Android ProgressDialog 控件自定义
的有关信息介绍如下: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。
在anim文件夹下创建sf_progress_dialog_anim.xml,实现转动的效果:
android:oneshot="false" > android:drawable="@drawable/sf_progress_1" android:duration="200"/> android:drawable="@drawable/sf_progress_2" android:duration="200"/> android:drawable="@drawable/sf_progress_3" android:duration="200"/> android:drawable="@drawable/sf_progress_4" android:duration="200"/> android:drawable="@drawable/sf_progress_5" android:duration="200"/> android:drawable="@drawable/sf_progress_6" android:duration="200"/> android:drawable="@drawable/sf_progress_7" android:duration="200"/> android:drawable="@drawable/sf_progress_8" android:duration="60"/>
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
在values文件夹中创建style.xml,自定义progress dialog的样式:
在layout文件夹中创建sf_view_custom_progress_dialog.xml,自定义progress dilaog的布局:
android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > 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" /> 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" />
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;
}
}
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;
}
}
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。