標籤:android progressdialog
在項目中,我們經常需要通過網路請求去服務端擷取相應的資料,以便於在用戶端進行展示。而這個過程是需要網路的,因此就有了等待的過程。對於網路快的童靴,那麼等待的時間就短;而對於網路慢的童靴,那麼等待的時間就長。因此為了消除童靴們等待的焦慮感,我們需要顯示一個progress dialog來提示童靴們,資料正在擷取中,請稍候片刻。
先上,如下:
那麼如何?呢?直接上代碼
1. 在anim檔案夾下建立sf_progress_dialog_anim.xml,實現轉動的效果:
<?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表示動畫只播放一次停留在最後一幀上,當設定為false時,則代表動畫迴圈播放;否則,則代表動畫只播放一次。
資源檔可到如下連結進行下載:
http://download.csdn.net/detail/shenjichao2008/8248073
2. 在values檔案夾中建立style.xml,自訂progress dialog的樣式:
<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檔案夾中建立sf_view_custom_progress_dialog.xml,自訂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. 建立SFProgrssDialog類,繼承Dialog,實現如下:
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;}@Overridepublic 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);elseloadingTextView.setText(R.string.sf_progress_dialog_image_loading);return m_progrssDialog;}}
5. 編寫顯示/隱藏 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. 在網路請求之前,調用showCustomProgrssDialog方法,傳入顯示的message;在網路響應之後,調用hideProgressDialog方法,消除progress dialog。
Android ProgressDialog 控制項自訂