在项目中,我们经常需要通过网络请求去服务端获取相应的数据,以便于在客户端进行展示。而这个过程是需要网络的,因此就有了等待的过程。对于网络快的童靴,那么等待的时间就短;而对于网络慢的童靴,那么等待的时间就长。因此为了消除童靴们等待的焦虑感,我们需要显示一个progress dialog来提示童靴们,数据正在获取中,请稍候片刻。
先上效果图,效果图如下:
那么如何实现呢?直接上代码
1. 在anim文件夹下创建sf_progress_dialog_anim.xml,实现转动的效果:
<?xml version="1.0" encoding="utf-8"?> <animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false" > <item android:drawable="@drawable/sf_progress_1" android:duration="200"/> <item android:drawable="@drawable/sf_progress_2" android:duration="200"/> <item android:drawable="@drawable/sf_progress_3" android:duration="200"/> <item android:drawable="@drawable/sf_progress_4" android:duration="200"/> <item android:drawable="@drawable/sf_progress_5" android:duration="200"/> <item android:drawable="@drawable/sf_progress_6" android:duration="200"/> <item android:drawable="@drawable/sf_progress_7" android:duration="200"/> <item android:drawable="@drawable/sf_progress_8" android:duration="60"/> </animation-list>
其中:android:oneshot表示动画只播放一次停留在最后一帧上,当设置为false时,则代表动画循环播放;否则,则代表动画只播放一次。
资源文件可到如下链接进行下载:
http://download.csdn.net/detail/shenjichao2008/8248073
2. 在values文件夹中创建style.xml,自定义progress dialog的样式:
<style name="SF_dialogCustom" parent="@android:style/Theme.Dialog"> <item name="android:windowFrame">@null</item> <item name="android:windowIsFloating">true</item> <item name="android:windowContentOverlay">@null</item> <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item> <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item> </style> <style name="SF_pressDialogCustom" parent="@style/SF_dialogCustom"> <item name="android:windowBackground">@android:color/transparent</item> <item name="android:windowNoTitle">true</item> </style>
3. 在layout文件夹中创建sf_view_custom_progress_dialog.xml,自定义progress dilaog的布局:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <ImageView android:id="@+id/sf_iv_progress_dialog_loading" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@anim/sf_progress_dialog_anim" android:contentDescription="@string/sf_progress_dialog_image_loading" /> <TextView android:id="@+id/sf_tv_progress_dialog_loading" style="@style/SF_MediumLightGreyTxt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" /> </LinearLayout>
4. 创建SFProgrssDialog类,继承Dialog,实现如下:
package com.snapfish.view; import com.snapfish.R; import android.app.Dialog; import android.content.Context; import android.graphics.drawable.AnimationDrawable; import android.text.TextUtils; import android.view.Gravity; import android.widget.ImageView; import android.widget.TextView; public class SFProgrssDialog extends Dialog { private static SFProgrssDialog m_progrssDialog; private SFProgrssDialog(Context context, int theme) { super(context, theme); } public static SFProgrssDialog createProgrssDialog(Context context) { m_progrssDialog = new SFProgrssDialog(context, R.style.SF_pressDialogCustom); m_progrssDialog.setContentView(R.layout.sf_view_custom_progress_dialog); m_progrssDialog.getWindow().getAttributes().gravity = Gravity.CENTER; return m_progrssDialog; } @Override public void onWindowFocusChanged(boolean hasFocus) { if (null == m_progrssDialog) return; ImageView loadingImageView = (ImageView) m_progrssDialog .findViewById(R.id.sf_iv_progress_dialog_loading); AnimationDrawable animationDrawable = (AnimationDrawable) loadingImageView .getBackground(); animationDrawable.start(); } public SFProgrssDialog setMessage(String msg) { TextView loadingTextView = (TextView) m_progrssDialog .findViewById(R.id.sf_tv_progress_dialog_loading); if (!TextUtils.isEmpty(msg)) loadingTextView.setText(msg); else loadingTextView.setText(R.string.sf_progress_dialog_image_loading); return m_progrssDialog; } }
5. 编写显示/隐藏 progress dialog的方法:
private SFProgrssDialog m_customProgrssDialog; final void showCustomProgrssDialog(String msg) { if (null == m_customProgrssDialog) m_customProgrssDialog = SFProgrssDialog .createProgrssDialog(m_parent); if (null != m_customProgrssDialog) { m_customProgrssDialog.setMessage(msg); m_customProgrssDialog.show(); m_customProgrssDialog.setCancelable(false); } } final void hideCustomProgressDialog() { if (null != m_customProgrssDialog) { m_customProgrssDialog.dismiss(); m_customProgrssDialog = null; } }
6. 在网络请求之前,调用showCustomProgrssDialog方法,传入显示的message;在网络响应之后,调用hideProgressDialog方法,消除progress dialog。
时间: 2024-11-06 03:51:18