简单仿写网易加载进度条

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.safly.myapplication.MainActivity"> <com.safly.myapplication.CustomeWaitingProgressBar android:layout_centerInParent="true" android:id="@+id/skipView2" android:layout_width="wrap_content" android:layout_height="wrap_content"> </com.safly.myapplication.CustomeWaitingProgressBar> </RelativeLayout>

MainActivity

package com.safly.myapplication; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Toast; import com.safly.myapplication.CustomeWaitingProgressBar; public class MainActivity extends AppCompatActivity { private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case 2: pbBar.setWaitingProgress(); break; } } }; CustomeWaitingProgressBar pbBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); pbBar = (CustomeWaitingProgressBar) findViewById(R.id.skipView2); new Thread(new Runnable() { @Override public void run() { try { for (int i = 0; i < 100; i++) { Log.i("MainActivity","----------------"); handler.sendEmptyMessage(2); Thread.sleep(100); } } catch (InterruptedException e) { e.printStackTrace(); } } }).start(); pbBar.setDegreeCallBack(new CustomeWaitingProgressBar.DegreeCallBack() { @Override public void degreeFinish(int cur) { Toast.makeText(MainActivity.this,"cur--"+cur,Toast.LENGTH_SHORT).show(); } }); pbBar.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,"setOnClickListener",Toast.LENGTH_SHORT).show(); } }); } }

CustomeWaitingProgressBar

package com.safly.myapplication; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.RectF; import android.util.AttributeSet; import android.view.View; public class CustomeWaitingProgressBar extends View { private Paint mForePaint; private float mStrokeWidth; private float mRadius; private RectF mRect; private int mWidth; private int mHeight; private int currentDegree; public CustomeWaitingProgressBar(Context context) { super(context); init(); } public CustomeWaitingProgressBar(Context context, AttributeSet attrs) { super(context, attrs); init(); } public CustomeWaitingProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } private void init(){ mRadius = DisplayUtil.dip2px(getContext(),20); mStrokeWidth = DisplayUtil.dip2px(getContext(),2); if(mForePaint == null){ mForePaint=new Paint(); mForePaint.setColor(Color.parseColor("#FF0000")); mForePaint.setAntiAlias(true); mForePaint.setStyle(Paint.Style.STROKE); mForePaint.setStrokeWidth(mStrokeWidth); } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); mWidth=getRealSize(widthMeasureSpec); mHeight=getRealSize(heightMeasureSpec); setMeasuredDimension(mWidth,mHeight); } public int getRealSize(int measureSpec){ int result=-1; int mode=MeasureSpec.getMode(measureSpec); int size=MeasureSpec.getSize(measureSpec); if (mode==MeasureSpec.AT_MOST||mode==MeasureSpec.UNSPECIFIED){ //(半径*2+描边*2)的长度 result=(int) (mRadius*2+2*mStrokeWidth); }else{ result=size; } return result; } /** * 初始化yuanx的外轮廓矩形 */ public void initRect(){ if (mRect==null){ mRect=new RectF(); int left=(int) mStrokeWidth/2; int top=(int) mStrokeWidth/2; int right=mWidth-left; int bottom=mHeight-top; mRect.set(left,top,right,bottom); } } private int leftLastX = -90; private int sweepGreed = 0; private int perAcceleration = 10; private int perDrawAcceleration = 5; private int drawTime; private int leftLastSweepGreed; @Override protected void onDraw(Canvas canvas) { initRect(); if (sweepGreed - leftLastSweepGreed >= 120){ leftLastX = -90; sweepGreed = -90; drawTime = 0; } canvas.drawArc(mRect,leftLastX,sweepGreed,false,mForePaint); leftLastSweepGreed = perAcceleration*drawTime; leftLastX+=perAcceleration; sweepGreed+=perAcceleration+perDrawAcceleration*drawTime; drawTime++; if (currentDegree == 360){ if (callBack!=null){ callBack.degreeFinish(currentDegree); } } } DegreeCallBack callBack; public void setDegreeCallBack(DegreeCallBack callBack){ this.callBack = callBack; } interface DegreeCallBack{ void degreeFinish(int cur); } public void setWaitingProgress(){ invalidate(); } }