Android原生控件只有横向进度条一种,而且没法变换样式,比如原生rom的样子
很丑是吧,当伟大的产品设计要求更换前背景,甚至纵向,甚至圆弧状的,咋办,比如ok,我们开始吧: 一)变换前背景先来看看progressbar的属性:
1. <ProgressBar2. android:id="@+id/progressBar"3. style="?android:attr/progressBarStyleHorizontal"4. android:layout_width="match_parent"5. android:layout_height="wrap_content"6. android:layout_margin="5dip"7. android:layout_toRightOf="@+id/progressBarV"8. android:indeterminate="false"9. android:padding="2dip"10. android:progress="50" />根据style="?android:attr/progressBarStyleHorizontal",我们找到源码中的style.xml1. <style name="Widget.ProgressBar.Horizontal">2. <item name="android:indeterminateOnly">false</item>3. <item name="android:progressDrawable">@android:drawable/progress_horizontal</item>4. <item name="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>5. <item name="android:minHeight">20dip</item>6. <item name="android:maxHeight">20dip</item>7. </style>看到<item name="android:progressDrawable">@android:drawable/progress_horizontal</item>木有,继续发掘源码,找到drawable下面的progress_horizontal.xml,这就是我们今天的主角了:1. <layer-list xmlns:android="">
2. 3. <item android:id="@android:id/background">4. <shape>5. <corners android:radius="5dip" />6. <gradient7. android:startColor="#ff9d9e9d"8. android:centerColor="#ff5a5d5a"9. android:centerY="0.75"10. android:endColor="#ff747674"11. android:angle="270"12. />13. </shape>14. </item>15. 16. <item android:id="@android:id/secondaryProgress">17. <clip>18. <shape>19. <corners android:radius="5dip" />20. <gradient21. android:startColor="#80ffd300"22. android:centerColor="#80ffb600"23. android:centerY="0.75"24. android:endColor="#a0ffcb00"25. android:angle="270"26. />27. </shape>28. </clip>29. </item>30. 31. <item android:id="@android:id/progress">32. <clip>33. <shape>34. <corners android:radius="5dip" />35. <gradient36. android:startColor="#ffffd300"37. android:centerColor="#ffffb600"38. android:centerY="0.75"39. android:endColor="#ffffcb00"40. android:angle="270"41. />42. </shape>43. </clip>44. </item>45. 46. </layer-list> 看到android:id="@android:id/progress"木有,看到android:id="@android:id/secondaryProgress"木有把这个文件复制到自己工程下的drawable,就可以随心所欲的修改shape的属性,渐变,圆角等等那么怎么放一个图片进去呢,ok,新建progress_horizontal1.xml:1. <?xml version="1.0" encoding="utf-8"?>2. <layer-list xmlns:android="">3. 4. <item android:id="@android:id/progress" android:drawable="@drawable/progressbar" />5. 6. </layer-list>在android:drawable中指定你处理好的图片然后回到布局中1. <ProgressBar2. android:id="@+id/progressBar1"3. android:layout_width="match_parent"4. android:layout_height="wrap_content"5. android:layout_below="@+id/progressBar"6. android:layout_margin="5dip"7. android:layout_toRightOf="@+id/progressBarV"8. android:background="@drawable/progress_bg"9. android:indeterminate="false"10. android:indeterminateOnly="false"11. android:maxHeight="20dip"12. android:minHeight="20dip"13. android:padding="2dip"14. android:progress="50"15. android:progressDrawable="@drawable/progress_horizontal1" />android:background="@drawable/progress_bg"指定背景android:progressDrawable="@drawable/progress_horizontal1"前景使用上面的progress_horizontal1
ok,搞定 注意看,四角还是有圆倒角的,貌似是系统自己加上去的,总之我的图片里面是没有做这个倒角处理的 二)纵向进度条还是得从源码入手,看回progress_horizontal.xml
1. <item android:id="@android:id/progress">2. <clip>3. <shape>4. <corners android:radius="5dip" />5. <gradient6. android:startColor="#ffffd300"7. android:centerColor="#ffffb600"8. android:centerY="0.75"9. android:endColor="#ffffcb00"10. android:angle="270"11. />12. </shape>13. </clip>14. </item>为什么shape外面要包一层clip呢,官方文档解释是clipdrawable是可以自我复制的,来看看定义1. <?xml version="1.0" encoding="utf-8"?