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我想旋轉屏幕上的2個圓圈。按下按鈕時，一個圓圈順時針旋轉，其他圓圈逆時針旋轉。兩者將旋轉90度，然後停止，直到下一個按鈕單擊。
它的工作，但它看起來非常糟糕。而不是同時旋轉，第一個圓圈旋轉，然後是第二個圓圈。
我讀了關於動畫，但我發現的所有例子展示瞭如何旋轉整個畫布。可能我沒有在正確的位置尋找，並且有辦法以某種方式將動畫分配給對象。
我在下面添加了我的代碼。我很抱歉它不是一個真正的SSCCE，但當我的自定義SurfaceView是主要活動下的內部類時，我得到了錯誤。
Android - 如何旋轉多個2D圖形對象
任何意見或如何正確地做到這一點非常感謝。 活動
package sscce.android.rotation;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class SscceRotationActivity extends Activity implements OnClickListener {
private MySurfaceView mySurfaceView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.btnClockwise).setOnClickListener(this);
findViewById(R.id.btnCounterClockwise).setOnClickListener(this);
mySurfaceView = (MySurfaceView) (findViewById(R.id.surfaceView1));
}
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.btnClockwise:
mySurfaceView.rotate(true);
break;
case R.id.btnCounterClockwise:
mySurfaceView.rotate(false);
break;
}
}
}
自定義SurfaceView
package sscce.android.rotation;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class MySurfaceView extends SurfaceView implements
SurfaceHolder.Callback {
private Circle circle1;
private Circle circle2;
private DrawThread drawThread;
public MySurfaceView(Context context) {
super(context);
initialize();
}
public MySurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
initialize();
}
public MySurfaceView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initialize();
}
private void initialize() {
getHolder().addCallback(this);
drawThread = new DrawThread(getHolder(), this);
setFocusable(true);
}
public void surfaceCreated(SurfaceHolder holder) {
circle1 = new Circle(getWidth()/2, getHeight()/2, 50);
circle2 = new Circle(getWidth()/2, getHeight()/2, 80);
drawThread.setRunning(true);
drawThread.start();
}
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
public void surfaceDestroyed(SurfaceHolder arg0) {
boolean retry = true;
drawThread.setRunning(false);
while (retry) {
try {
drawThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
public void onDraw(Canvas canvas) {
circle2.onDraw(canvas);
circle1.onDraw(canvas);
}
public void rotate(boolean clockWise) {
Rotator rotator1 = new Rotator(circle1, clockWise);
Rotator rotator2 = new Rotator(circle2, !clockWise);
rotator1.run();
rotator2.run();
}
private class Circle {
private RectF rectF;
private int rotationAngle = 0;
MyPaint bluePaint = new MyPaint(1, Paint.Cap.SQUARE, Paint.Style.FILL,
Color.BLUE);
MyPaint redPaint = new MyPaint(1, Paint.Cap.SQUARE, Paint.Style.FILL,
Color.RED);
MyPaint yellowPaint = new MyPaint(1, Paint.Cap.SQUARE,
Paint.Style.FILL, Color.YELLOW);
MyPaint greenPaint = new MyPaint(1, Paint.Cap.SQUARE, Paint.Style.FILL,
Color.GREEN);
MyPaint borderPaint = new MyPaint(3, Paint.Cap.SQUARE,
Paint.Style.STROKE, Color.WHITE);
public Circle(int centerX, int centerY, int radius) {
rectF = new RectF(new Rect(centerX - radius, centerY - radius,
centerX + radius, centerY + radius));
}
public void rotateClockwise() {
for (int i = 0; i < 90; i++) {
rotationAngle++;
if (rotationAngle == 360) {
rotationAngle = 0;
return;
}
try {
Thread.sleep(20, 0);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void rotateCounterClockwise() {
for (int i = 0; i < 90; i++) {
rotationAngle--;
if (rotationAngle == 0) {
rotationAngle = 360;
return;
}
try {
Thread.sleep(20, 0);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void onDraw(Canvas canvas) {
canvas.drawArc(rectF, (0 + rotationAngle) % 360, 90, true,
bluePaint);
canvas.drawArc(rectF, (90 + rotationAngle) % 360, 90, true,
redPaint);
canvas.drawArc(rectF, (180 + rotationAngle) % 360, 90, true,
yellowPaint);
canvas.drawArc(rectF, (270 + rotationAngle) % 360, 90, true,
greenPaint);
canvas.drawArc(rectF, 0, 360, true, borderPaint);
}
private class MyPaint extends Paint {
public MyPaint(int strokeWidth, Paint.Cap cap, Paint.Style style,
int color) {
setStrokeWidth(strokeWidth);
setAntiAlias(true);
setStrokeCap(cap);
setStyle(style);
setColor(color);
}
}
}
private class Rotator extends Thread {
private Circle circle;
private boolean clockwise;
public Rotator(Circle circle, boolean clockwise) {
this.circle = circle;
this.clockwise = clockwise;
}
@Override
public void run() {
if (clockwise) {
circle.rotateClockwise();
} else {
circle.rotateCounterClockwise();
}
}
}
private class DrawThread extends Thread {
private SurfaceHolder surfaceHolder;
private MySurfaceView surfaceView;
private boolean run = false;
public DrawThread(SurfaceHolder surfaceHolder, MySurfaceView surfaceView) {
this.surfaceHolder = surfaceHolder;
this.surfaceView = surfaceView;
run = false;
}
public void setRunning(boolean run) {
Log.d("[email protected]", "Run status is " + run);
this.run = run;
}
@Override
public void run() {
Canvas canvas = null;
while (run) {
try {
canvas = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
surfaceView.onDraw(canvas);
}
} finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
}
}
佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<sscce.android.rotation.MySurfaceView
android:id="@+id/surfaceView1"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center" >
<Button
android:id="@+id/btnClockwise"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Clockwise" />
<Button
android:id="@+id/btnCounterClockwise"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Counter Clockwise" />
</LinearLayout>
</LinearLayout>
謝謝，解決了它。 – Yoav