i'm having android surfaceview , in i'm trying add buttons this. in surfaceview canvas draw something. , have thread class keep drawing.
package com.androidsurfaceview; import android.app.activity; import android.os.bundle; import android.view.view; import android.widget.button; public class androidsurfaceview extends activity { /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); button buttonshowhide = (button)findviewbyid(r.id.showhide); final button buttondummy = (button)findviewbyid(r.id.dummy); buttonshowhide.setonclicklistener( new button.onclicklistener(){ @override public void onclick(view arg0) { // todo auto-generated method stub if(buttondummy.getvisibility()==view.visible){ buttondummy.setvisibility(view.gone); } else{ buttondummy.setvisibility(view.visible); } } } ); the thread class
package com.androidsurfaceview; import android.graphics.canvas; import android.view.surfaceholder; public class mysurfacethread extends thread { private surfaceholder mythreadsurfaceholder; private com.androidsurfaceview.test.mysurfaceview mythreadsurfaceview; private boolean mythreadrun = false; public mysurfacethread(surfaceholder surfaceholder, com.androidsurfaceview.test.mysurfaceview surfaceview) { mythreadsurfaceholder = surfaceholder; mythreadsurfaceview = surfaceview; } public void setrunning(boolean b) { mythreadrun = b; } @override public void run() { // todo auto-generated method stub while(mythreadrun){ canvas c = null; try{ c = mythreadsurfaceholder.lockcanvas(null); synchronized (mythreadsurfaceholder){ mythreadsurfaceview.ondraw(c); } sleep(100); } catch (interruptedexception e) { // todo auto-generated catch block e.printstacktrace(); } finally{ // in if exception thrown // during above, don't leave surface in // inconsistent state if (c != null) { mythreadsurfaceholder.unlockcanvasandpost(c); } } } } } the surfaceview & class drawing
package com.androidsurfaceview; import android.app.activity; import android.content.context; import android.graphics.canvas; import android.graphics.color; import android.graphics.paint; import android.util.attributeset; import android.view.surfaceholder; import android.view.surfaceview; public class test extends activity{ // ...... // few things here... class test. public class mysurfaceview extends surfaceview implements surfaceholder.callback{ private mysurfacethread thread; private paint paint = new paint(paint.anti_alias_flag); int cx, cy, offx, offy; public mysurfaceview(context context) { super(context); // todo auto-generated constructor stub init(); } public mysurfaceview(context context, attributeset attrs) { super(context, attrs); // todo auto-generated constructor stub init(); } public mysurfaceview(context context, attributeset attrs, int defstyle) { super(context, attrs, defstyle); // todo auto-generated constructor stub init(); } private void init(){ getholder().addcallback(this); thread = new mysurfacethread(getholder(), this); setfocusable(true); // make sure key events paint.setstyle(paint.style.stroke); paint.setstrokewidth(3); paint.setcolor(color.white); cx = 0; cy = 0; offx = 10; offy = 10; } @override public void surfacechanged(surfaceholder arg0, int arg1, int arg2, int arg3) { // todo auto-generated method stub } @override public void surfacecreated(surfaceholder holder) { // todo auto-generated method stub thread.setrunning(true); thread.start(); } @override public void surfacedestroyed(surfaceholder holder) { // todo auto-generated method stub boolean retry = true; thread.setrunning(false); while (retry) { try { thread.join(); retry = false; } catch (interruptedexception e) { } } } ////just simple graphic of moving circle. @override protected void ondraw(canvas canvas) { // todo auto-generated method stub canvas.drawrgb(0, 0, 0); canvas.drawcircle(cx, cy, 3, paint); cx += offx; if (cx > getwidth() || (cx < 0)){ offx *= -1; cx += offx; } cy += offy; if (cy > getheight() || (cy < 0)){ offy *= -1; cy += offy; } } } } here main.xml
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <button android:id="@+id/showhide" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="toggle button show/hide" /> <button android:id="@+id/dummy" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="a button" /> <framelayout android:layout_width="fill_parent" android:layout_height="fill_parent"> <com.androidsurfaceview.test.mysurfaceview android:layout_width="fill_parent" android:layout_height="fill_parent"/> </framelayout> </linearlayout> problem: above code works only if dont have "mysurfaceview" nested class. outer class "test" following error. if remove "class test" works fine.
error/crash
04-29 11:43:18.977: error/androidruntime(21832): fatal exception: main 04-29 11:43:18.977: error/androidruntime(21832): java.lang.runtimeexception: unable start activity componentinfo{com.androidsurfaceview/com.androidsurfaceview.androidsurfaceview}: **android.view.inflateexception: binary xml file line #20: error inflating class com.androidsurfaceview.test.mysurfaceview** 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread.performlaunchactivity(activitythread.java:2663) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread.handlelaunchactivity(activitythread.java:2679) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread.access$2300(activitythread.java:125) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread$h.handlemessage(activitythread.java:2033) 04-29 11:43:18.977: error/androidruntime(21832): @ android.os.handler.dispatchmessage(handler.java:99) 04-29 11:43:18.977: error/androidruntime(21832): @ android.os.looper.loop(looper.java:123) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread.main(activitythread.java:4627) 04-29 11:43:18.977: error/androidruntime(21832): @ java.lang.reflect.method.invokenative(native method) 04-29 11:43:18.977: error/androidruntime(21832): @ java.lang.reflect.method.invoke(method.java:521) 04-29 11:43:18.977: error/androidruntime(21832): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:868) 04-29 11:43:18.977: error/androidruntime(21832): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:626) 04-29 11:43:18.977: error/androidruntime(21832): @ dalvik.system.nativestart.main(native method) **04-29 11:43:18.977: error/androidruntime(21832): caused by: android.view.inflateexception: binary xml file line #20: error inflating class com.androidsurfaceview.test.mysurfaceview** 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.createviewfromtag(layoutinflater.java:576) 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.rinflate(layoutinflater.java:618) 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.rinflate(layoutinflater.java:621) 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.inflate(layoutinflater.java:407) 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.inflate(layoutinflater.java:320) 04-29 11:43:18.977: error/androidruntime(21832): @ android.view.layoutinflater.inflate(layoutinflater.java:276) 04-29 11:43:18.977: error/androidruntime(21832): @ com.android.internal.policy.impl.phonewindow.setcontentview(phonewindow.java:200) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activity.setcontentview(activity.java:1647) 04-29 11:43:18.977: error/androidruntime(21832): @ com.androidsurfaceview.androidsurfaceview.oncreate(androidsurfaceview.java:13) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1047) 04-29 11:43:18.977: error/androidruntime(21832): @ android.app.activitythread.performlaunchactivity(activitythread.java:2627) any great ...i'm stuck this.
first, must declare view static type, able inflated when no instance of holding class available:
public static class mysurfaceview extends surfaceview implements surfaceholder.callback the line
<com.androidsurfaceview.test.mysurfaceview in layout xml suggests, mysurfaceview class inside com.androidsurfaceview.test package, , tries inflate there, wrong.
in layout should follow package.class$innerclass form of declaration.
but since "$" illegal character, cannot write
<com.androidsurfaceview.test$mysurfaceview so must specify view in layout xml follows:
<view class="com.androidsurfaceview.test$mysurfaceview" android:layout_width="fill_parent" android:layout_height="fill_parent"/> this way work.
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