Android 多图上传后将图片进行九宫格展示的实例代码
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2022-09-05 15:10:17
不多说上代码public abstract class ninegridadapter { protected context context; protected list list; pub...
不多说上代码
public abstract class ninegridadapter { protected context context; protected list list; public ninegridadapter(context context, list list) { this.context = context; this.list = list; } public abstract int getcount(); public abstract string geturl(int positopn); public abstract object getitem(int position); public abstract long getitemid(int position); public abstract view getview(int i, view view); }
package com.wd.weidologin.pic; import android.content.context; import android.util.attributeset; import android.util.displaymetrics; import android.view.view; import android.view.viewgroup; import android.widget.imageview; public class ninegridlayout extends viewgroup { private ninegridadapter adapter; private onitemclicklisterner onitemclicklisterner; // 行间距 private int linespace; //列间距 private int gap; private final int default_width = 140; private int columns;// private int rows;// private int totalwidth; private context context; int singlewidth = 0, singleheight = 0; private int defaultwidth, defaultheight; private int oldcount; public ninegridlayout(context context) { this(context, null); } public ninegridlayout(context context, attributeset attrs) { this(context, attrs, 0); } public ninegridlayout(context context, attributeset attrs, int defstyleattr) { super(context, attrs, defstyleattr); this.context = context; gap = dip2px(context, 10); linespace = dip2px(context,10); viewgroup.layoutparams lp = new viewgroup.layoutparams(viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content); defaultwidth = defaultheight = dip2px(context, default_width); } public void setdefaultwidth(int defaultwidth) { this.defaultwidth = defaultwidth; } public void setdefaultheight(int defaultheight) { this.defaultheight = defaultheight; } public void setadapter(ninegridadapter adapter) { this.adapter = adapter; if (adapter == null) { return; } //初始化布局形状 generatechildrenlayout(adapter.getcount()); //这里做一个重用view的处理 // if (oldcount == 0) { removeallviews(); for (int i = 0; i < adapter.getcount(); i++) { view itemview = adapter.getview(i, null); addview(itemview, generatedefaultlayoutparams()); } // } /*else { //以前添加过view int newviewcount = adapter.getcount(); if (oldcount > newviewcount) { removeviews(newviewcount - 1, oldcount - newviewcount); for (int i = 0; i < newviewcount - 1; i++) { adapter.getview(i, getchildat(i)); } } else if (oldcount < newviewcount) { for (int i = 0; i < newviewcount - oldcount; i++) { view itemview = adapter.getview(i, null); addview(itemview, generatedefaultlayoutparams()); } } }*/ oldcount = adapter.getcount(); requestlayout(); } @override protected void onmeasure(int widthmeasurespec, int heightmeasurespec) { super.onmeasure(widthmeasurespec, heightmeasurespec); int widthmode = measurespec.getmode(widthmeasurespec); int heightmode = measurespec.getmode(heightmeasurespec); int sizewidth = measurespec.getsize(widthmeasurespec); int sizeheight = measurespec.getsize(heightmeasurespec); totalwidth = sizewidth - getpaddingleft() - getpaddingright(); if (adapter != null && adapter.getcount() > 0) { int measurewidth, measureheight; int childrencount = adapter.getcount(); if (childrencount == 1) { singlewidth = defaultwidth; singleheight = defaultheight; } else { singlewidth = (totalwidth - gap * (3 - 1)) / 3; singleheight = singlewidth; } measurechildren(measurespec.makemeasurespec(singlewidth, measurespec.exactly), measurespec.makemeasurespec(singleheight, measurespec.exactly)); measurewidth = singlewidth * columns + gap * (columns - 1); measureheight = singleheight * rows + linespace * (rows - 1); setmeasureddimension(sizewidth, measureheight); } } @override protected void onlayout(boolean changed, int l, int t, int r, int b) { layoutchildrenview(); } private void layoutchildrenview() { if (adapter == null || adapter.getcount() == 0) { return; } int childrencount = adapter.getcount(); for (int i = 0; i < childrencount; i++) { int[] position = findposition(i); int left = (singlewidth + gap) * position[1] + getpaddingleft(); int top = (singleheight + linespace) * position[0] + getpaddingtop(); int right = left + singlewidth; int bottom = top + singleheight; imageview childrenview = (imageview) getchildat(i); if (childrencount == 1) { //只有一张图片 childrenview.setscaletype(imageview.scaletype.fit_center); } else { childrenview.setscaletype(imageview.scaletype.center_crop); } final int itemposition = i; childrenview.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { if (onitemclicklisterner != null) { onitemclicklisterner.onitemclick(v, itemposition); } } }); childrenview.layout(left, top, right, bottom); } } private int[] findposition(int childnum) { int[] position = new int[2]; for (int i = 0; i < rows; i++) { for (int j = 0; j < columns; j++) { if ((i * columns + j) == childnum) { position[0] = i;//行 position[1] = j;//列 break; } } } return position; } public int getgap() { return gap; } public void setgap(int gap) { this.gap = gap; } /** * 根据图片个数确定行列数量 * 对应关系如下 * num row column * 1 1 1 * 2 1 2 * 3 1 3 * 4 2 2 * 5 2 3 * 6 2 3 * 7 3 3 * 8 3 3 * 9 3 3 * * @param length */ private void generatechildrenlayout(int length) { if (length <= 3) { rows = 1; columns = length; } else if (length <= 6) { rows = 2; columns = 3; if (length == 4) { columns = 2; } } else { rows = 3; columns = 3; } } /** * dp to px */ public static int dip2px(context context, double dpvalue) { final float scale = context.getresources().getdisplaymetrics().density; return (int) (dpvalue * scale + 0.5f); } public void setonitemclicklisterner(onitemclicklisterner onitemclicklisterner) { this.onitemclicklisterner = onitemclicklisterner; } public interface onitemclicklisterner { public void onitemclick(view view, int position); } }
