通用Dialog避免IllegalArgumentException（上）

package com.youpinwallet.ypw.view;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.view.Gravity;
import android.view.WindowManager;
import com.youpinwallet.ypw.R;
/*
 * 白色背景，垂直居中
 * @author Administrator
 *
 */
public class NewDialog extends Dialog {
    Activity mParentActivity;
    public NewDialog(Context context, int theme) {
        super(context, theme);
        mParentActivity= (Activity) context;
    }
    public NewDialog(Context context) {
        super(context);
    }
    /**
     * 弹出自定义ProgressDialog
     *
     * @param context        上下文
     * @param cancelable     是否按返回键取消
     * @param cancelListener 按下返回键监听
     * @return
     */
    public static NewDialog create(Context context, boolean cancelable, OnCancelListener cancelListener) {
        NewDialog dialog = new NewDialog(context, R.style.Custom_Progress);
        dialog.setContentView(R.layout.progress_layout);
        // 按返回键是否取消
        dialog.setCancelable(cancelable);
        // 监听返回键处理
        dialog.setOnCancelListener(cancelListener);
        // 设置居中
        dialog.getWindow().getAttributes().gravity = Gravity.CENTER;
        WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();
        // 设置背景层透明度
        lp.dimAmount = 0.2f;
        dialog.getWindow().setAttributes(lp);
//    dialog.show();
        return dialog;
    }
    @Override
    public void dismiss()
    {
        // 避免依附界面销毁跑出的异常java.lang.IllegalArgumentException: View=com.android.internal.policy.PhoneWindow$DecorView
        if (mParentActivity != null && !mParentActivity.isFinishing())
        {
            super.dismiss();    //调用超类对应方法
        }
    }
}

package com.qunarjie.qnj.utils;
import android.content.Context;
import com.qunarjie.qnj.view.NewDialog;
//请稍等通用
public class NewDialogUtils {
    private static NewDialog dialog = null;
    public static void setNewDialog(Context context) {
        if (context != null) {
            if (dialog != null) {
                dialog.dismiss();
                dialog = null;
            }
            if (dialog == null) {
                dialog = NewDialog.create(context, true, null);
            }
            dialog.show();
        }
    }
    public static void dismissNewDialog() {
        if (dialog != null && dialog.isShowing()) {
            dialog.dismiss();
            dialog = null;
        }
    }
}

<!-- 自定义Progress -->
<style name="Custom_Progress" 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>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowCloseOnTouchOutside">false</item>
    <item name="android:windowNoTitle">true</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="@drawable/shape_dialog_white"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:paddingBottom="20dp"
    android:paddingLeft="30dp"
    android:paddingRight="30dp"
    android:paddingTop="20dp">
    <ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:indeterminateDrawable="@drawable/progressbar" />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/mdp_15"
        android:text="请稍等..."
        android:textColor="@color/color_text_dark"
        android:textSize="@dimen/msp_14" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="5dp" />
    <solid android:color="@color/white" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toDegrees="3600">
    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="8"
        android:useLevel="false">
        <gradient
            android:centerY="0.50"
            android:endColor="#12b7f5"
            android:startColor="#038fef"
            android:type="sweep"
            android:useLevel="false" />
    </shape>
</animated-rotate>