Android中使用抖动动画吸引来用户注意-属性动画

使用属性动画实现view抖动效果

如图：

代码：

1、布局

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity2">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:src="@drawable/shake"
        android:id="@+id/iv_shake"></ImageView>

    <Button
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:id="@+id/btn_shake"
        android:text="抖动"
        app:layout_constraintTop_toBottomOf="@+id/iv_shake"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginTop="30dp"></Button>

</androidx.constraintlayout.widget.ConstraintLayout>

　2、MainActivity

　

public class MainActivity2 extends AppCompatActivity {

    private ImageView iv_shake;
    private Button btn_shake;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        iv_shake = findViewById(R.id.iv_shake);

        btn_shake = findViewById(R.id.btn_shake);
        btn_shake.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

               startShakeByPropertyAnim(iv_shake, 0.9f, 1.1f, 10f, 1000);
            }
        });





    }

   

    private void startShakeByPropertyAnim(View view, float scaleSmall, float scaleLarge, float shakeDegrees, long duration) {
        if (view == null) {
            return;
        }
        //TODO 验证参数的有效性

        //先变小后变大
        PropertyValuesHolder scaleXValuesHolder = PropertyValuesHolder.ofKeyframe(View.SCALE_X,
                Keyframe.ofFloat(0f, 1.0f),
                Keyframe.ofFloat(0.25f, scaleSmall),
                Keyframe.ofFloat(0.5f, scaleLarge),
                Keyframe.ofFloat(0.75f, scaleLarge),
                Keyframe.ofFloat(1.0f, 1.0f)
        );
        PropertyValuesHolder scaleYValuesHolder = PropertyValuesHolder.ofKeyframe(View.SCALE_Y,
                Keyframe.ofFloat(0f, 1.0f),
                Keyframe.ofFloat(0.25f, scaleSmall),
                Keyframe.ofFloat(0.5f, scaleLarge),
                Keyframe.ofFloat(0.75f, scaleLarge),
                Keyframe.ofFloat(1.0f, 1.0f)
        );

        //先往左再往右
        PropertyValuesHolder rotateValuesHolder = PropertyValuesHolder.ofKeyframe(View.ROTATION,
                Keyframe.ofFloat(0f, 0f),
                Keyframe.ofFloat(0.1f, -shakeDegrees),
                Keyframe.ofFloat(0.2f, shakeDegrees),
                Keyframe.ofFloat(0.3f, -shakeDegrees),
                Keyframe.ofFloat(0.4f, shakeDegrees),
                Keyframe.ofFloat(0.5f, -shakeDegrees),
                Keyframe.ofFloat(0.6f, shakeDegrees),
                Keyframe.ofFloat(0.7f, -shakeDegrees),
                Keyframe.ofFloat(0.8f, shakeDegrees),
                Keyframe.ofFloat(0.9f, -shakeDegrees),
                Keyframe.ofFloat(1.0f, 0f)
        );

        ObjectAnimator objectAnimator = ObjectAnimator.ofPropertyValuesHolder(view, scaleXValuesHolder, scaleYValuesHolder, rotateValuesHolder);
        objectAnimator.setDuration(duration);
        objectAnimator.start();
    }
}