android - Adding drawable image to background of canvas -
i know possible paint background of canvas using
mpaint = new paint(); mpaint.setcolor(color.red); im wondering how set permanent background it. ive tried using xml file nothing happens. ideas?
this source code of project, ive been following tutorial how because im unfamiliar bitmaps.
canvas class
import android.content.context; import android.graphics.bitmap; import android.graphics.bitmapfactory; import android.graphics.canvas; import android.graphics.color; import android.graphics.paint; import android.graphics.rect; import android.util.attributeset; import android.view.view; import android.widget.imageview; public class gameboard extends view{ private int mflagx = -1; private int mflagy = -1; private bitmap mbitmap = null; private bitmap nbitmap = null; private paint mpaint = null; private boolean isflaghidden = false; private int mboundx = -1; private int mboundy = -1; //play these values make app more or less challenging public final int closer = 50; public final int close = 100; public gameboard(context context, attributeset aset) { super(context, aset); //load our bitmap mbitmap = bitmapfactory.decoderesource(getresources(), r.drawable.star); //create paint brush mpaint = new paint(); mpaint.setcolor(color.red); } @override public void ondraw(canvas canvas) { //initialize if ((mflagx < 1) || (mflagy < 1)) { mflagx = (int) (getwidth() / 2) - mbitmap.getwidth() / 2; mflagy = (int) (getheight() / 2) - mbitmap.getheight() / 2; mboundx = (int)getwidth() - mbitmap.getwidth(); mboundy = (int)getheight() - mbitmap.getheight(); } //draw background canvas.drawrect(0, 0, getwidth(), getheight(), mpaint); //draw flag if (!isflaghidden) { canvas.drawbitmap(mbitmap, mflagx, mflagy, null); } } public void hidetheflag(){ //randomize flag location mflagx = (int) math.ceil(math.random() * mboundx); mflagy = (int) math.ceil(math.random() * mboundy); isflaghidden = true; //force redraw invalidate(); } public void giveup(){ isflaghidden = false; //force redraw invalidate(); } public indicators takeaguess(float x, float y) { //this our "warm" area rect prettyclose = new rect(mflagx - close, mflagy - close, mflagx+mbitmap.getwidth() + close, mflagy+mbitmap.getheight() + close); //normalize if (prettyclose.left < 0) prettyclose.left = 0; if (prettyclose.top < 0) prettyclose.top = 0; if (prettyclose.right > mboundx) prettyclose.right = mboundx; if (prettyclose.bottom > mboundy) prettyclose.bottom = mboundy; //this our "hot" area rect reallyclose = new rect(mflagx - closer, mflagy - closer, mflagx+mbitmap.getwidth() + closer, mflagy+mbitmap.getheight() + closer); //normalize if (reallyclose.left < 0) reallyclose.left = 0; if (reallyclose.top < 0) reallyclose.top = 0; if (reallyclose.right > mboundx) reallyclose.right = mboundx; if (reallyclose.bottom > mboundy) reallyclose.bottom = mboundy; //this area contains our flag rect bullseye = new rect(mflagx, mflagy, mflagx+mbitmap.getwidth(), mflagy+mbitmap.getheight()); //check see on board user pressed if (bullseye.contains((int) x, (int)y)) { //found isflaghidden = false; invalidate(); return indicators.bullseye; } else if (reallyclose.contains((int) x, (int)y)) { //hot return indicators.hot; } else if (prettyclose.contains((int)x, (int)y)) { //warm return indicators.warm; } else { //not close return indicators.cold; } } } game class
import android.app.activity; import android.graphics.color; import android.os.bundle; import android.view.motionevent; import android.view.view; import android.view.view.onclicklistener; import android.view.view.ontouchlistener; import android.widget.button; import android.widget.textview; public class findthestar extends activity implements ontouchlistener, onclicklistener{ private gameboard mgameboard = null; private boolean isflaghidden = false; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main_star); mgameboard = (gameboard) findviewbyid(r.id.hide_canvas); mgameboard.setontouchlistener(this); button b = (button) findviewbyid(r.id.the_button); b.setonclicklistener(this); } @override public boolean ontouch(view v, motionevent event) { if (v.getid() == r.id.hide_canvas) { if (event.getaction() == motionevent.action_down) { if (isflaghidden) { textview tv = (textview)findviewbyid (r.id.the_label); switch (mgameboard.takeaguess(event.getx(), event.gety())) { case bullseye: button b = (button) findviewbyid(r.id.the_button); isflaghidden = false; b.settext("go hide!"); tv.settext("you found me!"); tv.settextcolor(color.green); break; case hot: tv.settext("you're hot!"); tv.settextcolor(color.red); break; case warm: tv.settext("getting warm..."); tv.settextcolor(color.yellow); break; case cold: tv.settext("you're cold."); tv.settextcolor(color.blue); break; } } } return true; } return false; } @override public void onclick(view v) { if (v.getid() == r.id.the_button) { textview tv = (textview)findviewbyid (r.id.the_label); tv.settext(""); button b = (button) findviewbyid(r.id.the_button); isflaghidden = !isflaghidden; if (isflaghidden) { b.settext("can't find me?"); mgameboard.hidetheflag(); } else { b.settext("go hide!"); mgameboard.giveup(); } } } } xml file
<?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"> <textview android:id="@+id/the_label" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:gravity="center" android:textsize="20sp" android:layout_marginbottom="10dip" android:text="lets play hide , seek!"/> <button android:id="@+id/the_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:gravity="center" android:layout_marginbottom="10dip" android:text="go hide!"/> <app.autismapp.gameboard android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/hide_canvas"/> </linearlayout>
yes can set permanent background using xml layout..i done creating 2 class.
this code in mainactivity
protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); final brushview view=new brushview(this); setcontentview(r.layout.mylayout);//removed 1 if paint doesnt work view.setbackgroundresource(r.drawable.background);//to set background setcontentview(view);// display background and second class
public class paintview extends view { private paint paint = new paint(); public layoutparams params; public paintview(context context) { super(context); paint.setantialias(true); paint.setcolor(color.blue); i hope gives idea
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