Android自定义ProgressDialog加载框的实现

package progressdialog.hanwei.com.dialog;
import android.app.Dialog;
import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.view.Gravity;
import android.widget.ImageView;
import android.widget.TextView;
import progressdialog.hanwei.com.R;

/**
 * Created by 陈苗辉 on 2016/12/14.
 */
public class ProgressDialog extends Dialog{


    private Context context;
    public ProgressDialog(Context context) {
        super(context);
        this.context = context;
    }

    public ProgressDialog(Context context, int themeResId) {
        super(context, themeResId);
    }

    protected ProgressDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }
    private static ProgressDialog progressDialog;
    //创建dialog的样式
    public static ProgressDialog createDialog(Context context){

        progressDialog = new ProgressDialog(context, R.style.ProgressDialogStyle);
        progressDialog.setCanceledOnTouchOutside(false);
        progressDialog.setContentView(R.layout.progressdialog);
        progressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
        return progressDialog ;
    }
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {

        if (progressDialog == null) {
            return;
        }
        //添加控件  执行帧动画
        ImageView imageView = (ImageView) progressDialog.findViewById(R.id.loadingImageView);
        AnimationDrawable animationDrawable = (AnimationDrawable) imageView.getBackground();
        animationDrawable.start();
    }

    public ProgressDialog setTitle(String title) {
        return progressDialog;
    }

    public ProgressDialog setMessage(String strMessage){
        TextView tvMessage = (TextView)progressDialog.findViewById(R.id.id_tv_loadingmsg);

        if (tvMessage != null){
            tvMessage.setText(strMessage);
        }
        return progressDialog;
    }
}

public static ProgressDialog createDialog(Context context){

    progressDialog = new ProgressDialog(context, R.style.ProgressDialogStyle);
    progressDialog.setCanceledOnTouchOutside(false);
    progressDialog.setContentView(R.layout.progressdialog);
    progressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
    return progressDialog ;
}

<style name="ProgressDialogStyle" parent="@style/ProgressDialog">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowNoTitle">true</item>
</style>

<style name="ProgressDialog" 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>
</style>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/loadingImageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/progress_round"/>
    <TextView
        android:id="@+id/id_tv_loadingmsg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:textSize="20dp"/>
</LinearLayout>

<animation-list
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:oneshot="false">
    <item android:drawable="@drawable/progress_1" android:duration="200"/>
    <item android:drawable="@drawable/progress_2" android:duration="200"/>
    <item android:drawable="@drawable/progress_3" android:duration="200"/>
    <item android:drawable="@drawable/progress_4" android:duration="200"/>
    <item android:drawable="@drawable/progress_5" android:duration="200"/>
    <item android:drawable="@drawable/progress_6" android:duration="200"/>
    <item android:drawable="@drawable/progress_7" android:duration="200"/>
    <item android:drawable="@drawable/progress_8" android:duration="200"/>
</animation-list>

ProgressDialog dialog = ProgressDialog.createDialog(this);
dialog.setMessage("数据加载中...");
dialog.show();