Android自定义Progress控件的方法

progress各种各样的都有，自定义大多数也是简单的，根据业务需求来自己定义，记录一下，先上效果图

本来想找个第三方改改就上的，不过自己的业务需求有点不搭，一下子没找到合适的，也没这么多时间去找了，想想还是自己写个吧，因为也简单。

主要就是需求就是椭圆进度，百分比跟随渐变背景，这样一想其实就是一个布局，然后控制里面的进度长度，或者移动，我这是控制长度，这样毕竟简单，而且扩展好，以后进度条有什么奇葩需求也好改。

import android.content.context;
import android.content.res.typedarray;
import android.graphics.color;
import android.support.annotation.attrres;
import android.support.annotation.nonnull;
import android.support.annotation.nullable;
import android.util.attributeset;
import android.view.gravity;
import android.view.view;
import android.view.viewgroup;
import android.widget.framelayout;
import android.widget.textview;

/**
 * created by liuzhen on 2017/7/8.
 */

public class updateprogressbar extends framelayout {

  private textview tv_progress;
  private int width;
  private viewgroup.layoutparams params;
  /**
   * the progress text offset.
   */
  private int moffset;
  /**
   * the progress text size.
   */
  private float mtextsize;
  /**
   * the progress text color.
   */
  private int mtextcolor;
  private float default_text_size;
  /**
   * the progress area bar color.
   */
  private int mreachedbarcolor;
  /**
   * the bar unreached area color.
   */
  private int munreachedbarcolor;
  private final int default_reached_color = color.rgb(66, 145, 241);
  private final int default_unreached_color = color.rgb(204, 204, 204);
  private final int default_text_color = color.rgb(66, 145, 241);

  public updateprogressbar(@nonnull context context) {
    this(context,null);
  }

  public updateprogressbar(@nonnull context context, @nullable attributeset attrs) {
    this(context, attrs,0);
  }

  public updateprogressbar(@nonnull context context, @nullable attributeset attrs, @attrres int defstyleattr) {
    super(context, attrs, defstyleattr);
    init(attrs, defstyleattr);
  }

  @override
  protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {

    int desiredwidth = 100;
    int desiredheight = 100;

    int widthmode = measurespec.getmode(widthmeasurespec);
    int widthsize = measurespec.getsize(widthmeasurespec);
    int heightmode = measurespec.getmode(heightmeasurespec);
    int heightsize = measurespec.getsize(heightmeasurespec);

    int height;

    //measure width
    if (widthmode == measurespec.exactly) {
      //must be this size
      width = widthsize;
    } else if (widthmode == measurespec.at_most) {
      //can't be bigger than...
      width = math.min(desiredwidth, widthsize);
    } else {
      //be whatever you want
      width = desiredwidth;
    }

    //measure height
    if (heightmode == measurespec.exactly) {
      //must be this size
      height = heightsize;
    } else if (heightmode == measurespec.at_most) {
      //can't be bigger than...
      height = math.min(desiredheight, heightsize);
    } else {
      //be whatever you want
      height = desiredheight;
    }

    int childcount = getchildcount();
    for (int i = 0; i < childcount; i++) {
      view child = getchildat(i);
      viewgroup.layoutparams lp = child.getlayoutparams();
      int childwidthspec = getchildmeasurespec(widthmeasurespec, 0, lp.width);
      int childheightspec = getchildmeasurespec(heightmeasurespec, 0, lp.height);
      child.measure(childwidthspec, childheightspec);
    }
    params = tv_progress.getlayoutparams();
    params.width = viewgroup.layoutparams.wrap_content;
    params.height = viewgroup.layoutparams.match_parent;
    tv_progress.setlayoutparams(params);
    height = tv_progress.getmeasuredheight();
    //must call this
    setmeasureddimension(width, height);
  }


  private void init(attributeset attrs, int defstyleattr){

    default_text_size = 8;
    //load styled attributes.
    final typedarray attributes = getcontext().gettheme().obtainstyledattributes(attrs, r.styleable.updateprogressbar,
        defstyleattr, 0);

    mtextsize = attributes.getdimension(r.styleable.updateprogressbar_update_text_size, default_text_size);
    mreachedbarcolor = attributes.getresourceid(r.styleable.updateprogressbar_update_reached_color, default_reached_color);
    munreachedbarcolor = attributes.getresourceid(r.styleable.updateprogressbar_update_unreached_color, default_unreached_color);
    mtextcolor = attributes.getcolor(r.styleable.updateprogressbar_update_text_color, default_text_color);

    setdefaultprogressbar();

    moffset = px2dip(3);

