Android dynamic Add picture line wrap

<strong> near the project to use to dynamically add pictures, and then line-wrapping implementation. Just started to use the GridView, but useless, what reason to forget. Let me take a look at my implementation. </strong>

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Look at the code 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:o rientation= "vertical" >    <button        android:id= "@+id/button1"        android:layout_width= "Wrap_content"        android:layout_height= "wrap_content"        android:text= "@string/sel_pic_6"/>    <linearlayout        Android:id= "@+id/linearlayout"        android:layout_width= "match_parent"        android:layout_height= "Wrap_ Content "        android:orientation=" vertical ">    </LinearLayout></LinearLayout>

Activity:

Package Org.cn.ruimit.pic;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.util.arraylist;import Org.cn.ruimit.r;import Android.content.intent;import Android.database.Cursor;import Android.graphics.bitmapfactory;import Android.net.uri;import Android.os.bundle;import Android.provider.MediaStore ; Import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.imageview;import Android.widget.imageview.scaletype;import Android.widget.linearlayout;import Android.widget.linearlayout.layoutparams;import Com.china.hunbohui.baseactivity;import com.china.hunbohui.iapplication;/** * @author wangjing */public class Addpicaty extends Baseactivity {private static FINA l int sel_pic = 1;private LinearLayout linearlayout = null;private arraylist<imagebean> imageBeans;@ overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview ( R.layout.add_pic_lay); Initview ();} private void Initview () {Imagebeans = new arraylist<addpicaty.imagebean> (); linearlayout = (linearlayout) Findviewbyid (r.id.linearlayout); Findviewbyid (R.id.button1). Setonclicklistener (New Onclicklistener () {@Overridepublic void OnClick (View v) {// Local album selection Intent intent = new Intent (intent.action_get_content); "Android.intent.action.GET_CONTENT"//Intent.addcategory (intent.category_openable); Intent.settype ("image/*"); Startactivityforresult (Intent, sel_pic);});} @Overrideprotected void Onactivityresult (int requestcode, int resultcode, Intent data) {Super.onactivityresult ( Requestcode, ResultCode, data); if (ResultCode = = RESULT_OK) {if (Requestcode = = sel_pic) {uri uri = Data.getdata (); String[] proj = {MediaStore.Images.Media.DATA}; cursor cursor = managedquery (URI, proj, NULL, NULL, NULL);//According to my own understanding this is the index value of the picture that gets the user's choice int column_index = Cursor.getcolumnind Exorthrow (MediaStore.Images.Media.DATA);//move the cursor to the beginning, this is very important, it is easy to cause the cross-border Cursor.movetofirst ();//finally get the picture path based on the index value string Path = cursor.getstring (column_index); Imagebean bean = New Imagebean (); Bean.setpath (path); Imagebeans.add (bean); UpdateLayout ();}}}  /** * Update picture layout */private void UpdateLayout () {LinearLayout ll_horizontal = Null;linearlayout.removeallviews (); for (int i = 0; I < imagebeans.size (); i++) {if (i%4 = = 0) {ll_horizontal = new LinearLayout (context); ll_horizontal.setorientation (linearlayout.horizontal); Linearlayout.addview (ll_horizontal);} ImageView img = new ImageView (context); Setimglayoutparams (IMG); Setimagebitmap (IMG, Imagebeans.get (i). GetPath ()); Ll_ Horizontal.addview (IMG);}} /** * Set ImageView size */private void Setimglayoutparams (ImageView img) {//Layoutparams LP = (layoutparams) img.getlayoutpa Rams (); Layoutparams LP = new Layoutparams (0, 0); lp.width = (int) ((iapplication.with-20 * iapplication.dencity-3 * 5 * iappli cation.dencity)/4); lp.height = Lp.width;lp.rightmargin = (int) (5 * iapplication.dencity); lp.bottommargin = (int) (5 * I application.dencity); img.setlayoutparams (LP); Img.setscaletype (Scaletype.center_crop);} /** * Set picture for ImageView */private void Setimagebitmap (ImageView img,string url) {try {FileInputStream FIS = new FileInputStream (URL);     Img.setimagebitmap (Bitmapfactory.decodestream (FIS));     } catch (FileNotFoundException e) {e.printstacktrace (); }}/** * Picture Object */class Imagebean {private string Path;public string GetPath () {return path;} public void SetPath (String path) {this.path = path;}}}

Main learning points: the size of the picture set, the layout of the two pieces of the update.

Android dynamic Add picture line wrap