Android Cleanup Device Memory detailed complete example (b)

Mainactivity as follows:

Package Cc.c;import Java.io.bufferedreader;import Java.io.filereader;import java.io.ioexception;import Java.util.list;import Android.app.activity;import Android.app.activitymanager;import Android.app.activitymanager.memoryinfo;import Android.app.activitymanager.runningappprocessinfo;import Android.content.context;import Android.os.bundle;import Android.view.view;import Android.widget.Button;import android.widget.textview;/** * Demo Description: * Clean phone memory * * Reference: * 1 http://blog.30c.org/1816.html * 2 Http://www.cnblogs.com/hel loandroid/archive/2011/10/14/2212334.html * Thank you very much * * Note permissions: * <uses-permission android:name= "ANDROID.P Ermission. Kill_background_processes "/> * */public class Mainactivity extends Activity {private TextView mtotalmemorytextview;p Rivate TextView mavailmemorytextview;private Button mcleanbutton;private TextView mcleaninfotextview;private Activitymanager mactivitymanager;private stringbuffer mcleaninfostringbuffer;private long AvailMemory;private longTotalmemory;private list<runningappprocessinfo> mrunningappprocessinfolist; @Overrideprotected void OnCreate ( Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.main); init ();} private void Init () {mcleaninfostringbuffer = new StringBuffer (); mactivitymanager= (Activitymanager) Getsystemservice ( Context.activity_service); Mtotalmemorytextview = (TextView) Findviewbyid (R.id.totalmemorytextview); Mavailmemorytextview = (TextView) Findviewbyid (r.id.availmemorytextview); Mcleaninfotextview = (TextView) Findviewbyid (r.id.cleaninfotextview); Mcleanbutton = (Button) Findviewbyid (R.id.cleanbutton); totalmemory = Gettotalmemory (); availmemory = Getavailmemory (); Mtotalmemorytextview.settext (totalmemory + "MB"); Mavailmemorytextview.settext (availmemory + "MB"), Mcleanbutton.setonclicklistener (new View.onclicklistener () {@ overridepublic void OnClick (View v) {runningappprocessinfo runningappprocessinfo=null;mrunningappprocessinfolist= Mactivitymanager.getrunningappprocessES ();//list<activitymanager.runningserviceinfo> Serviceinfos = mactivitymanager.getrunningservices (+); Mrunningappprocessinfolist! = null) {for (int i = 0; i < mrunningappprocessinfolist.size (); ++i) {Runningappprocessinfo = Mrunningappprocessinfolist.get (i);//a process with a general value greater than runningappprocessinfo.importance_service//is an unused process for a long time or an empty process/ A process with a general value greater than runningappprocessinfo.importance_visible//is a non-visible process that runs if in the background (Runningappprocessinfo.importance > runningappprocessinfo.importance_visible) {string[] pkgList = runningappprocessinfo.pkglist;for (int j = 0; J < PkgLis T.length; ++J) {mactivitymanager.killbackgroundprocesses (pkglist[j]); Mcleaninfostringbuffer.append (PkgList[j] + "is killed                ... \ n "); Mcleaninfotextview.settext (mcleaninfostringbuffer.tostring ());}}} Get the remaining memory again to calculate the scavenging value mcleaninfostringbuffer.append ("Total cleanup:" + (Getavailmemory ()-availmemory) + "MB"); Mcleaninfotextview.settext (Mcleaninfostringbuffer.tostring ()); Mavailmemorytextview.settext (getAvailMemory () + " MB ");}});} Private Long Gettotalmemory () {//System memory information file string FilePath = "/proc/meminfo"; String lineString; string[] Stringarray;long totalmemory = 0;try {FileReader FileReader = new FileReader (FilePath); BufferedReader BufferedReader = new BufferedReader (filereader,1024 * 8);//Read Meminfo first line, get total system memory size linestring = Bufferedreader.readline ();//Split Stringarray = Linestring.split ("\\s+") by space;//Get Total system memory, Unit Kbtotalmemory = Integer.valueof (Stringarray[1]). Intvalue (); Bufferedreader.close (); SYSTEM.OUT.PRINTLN ("------> linestring=" + linestring+ ", stringarray[0]=" + stringarray[0] + ", stringarray[1 ]= "+ stringarray[1] +", stringarray[2]= "+ stringarray[2]);} catch (IOException e) {}return totalmemory/1024;} Private Long Getavailmemory () {memoryinfo memoryinfo = new Memoryinfo (); Mactivitymanager.getmemoryinfo (memoryinfo); Return MEMORYINFO.AVAILMEM/(1024 * 1024);}}

Main.xml as follows:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent "Android:paddi ngbottom= "@dimen/activity_vertical_margin" android:paddingleft= "@dimen/activity_horizontal_margin" Android: paddingright= "@dimen/activity_horizontal_margin" android:paddingtop= "@dimen/activity_vertical_margin" > < TextView android:id= "@+id/totaltextview" android:layout_width= "Wrap_content" android:layout_height= "W Rap_content "android:text=" system Memory: "android:textsize=" 25SP "android:textcolor=" #1cf109 "/> <te Xtview android:id= "@+id/totalmemorytextview" android:layout_width= "Wrap_content" Android:layout_heigh t= "Wrap_content" android:layout_torightof= "@id/totaltextview" android:textsize= "25SP" Android:textcol Or= "#1cf109"/> <textview android:id= "@+id/Availtextview "android:layout_width=" wrap_content "android:layout_height=" Wrap_content "android:layou t_below= "@id/totaltextview" android:text= "Available Memory:" android:textsize= "25SP" android:textcolor= "#5c0169" /> <textview android:id= "@+id/availmemorytextview" android:layout_width= "Wrap_content" Andro id:layout_height= "Wrap_content" android:layout_below= "@id/totaltextview" android:layout_torightof= "@id/avail TextView "android:textsize=" 25sp "android:textcolor=" #5c0169 "/> <button android:id=" @+id/cl Eanbutton "android:layout_width=" fill_parent "android:layout_height=" Wrap_content "Android:layout_bel ow= "@id/availmemorytextview" android:textsize= "25sp" android:text= "clean Memory"/> <scrollview Android Oid:layout_width= "Fill_parent" android:layout_height= "wrap_content" android:layout_below= "@id/cleanbutton" &        Gt <textview           Android:id= "@+id/cleaninfotextview" android:layout_width= "Fill_parent" Android:layout_hei ght= "Wrap_content"/> </ScrollView></RelativeLayout>

PS: Better way see Android Cleanup device Memory Detailed complete example (i)