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Android自定义等待对话框

︶ㄣ速达网 メ
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0710

这篇文章主要为大家详细介绍了Android自定义等待对话框的实现方法，感兴趣的小伙伴们可以参考一下

最近，看了好多的app的等待对话框，发现自己的太lower，于是就研究了一番，最后经过苦心努力，实现一个。

  • 自定义一个loadingindicatorview(extends view )类
  • 编写values/attrs.xml，在其中编写styleable和item等标签元素
  • 在布局文件中loadingindicatorview使用自定义的属性（注意namespace）
  • 在loadingindicatorview的构造方法中通过typedarray获取

描述就提供这些，一下是代码的展示，非常的详细。
1、自定义属性的声明文件

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<declare-styleable name="avloadingindicatorview">
    <attr name="indicator">
      <flag name="ballspinfadeloader" value="22"/>
    </attr>
    <attr name="indicator_color" format="color"/>
  </declare-styleable>
 
 
<pre name="code" class="html">

loadingindicatorview.java 

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import android.annotation.targetapi;
import android.content.context;
import android.content.res.typedarray;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.os.build;
import android.support.annotation.intdef;
import android.util.attributeset;
import android.view.view;
 
import com.chni.lidong.androidtestdemo.r;
 
 
/**
 * created by lidongon 2016/1/31
 *
 .ballspinfadeloader,
 *
 */
public class loadingindicatorview extends view {
 
 
  //indicators 指示器
  public static final int ballspinfadeloader=22;
 
  @intdef(flag = true,
      value = {
          ballspinfadeloader,
      })
  public @interface indicator{}
 
  //sizes (with defaults in dp)
  public static final int default_size=45;
 
  //attrs
  int mindicatorid;
  int mindicatorcolor;
 
  paint mpaint;
 
  baseindicatorcontroller mindicatorcontroller;
 
  private boolean mhasanimation;
 
 
  public loadingindicatorview(context context) {
    super(context);
    init(null, 0);
  }
 
  public loadingindicatorview(context context, attributeset attrs) {
    super(context, attrs);
    init(attrs, 0);
  }
 
  public loadingindicatorview(context context, attributeset attrs, int defstyleattr) {
    super(context, attrs, defstyleattr);
    init(attrs, defstyleattr);
  }
 
 
  @targetapi(build.version_codes.lollipop)
  public loadingindicatorview(context context, attributeset attrs, int defstyleattr, int defstyleres) {
    super(context, attrs, defstyleattr, defstyleres);
    init(attrs, defstyleattr);
  }
 
  private void init(attributeset attrs, int defstyle) {
    /**
     *获取typedarray(属性的集合)
     */
    typedarray a = getcontext().obtainstyledattributes(attrs, r.styleable.avloadingindicatorview);
    mindicatorid=a.getint(r.styleable.avloadingindicatorview_indicator, ballspinfadeloader);//获取编号属性
    mindicatorcolor=a.getcolor(r.styleable.avloadingindicatorview_indicator_color, color.white);//获取颜色属性
    a.recycle();//回收属性的集合
    mpaint=new paint();
    mpaint.setcolor(mindicatorcolor);//设置画笔的颜色
    mpaint.setstyle(paint.style.fill);//设置画笔的样式为填充
    mpaint.setantialias(true);//去锯齿
    applyindicator();//
  }
 
  private void applyindicator(){
    switch (mindicatorid){
      case ballspinfadeloader:
        mindicatorcontroller=new ballspinfadeloaderindicator();
        break;
    }
    mindicatorcontroller.settarget(this);//将控件设置到当前view
  }
 
  @override
  protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
    int width = measuredimension(dp2px(default_size), widthmeasurespec);//获取view的宽度
    int height = measuredimension(dp2px(default_size), heightmeasurespec);//获取view的高度
    setmeasureddimension(width, height);//
  }
 
  /**
   *测量的 维度
   * @param defaultsize 默认大小
   * @param measurespec {@see widthmeasurespec,heightmeasurespec}
   * @return 返回测量的结果
   */
  private int measuredimension(int defaultsize,int measurespec){
    int result = defaultsize;
    int specmode = measurespec.getmode(measurespec);//测量规范
    int specsize = measurespec.getsize(measurespec);//测量大小
    if (specmode == measurespec.exactly) {//父控件已经为子控件设置确定的大小，子控件会考虑父控件给他的大小，自己需要多大设置多大
      result = specsize;
    } else if (specmode == measurespec.at_most) {//子控件可以设置自己希望的指定大小
      result = math.min(defaultsize, specsize);//取最小值
    } else {
      result = defaultsize;
    }
    return result;
  }
 
