1、簡介

　　ProgressBar繼承與View類，直接子類有AbsSeekBar和ContentLoadingProgressBar， 其中AbsSeekBar的子類有SeekBar和RatingBar！

android:max：進度條的最大值 android:progress：進度條已完成進度值 android:progressDrawable：設置軌道對應的Drawable對象 android:indeterminate：如果設置成true，則進度條不精確顯示進度 android:indeterminateDrawable：設置不顯示進度的進度條的Drawable對象 android:indeterminateDuration：設置不精確顯示進度的持續時間 android:secondaryProgress：二級進度條

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2、簡單使用

　　頭兩個是系統自帶，后面一個幀動畫一個自定義View！

　　xml布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center"android:orientation="vertical"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context=".LoginActivity"><ProgressBarandroid:layout_width="wrap_content"android:layout_height="wrap_content"style="@android:style/Widget.ProgressBar.Large"/><ProgressBarandroid:layout_width="match_parent"android:layout_height="wrap_content"android:max="100"android:progress="10"android:secondaryProgress="20"style="@android:style/Widget.ProgressBar.Horizontal"/><ImageViewandroid:id="@+id/imageview11"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/amin_pgbar"/><com.example.xianfengzhang.myapplication.CustomView.CirclePgBarandroid:layout_width="wrap_content"android:layout_height="wrap_content" /> </LinearLayout>

　　幀動畫布局文件：

<?xml version="1.0" encoding="utf-8"?> <animation-list xmlns:android="http://schemas.android.com/apk/res/android"android:oneshot="false" ><itemandroid:drawable="@drawable/loading_01"android:duration="200"/><itemandroid:drawable="@drawable/loading_02"android:duration="200"/><itemandroid:drawable="@drawable/loading_03"android:duration="200"/><itemandroid:drawable="@drawable/loading_04"android:duration="200"/><itemandroid:drawable="@drawable/loading_05"android:duration="200"/><itemandroid:drawable="@drawable/loading_06"android:duration="200"/><itemandroid:drawable="@drawable/loading_07"android:duration="200"/><itemandroid:drawable="@drawable/loading_08"android:duration="200"/><itemandroid:drawable="@drawable/loading_09"android:duration="200"/><itemandroid:drawable="@drawable/loading_10"android:duration="200"/><itemandroid:drawable="@drawable/loading_11"android:duration="200"/><itemandroid:drawable="@drawable/loading_12"android:duration="200"/> </animation-list>

　　幀動畫Java文件：

public class LoginActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_login);// Set up the login form. ImageView imageView = (ImageView)findViewById(R.id.imageview11);final AnimationDrawable animationDrawable = (AnimationDrawable)imageView.getDrawable();imageView.postDelayed(new Runnable() {@Overridepublic void run() {animationDrawable.start();}},100);} }

　　自定義View：

package com.example.xianfengzhang.myapplication.CustomView;import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.util.AttributeSet; import android.view.View;/*** Created by xianfengzhang on 2017/12/22.*/@SuppressLint("ViewConstructor") public class CirclePgBar extends View {private Paint mBackPaint;private Paint mFrontPaint;private Paint mTextPaint;private float mStrokeWidth = 50;private float mHalfStrokeWidth = mStrokeWidth / 2;private float mRadius = 200;private RectF mRect;private int mProgress = 0;//目標值，想改多少就改多少private int mTargetProgress = 90;private int mMax = 100;private int mWidth;private int mHeight;// 構造方法public CirclePgBar(Context context) {super(context);init();}public CirclePgBar(Context context, AttributeSet attrs) {super(context, attrs);init();}public CirclePgBar(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init();}private void init(){mBackPaint = new Paint();mBackPaint.setColor(Color.WHITE);//設置畫筆顏色mBackPaint.setAntiAlias(true);//設置畫筆鋸齒效果mBackPaint.setStyle(Paint.Style.STROKE);//設置畫筆風格（空心|實心）mBackPaint.setStrokeWidth(mStrokeWidth);//設置空心邊框的寬度 mFrontPaint = new Paint();mFrontPaint.setColor(Color.GREEN);mFrontPaint.setAntiAlias(true);mFrontPaint.setStyle(Paint.Style.STROKE);mFrontPaint.setStrokeWidth(mStrokeWidth);mTextPaint = new Paint();mTextPaint.setColor(Color.GREEN);//設置字體顏色mTextPaint.setAntiAlias(true);mTextPaint.setTextSize(80);//設置字體大小mTextPaint.setTextAlign(Paint.Align.CENTER);//設置字體對齊方式 }//onMeasure（測量控件大小的方法） 重寫onMeasure方法 @Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){super.onMeasure(widthMeasureSpec, heightMeasureSpec);mWidth = getRealSize(widthMeasureSpec);mHeight = getRealSize(heightMeasureSpec);setMeasuredDimension(mWidth,mHeight);//保存測量的大小 } //onDraw繪制View自身的內容 重寫onDraw方法 @Overrideprotected void onDraw(Canvas canvas){initRect();float angle = mProgress/(float)mMax *360;canvas.drawCircle(mWidth/2,mHeight/2,mRadius,mBackPaint);canvas.drawArc(mRect,-90,angle,false,mFrontPaint);canvas.drawText(mProgress + "%",mWidth/2+mHalfStrokeWidth,mHeight/2+mHalfStrokeWidth,mTextPaint);if (mProgress < mTargetProgress){mProgress +=1;invalidate();}}public int getRealSize(int measureSpec) {int result = 1;int mode = MeasureSpec.getMode(measureSpec);//從提供的測量規范中獲取模式int size = MeasureSpec.getSize(measureSpec);//從提供的測量規范中獲取尺寸 //MeasureSpec其實就是尺寸和模式通過各種位運算計算出的一個整型值，它提供了三種模式，還有三個方法（合成約束、分離模式、分離尺寸） //UNSPECIFIED(未指定)：父控件沒有對子控件施加任何約束，子控件可以得到任意想要的大小！ //EXACTLY(完全)：父控件給子控件決定了確切大小，子控件將被限定在給定的邊界里而忽略它本身大小。 //AT_MOST(至多)：子控件至多達到指定大小的值。if (mode == MeasureSpec.AT_MOST || mode == MeasureSpec.UNSPECIFIED) {result = (int) (mRadius * 2 + mStrokeWidth);} else {result = size;}return result;}private void initRect() {if (mRect == null) {mRect = new RectF();int viewSize = (int) (mRadius * 2);int left = (mWidth - viewSize) / 2;int top = (mHeight - viewSize) / 2;int right = left + viewSize;int bottom = top + viewSize;mRect.set(left, top, right, bottom);}} }

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轉載于:https://www.cnblogs.com/xianfeng-zhang/p/8085673.html

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