shenhua on 4/25/2016.
 */
public class squarerelativelayout extends relativelayout {
 public squarerelativelayout(context context, attributeset attrs, int defstyle) {
  super(context, attrs, defstyle);
 }

 public squarerelativelayout(context context, attributeset attrs) {
  super(context, attrs);
 }

 public squarerelativelayout(context context) {
  super(context);
 }

 @override
 protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
  setmeasureddimension(getdefaultsize(0, widthmeasurespec), getdefaultsize(0, heightmeasurespec));
  int childwidthsize = getmeasuredwidth();
  widthmeasurespec = measurespec.makemeasurespec(childwidthsize, measurespec.exactly);
  heightmeasurespec = widthmeasurespec;
  super.onmeasure(widthmeasurespec, heightmeasurespec);
 }
}

uploadphotoactivity.java： 主activity

package com.shenhua.tabhostdemo.selectimg;

import android.content.intent;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.net.uri;
import android.os.bundle;
import android.support.annotation.nullable;
import android.support.v7.app.appcompatactivity;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.adapterview;
import android.widget.baseadapter;
import android.widget.checkbox;
import android.widget.gridview;
import android.widget.imageview;
import android.widget.textview;
import android.widget.toast;

import com.shenhua.tabhostdemo.r;

import java.io.bytearrayoutputstream;
import java.util.arraylist;
import java.util.list;

/**
 * created by shenhua on 4/25/2016.
 */
public class uploadphotoactivity extends appcompatactivity {

 private static final int img_count = 8;
 private static final string img_add_tag = "a";
 private gridview gridview;
 private gvadapter adapter;
 private textview textview;
 private imageview img;
 private list<string> list;

 @override
 protected void oncreate(@nullable bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_add_photo);
  gridview = (gridview) findviewbyid(r.id.gridview);
  textview = (textview) findviewbyid(r.id.send);
  textview.setonclicklistener(new view.onclicklistener() {
   @override
   public void onclick(view v) {
    system.out.println("发送：" + integer.tostring(list.size() - 1));
    upload();
   }
  });
  initdata();
 }

 private void upload() {
  bitmap bitmap;
  bitmap bmpcompressed;
  for (int i = 0; i < list.size() - 1; i++) {
   bitmap = bitmapfactory.decodefile(list.get(i));
   bmpcompressed = bitmap.createscaledbitmap(bitmap, 640, 480, true);
   bytearrayoutputstream bos = new bytearrayoutputstream();
   bmpcompressed.compress(bitmap.compressformat.jpeg, 100, bos);
   byte[] data = bos.tobytearray();
   system.out.println(data);
  }

 }

 private void initdata() {
  if (list == null) {
   list = new arraylist<>();
   list.add(img_add_tag);
  }
  adapter = new gvadapter();
  gridview.setadapter(adapter);
  gridview.setonitemclicklistener(new adapterview.onitemclicklistener() {

   @override
   public void onitemclick(adapterview<?> parent, view view, int position, long id) {
    if (list.get(position).equals(img_add_tag)) {
     if (list.size() < img_count) {
      intent i = new intent(intent.action_pick, android.provider.mediastore.images.media.external_content_uri);
      startactivityforresult(i, 0);
     } else
      toast.maketext(uploadphotoactivity.this, "最多只能选择7张照片！", toast.length_short).show();
    }
   }
  });
  refreshadapter();
 }

 private void refreshadapter() {
  if (list == null) {
   list = new arraylist<>();
  }
  if (adapter == null) {
   adapter = new gvadapter();
  }
  adapter.notifydatasetchanged();
 }

