令人头疼的自定义view与属性动画(亲测水不是一般的深) 令人头疼的自定义view与属性动

很详细的博客,可惜太高深 https://blog.csdn.net/sailist/article/details/81609726#%E5%8E%9F%E7%90%86%E7%AF%87画圆,xml中全包名引用 (那个activity用就写到布局里) package com.baway.show; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.AttributeSet; import android.view.View; import com.baway.R; public class AnimatorCircle extends View { private int width; private int hight; private Paint paint; public AnimatorCircle(Context context) { super(context); }public AnimatorCircle(Context context, AttributeSet attrs) { super(context, attrs); }public AnimatorCircle(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); }@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); paint = new Paint(); int color = Color.argb(120,85,85,55); Resources resources = getResources(); int color1 = resources.getColor(R.color.green); paint.setColor(color1); canvas.drawCircle(width/2,280,300,paint); }@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); width= getMeasuredWidth(); hight = getMeasuredHeight(); } }

【令人头疼的自定义view与属性动画(亲测水不是一般的深)】activity里操作组合动画

package com.baway; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.View; import com.baway.show.AnimatorCircle; public class ShowActivity extends AppCompatActivity {private AnimatorCircle yuan; private AnimatorSet set; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_show); yuan = findViewById(R.id.yuan); getSupportActionBar().hide(); DisplayMetrics displayMetrics = getResources().getDisplayMetrics(); int height = displayMetrics.heightPixels; //缩放 ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(yuan, "scaleX", 2, 1); //旋转 ObjectAnimator objectAnimator1 = ObjectAnimator.ofFloat(yuan, "rotation", 0, 360); ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(yuan, "alpha", 0, 1); ObjectAnimator objectAnimator3 = ObjectAnimator.ofFloat(yuan, "translationY", height/2-yuan.getHeight()/2); set = new AnimatorSet(); set.play(objectAnimator).with(objectAnimator1).with(objectAnimator2).with(objectAnimator3); set.setDuration(5000); set.start(); yuan.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { set.start(); } }); } }