动画

第一步：在value里面写attrs.xml

 <declare-styleable name="MyTextView2">
        <attr name="myText" format="string"/>
        <attr name="myTextColor" format="color"/>
        <attr name="myTextSize" format="dimension"/>
    </declare-styleable>

第二步：自定义View并继承View

package com.example.lian0324.activity;

import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.LinearInterpolator;

import com.example.lian0324.R;

/**
 * <p>文件描述：<p>
 * <p>作者：董少博<p>
 * <p>创建时间：2019/3/7<p>
 * <p>更改时间：2019/3/7<p>
 * <p>版本号：1<p>
 */
public class QiuView extends View {

    Paint paint=new Paint();
    int w,h;
    String myText;
    int myTextColor;
    float myTextSize;

    public QiuView(Context context) {
        super(context);
    }

    public QiuView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);

        paint.setColor(Color.RED);
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.FILL);
        paint.setStrokeWidth(20);

        TypedArray typedArray=context.obtainStyledAttributes(attrs, R.styleable.MyTextView2);
        myText=typedArray.getString(R.styleable.MyTextView2_myText);
        myTextColor=typedArray.getColor(R.styleable.MyTextView2_myTextColor,Color.BLACK);
        myTextSize=typedArray.getDimension(R.styleable.MyTextView2_myTextSize,30f);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(100,100,60,paint);
        if (isgong) {

        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        w=getMeasuredWidth();
        h=getMeasuredHeight();
    }
    boolean isgong=true;
    ValueAnimator valueAnimator;
    private void startAnimator(){
        isgong=false;
        valueAnimator=ValueAnimator.ofInt(0,w);
        valueAnimator.setDuration(3000);
        valueAnimator.setRepeatCount(ValueAnimator.INFINITE);
        valueAnimator.setInterpolator(new LinearInterpolator());
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                animation.getAnimatedValue();
                postInvalidate();
            }
        });
        valueAnimator.start();
    }
}

第三步：写布局：

  <com.example.lian0324.activity.QiuView
        android:id="@+id/myqiu"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        qq:myText="要写的内容"
        qq:myTextColor="#00ff00"
        qq:myTextSize="25sp" />

第四步：在Activity里面写并继承AppCompatActivity：

QiuView qiuView;
    ObjectAnimator objectAnimator;
    ObjectAnimator objectAnimator1;

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

       qiuView=findViewById(R.id.myqiu);
       objectAnimator=ObjectAnimator.ofFloat(qiuView,"translationX",0,1000);
       objectAnimator1=ObjectAnimator.ofFloat(qiuView,"translationY",0,1700);
        AnimatorSet animatorSet=new AnimatorSet();
        animatorSet.setDuration(3000);
        animatorSet.play(objectAnimator).with(objectAnimator1);
        animatorSet.start();
        animatorSet.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                startActivity(new Intent(MainActivity.this,LoginActivity.class));
                finish();
            }
        });
    }
}