Created
October 13, 2011 14:16
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Surface view for creating animated arcs
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| package com.freefallhighscore.circles; | |
| import android.app.Activity; | |
| import android.graphics.Bitmap; | |
| import android.graphics.Canvas; | |
| import android.graphics.Paint; | |
| import android.graphics.RectF; | |
| import android.os.Bundle; | |
| import android.os.Handler; | |
| import android.os.SystemClock; | |
| import android.view.Gravity; | |
| import android.view.View; | |
| import android.view.ViewGroup.LayoutParams; | |
| import android.view.animation.Animation; | |
| import android.view.animation.AnimationSet; | |
| import android.view.animation.AnimationUtils; | |
| import android.view.animation.LinearInterpolator; | |
| import android.view.animation.RotateAnimation; | |
| import android.widget.ImageView; | |
| import android.widget.RelativeLayout; | |
| import android.widget.TextView; | |
| public class CirclesActivity extends Activity { | |
| /** Called when the activity is first created. */ | |
| private Handler mHandler = new Handler(); | |
| TextView tv; | |
| DrawCanvas canvasView; | |
| @Override | |
| public void onCreate(Bundle savedInstanceState) { | |
| super.onCreate(savedInstanceState); | |
| setContentView(R.layout.main); | |
| RelativeLayout wheel = (RelativeLayout) findViewById(R.id.wheel); | |
| canvasView = new DrawCanvas(this); | |
| wheel.addView(canvasView); | |
| } | |
| @Override | |
| protected void onResume() { | |
| // TODO Auto-generated method stub | |
| super.onResume(); | |
| canvasView.onResumeMySurfaceView(); | |
| } | |
| @Override | |
| protected void onPause() { | |
| // TODO Auto-generated method stub | |
| super.onPause(); | |
| canvasView.onPauseMySurfaceView(); | |
| } | |
| private Runnable mUpdateTimeTask = new Runnable() { | |
| long start = SystemClock.uptimeMillis(); | |
| public void run() { | |
| long millis = SystemClock.uptimeMillis() - start; | |
| canvasView.slice = millis/20000.0; | |
| //tv.setText(String.valueOf(canvasView.slice)); | |
| if(millis<20000) mHandler.postAtTime(this, start + millis); | |
| else{ | |
| mHandler.removeCallbacks(mUpdateTimeTask); | |
| } | |
| } | |
| }; | |
| public void go(View view){ | |
| mHandler.removeCallbacks(mUpdateTimeTask); //Remove old timer | |
| mHandler.postDelayed(mUpdateTimeTask, 100); | |
| } | |
| } |
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| package com.freefallhighscore.circles; | |
| import java.util.Random; | |
| import android.R.color; | |
| import android.content.Context; | |
| import android.graphics.Bitmap; | |
| import android.graphics.BitmapFactory; | |
| import android.graphics.Canvas; | |
| import android.graphics.Paint; | |
| import android.graphics.PixelFormat; | |
| import android.graphics.RectF; | |
| import android.util.AttributeSet; | |
| import android.view.SurfaceHolder; | |
| import android.view.SurfaceHolder.Callback; | |
| import android.view.SurfaceView; | |
| class DrawCanvas extends SurfaceView implements Runnable{ | |
| Thread thread = null; | |
| SurfaceHolder surfaceHolder; | |
| volatile boolean running = false; | |
| public double slice; | |
| public DrawCanvas(Context context) { | |
| super(context); | |
| // TODO Auto-generated constructor stub | |
| surfaceHolder = getHolder(); | |
| } | |
| public void onResumeMySurfaceView(){ | |
| running = true; | |
| thread = new Thread(this); | |
| thread.start(); | |
| } | |
| public void onPauseMySurfaceView(){ | |
| boolean retry = true; | |
| running = false; | |
| while(retry){ | |
| try { | |
| thread.join(); | |
| retry = false; | |
| } catch (InterruptedException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } | |
| } | |
| } | |
| public void run() { | |
| // TODO Auto-generated method stub | |
| while(running){ | |
| if(surfaceHolder.getSurface().isValid()){ | |
| surfaceHolder.setFormat(PixelFormat.TRANSPARENT); | |
| Canvas canvas = surfaceHolder.lockCanvas(); | |
| Paint mPaints = new Paint(); | |
| mPaints.setAntiAlias(true); | |
| //mPaints.setStyle(Paint.Style.FILL); | |
| mPaints.setColor(0x8800FF00); | |
| RectF bounds= new RectF( 0, 0, 100, 100); | |
| canvas.drawArc(bounds, -90, (float) (slice*360), true, mPaints); | |
| surfaceHolder.unlockCanvasAndPost(canvas); | |
| } | |
| } | |
| } | |
| } |
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| <?xml version="1.0" encoding="utf-8"?> | |
| <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" | |
| android:layout_width="fill_parent" | |
| android:layout_height="fill_parent" | |
| android:background="#bbbbbb" | |
| > | |
| <RelativeLayout | |
| android:id="@+id/wheel" | |
| android:layout_width="wrap_content" | |
| android:layout_height="wrap_content" | |
| android:layout_marginLeft="20dip" | |
| android:layout_marginBottom="20dip" | |
| android:layout_alignParentBottom="true" | |
| /> | |
| <Button | |
| android:id="@+id/btn" | |
| android:layout_width="wrap_content" | |
| android:layout_height="wrap_content" | |
| android:text="Touch Me" | |
| android:onClick="go" | |
| /> | |
| </RelativeLayout> |
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