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Android loading进度条使用简单总结

在这里,总结一下loading进度条的使用简单总结一下。

一、说起进度条,必须说说条形进度条,经常都会使用到嘛,特别是下载文件进度等等,还有像腾讯QQ安装进度条一样,有个进度总给人良好的用户体验。

先来找图看看,做这个图完成不用图片就可以做到了。

看下xml布局文件,其实就是直接用xml写的在加两个属性设置一下就好了,一个style,另一个是background。

    <ProgressBar        android:id="@+id/pb_progressbar"        style="@style/StyleProgressBarMini"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_margin="30dp"        android:background="@drawable/shape_progressbar_bg"        android:max="100"        android:progress="50" />

先看style吧

    <style name="StyleProgressBarMini" parent="@android:style/Widget.ProgressBar.Horizontal">         <item name="android:maxHeight">50dip</item>         <item name="android:minHeight">10dip</item>         <item name="android:indeterminateOnly">false</item>         <item name="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>         <item name="android:progressDrawable">@drawable/shape_progressbar_mini</item>     </style>

这里的progressDrawable又是引用一个自定义drawable,不是图片哦。

shape_progressbar_mini.xml

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android" >	<!-- 背景 -->    <item android:id="@android:id/background">        <shape>            <corners android:radius="5dip" />            <gradient                android:angle="270"                android:centerY="0.75"                android:endColor="#FFFFFF"                android:startColor="#FFFFFF" />        </shape>    </item>    <item android:id="@android:id/secondaryProgress">        <clip>            <shape>                <corners android:radius="0dip" />                <gradient                    android:angle="270"                    android:centerY="0.75"                    android:endColor="#df0024"                    android:startColor="#df0024" />            </shape>        </clip>    </item>    <item android:id="@android:id/progress">        <clip>            <shape>                <corners android:radius="5dip" />                <gradient                    android:angle="270"                    android:centerY="0.75"                    android:endColor="#de42ec"                    android:startColor="#de42ec" />            </shape>        </clip>    </item></layer-list>

再来看看shape_progressbar_bg.xml

<?xml version="1.0" encoding="UTF-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle" >    <!-- 边框填充的颜色 -->    <solid android:color="#cecece" />    <!-- 设置进度条的四个角为弧形 -->    <!-- android:radius 弧形的半径 -->    <corners android:radius="90dp" />     <!--    padding:边界的间隔-->    <padding        android:bottom="1dp"        android:left="1dp"        android:right="1dp"        android:top="1dp" /></shape>

就这样把一个漂亮的条形进度条做好了,在shape_progressbar_bg.xml中,边框填充的颜色是一种挺好的方法,加了一个进度条的边框。另外为了进度条四个角都是圆形的,就用了这个属性<corners android:radius="90dp" /> 。

搞定,这个时候可以开心一下了,去喝杯水先。

 

二、圆形进度条。另一个比较常用的就是圆形进度条,表示正在进行中。。。

来看2张小图

 