    attributes.recycle();
  }

  private void setdefaultprogressbar(){
    setbackgroundresource(munreachedbarcolor);
    tv_progress = new textview(getcontext());
    tv_progress.settextsize(mtextsize);
    tv_progress.setgravity(gravity.right | gravity.center_vertical);
    tv_progress.settextcolor(mtextcolor);
    tv_progress.setlines(1);
    tv_progress.setbackgroundresource(mreachedbarcolor);
    tv_progress.setpadding(0,0,5,1);
    tv_progress.settext("0%");
    addview(tv_progress);
  }

  public void setprogress(int progress){
    tv_progress.settext(progress+"%");
    int prowidth = width*progress/100;
    if (tv_progress.getwidth() < prowidth)
      params.width = prowidth;//这里不能填充moffset，因为是椭圆进度条，填充会导致椭圆宽度被进度条覆盖，导致不美观
    tv_progress.setlayoutparams(params);
  }

  /**
   * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
   */
  public int dip2px(context context, float dpvalue) {
    final float scale = context.getresources().getdisplaymetrics().density;
    return (int) (dpvalue * scale + 0.5f);
  }

  /**
   * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
   */
  public int px2dip(float pxvalue) {
    final float scale = getcontext().getresources().getdisplaymetrics().density;
    return (int) (pxvalue / scale + 0.5f);
  }

  /**
   * 将px值转换为sp值，保证文字大小不变
   */
  public int px2sp(float pxvalue) {
    final float fontscale = getcontext().getresources().getdisplaymetrics().scaleddensity;
    return (int) (pxvalue / fontscale + 0.5f);
  }

  /**
   * 将sp值转换为px值，保证文字大小不变
   */
  public int sp2px(float spvalue) {
    final float fontscale = getcontext().getresources().getdisplaymetrics().scaleddensity;
    return (int) (spvalue * fontscale + 0.5f);
  }

}

用法布局文件

<com.progressbar.example.updateprogressbar
    xmlns:pro="http://schemas.android.com/apk/res-auto"
    android:id="@+id/progress"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    pro:update_text_size="6sp"
    pro:update_text_color="#ffffff"
    pro:update_unreached_color="@drawable/shape_corner_progressbg"
    pro:update_reached_color="@drawable/shape_corner_progressbar"/>

mainactivity

import android.os.bundle;
import android.support.v7.app.actionbaractivity;
import android.support.v7.app.appcompatactivity;
import android.view.menu;
import android.view.menuitem;
import android.widget.toast;

import com.progressbar.numberprogressbar;

import java.util.timer;
import java.util.timertask;


public class mainactivity extends appcompatactivity {
  private timer timer;
  private updateprogressbar progressbar;
  private int progress;

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    progressbar = (updateprogressbar)findviewbyid(r.id.progress);

    timer = new timer();
    timer.schedule(new timertask() {
      @override
      public void run() {
        runonuithread(new runnable() {
          @override
          public void run() {
            progress++;
            progressbar.setprogress(progress);
            if(progress == 100) {
              toast.maketext(getapplicationcontext(), getstring(r.string.finish), toast.length_short).show();
//              progress = 0;
//              progressbar.setprogress(0);
              timer.cancel();
            }
          }
        });
      }
    }, 1000, 100);
  }

  @override
  public boolean oncreateoptionsmenu(menu menu) {
    // inflate the menu; this adds items to the action bar if it is present.
    getmenuinflater().inflate(r.menu.main, menu);
    return true;
  }

  @override
  public boolean onoptionsitemselected(menuitem item) {
    // handle action bar item clicks here. the action bar will
    // automatically handle clicks on the home/up button, so long
    // as you specify a parent activity in androidmanifest.xml.
    int id = item.getitemid();
    if (id == r.id.action_settings) {
      return true;
    }
    return super.onoptionsitemselected(item);
  }

  @override
  protected void ondestroy() {
    super.ondestroy();
    timer.cancel();
  }
}

渐变背景

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

  <solid android:color="#4984f2"/>

  <gradient
    android:startcolor="#4984f2"
    android:endcolor="#000" />

  <corners
    android:topleftradius="15dp"
    android:toprightradius="15dp"
    android:bottomleftradius="15dp"
    android:bottomrightradius="15dp"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

  <solid android:color="#dadada"/>

  <gradient
  android:startcolor="#fff"
  android:endcolor="#000" />


  <corners
    android:topleftradius="15dp"
    android:toprightradius="15dp"
    android:bottomleftradius="15dp"
    android:bottomrightradius="15dp"/>
</shape>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。