package com.wd.weidologin.home; import androidx.appcompat.app.appcompatactivity; import androidx.recyclerview.widget.gridlayoutmanager; import androidx.recyclerview.widget.recyclerview; import android.content.broadcastreceiver; import android.content.context; import android.content.intent; import android.content.intentfilter; import android.content.sharedpreferences; import android.graphics.color; import android.os.bundle; import android.util.log; import android.view.view; import android.view.viewgroup; import android.widget.imageview; import android.widget.toast; import com.bumptech.glide.glide; import com.google.gson.gson; import com.wd.weidologin.r; import com.wd.weidologin.adapter.attentionrequestadapter; import com.wd.weidologin.okutil.okre; import com.wd.weidologin.pic.ninegridadapter; import com.wd.weidologin.pic.ninegridlayout; import java.util.arraylist; import java.util.hashmap; import java.util.list; public class mainactivity2 extends appcompatactivity { private recyclerview ry; private attentionrequestadapter attentionrequestadapter; private arraylist<circlebean.resultentity> lists=new arraylist<>(); private ninegridlayout mgv; private circlebean.resultentity result; private string picture; private list<string> list = new arraylist<string>(); private adapter adapter; public static final string action ="com.example.casts"; private string msg; private sharedpreferences canfig; private sharedpreferences.editor edited; private string imageurl = "http://pic1.nipic.com/2008-09-08/200898163242920_2.jpg";//如果没有接口可以用这个简单代替这个就不需要进行切割了 @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main2); init();//(有接口的情况) list.add(imageurl);//没有接口的情况 ---==================== if (adapter == null){ adapter = new adapter(this,list); mgv.setadapter(adapter); } mgv.setonitemclicklisterner(new ninegridlayout.onitemclicklisterner() { @override public void onitemclick(view view, int position) { toast.maketext(getapplicationcontext(), string.valueof(position),toast.length_long).show(); } });//没有接口的情况 ---====================不要混 } private void init() { // int sickcircleid = getintent().getintextra("sickcircleid", 0); canfig = getsharedpreferences("canfig", context.mode_private); edited = canfig.edit(); int resultkey = canfig.getint("resultkey", 0); string url="http:....."+resultkey; hashmap<string, string> headmap = new hashmap<>(); headmap.put("userid","287"); headmap.put("sessionid","1604985492394287"); okre.getinstance().getcircledetails(url,headmap, new okre.netcallback() { @override public void onsuccess(string string) { circlebean circlebean = new gson().fromjson(string, circlebean.class); picture = circlebean.getresult().getpicture(); toast.maketext(mainactivity2.this, picture+"", toast.length_short).show(); mgv = findviewbyid(r.id.d); string[] split = picture.split(",");//一般多图上传后需要将图片进行切割 if (picture.equals("")){//在这里我进行了是否有图片的判断以免没有图片还进行占位 mgv.setvisibility(view.gone); } for (int i = 0; i < split.length; i++) { list.add(split[i]); } if (adapter == null){ adapter = new adapter(mainactivity2.this,list); mgv.setadapter(adapter); } mgv.setonitemclicklisterner(new ninegridlayout.onitemclicklisterner() {图片点击事件 @override public void onitemclick(view view, int position) { toast.maketext(getapplicationcontext(), string.valueof(position),toast.length_long).show(); } }); } @override public void onfail(string string) { // toast.maketext(mainactivity.this, string+"", toast.length_short).show(); } }); } private class adapter extends ninegridadapter {//适配器 public adapter(context context, list list){ super(context,list); } @override public int getcount() { return list == null?0:list.size(); } @override public string geturl(int positon) { return getitem(positon) == null ? null : getitem(positon).tostring(); } @override public object getitem(int position) { return (list == null) ? null : list.get(position); } @override public long getitemid(int position) { return position; } @override public view getview(int i, view view) { imageview imageview = new imageview(getapplicationcontext()); viewgroup.layoutparams lp = new viewgroup.layoutparams(viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content); imageview.setscaletype(imageview.scaletype.center_crop); imageview.setbackgroundcolor(color.parsecolor("#f5f5f5")); imageview.setlayoutparams(lp); glide.with(context).load(geturl(i)).into(imageview); return imageview; } } }
最后因为这个包含网络请求所以需要进行设置
在res下创建xml文件夹创建network_security_config.xml
<?xml version="1.0" encoding="utf-8"?> <network-security-config> <base-config cleartexttrafficpermitted="true" /> </network-security-config>
放到
并且添加网络权限
<uses-permission android:name="android.permission.internet" />
网路请求请看以往博客 多图上传请看以往博客或者我上传的代码,后续我会将全部整合上传demo
感谢观看
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