先看第一张,分析下代码,用自定义的view,用pop来做的哦。LoadingDialog.java

public class LoadingDialog {	private Context context;	private PopupWindow popupDialog;	private LayoutInflater layoutInflater;	private RelativeLayout layout;	private RelativeLayout layout_bg;	private View circleView;	private RotateAnimation rotateAnim;	private AlphaAnimation alphaAnim_in;	private AlphaAnimation alphaAnim_out;	public LoadingDialog(Context context) {		layoutInflater = LayoutInflater.from(context);		this.context = context;	}	private void initAnim() {		rotateAnim = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);		rotateAnim.setDuration(2000);		rotateAnim.setRepeatMode(Animation.RESTART);		rotateAnim.setRepeatCount(-1);		rotateAnim.setInterpolator(new LinearInterpolator());		alphaAnim_in = new AlphaAnimation(0f, 1f);		alphaAnim_in.setFillAfter(true);		alphaAnim_in.setDuration(200);		alphaAnim_in.setInterpolator(new LinearInterpolator());		alphaAnim_out = new AlphaAnimation(1f, 0f);		alphaAnim_out.setFillAfter(true);		alphaAnim_out.setDuration(100);		alphaAnim_out.setInterpolator(new LinearInterpolator());		alphaAnim_out.setAnimationListener(new AnimationListener() {			@Override			public void onAnimationStart(Animation arg0) {			}			@Override			public void onAnimationRepeat(Animation arg0) {			}			@Override			public void onAnimationEnd(Animation arg0) {				dismiss();			}		});	}	/**	 * 判断是否显示	 * @return	 */	public boolean isShowing() {		if (popupDialog != null && popupDialog.isShowing()) {			return true;		}		return false;	}	/**	 * 显示	 */	public void show() {		dismiss();		initAnim();		layout = (RelativeLayout) layoutInflater.inflate(R.layout.view_loadingdialog, null);		circleView = (View) layout.findViewById(R.id.loading_dialog);		layout_bg = (RelativeLayout) layout.findViewById(R.id.bgLayout);		popupDialog = new PopupWindow(layout, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);		View parentView = ((Activity) context).getWindow().findViewById(Window.ID_ANDROID_CONTENT);		popupDialog.showAtLocation(parentView, Gravity.CENTER, 0, 0);		layout_bg.startAnimation(alphaAnim_in);		circleView.startAnimation(rotateAnim);	}	/**	 * 隐藏	 */	public void dismiss() {		if (popupDialog != null && popupDialog.isShowing()) {			layout_bg.clearAnimation();			circleView.clearAnimation();			popupDialog.dismiss();		}	}}

这里呢引用了view_loadingdialog.xml,已作整个页面的背景和loading框。

view_loadingdialog.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" ><RelativeLayout    android:id="@+id/bgLayout"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#66000000" >    <View        android:id="@+id/loading_dialog"        android:layout_width="48dp"        android:layout_height="48dp"        android:layout_centerInParent="true"        android:background="@drawable/shape_loading_dialog" /></RelativeLayout></RelativeLayout>

再看看这个shape_loading_dialog.xml,绘制转动的圆形性状,又不用图片挺好的。

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval" >    <stroke         android:width="3dp"        android:dashWidth="2dp"        android:dashGap="3dp"        android:color="#fff"/>    <gradient         android:startColor="#00ffffff"        android:endColor="#00ffffff"        android:angle="180"/></shape>

