我們在項目中經常會遇到這樣一個應用場景:執行某個耗時操作時,爲了安撫用戶等待的煩躁心情我們一般會使用進度條之類的空間,在android中讓大家最 容易想到的就是progressbar或者progressDialog,區別在於前者是一個控件,後者是對話框。由於一些需求在彈出進度條時不希望用戶 能夠操作其他控件,所以只能使用progressDialog,這個時候有遇到了一個問題,我不想要progressDialog的黑色框框,感覺這樣跟 應用的整體風格不協調,這個時候就考慮了寫一個自定義的progressDialog。
在網上搜過很多自定義progressDialog的例子,對着寫了下,但是沒有任何效果,不知道是自己使用的方法不對還是什麼地方出錯了。通過不斷的查找資料,寫了一個簡單的自定義progressDialog。先上圖看下效果:
1.String.xml 文件,progressDialog是繼承與Dialog,先設置一下progressDialog的風格,設置背景透明色。
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< style name = "CustomDialog" parent = "@android:style/Theme.Dialog" > |
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< item name = "android:windowFrame" >@null</ item > |
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< item name = "android:windowIsFloating" >true</ item > |
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< item name = "android:windowContentOverlay" >@null</ item > |
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< item name = "android:windowAnimationStyle" >@android:style/Animation.Dialog</ item > |
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< item name = "android:windowSoftInputMode" >stateUnspecified|adjustPan</ item > |
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< style name = "CustomProgressDialog" parent = "@style/CustomDialog" > |
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< item name = "android:windowBackground" >@android:color/transparent</ item > |
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< item name = "android:windowNoTitle" >true</ item > |
2.customprogressdialog.xml文件,定義自己的佈局,由於我的需求只需要一個進度條以及一串顯示的內容,所以佈局比較接單
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<? xml version = "1.0" encoding = "utf-8" ?> |
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xmlns:android = "http://schemas.android.com/apk/res/android" |
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android:layout_width = "fill_parent" |
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android:layout_height = "fill_parent" |
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android:orientation = "horizontal" > |
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android:id = "@+id/loadingImageView" |
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android:layout_width = "wrap_content" |
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android:layout_height = "wrap_content" |
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android:background = "@anim/progress_round" /> |
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android:id = "@+id/id_tv_loadingmsg" |
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android:layout_width = "wrap_content" |
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android:layout_height = "wrap_content" |
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android:layout_gravity = "center_vertical" |
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android:textSize = "20dp" /> |
3.progress_round.xml文件.這個文件爲了實現轉動的效果,循環顯示這些圖片。
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<? xml version = "1.0" encoding = "utf-8" ?> |
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xmlns:android = "http://schemas.android.com/apk/res/android" |
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android:oneshot = "false" > |
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< item android:drawable = "@drawable/progress_1" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_2" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_3" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_4" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_5" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_6" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_7" android:duration = "200" /> |
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< item android:drawable = "@drawable/progress_8" android:duration = "200" /> |
4.CustomProgressDialog.java文件,這個是就是我們最終需要使用的progressDialog了。
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/************************************************************************************** |
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*
CustomProgressDialog.java |
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*
Copyright 2012 LXD All Rights Reserved. |
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*
Version Date Author Record |
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*-------------------------------------------------------------------------------------- |
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**************************************************************************************/ |
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package com.lxd.widgets; |
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import com.lxd.activity.R; |
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import android.app.Dialog; |
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import android.content.Context; |
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import android.graphics.drawable.AnimationDrawable; |
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import android.view.Gravity; |
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import android.widget.ImageView; |
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import android.widget.TextView; |
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/******************************************************************** |
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*
TODO 請在此處簡要描述此類所實現的功能。因爲這項註釋主要是爲了在IDE環境中生成tip幫助,務必簡明扼要 |
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*
TODO 請在此處詳細描述類的功能、調用方法、注意事項、以及與其它類的關係. |
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*******************************************************************/ |
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public class CustomProgressDialog extends Dialog
{ |
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private Context
context = null ; |
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private static CustomProgressDialog
customProgressDialog = null ; |
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public CustomProgressDialog(Context
context){ |
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this .context
= context; |
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public CustomProgressDialog(Context
context, int theme)
{ |
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super (context,
theme); |
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public static CustomProgressDialog
createDialog(Context context){ |
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customProgressDialog
= new CustomProgressDialog(context,R.style.CustomProgressDialog); |
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customProgressDialog.setContentView(R.layout.customprogressdialog); |
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customProgressDialog.getWindow().getAttributes().gravity
= Gravity.CENTER; |
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return customProgressDialog; |
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public void onWindowFocusChanged( boolean hasFocus){ |
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if (customProgressDialog
== null ){ |
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ImageView
imageView = (ImageView) customProgressDialog.findViewById(R.id.loadingImageView); |
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AnimationDrawable
animationDrawable = (AnimationDrawable) imageView.getBackground(); |
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animationDrawable.start(); |
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public CustomProgressDialog
setTitile(String strTitle){ |
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return customProgressDialog; |
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public CustomProgressDialog
setMessage(String strMessage){ |
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TextView
tvMsg = (TextView)customProgressDialog.findViewById(R.id.id_tv_loadingmsg); |
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tvMsg.setText(strMessage); |
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return customProgressDialog; |
5.接下來就是寫一個測試activity調用我們的progressDialog了。
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package com.lxd.activity; |
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import com.lxd.widgets.CustomProgressDialog; |
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import android.app.Activity; |
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import android.os.AsyncTask; |
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import android.os.Bundle; |
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import android.view.Window; |
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import android.view.WindowManager; |
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public class MainFrame extends Activity
{ |
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private MainFrameTask
mMainFrameTask = null ; |
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private CustomProgressDialog
progressDialog = null ; |
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public void onCreate(Bundle
savedInstanceState) { |
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super .onCreate(savedInstanceState); |
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this .requestWindowFeature(Window.FEATURE_NO_TITLE); |
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this .getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, |
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WindowManager.LayoutParams.FLAG_FULLSCREEN); |
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setContentView(R.layout.main); |
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mMainFrameTask
= new MainFrameTask( this ); |
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mMainFrameTask.execute(); |
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protected void onDestroy()
{ |
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if (mMainFrameTask
!= null &&
!mMainFrameTask.isCancelled()){ |
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mMainFrameTask.cancel( true ); |
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private void startProgressDialog(){ |
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if (progressDialog
== null ){ |
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progressDialog
= CustomProgressDialog.createDialog( this ); |
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progressDialog.setMessage( "正在加載中..." ); |
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progressDialog.show(); |
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private void stopProgressDialog(){ |
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if (progressDialog
!= null ){ |
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progressDialog.dismiss(); |
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progressDialog
= null ; |
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public class MainFrameTask extends AsyncTask<Integer,
String, Integer>{ |
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private MainFrame
mainFrame = null ; |
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public MainFrameTask(MainFrame
mainFrame){ |
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this .mainFrame
= mainFrame; |
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protected void onCancelled()
{ |
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protected Integer
doInBackground(Integer... params) { |
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Thread.sleep( 10 * 1000 ); |
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} catch (InterruptedException
e) { |
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protected void onPreExecute()
{ |
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startProgressDialog(); |
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protected void onPostExecute(Integer
result) { |
這樣我們需要的progressDialog效果就出來了