 private class gvadapter extends baseadapter {

  @override
  public int getcount() {
   return list.size();
  }

  @override
  public object getitem(int position) {
   return null;
  }

  @override
  public long getitemid(int position) {
   return 0;
  }

  @override
  public view getview(final int position, view convertview, viewgroup parent) {
   final viewholder holder;
   if (convertview == null) {
    convertview = layoutinflater.from(getapplication()).inflate(r.layout.activity_add_photo_gv_items, parent, false);
    holder = new viewholder();
    holder.imageview = (imageview) convertview.findviewbyid(r.id.main_gridview_item_photo);
    holder.checkbox = (checkbox) convertview.findviewbyid(r.id.main_gridview_item_cb);
    convertview.settag(holder);
   } else {
    holder = (viewholder) convertview.gettag();
   }
   string s = list.get(position);
   if (!s.equals(img_add_tag)) {
    holder.checkbox.setvisibility(view.visible);
    holder.imageview.setimagebitmap(imagetool.createimagethumbnail(s));
   } else {
    holder.checkbox.setvisibility(view.gone);
    holder.imageview.setimageresource(r.mipmap.ic_photo_upload);
   }
   holder.checkbox.setonclicklistener(new view.onclicklistener() {
    @override
    public void onclick(view v) {
     list.remove(position);
     refreshadapter();
    }
   });
   return convertview;
  }

  private class viewholder {
   imageview imageview;
   checkbox checkbox;
  }

 }

 @override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  super.onactivityresult(requestcode, resultcode, data);
  if (data == null) {
   system.out.println("data null");
   return;
  }
  if (requestcode == 0) {
   final uri uri = data.getdata();
   string path = imagetool.getimageabsolutepath(this, uri);
   system.out.println(path);
   if (list.size() == img_count) {
    removeitem();
    refreshadapter();
    return;
   }
   removeitem();
   list.add(path);
   list.add(img_add_tag);
   refreshadapter();
  }
 }

 private void removeitem() {
  if (list.size() != img_count) {
   if (list.size() != 0) {
    list.remove(list.size() - 1);
   }
  }
 }

}

imagetool.java： 图片工具类

package com.shenhua.tabhostdemo.selectimg;

import android.annotation.targetapi;
import android.app.activity;
import android.content.contenturis;
import android.content.context;
import android.database.cursor;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.net.uri;
import android.os.environment;
import android.provider.documentscontract;
import android.provider.mediastore;

/**
 * created by shenhua on 4/26/2016.
 */
public class imagetool {

 /**
  * 获取图片的绝对路径，需要添加用户权限
  */
 @targetapi(19)
 public static string getimageabsolutepath(activity context, uri imageuri) {
  if (context == null || imageuri == null)
   return null;
  if (android.os.build.version.sdk_int >= android.os.build.version_codes.kitkat && documentscontract.isdocumenturi(context, imageuri)) {
   if (isexternalstoragedocument(imageuri)) {
    string docid = documentscontract.getdocumentid(imageuri);
    string[] split = docid.split(":");
    string type = split[0];
    if ("primary".equalsignorecase(type)) {
     return environment.getexternalstoragedirectory() + "/" + split[1];
    }
   } else if (isdownloadsdocument(imageuri)) {
    string id = documentscontract.getdocumentid(imageuri);
    uri contenturi = contenturis.withappendedid(uri.parse("content://downloads/public_downloads"), long.valueof(id));
    return getdatacolumn(context, contenturi, null, null);
   } else if (ismediadocument(imageuri)) {
    string docid = documentscontract.getdocumentid(imageuri);
    string[] split = docid.split(":");
    string type = split[0];
    uri contenturi = null;
    if ("image".equals(type)) {
     contenturi = mediastore.images.media.external_content_uri;
    } else if ("video".equals(type)) {
     contenturi = null;//不获取视频
    } else if ("audio".equals(type)) {
     contenturi = null;//不获取音频
    }
    string selection = mediastore.images.media._id + "=?";
    string[] selectionargs = new string[]{split[1]};
    return getdatacolumn(context, contenturi, selection, selectionargs);
   }
  } // mediastore (and general)
  else if ("content".equalsignorecase(imageuri.getscheme())) {
   if (isgooglephotosuri(imageuri))
    return imageuri.getlastpathsegment();
   return getdatacolumn(context, imageuri, null, null);
  }
  // file
  else if ("file".equalsignorecase(imageuri.getscheme())) {
   return imageuri.getpath();
  }
  return null;
 }

