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。
<ProgressBarandroid: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" /><gradientandroid: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" /><gradientandroid: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" /><gradientandroid: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--><paddingandroid: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() {@Overridepublic void onAnimationStart(Animation arg0) {}@Overridepublic void onAnimationRepeat(Animation arg0) {}@Overridepublic 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" >
<RelativeLayoutandroid:id="@+id/bgLayout"android:layout_width="match_parent"android:layout_height="match_parent"android:background="#66000000" ><Viewandroid: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() {@Overridepublic void onAnimationStart(Animation arg0) {}@Overridepublic void onAnimationRepeat(Animation arg0) {}@Overridepublic 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;@Overrideprotected 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);}@Overridepublic 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;}}@Overrideprotected void onDestroy() {super.onDestroy();loadingColorDialog.dismiss();}@Overridepublic void onBackPressed() {if (loadingDialog.isShowing()) {loadingDialog.dismiss();} else if (loadingColorDialog.isShowing()){loadingColorDialog.dismiss();} else if (loadingColorDialog2.isShowing()){loadingColorDialog2.dismiss();} else {finish();}}}
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