标签：
自定义进度条实现大体流程
1、自定义属性声明（attrs文件）
2、自定义属性获取
3、测量（onMeasure）
4、绘制（onDraw）
代码：
attrs文件：
<!-- 自定义声明 -->
<attr name="progress_unreach_color" format="color"></attr>
<attr name="progress_unreach_height" format="dimension"></attr>
<attr name="progress_reach_color" format="color"></attr>
<attr name="progress_reach_height" format="dimension"></attr>
<attr name="progress_text_color" format="color"></attr>
<attr name="progress_text_size" format="dimension"></attr>
<attr name="progress_text_offset" format="dimension"></attr>
<!-- 自定义使用 -->
<declare-styleable name="ProgressbarView">
<attr name="progress_unreach_color"></attr>
<attr name="progress_unreach_height"></attr>
<attr name="progress_reach_color"></attr>
<attr name="progress_reach_height"></attr>
<attr name="progress_text_color"></attr>
<attr name="progress_text_size"></attr>
<attr name="progress_text_offset"></attr>
</declare-styleable>
布局文件：
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:hyman="http://schemas.android.com/apk/res/com.Horizontal.horizontalprogressbar"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<com.Horizontal.view.ProgressbarView
android:id="@+id/progress01"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dip"
hyman:progress_reach_color="#f00"
hyman:progress_text_color="#f00"
hyman:progress_unreach_color="#000"
android:background="#d1d3d7"
android:padding="10dip"
android:progress="0" />
<com.Horizontal.view.RoundProgressbar
android:id="@+id/progress02"
android:layout_width="match_parent"
android:layout_height="wrap_content"
hyman:progress_reach_color="#f3d4e3"
hyman:progress_text_color="#f00"
hyman:progress_unreach_color="#000"
android:layout_marginTop="30dp"
hyman:rudio="80dp"
android:padding="10dip"
android:progress="0"
/>
</LinearLayout>
</ScrollView>
ProgressbarView文件：
package com.Horizontal.view;
import com.Horizontal.horizontalprogressbar.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.ProgressBar;
public class ProgressbarView extends ProgressBar {
private static final int DEFAULT_TEXT_SIZE = 10;// 字体大小 sp
private static final int DEFAULT_TEXT_COLOR = 0xFC00D1;
private static final int DEFAULT_REACH_HEIGHT = 3;// 左进度条高度 dp
private static final int DEFAULT_REACH_COLOR = DEFAULT_TEXT_COLOR;
private static final int DEFAULT_UNREACH_HEIGHT = 2;// 右进度条高度 dp
private static final int DEFAULT_UNREACH_COLOR = 0xD3D6D1;
private static final int DEFAULT_TEXT_OFFSET = 10;// 做进度条与文字的距离 dp
protected int mTextSize = sp2px(DEFAULT_TEXT_SIZE);
protected int mTextColor = DEFAULT_TEXT_COLOR;
protected int mReachHeight = dp2px(DEFAULT_REACH_HEIGHT);
protected int mReachColor = DEFAULT_REACH_COLOR;
protected int mUnReachHeight = dp2px(DEFAULT_UNREACH_HEIGHT);
protected int mUnReachColor = DEFAULT_UNREACH_COLOR;
protected int mTextOffset = dp2px(DEFAULT_TEXT_OFFSET);
protected Paint mPaint = new Paint();
// 控件的宽度
private int mRealWidth;
public ProgressbarView(Context context) {
this(context, null);
}
public ProgressbarView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ProgressbarView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
obtainStyledAttrs(attrs);
}
/** 获取自定义属性 **/
private void obtainStyledAttrs(AttributeSet attrs) {
// 获取attr文件中的styleable(ProgressbarView)
TypedArray ta = getContext().obtainStyledAttributes(attrs,
R.styleable.ProgressbarView);
// 获取自定义属性和默认值
mTextSize = (int) ta.getDimension(
R.styleable.ProgressbarView_progress_text_size, mTextSize);
mTextColor = ta.getColor(
R.styleable.ProgressbarView_progress_text_color, mTextColor);
mReachHeight = (int) ta
.getDimension(
R.styleable.ProgressbarView_progress_reach_height,
mReachHeight);
mReachColor = ta.getColor(
R.styleable.ProgressbarView_progress_reach_color, mReachColor);
mUnReachHeight = (int) ta.getDimension(
R.styleable.ProgressbarView_progress_unreach_height,
mUnReachHeight);