>2. <clip3. xmlns:android=""4. android:drawable="@drawable/drawable_resource"5. android:clipOrientation=["horizontal" | "vertical"]6. android:gravity=["top" | "bottom" | "left" | "right" | "center_vertical" |7. "fill_vertical" | "center_horizontal" | "fill_horizontal" |8. "center" | "fill" | "clip_vertical" | "clip_horizontal"] />android:clipOrientation有两个属性,默认为horizontalandroid:gravity有两个属性,默认为left那我们试试改成vertical和bottom会有什么效果,新建一个progress_vertical.xml,把源码progress_horizontal.xml的内容复制过来,这里去掉了secondaryProgress,修改了clip,shape的渐变中心centerY改为centerX1. <item android:id="@android:id/progress">2. <clip3. android:clipOrientation="vertical"4. android:gravity = "bottom">5. <shape>6. <corners android:radius="5dip" />7. <gradient8. android:startColor="#ffffd300"9. android:centerColor="#ffffb600"10. android:centerX="0.75"11. android:endColor="#ffffcb00"12. android:angle="90"13. />14. </shape>15. </clip>16. </item>布局中android:progressDrawable="@drawable/progress_vertical"ok,搞定,就是这么简单:
三)弧形bar这个也许算不上是进度条,用的也不多,最多也就仪表盘用用,不然谁会把进度条整成圆弧的呢。好吧这个可不是改改源码就能搞定的,看代码
1. public class Arcs extends View { 2. private Paint mArcPaint; 3. private Paint mArcBGPaint; 4. 5. private RectF mOval; 6. private float mSweep = 0; 7. private int mSpeedMax = 200;8. private int mThreshold = 100;9. private int mIncSpeedValue = 0;10. private int mCurrentSpeedValue = 0; 11. private float mCenterX; 12. private float mCenterY; 13. private float mSpeedArcWidth; 14. 15. private final float SPEED_VALUE_INC = 2; 16. 17. .......... 18. 19. } 首先是一堆成员变量,两个Paint用来画圆弧一个前景一个背景,一个RectF圆弧就画在上面,然后是一些控制参数比如sweep圆弧扫过的角度,xy坐标等等 1. mArcPaint = new Paint(Paint.ANTI_ALIAS_FLAG);2. mArcPaint.setStyle(Paint.Style.STROKE);3. mArcPaint.setStrokeWidth(mSpeedArcWidth);4. // mPaint.setStrokeCap(Paint.Cap.ROUND);5. mArcPaint.setColor(0xff81ccd6);6. BlurMaskFilter mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.INNER);7. mArcPaint.setMaskFilter(mBlur);8. 9. mArcBGPaint = new Paint(Paint.ANTI_ALIAS_FLAG);10. mArcBGPaint.setStyle(Paint.Style.STROKE);11. mArcBGPaint.setStrokeWidth(mSpeedArcWidth+8);12. mArcBGPaint.setColor(0xff171717);13. 14. BlurMaskFilter mBGBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.INNER);15. mArcBGPaint.setMaskFilter(mBGBlur);设置两个画笔,颜色,宽度,样式等等,BlurMaskFilter笔是边缘模糊效果,有几种,可以自己尝试 1. @Override2. protected void onSizeChanged(int w, int h, int ow, int oh) { 3. super.onSizeChanged(w, h, ow, oh);4. Log.i("onSizeChanged w", w+"");5. Log.i("onSizeChanged h", h+"");6. mCenterX = w * 0.5f; // remember the center of the screen7. mCenterY = h - mSpeedArcWidth;8. mOval = new RectF(mCenterX - mCenterY, mSpeedArcWidth, mCenterX + mCenterY, mCenterY * 2);9. }重写父类View的onSizeChanged,为的是自己根据布局中的大小做居中处理 1. @Override 2. protected void onDraw(Canvas canvas) { 3. drawSpeed(canvas); 4. calcSpeed(); 5. } 6. 7. private void drawSpeed(Canvas canvas) { 8. canvas.drawArc(mOval, 179, 181, false, mArcBGPaint); 9. 10. mSweep = (float) mIncSpeedValue / mSpeedMax * 180; 11. if (mIncSpeedValue > mThreshold) { 12. mArcPaint.setColor(0xFFFF0000); 13. } 14. else { 15. mArcPaint.setColor(0xFF00B0F0); 16. } 17. 18. canvas.drawArc(mOval, 180, mSweep, false, mArcPaint); 19. } 20. 21. private void calcSpeed() { 22. if (mIncSpeedValue < mCurrentSpeedValue) { 23. mIncSpeedValue += SPEED_VALUE_INC; 24. if (mIncSpeedValue > mCurrentSpeedValue) { 25. mIncSpeedValue = mCurrentSpeedValue; 26. } 27. invalidate(); 28. } 29. else if (mIncSpeedValue > mCurrentSpeedValue) { 30. mIncSpeedValue -= SPEED_VALUE_INC; 31. if (mIncSpeedValue < mCurrentSpeedValue) { 32. mIncSpeedValue = mCurrentSpeedValue; 33. } 34. invalidate(); 35. } 36. } 重写onDraw以便重绘canvasdrawSpeed里面通过计算mSweep = (float) mIncSpeedValue / mSpeedMax * 180;然后canvas.drawArc(mOval, 180, mSweep, false, mArcPaint);会根据mSweep的变化,画出相应长度的弧度来根据与阈值的对比,还可以设定不同的 颜色: if (mIncSpeedValue > mThreshold) { mArcPaint.setColor(0xFFFF0000); } else { mArcPaint.setColor(0xFF00B0F0); } calcSpeed通过一个步进来控制增量或减量,以使弧度自然过渡,减少跳跃ok,大功告成