how to draw a Bitmap and move it in java Android? -


i have spent month trying of together.

  • draw bitmap screen
  • on create move bitmap down @ constant rate
  • stop bimap when reaches bottom
  • allow bitmap clicked on while moves (a.k.a. not translation animation)

thanks helping put in advance. here attempt:

package com.example.animating;  import android.annotation.suppresslint; 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.view.view;   public class firstview extends view {      private int screenw;     private int screenh;      private float drawscalew;     private float drawscaleh;      int moverate = 10, dot1y, dot1x;      private context mycontext;      private bitmap dot;     private boolean dotsinking = true, gameover = false;      public firstview(context context) {         super(context);         mycontext = context;     }      @override     protected void onsizechanged(int w, int h, int oldw, int oldh) {         super.onsizechanged(w, h, oldw, oldh);         dot = bitmapfactory.decoderesource(mycontext.getresources(), r.drawable.dot);         screenw = w;         screenh = h;         drawscalew = (float) screenw / 800;         drawscaleh = (float) screenh / 600;         dot1y = (int) (475*drawscaleh);         dot1x = (int) (55*drawscalew);     }      public void run() {         if (!gameover) {             animatedot();         }     }      @suppresslint("drawallocation")     @override     protected void ondraw(canvas canvas) {         paint redpaint = new paint();         redpaint.setcolor(color.red);         canvas.drawbitmap(dot, dot1x, dot1y, null);     }      private void animatedot(){         if (dotsinking) {             dot1y -= moverate;         }     } }

to answer first part of question

activity_main.xml

<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" tools:context=".mainactivity" >  <linearlayout     android:id="@+id/textview1"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:layout_above="@+id/button1"      />  <button     android:id="@+id/button1"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentbottom="true"     android:layout_centerhorizontal="true"     android:text="button" />  </relativelayout>

mainactivity class

public class mainactivity extends activity {      firstview dv;      @override      protected void oncreate(bundle savedinstancestate) {      super.oncreate(savedinstancestate);     dv = new firstview(this);     setcontentview(r.layout.activity_main);     final button b= (button) findviewbyid(r.id.button1);     b.setonclicklistener(new onclicklistener()     {         public void onclick(view v) {             // todo auto-generated method stub             linearlayout rl= (linearlayout ) findviewbyid(r.id.textview1);             rl.addview(dv);             b.setvisibility(view.invisible);          }     });          } public class firstview extends view {  private int screenw; private int screenh;  private float drawscalew; private float drawscaleh;  int moverate = 10, dot1y, dot1x;  private context mycontext;  private bitmap dot; private boolean dotsinking = true, gameover = false;   public firstview(context context) { super(context); mycontext = context; }  @override protected void onsizechanged(int w, int h, int oldw, int oldh) { super.onsizechanged(w, h, oldw, oldh); dot = bitmapfactory.decoderesource(mycontext.getresources(), r.drawable.ic_launcher); screenw = w; screenh = h; drawscalew = (float) screenw / 800; drawscaleh = (float) screenh / 600; dot1y = 0+dot.getheight(); dot1x = w/2-(dot.getwidth()/2); }  public void run() { if (!gameover) {     animatedot();       invalidate(); } } @override protected void ondraw(canvas canvas) { paint redpaint = new paint(); redpaint.setcolor(color.red); canvas.drawbitmap(dot, dot1x, dot1y, null); run(); } private void animatedot(){ if (dotsinking) {     if(dot1y<screenh-dot.getheight())     dot1y += moverate; }  } }

i have button @ bottom of screen. when clicked (button becomes invisible) image moves top height of layout. when reaches layout height stops.

enter image description here don't know how add click listener image moving.

answered first part of question. modify above according needs.


Comments

Post a Comment

Popular posts from this blog

jquery - How can I dynamically add a browser tab? -

since using iframes house external pages are, accounts "not preferred method" , disallowed sites (flickr, one), want dynamically generate browser tabs. e.g., when user submits form, want dynamically generate tab on browser in response submitted. e.g., might want add new tab url like: http://www.bigsurgarrapata.com/contact how in jquery? you want form target attribute action attribute. http://www.w3schools.com/tags/att_form_target.asp browsers have ultimate control on result of target attribute open new tab value of _blank. <form action="contact_submit.php" target="_blank" method="post">
Read more

keyboard - C++ GetAsyncKeyState alternative -

i using windows.h library's getasynckeystate function define key pushed on keyboard . here program returns int value of pushed key example. #include <iostream> #include <windows.h> using namespace std; int main (){ char i; for(i=8;i<190;i++){ if(getasynckeystate(i)== -32767){ cout<<int (i)<<endl; } } return 0; } but trying make opengl simple game , function appeared slow . there function not need cycle 180 times , if statement . thanks you're trying make opengl game, you're going use glfw. if that's case can away using glfwgetkey() such: if (glfwgetkey(glfw_key_up) == glfw_press) {...} if (glfwgetkey(glfw_key_down) == glfw_press) {...} that method nicely explained in tutorial 6 opengl-tutorial.org . should start first tutorial of beginners tutorials , later intermediate tutorials . if you're going make win32 window can listen wm_keydown or wm_keyup messages , virtua...
Read more

android - java.net.UnknownHostException(Unable to resolve host “URL”: No address associated with hostname) -

i developing app testing asp.net webservice in android.for simple webservice adding 2 numbers used.where numbers passed parameters.the result in dialogue.the webserver works in local. when application runs following result exception.i provided internet permission in manifest. java.net.unknownhostexception(unable resolve host “ http://url.com/ ”: no address associated hostname) my code given below main activity public static string rslt=""; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); button b1=(button)findviewbyid(r.id.button1); final alertdialog ad=new alertdialog.builder(this).create(); b1.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub try { ...
Read more