mUnReachColor = ta.getColor(
R.styleable.ProgressbarView_progress_unreach_color,
mUnReachColor);
mTextOffset = (int) ta.getDimension(
R.styleable.ProgressbarView_progress_text_offset, mTextOffset);
ta.recycle();
mPaint.setTextSize(mTextSize);
}
/** 宽度和高度的测量 **/
@Override
protected synchronized void onMeasure(int widthMeasureSpec,
int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// 拿宽度的模式
// int widthMode = MeasureSpec.getMode(widthMeasureSpec);
// 宽度的值（横向精度条要给明确值，所以不需要判断）
int widthVal = MeasureSpec.getSize(widthMeasureSpec);
int heigth = MeasureSpecHeigth(heightMeasureSpec);
setMeasuredDimension(widthVal, heigth);
// 实际绘画的宽度
mRealWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
}
/** 高度测量 **/
private int MeasureSpecHeigth(int heightMeasureSpec) {
int result = 0;
int mode = MeasureSpec.getMode(heightMeasureSpec);
int size = MeasureSpec.getSize(heightMeasureSpec);
// EXACTLY 父结点要求其子节点的大小指定为某个确切的值。其子节点以及其他子孙结点都需要适应该大小。
if (mode == MeasureSpec.EXACTLY) {
result = size;
} else {
int textHeigth = (int) (mPaint.descent() - mPaint.ascent());
result = getPaddingTop()
+ getPaddingBottom()
+ Math.max(Math.max(mReachHeight, mUnReachHeight),
Math.abs(textHeigth));
// AT_MOST 父结点要求其子节点的大小不能超过某个最大值，其子节点以及其他子孙结点的大小都需要小于这个值
if (mode == MeasureSpec.AT_MOST) {
result = Math.min(result, size);
}
}
return result;
}
/** 画控件 **/
@Override
protected synchronized void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.save();
// 抗锯齿
canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG
| Paint.FILTER_BITMAP_FLAG));
// 设置画布的原点
canvas.translate(getPaddingLeft(), getHeight() / 2);
// /draw reach
boolean noNeedUnreach = false;
String text = getProgress() + "%";
int textWidth = (int) mPaint.measureText(text);
float radio = getProgress() * 1.0f / getMax();
float progressX = radio * mRealWidth;
if (textWidth + progressX > mRealWidth) {
progressX = mRealWidth - textWidth;
noNeedUnreach = true;
}
float endX = progressX - mTextOffset / 2;
if (endX > 0) {
mPaint.setColor(mReachColor);
mPaint.setStrokeWidth(mReachHeight);
canvas.drawLine(0, 0, endX, 0, mPaint);
}
// draw text
mPaint.setColor(mTextColor);
int y = (int) (-(mPaint.descent() + mPaint.ascent()) / 2);
canvas.drawText(text, progressX, y, mPaint);
// draw unreach bar
if (!noNeedUnreach) {
float start = progressX + mTextOffset / 2 + textWidth;
mPaint.setColor(mUnReachColor);
mPaint.setStrokeWidth(mUnReachHeight);
canvas.drawLine(start, 0, mRealWidth, 0, mPaint);
}
canvas.restore();
}
/** dp转px **/
protected int dp2px(int dpVal) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
dpVal, getResources().getDisplayMetrics());
}
/** sp转px **/
protected int sp2px(int spVal) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
spVal, getResources().getDisplayMetrics());
}
}
MainActivity：
package com.Horizontal.horizontalprogressbar;
import com.Horizontal.view.ProgressbarView;
import com.Horizontal.view.RoundProgressbar;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
private ProgressbarView progressbarView;
// private RoundProgressbar roundProgressbar;
private static final int MSG_UPDATE = 0X110;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressbarView = (ProgressbarView) findViewById(R.id.progress01);
// roundProgressbar=(RoundProgressbar) findViewById(R.id.progress02);
handler.sendEmptyMessage(MSG_UPDATE);
}
private Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
int progress = progressbarView.getProgress();
// roundProgressbar.setProgress(++progress);
progressbarView.setProgress(++progress);
if (progress >= 100) {
handler.removeMessages(MSG_UPDATE);
}
handler.sendEmptyMessageDelayed(MSG_UPDATE, 100);
};
};
}
源码下载：链接: http://pan.baidu.com/s/1hrByCV6 密码: whs7
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原文地址：http://www.cnblogs.com/Jason-123/p/5704286.html
