Andriodjie——画圆3秒跳转

////欢迎页import android.animation.AnimatorSet;import android.animation.ObjectAnimator;import android.content.Intent;import android.os.AsyncTask;import android.os.Bundle;import android.os.Handler;import android.os.SystemClock;import android.support.v7.app.AppCompatActivity;import android.widget.ImageView;public class WelcomeActivity extends AppCompatActivity {    private ImageView iv;    private MyView myView;    int time = 3;    Handler handler = new Handler();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.welcome);        initView();        initAnimator();    }    private void initAnimator() {        AnimatorSet set = new AnimatorSet();        float y = iv.getTranslationY();        ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(iv,"translationY",y,450);        objectAnimator.setDuration(3000);        ObjectAnimator objectAnimator1 = ObjectAnimator.ofFloat(iv,"scaleY",1f,2f,1f);        objectAnimator1.setDuration(3000);        set.play(objectAnimator).before(objectAnimator1);        set.start();        handler.postDelayed(new Runnable() {            @Override            public void run() {                time--;                if(time == 0){                    Intent intent = new Intent(WelcomeActivity.this, MainActivity.class);                    startActivity(intent);                    finish();                }                handler.postDelayed(this,1000);            }        },3000);        new AsyncTask<String,Integer,String>(){            @Override            protected String doInBackground(String... strings) {                for (int i = 1; i <=4 ; i++) {                    SystemClock.sleep(1000);                    publishProgress(i);                }                return null;            }            @Override            protected void onProgressUpdate(Integer... values) {                myView.setProgress(values[0]);            }        }.execute();    }    private void initView() {        iv = (ImageView) findViewById(R.id.welcome_iv);        myView = (MyView) findViewById(R.id.myView);    }    @Override    protected void onDestroy() {        super.onDestroy();    }}

//编辑属性

import android.animation.ArgbEvaluator;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.graphics.RectF;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.View;/** *  */public class MyView extends View {    private Paint paint;    boolean flag = true;    private int mProgress = 0;    private int mCountProgress = 0;    private float mRadiuSize = 0;    private float mRingSize = 0;    private float mTextSize = 0;    private int mProgressColor = 0;    private int currentColor;    private ValueAnimator animator;     public MyView(Context context) {            super(context);            init();        }    private void init() {        paint = new Paint();        paint.setAntiAlias(true);    }    public MyView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);        getCustomAttr(context, attrs);        init();}    public MyView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        getCustomAttr(context, attrs);        init();    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        int widthMode = MeasureSpec.getMode(widthMeasureSpec);        int widthSize = MeasureSpec.getSize(widthMeasureSpec);        int heightMode = MeasureSpec.getMode(heightMeasureSpec);        int heightSize = MeasureSpec.getSize(heightMeasureSpec);        int width = 0;        int height = 0;        if (widthMode == MeasureSpec.AT_MOST) {            width = (int) (mRadiuSize * 2);        } else {            width = Math.max(widthSize, (int) (mRadiuSize * 2));        }        if (heightMode == MeasureSpec.AT_MOST) {            height = (int) (mRadiuSize * 2);        } else {            height = Math.max(heightSize, (int) (mRadiuSize * 2));        }        setMeasuredDimension(width, height);    }    private void getCustomAttr(Context context, AttributeSet attrs) {        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.MyView);        mRadiuSize = array.getDimension(R.styleable.MyView_radiuSize, 100);        mRingSize = array.getDimension(R.styleable.MyView_ringSize, 10);        mTextSize = array.getDimension(R.styleable.MyView_textSize, 10);        mProgressColor = array.getColor(R.styleable.MyView_progressColor, currentColor);    }    @Override    protected void onDraw(Canvas canvas) {        animator = ValueAnimator.ofObject(new ArgbEvaluator(), Color.RED, Color.BLUE);        animator.setDuration(500);        animator.setRepeatCount(ValueAnimator.INFINITE);        animator.setRepeatMode(ValueAnimator.REVERSE);        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator valueAnimator) {                currentColor = (int) valueAnimator.getAnimatedValue();            }        });        paint.setStrokeWidth(0);        paint.setColor(Color.BLACK);        paint.setStyle(Paint.Style.STROKE);        canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, mRadiuSize, paint);        canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, mRadiuSize - mRingSize, paint);        paint.setTextSize(mTextSize);        String text = mCountProgress+"";        float textWidth = paint.measureText(text);        canvas.drawText(text, getMeasuredWidth() / 2 - textWidth / 2, getMeasuredWidth() / 2 + mTextSize / 2, paint);        RectF rectF = new RectF(getMeasuredWidth() / 2 - mRadiuSize + mRingSize / 2, getMeasuredHeight() / 2 - mRadiuSize + mRingSize / 2, getMeasuredWidth() / 2 + mRadiuSize - mRingSize / 2, getMeasuredHeight() / 2 + mRadiuSize - mRingSize / 2);        paint.setStrokeWidth(mRingSize);        paint.setColor(currentColor);        canvas.drawArc(rectF, 0, mProgress*90, false, paint);    }    public void setProgress(int progress) {        if (flag) {            animator.start();            flag = false;        }        mProgress = (4-progress);        mCountProgress = (4-progress) ;        invalidate();    }}
attrs.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="MyView">        <attr name="progressColor" format="color"/>        <attr name="textSize" format="dimension"/>        <attr name="ringSize" format="dimension"/>        <attr name="radiuSize" format="dimension"/>    </declare-styleable></resources>
//清单文件

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.tuhua">    <uses-permission android:name="android.permission.INTERNET"/>    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".WelcomeActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".MainActivity"></activity>    </application></manifest>