Android prevents bitmap memory overflow

How do you solve this problem when your Android development process often handles network images that send memory overflows?

Ideas:

Download to Local

Store directories on your phone via Web Capture and file download

Code:

Get Network public InputStream gethttpinfo (string urstring, string fun, String parm) throws Exception {HttpURLConnection Connec tion = (httpurlconnection) new URL (urstring). OpenConnection (); Connection.setrequestmethod (fun); Connection.setconnecttimeout (11000); Connection.setdoinput (true); Connection.setdooutput (true); Connection.setrequestproperty ("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q =0.8 "), Connection.setrequestproperty (" Connection "," keep-alive "); Connection.setrequestproperty (" User-agent "," mozilla/5.0 (Windows NT 6.1) applewebkit/537.36 (khtml, like Gecko) chrome/41.0.2272.101 safari/537.36 "); Connection.setrequestproperty ("accept-encoding", "gzip, deflate, sdch"); Connection.setrequestproperty (" Accept-language "," zh-cn,zh;q=0.8 "); OutputStream outputstream = Connection.getoutputstream (); OutputStream.write ( Parm.getbytes ()); if (connection.getresponsecode () = = HTTPURLCONNECTION.HTTP_OK) {return Connection.getinputstream () ;} return null;} File download public void DowNloadfiles (String FilePath, String Filename,inputstream inputstream) throws Exception {File File = new file (FilePath); if ( !file.exists ()) {file.mkdirs ();} FileOutputStream FileOutputStream = new FileOutputStream (new File (File,filename)); byte[] Arrs = new Byte[1024];int len = 0 ; while (len = Inputstream.read (arrs))! =-1) {fileoutputstream.write (arrs, 0, Len);} Fileoutputstream.close ();}

Then read from the local file into the bitmap object

Note: The image quality that needs to be read to modify can be obtained by modifying the aspect quality Bitmap object through the following two functions:

public static int calculateinsamplesize (bitmapfactory.options options,int reqwidth) {//the width of the source picture final int width = OPTIONS.O  Utwidth;int insamplesize = 1;if (Width > Reqwidth) {//calculates the ratio of the actual width to the target width final int widthRatio = Math.Round ((float) Width/ (float) reqwidth); insamplesize = WidthRatio;} return insamplesize;} public static Bitmap Decodesampledbitmapfromresource (String pathname,int reqwidth) {// The first resolution sets Injustdecodebounds to true to get the picture size final bitmapfactory.options Options = new Bitmapfactory.options (); O Ptions.injustdecodebounds = true; Bitmapfactory.decodefile (pathName, options);//Call the method defined above to calculate the Insamplesize value options.insamplesize = Calculateinsamplesize (options, reqwidth);//Use the obtained Insamplesize value to parse the picture again options.injustdecodebounds = False;return Bitmapfactory.decodefile (pathName, options);}

At this time bitmap quality has changed!

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Android prevents bitmap memory overflow