  @override
  protected void ondraw(canvas canvas) {
    super.ondraw(canvas);
    drawindicator(canvas);
  }
 
  @override
  protected void onlayout(boolean changed, int left, int top, int right, int bottom) {
    super.onlayout(changed, left, top, right, bottom);
    if (!mhasanimation){
      mhasanimation=true;
      applyanimation();
    }
  }
 
  void drawindicator(canvas canvas){
    mindicatorcontroller.draw(canvas,mpaint);
  }
 
  void applyanimation(){
    mindicatorcontroller.createanimation();
  }
 
  private int dp2px(int dpvalue) {
    return (int) getcontext().getresources().getdisplaymetrics().density * dpvalue;
  }

baseindicatorcontroller.java

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package com.chni.lidong.androidtestdemo.loading;
 
import android.graphics.canvas;
import android.graphics.paint;
import android.view.view;
 
/**
 * created by lidongon 2016/1/31
 */
public abstract class baseindicatorcontroller {
 
  private view mtarget;
 
 
  public void settarget(view target){
    this.mtarget=target;
  }
 
  public view gettarget(){
    return mtarget;
  }
 
  /**
   * 得到view的宽度
   * @return
   */
  public int getwidth(){
    return mtarget.getwidth();
  }
 
  /**
   * 得到view的高度
   * @return
   */
  public int getheight(){
    return mtarget.getheight();
  }
 
  /**
   * 刷新view
   */
  public void postinvalidate(){
    mtarget.postinvalidate();
  }
 
  /**
   * draw indicator what ever
   * you want to draw
   * 绘制indicate
   * @param canvas
   * @param paint
   */
  public abstract void draw(canvas canvas,paint paint);
 
  /**
   * create animation or animations
   * ,and add to your indicator.
   * 创建动画或者动画集合，添加到indcator
   */
  public abstract void createanimation();
 
 
}

 ballspinfadeloaderindicator.java

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package com.chni.lidong.androidtestdemo.loading;
 
import android.graphics.canvas;
import android.graphics.paint;
 
import com.nineoldandroids.animation.valueanimator;
 
/**
 * created by lidongon 2016/1/31
 */
public class ballspinfadeloaderindicator extends baseindicatorcontroller {
 
  public static final float scale=1.0f;
 
  public static final int alpha=255;
  /**
   * 圆点的比例
   */
  float[] scalefloats=new float[]{scale,
      scale,
      scale,
      scale,
      scale,
      scale,
      scale,
      scale};
  /**
   * 圆点的透明度集合
   */
  int[] alphas=new int[]{alpha,
      alpha,
      alpha,
      alpha,
      alpha,
      alpha,
      alpha,
      alpha};
 
 
  @override
  public void draw(canvas canvas, paint paint) {
    float radius=getwidth()/10;
    for (int i = 0; i < 8; i++) {
      canvas.save();
      point point=circleat(getwidth(),getheight(),getwidth()/2-radius,i*(math.pi/4));
      canvas.translate(point.x,point.y);
      canvas.scale(scalefloats[i],scalefloats[i]);
      paint.setalpha(alphas[i]);
      canvas.drawcircle(0,0,radius,paint);
      canvas.restore();
    }
  }
 
  /**
   * 圆o的圆心为(a,b),半径为r,点a与到x轴的为角α.
   *则点a的坐标为(a+r*cosα,b+r*sinα)
   * @param width
   * @param height
   * @param radius
   * @param angle
   * @return
   */
  point circleat(int width,int height,float radius,double angle){
    float x= (float) (width/2+radius*(math.cos(angle)));
    float y= (float) (height/2+radius*(math.sin(angle)));
    return new point(x,y);
  }
 
