安卓简单的加载进度对话框实现

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/dialog_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/coner_rect_white_bg"
android:gravity="center"
android:minHeight="100dp"
android:minWidth="190dp"
android:orientation="vertical"
android:padding="10dp">

<ImageView
android:id="@+id/img"
android:layout_width="40dp"
android:layout_height="40dp"
android:src="@drawable/mg_loading" />

<TextView
android:id="@+id/tipTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:textColor="#acacac"
android:textSize="15sp" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<rotate
android:duration="1500"
android:fromDegrees="0"
android:interpolator="@android:anim/linear_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="-1"
android:repeatMode="restart"
android:startOffset="-1"
android:toDegrees="+360" />
</set>

<shape
xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@android:color/white" />
<stroke android:width="0.5dip" android:color="@color/white" />
<corners android:radius="10dip" />

</shape>

<!-- 自定义loading dialog -->
<style name="loading_dialog" parent="android:style/Theme.Dialog">
<item name="android:windowFrame">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>

public class CustomDialog {
public static Dialog createLoadingDialog(Context context, String msg) {
// 首先得到整个View
View view = LayoutInflater.from(context).inflate(R.layout.load_view, null);
// 获取整个布局
LinearLayout layout = (LinearLayout) view.findViewById(R.id.dialog_view);
// 页面中的Img
ImageView img = (ImageView) view.findViewById(R.id.img);
// 页面中显示文本
TextView tipText = (TextView) view.findViewById(R.id.tipTextView);
//         加载动画，动画用户使img图片不停的旋转
Animation animation = AnimationUtils.loadAnimation(context,
R.anim.loading_anim);     // 显示动画
img.startAnimation(animation);     // 显示文本
tipText.setText(msg);       // 创建自定义样式的Dialog
Dialog loadingDialog = new Dialog(context, R.style.loading_dialog);
//         设置返回键无效
loadingDialog.setCancelable(true);
loadingDialog.setContentView(layout, new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT));
return loadingDialog;
}

}

private void showDialog() {
if (dialog == null) {
dialog = CustomDialog.createLoadingDialog(this, "正在加载中...");
dialog.show();
}
}

/**
* 关闭Dialog
*/
private void closeDialog() {
if (dialog != null) {
dialog.dismiss();
dialog = null;
}
}