Android自定義ProgressDialog

MainActivity如下:

package cn.testprogressdialog;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.os.Bundle;
import android.view.Window;
/**
 * Demo描述:
 * 自定義ProgressDialog
 * 
 * 備注說明:
 * 在此處progressDialog.setOnCancelListener(){}
 * 并沒有起到按下back鍵盤使風火輪消失的作用.
 * 因為在initDialog(Context context)中設置了
 * dialog.setCancelable(false);
 * 若需要此功能,注釋掉該句代碼即可.
 */
public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Dialog progressDialog=initDialog(MainActivity.this);
        progressDialog.setOnCancelListener(new OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                dialog.dismiss();
                //其余業務邏輯
            }
        });
        progressDialog.show();
    }

    public Dialog initDialog(Context context) {
        Dialog dialog = new DialogSubClass(MainActivity.this, R.style.dialog);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setCancelable(false);
        return dialog;
    }

}

DialogSubClass如下:

package cn.testprogressdialog;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
public class DialogSubClass extends Dialog {
    public DialogSubClass(Context context, int theme) {
        super(context, theme);
    }

    protected DialogSubClass(Context context, boolean cancelable,OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }

    public DialogSubClass(Context context) {
        super(context);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View view = LayoutInflater.from(getContext()).inflate(R.layout.dialoglayout, null);
        setContentView(view);
    }

    @Override
    public void show() {
        super.show();
    }

    @Override
    public void dismiss() {
        super.dismiss();
    }

    public void setMsg(String txt) {

    }

}

dialoglayout.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="loading"
        android:textSize="20sp"
        android:layout_below="@id/progressBar"
        android:layout_marginTop="-5dip"
        android:layout_centerHorizontal="true"
        android:textColor="@android:color/black" 
        />

</RelativeLayout>

styles.xml如下:

<resources>

    <style name="AppBaseTheme" parent="android:Theme.Light"></style>

    <style name="AppTheme" parent="AppBaseTheme"></style>

    <style name="dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>

</resources>

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="測試自定義ProgressDialog"
        android:layout_centerHorizontal="true"
        android:textSize="24sp"
    />

</RelativeLayout>