 public static string getdatacolumn(context context, uri uri, string selection, string[] selectionargs) {
  cursor cursor = null;
  string column = mediastore.images.media.data;
  string[] projection = {column};
  try {
   cursor = context.getcontentresolver().query(uri, projection, selection, selectionargs, null);
   if (cursor != null && cursor.movetofirst()) {
    int index = cursor.getcolumnindexorthrow(column);
    return cursor.getstring(index);
   }
  } finally {
   if (cursor != null)
    cursor.close();
  }
  return null;
 }

 /**
  * @param uri the uri to check.
  * @return whether the uri authority is externalstorageprovider.
  */
 public static boolean isexternalstoragedocument(uri uri) {
  return "com.android.externalstorage.documents".equals(uri.getauthority());
 }

 /**
  * @param uri the uri to check.
  * @return whether the uri authority is downloadsprovider.
  */
 public static boolean isdownloadsdocument(uri uri) {
  return "com.android.providers.downloads.documents".equals(uri.getauthority());
 }

 /**
  * @param uri the uri to check.
  * @return whether the uri authority is mediaprovider.
  */
 public static boolean ismediadocument(uri uri) {
  return "com.android.providers.media.documents".equals(uri.getauthority());
 }

 /**
  * @param uri the uri to check.
  * @return whether the uri authority is google photos.
  */
 public static boolean isgooglephotosuri(uri uri) {
  return "com.google.android.apps.photos.content".equals(uri.getauthority());
 }

 /**
  * 创建图片缩略图
  *
  * @param filepath
  * @return
  */
 public static bitmap createimagethumbnail(string filepath) {
  bitmap bitmap = null;
  bitmapfactory.options opts = new bitmapfactory.options();
  opts.injustdecodebounds = true;
  bitmapfactory.decodefile(filepath, opts);
  opts.insamplesize = computesamplesize(opts, -1, 128 * 128);
  opts.injustdecodebounds = false;
  try {
   bitmap = bitmapfactory.decodefile(filepath, opts);
  } catch (exception e) {
   // todo: handle exception
  }
  return bitmap;
 }

 public static int computesamplesize(bitmapfactory.options options, int minsidelength, int maxnumofpixels) {
  int initialsize = computeinitialsamplesize(options, minsidelength, maxnumofpixels);
  int roundedsize;
  if (initialsize <= 8) {
   roundedsize = 1;
   while (roundedsize < initialsize) {
    roundedsize <<= 1;
   }
  } else {
   roundedsize = (initialsize + 7) / 8 * 8;
  }
  return roundedsize;
 }

 private static int computeinitialsamplesize(bitmapfactory.options options, int minsidelength, int maxnumofpixels) {
  double w = options.outwidth;
  double h = options.outheight;
  int lowerbound = (maxnumofpixels == -1) ? 1 : (int) math.ceil(math.sqrt(w * h / maxnumofpixels));
  int upperbound = (minsidelength == -1) ? 128 : (int) math.min(math.floor(w / minsidelength), math.floor(h / minsidelength));
  if (upperbound < lowerbound) {
   // return the larger one when there is no overlapping zone.
   return lowerbound;
  }
  if ((maxnumofpixels == -1) && (minsidelength == -1)) {
   return 1;
  } else if (minsidelength == -1) {
   return lowerbound;
  } else {
   return upperbound;
  }
 }
}

因为 android4.4以上版本获得的图片uri是com.xxxxx的，因此需要在工具类里做判断，否则得不到图片的绝对地址。

工具类参考了别人的一篇博客，忘了留博客地址了，请原博主谅解。

最后需要加上一个权限：

<uses-permission android:name="android.permission.read_external_storage" />

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。