书写全局 ProgressDialog

最近事情很多，很久没写了，给大家介绍一个知识点，全局的PorgressDialog

实现的方式很普通，我就直接上代码了,至于效果图大家自己去演示：

import android.app.AlertDialog;
import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
import com.lyn.fbird.app.WKXApplication;
import com.lyn.fbird.util.Tools;
import com.lyn.loginUI.R;
import com.lyn.wkxannotationlib.utils.Utils;

/**
 * @类名:ProgressDialogUtil
 * @类描述:全局加载框
 * @作者:Administrator
 */
public class ProgressDialogUtil {
    private static final int START_DIALOG = 0;
    private static final int UPDATE_DIALOG = 1;
    private static final int STOP_DIALOG = 2;
    private static AlertDialog dialog = null;
    private static TextView title = null;
    private static Context context = null;

    private static Handler handler = new Handler(Looper.getMainLooper()) {
        public void handleMessage(android.os.Message msg) {
            String message = "";
            switch (msg.what) {
            case START_DIALOG:// 启动加载框
                message = (String) msg.obj;
                if (dialog != null) {
                    stopLoad();
                }
                init(message);
                isTouchDismiss(false);
                break;
            case UPDATE_DIALOG:// 更新加载框
                message = (String) msg.obj;
                if (title.VISIBLE == View.VISIBLE) {
                    if (Utils.isEmpty(message)) {
                        title.setVisibility(View.GONE);
                    } else {
                        title.setText(message);
                    }
                } else {
                    if (!Utils.isEmpty(message)) {
                        title.setText(message);
                        title.setVisibility(View.VISIBLE);
                    }
                }
                break;
            case STOP_DIALOG:// 停止加载框
                if (dialog != null) {
                    dialog.dismiss();
                    dialog.cancel();
                    dialog = null;
                    title = null;
                }
                break;
            }
        };
    };

    /**
     * @方法说明:加载控件与布局
     * @方法名称:init
     * @返回值:void
     */
    private static void init(String mssg) {
        if (!WKXApplication.isAppOnForeground()) {
            return;
        }

        if (null != context) {
            LayoutInflater flat = LayoutInflater.from(context);
            View v = flat.inflate(R.layout.loading, null);
            // 创建对话
            dialog = new AlertDialog.Builder(context).create();
            // 设置返回键点击消失对话框
            dialog.setCancelable(true);
            // 设置点击返回框外边不消失
            dialog.setCanceledOnTouchOutside(false);
            // 给该对话框增加系统权限
            dialog.getWindow().setType(
                    WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            // 显示对话
            dialog.show();

            // 加载控件
            ImageView progressImageView = (ImageView) v
                    .findViewById(R.id.loading_animato);
            title = (TextView) v.findViewById(R.id.loading_title);
            View loadingGroup = v.findViewById(R.id.loading_group);

            if (Utils.isEmpty(mssg)) {
                title.setVisibility(View.GONE);
                loadingGroup.setBackgroundColor(Tools.getUiContext()
                        .getResources().getColor(R.color.colorless));
            } else {
                title.setVisibility(View.VISIBLE);
                title.setText(mssg);
            }
            Animation progressAnimato = AnimationUtils.loadAnimation(
                    Tools.getUiContext(), R.anim.loading_rotate);
            progressImageView.startAnimation(progressAnimato);

            // 必须放到显示对话框下面，否则显示不出效果
            Window window = dialog.getWindow();
            WindowManager.LayoutParams params = window.getAttributes();
            params.width = ViewGroup.LayoutParams.MATCH_PARENT;
            params.height = ViewGroup.LayoutParams.MATCH_PARENT;
            params.gravity = Gravity.CENTER;
            window.setAttributes(params);
            // 加载布局组件
            dialog.getWindow().setContentView(v);
        }
    }

    /**
     * @方法说明:启动对话框
     * @方法名称:startLoad
     * @param con
     * @param msg
     * @返回值:void
     */
    public static void startLoad(Context con, String msg) {
        context = con;
        Message mssage = new Message();
        mssage.what = START_DIALOG;
        mssage.obj = msg;
        handler.sendMessage(mssage);
    }

    /**
     * @方法说明:更新显示的内容
     * @方法名称:UpdateMsg
     * @param msg
     * @返回值:void
     */
    public static void UpdateMsg(String msg) {
        Message message = new Message();
        message.what = UPDATE_DIALOG;
        message.obj = msg;
        handler.sendMessage(message);
    }

    /**
     * @方法说明:允许加载条转动的时候去点击系统返回键
     * @方法名称:openCancelable
     * @param flag
     * @返回值:void
     */
    public static void openCancelable(boolean flag) {
        if (dialog != null) {
            dialog.setCancelable(flag);
        }
    }

    /**
     * @方法说明:允许点击对话框触摸消失
     * @方法名称:isTouchDismiss
     * @param isdimiss
     * @返回值:void
     */
    public static void isTouchDismiss(boolean isdimiss) {
        if (dialog != null) {
            dialog.setCanceledOnTouchOutside(isdimiss);
        }
    }

    /**
     * @方法说明:让警告框消失
     * @方法名称:dismiss
     * @返回值:void
     */
    public static void stopLoad() {
        handler.sendEmptyMessage(STOP_DIALOG);
    }
}

上布局文件，很简单的不能再简单,layout/loading.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/colorless"
    android:gravity="center" >

    <LinearLayout
        android:id="@+id/loading_group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/new_data_toast"
        android:orientation="vertical"
        android:padding="30dip" >

        <ImageView
            android:id="@+id/loading_animato"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:background="@color/colorless"
            android:src="@drawable/loading_image" />

        <TextView
            android:id="@+id/loading_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:gravity="center"
            android:textColor="@color/white"
            android:textSize="15sp" />
    </LinearLayout>

</LinearLayout>

最后上转圈菊花的动画效果 anim/loading_rotate.xml：

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="800"
    android:fromDegrees="0"
    android:interpolator="@android:anim/linear_interpolator"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="infinite"
    android:repeatMode="restart"
    android:toDegrees="+360" >

</rotate>