Android自定义带水滴的进度条样式（带渐变色效果）

一、直接看效果

二、直接上代码

1.自定义控件部分

package com.susan.project.myapplication;
import android.app.activity;
import android.content.context;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.lineargradient;
import android.graphics.paint;
import android.graphics.rectf;
import android.graphics.shader;
import android.util.attributeset;
import android.util.displaymetrics;
import android.util.log;
import android.view.view;
/**
* @author dahai
* @classname: ${type_name}
* @description: ${todo}
* @date ${date} ${time}
* @email [e-mail]
* @since $android
渐变
进度条

*/
public class progressseek extends view {
/**
* 进度条的宽度
*/
private int view_width;
/**
* 画布的宽度
*/
private int view_base_width;
/**
* 控件的宽度
*/
private int view_edge_width;
/**
* 进度
*/
private int progress;
private canvas cachecanvas;
/**
* 背景颜色的画笔
*/
private paint backgroundpaint;
/**
* 进度条的画笔
*/
private paint progresspaint;
/**
* 进度末端的图
*/
private bitmap bitmap;
private int bitmapwidth;
private int bitmapheight;
private context context;
//渐变色开始
private static final int default_start_color = color.parsecolor("#34dab5");
//渐变色结束
private static final int default_end_color = color.parsecolor("#27a5fe");
/**
* 缓存图片
*/
private bitmap cachebitmap;
public progressseek(context context) {
super(context);
initview(context);
}
public progressseek(context context, attributeset attrs) {
super(context, attrs);
initview(context);
}
public progressseek(context context, attributeset attrs, int defstyleattr) {
super(context, attrs, defstyleattr);
initview(context);
}
private void initview(context context) {
this.context = context;
bitmap = bitmapfactory.decoderesource(context.getresources(), r.mipmap.thumb);
bitmapwidth = bitmap.getwidth();
bitmapheight = bitmap.getheight();
backgroundpaint = new paint();
backgroundpaint.setstrokewidth(bitmapwidth);
backgroundpaint.setcolor(color.parsecolor("#cccccc"));
backgroundpaint.setdither(true);
backgroundpaint.setantialias(true);
progresspaint = new paint();
progresspaint.setstrokewidth(bitmapwidth);
progresspaint.setdither(true);
progresspaint.setantialias(true);
displaymetrics d = new displaymetrics();
((activity) context).getwindowmanager().getdefaultdisplay().getmetrics(d);
view_base_width = d.widthpixels;
}
public void init(int progress) {
this.progress = progress;
if (view_width == 0) {//第一上来
/* displaymetrics d = new displaymetrics();
((activity) context).getwindowmanager().getdefaultdisplay().getmetrics(d);
view_width = d.widthpixels*progress/100;*/
view_width = view_base_width * progress / 100;
} else {
view_width = view_edge_width * progress / 100;
}
if (cachebitmap != null) {
if (!cachebitmap.isrecycled()) {
cachebitmap.recycle();
cachebitmap = null;
}
cachecanvas = null;
}
cachebitmap = bitmap.createbitmap(view_base_width, bitmapheight * 2, bitmap.config.argb_8888);
if (cachecanvas == null) {
cachecanvas = new canvas();
cachecanvas.setbitmap(cachebitmap);
}
/**
* 画背景
*/
rectf r = new rectf();
r.left = 0;
r.top = bitmapheight;
r.right = view_base_width;
r.bottom = bitmapwidth + 10;
cachecanvas.drawroundrect(r, 5f, 5f, backgroundpaint);
if (progress > 0) {
lineargradient lg = new lineargradient(0, 0, view_width, bitmapwidth, default_start_color, default_end_color, shader.tilemode.clamp);
progresspaint.setshader(lg);
rectf r1 = new rectf();
r.left = 0;
r.top = bitmapheight;
r.right = view_width;
r.bottom = bitmapwidth + 10;
cachecanvas.drawroundrect(r, 5f, 5f, progresspaint);
cachecanvas.drawbitmap(bitmap, view_width - bitmapwidth+8, bitmapheight / 2 + 6, new paint());
}
invalidate();
}
@override
protected void ondraw(canvas canvas) {
super.ondraw(canvas);
paint bmppaint = new paint();
//将cachebitmap绘制到该view组件
if (cachebitmap != null) {
canvas.drawbitmap(cachebitmap, 0, 0, bmppaint);
}
view_edge_width = this.getwidth();
log.e("打出来看看控件的宽度:", view_edge_width + "");
init(progress);
}
}

3. 布局文件部分

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.susan.project.myapplication.progressseek
android:id="@+id/progress"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.progressseek>
<com.susan.project.myapplication.progressseek
android:id="@+id/progress1"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.progressseek>
<com.susan.project.myapplication.progressseek
android:id="@+id/progress2"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.progressseek>
<com.susan.project.myapplication.progressseek
android:id="@+id/progress3"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.progressseek>
</linearlayout>

4.activity部分

package com.susan.project.myapplication;
import android.app.activity;
import android.os.bundle;
public class mainactivity extends activity {
private progressseek progress;
private progressseek progress1;
private progressseek progress2;
private progressseek progress3;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
progress = (progressseek) findviewbyid(r.id.progress);
progress.init(0);
progress1 = (progressseek) findviewbyid(r.id.progress1);
progress1.init(2);
progress2 = (progressseek) findviewbyid(r.id.progress2);
progress2.init(50);
progress3 = (progressseek) findviewbyid(r.id.progress3);
progress3.init(100);
}
}

以上所述是小编给大家介绍的android自定义带水滴的进度条样式（带渐变色效果），希望对大家有所帮助