就是这样子,实现了第一个圆形进度条。

可是如果做有颜色的圆形进度条呢,或者彩色的,后来想想不如加个图片来实现好了。

LoadingImgDialog.java

public class LoadingImgDialog {	private Context context;	private PopupWindow popupDialog;	private LayoutInflater layoutInflater;	private RelativeLayout layout;	private RelativeLayout layout_bg;	private int residBg;	private View loading_dialog;	/** 背景添加旋转动画效果,实现了转动动作   **/	private RotateAnimation rotateAnim;	/** 透明度动画效果  **/	private AlphaAnimation alphaAnim_in;	private AlphaAnimation alphaAnim_out;	public LoadingImgDialog(Context context, int residBg) {		layoutInflater = LayoutInflater.from(context);		this.residBg = residBg;		this.context = context;	}	private void initAnim() {		rotateAnim = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);		rotateAnim.setDuration(2000);		rotateAnim.setRepeatMode(Animation.RESTART);		rotateAnim.setRepeatCount(-1);		rotateAnim.setInterpolator(new LinearInterpolator());		alphaAnim_in = new AlphaAnimation(0f, 1f);		alphaAnim_in.setFillAfter(true);		alphaAnim_in.setDuration(200);		alphaAnim_in.setInterpolator(new LinearInterpolator());		alphaAnim_out = new AlphaAnimation(1f, 0f);		alphaAnim_out.setFillAfter(true);		alphaAnim_out.setDuration(100);		alphaAnim_out.setInterpolator(new LinearInterpolator());		/** 监听动作,动画结束时,隐藏LoadingColorDialog **/		alphaAnim_out.setAnimationListener(new AnimationListener() {			@Override			public void onAnimationStart(Animation arg0) {			}			@Override			public void onAnimationRepeat(Animation arg0) {			}			@Override			public void onAnimationEnd(Animation arg0) {				dismiss();			}		});	}	/**	 * 判断是否显示	 * @return	 */	public boolean isShowing() {		if (popupDialog != null && popupDialog.isShowing()) {			return true;		}		return false;	}	/**	 * 显示	 */	public void show() {		dismiss();		initAnim();		layout = (RelativeLayout) layoutInflater.inflate(R.layout.view_loadingcolordialog, null);		loading_dialog = (View) layout.findViewById(R.id.loading_dialog);		loading_dialog.setBackgroundResource(residBg);				layout_bg = (RelativeLayout) layout.findViewById(R.id.bgLayout);		popupDialog = new PopupWindow(layout, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);		View parentView = ((Activity) context).getWindow().findViewById(Window.ID_ANDROID_CONTENT);		popupDialog.showAtLocation(parentView, Gravity.CENTER, 0, 0);		layout_bg.startAnimation(alphaAnim_in);		loading_dialog.startAnimation(rotateAnim);	}	/**	 * 隐藏	 */	public void dismiss() {		if (popupDialog != null && popupDialog.isShowing()) {			layout_bg.clearAnimation();			loading_dialog.clearAnimation();			popupDialog.dismiss();		}	}}

其实就是修改了一个地方,加入residBg,用图片资源设置圆形进度条那一小部分的背景。

稍稍修改一句代码换一张图片,就变成了另一个圆形进度条了,好玩吧。

		loadingColorDialog = new LoadingImgDialog(this, R.drawable.img_loading);		loadingColorDialog2 = new LoadingImgDialog(this, R.drawable.img_loading2);

给看看全屏效果图吧,就稍稍修改一句代码换一张图片哦。

最后给MainActivity.java看看

public class MainActivity extends Activity implements OnClickListener {	Button bt_loading_dialog;	Button bt_color_loading_dialog;	Button bt_color_loading_dialog2;		LoadingDialog loadingDialog;	LoadingImgDialog loadingColorDialog;	LoadingImgDialog loadingColorDialog2;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				initView();	}	private void initView() {		bt_loading_dialog = (Button) findViewById(R.id.bt_loading_dialog);		bt_loading_dialog.setOnClickListener(this);		bt_color_loading_dialog = (Button) findViewById(R.id.bt_loading_img_dialog);		bt_color_loading_dialog.setOnClickListener(this);				bt_color_loading_dialog2 = (Button) findViewById(R.id.bt_loading_img_dialog2);		bt_color_loading_dialog2.setOnClickListener(this);				loadingDialog = new LoadingDialog(this);		loadingColorDialog = new LoadingImgDialog(this, R.drawable.img_loading);		loadingColorDialog2 = new LoadingImgDialog(this, R.drawable.img_loading2);	}	@Override	public void onClick(View view) {		switch (view.getId()) {		case R.id.bt_loading_dialog:			loadingDialog.show();			break;		case R.id.bt_loading_img_dialog:			loadingColorDialog.show();			break;		case R.id.bt_loading_img_dialog2:			loadingColorDialog2.show();			break;		default:			break;		}	}		@Override	protected void onDestroy() {		super.onDestroy();		loadingColorDialog.dismiss();	}	@Override	public void onBackPressed() {		if (loadingDialog.isShowing()) {			loadingDialog.dismiss();		} else if (loadingColorDialog.isShowing()){			loadingColorDialog.dismiss();		} else if (loadingColorDialog2.isShowing()){			loadingColorDialog2.dismiss();		} else {			finish();		}	}}

 

本文链接:http://www.cnblogs.com/liqw/p/3995794.html

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Android loading进度条使用简单总结