/
Practice11CameraRotateView.java
79 lines (65 loc) · 2.26 KB
/
Practice11CameraRotateView.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
package com.geekholt.practiceui.view.lesson4;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Camera;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import androidx.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.LinearInterpolator;
import com.geekholt.practiceui.R;
public class Practice11CameraRotateView extends View {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
Bitmap bitmap;
Point point1 = new Point(200, 200);
Point point2 = new Point(600, 200);
Camera camera = new Camera();
int degree;
ObjectAnimator animator = ObjectAnimator.ofInt(this, "degree", 0, 360);
public Practice11CameraRotateView(Context context) {
super(context);
}
public Practice11CameraRotateView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public Practice11CameraRotateView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
{
animator.setDuration(2000);
animator.setInterpolator(new LinearInterpolator());
animator.setRepeatCount(ValueAnimator.INFINITE);
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.maps);
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
animator.start();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
animator.end();
}
@SuppressWarnings("unused")
public void setDegree(int degree) {
this.degree = degree;
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.save();
camera.save();// 保存 Camera 的状态
camera.rotateX(degree); // 旋转 Camera 的三维空间
camera.applyToCanvas(canvas); // 把旋转投影到 Canvas
camera.restore();// 恢复 Camera 的状态
canvas.drawBitmap(bitmap, point1.x, point1.y, paint);
canvas.restore();
}
}