Android自定义等待对话框

概述最近，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。

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

<declare-styleable name="AVLoadingIndicatorVIEw">     <attr name="indicator">       <flag name="BallSpinFadeLoader" value="22"/>     </attr>     <attr name="indicator_color" format="color"/>   </declare-styleable> <pre name="code" >

LoadingIndicatorVIEw.java 

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,AttributeSet attrs,int defStyleAttr) {     super(context,attrs,defStyleAttr);     init(attrs,defStyleAttr);   }     @TargetAPI(Build.VERSION_CODES.LolliPOP)   public LoadingIndicatorVIEw(Context context,int defStyleAttr,int defStyleRes) {     super(context,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

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

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};   /**    * 圆点的透明度集合    */   int[] Alphas=new int[]{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,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

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：

<?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：

<!-- 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

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;

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