Printing in android only searching the printers -
i have made android app in have tried print sample text file,i want use wifi connected printers,i tried linkwifi printing in android goes searching wifi printer , nothing,my code below,please me , save life
code
public class mainactivity extends activity { public int pageheight; public int pagewidth; public pdfdocument mypdfdocument; public int totalpages = 4; button button1; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); button1 = (button) findviewbyid(r.id.button1); } printdocumentadapter pda = new printdocumentadapter() { @override public void onwrite(pagerange[] pages, parcelfiledescriptor destination, cancellationsignal cancellationsignal, writeresultcallback callback) { inputstream input = null; outputstream output = null; try { input = getassets().open("sample.txt"); output = new fileoutputstream(destination.getfiledescriptor()); byte[] buf = new byte[1024]; int bytesread; while ((bytesread = input.read(buf)) > 0) { output.write(buf, 0, bytesread); } callback.onwritefinished(new pagerange[] { pagerange.all_pages }); } catch (filenotfoundexception ee) { // catch exception } catch (exception e) { // catch exception } { try { input.close(); output.close(); } catch (ioexception e) { e.printstacktrace(); } } } @suppresslint("inlinedapi") @override public void onlayout(printattributes oldattributes, printattributes newattributes, cancellationsignal cancellationsignal, layoutresultcallback callback, bundle extras) { if (cancellationsignal.iscanceled()) { callback.onlayoutcancelled(); return; } //int pages = computepagecount(newattributes); printdocumentinfo pdi = new printdocumentinfo.builder( "name of file").setcontenttype( printdocumentinfo.content_type_document).build(); callback.onlayoutfinished(pdi, true); } }; @suppresslint("inlinedapi") public void printdocument(view view) { printmanager printmanager = (printmanager) .getsystemservice(context.print_service); string jobname = this.getstring(r.string.app_name) + " document"; printmanager.print(jobname, pda, null); } } manifest
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.wifiprint" android:versioncode="1" android:versionname="1.0" > <uses-sdk android:minsdkversion="8" android:targetsdkversion="21" /> <uses-feature android:name="android.hardware.wifi" /> <uses-permission android:name="android.permission.access_wifi_state" /> <uses-permission android:name="android.permission.access_network_state" /> <uses-permission android:name="android.permission.change_wifi_state" /> <uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.read_external_storage" /> <application android:allowbackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/apptheme" > <activity android:name=".mainactivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> </application> </manifest>
you should make button listener first button event.
button button1 = (button) findviewbyid(r.id.button1); button1.setonclicklistener(new view.onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub docustomprint(); } }); and print method custom document print;
private void docustomprint() { printdocumentadapter pda = new printdocumentadapter(){ @override public void onwrite(pagerange[] pages, parcelfiledescriptor destination, cancellationsignal cancellationsignal, writeresultcallback callback){ inputstream input = null; outputstream output = null; assetmanager assetmanager = getassets(); try { // file print. input = assetmanager.open("abc.pdf"); output = new fileoutputstream(destination.getfiledescriptor()); byte[] buf = new byte[1024]; int bytesread; while ((bytesread = input.read(buf)) > 0) { output.write(buf, 0, bytesread); } callback.onwritefinished(new pagerange[]{pagerange.all_pages}); } catch (filenotfoundexception ee){ //catch exception } catch (exception e) { //catch exception } { try { input.close(); output.close(); } catch (ioexception e) { e.printstacktrace(); } } } @override public void onlayout(printattributes oldattributes, printattributes newattributes, cancellationsignal cancellationsignal, layoutresultcallback callback, bundle extras){ if (cancellationsignal.iscanceled()) { callback.onlayoutcancelled(); return; } printdocumentinfo pdi = new printdocumentinfo.builder("print_doc.pdf").setcontenttype(printdocumentinfo.content_type_document).build(); callback.onlayoutfinished(pdi, true); } }; printmanager printmanager = (printmanager) this.getsystemservice(context.print_service); string jobname = this.getstring(r.string.app_name) + " document"; printmanager.print(jobname, pda, null); } and check documents.
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