  @override
  public void createanimation() {
    int[] delays= {0, 120, 240, 360, 480, 600, 720, 780, 840};
    for (int i = 0; i < 8; i++) {
      final int index=i;
      valueanimator scaleanim=valueanimator.offloat(1,0.4f,1);//创建valueanimator对象
      scaleanim.setduration(1000);//设置动画的持续时间
      scaleanim.setrepeatcount(-1);//设置动画是否重复
      scaleanim.setstartdelay(delays[i]);//延迟启动动画
      scaleanim.addupdatelistener(new valueanimator.animatorupdatelistener() {//valueanimator只负责第一次的内容，因此必须通过监听来实现对象的相关属性的更新
        @override
        public void onanimationupdate(valueanimator animation) {
          scalefloats[index] = (float) animation.getanimatedvalue();//获取当前帧的值
          postinvalidate();
        }
      });
      scaleanim.start();//启动属性动画
 
      valueanimator alphaanim=valueanimator.ofint(255, 77, 255);//透明度动画
      alphaanim.setduration(1000);//
      alphaanim.setrepeatcount(-1);
      alphaanim.setstartdelay(delays[i]);
      alphaanim.addupdatelistener(new valueanimator.animatorupdatelistener() {
        @override
        public void onanimationupdate(valueanimator animation) {
          alphas[index] = (int) animation.getanimatedvalue();
          postinvalidate();
        }
      });
      alphaanim.start();
    }
  }
 
  final class point{
    public float x;
    public float y;
 
    public point(float x, float y){
      this.x=x;
      this.y=y;
    }
  }
 
 
}

uihelp.java

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package com.chni.lidong.androidtestdemo.utils;
 
import android.app.activity;
import android.app.dialog;
import android.view.layoutinflater;
import android.view.view;
import android.widget.linearlayout;
import android.widget.textview;
 
import com.chni.lidong.androidtestdemo.r;
 
/**
 * 对话框的实现
 * @author 李东
 * @date 2014-11-23
 */
public class uihelper {
   
  /** 加载数据对话框 */
  private static dialog mloadingdialog;
   
   
  /**
   * 显示加载对话框
   * @param context 上下文
   * @param msg 对话框显示内容
   * @param cancelable 对话框是否可以取消
   */
  public static void showdialogforloading(activity context, string msg, boolean cancelable) {
    view view = layoutinflater.from(context).inflate(r.layout.layout_loading_dialog, null);
    textview loadingtext = (textview)view.findviewbyid(r.id.id_tv_loading_dialog_text);
    loadingtext.settext(msg);
     
    mloadingdialog = new dialog(context, r.style.loading_dialog_style);
    mloadingdialog.setcancelable(cancelable);
    mloadingdialog.setcontentview(view, new linearlayout.layoutparams(linearlayout.layoutparams.match_parent, linearlayout.layoutparams.match_parent));
    mloadingdialog.show();   
  }
   
  /**
   * 关闭加载对话框
   */
  public static void hidedialogforloading() {
    if(mloadingdialog != null && mloadingdialog.isshowing()) {
      mloadingdialog.cancel();
    }
  }
 
}

对话框的布局：

 

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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@drawable/bg_loading_dialog_shape"
  android:gravity="center"
  android:minheight="60dp"
  android:minwidth="180dp"
  android:orientation="vertical"
  android:padding="@dimen/padding_10" >
 
  <linearlayout
    android:layout_width="wrap_content"
    android:layout_weight="1"
    android:gravity="center"
    android:layout_height="wrap_content">
 
    <com.chni.lidong.androidtestdemo.loading.avloadingindicatorview
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      app:indicator="ballspinfadeloader"
      app:indicator_color="@color/green"
      />
 
  </linearlayout>
 
  <textview
    android:id="@+id/id_tv_loading_dialog_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margintop="@dimen/padding_5"
    android:text="正在登录…"
    android:textcolor="@color/content"
    android:textsize="14sp" />
 
</linearlayout>

对话框的样式：

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<!-- 自定义loading dialog -->
<style name="loading_dialog_style" parent="@android:style/theme.dialog">
  <item name="android:windowframe">@null</item>
  <item name="android:windownotitle">true</item>
  <item name="android:windowbackground">@color/transparent</item>
  <item name="android:windowisfloating">true</item>
  <item name="android:windowcontentoverlay">@null</item>
</style>

mainactivity.java

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public class main7activity extends appcompatactivity {
 
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main7);
    toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);
    setsupportactionbar(toolbar);
 
    floatingactionbutton fab = (floatingactionbutton) findviewbyid(r.id.fab);
    fab.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view view) {
        snackbar.make(view, "replace with your own action", snackbar.length_long)
            .setaction("action", null).show();
      }
    });
    uihelper.showdialogforloading(this, "正在加载...", true);
    handler handler = new handler();
    handler.postdelayed(new runnable() {
      @override
      public void run() {
        uihelper.hidedialogforloading();
      }
    },10000);
  }
 
}

效果图;

Android自定义等待对话框

以上就是本文的全部内容，希望对大家的学习有所帮助。