Android 手把手撸一个 CustomProgressDialog

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1.自定义LoadingView

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/**
 * Created by xpf on 2017/8/28 :)
 * Function:自定义加载中的Dialog
 */

public class LoadingView extends ProgressDialog {

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

    public LoadingView(Context context, int theme) {
        super(context, theme);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        init(getContext());
    }

    private void init(Context context) {
        setCancelable(true);
        setCanceledOnTouchOutside(false);
        setContentView(R.layout.loading_view);//loading的xml文件
        WindowManager.LayoutParams params = getWindow().getAttributes();
        params.width = WindowManager.LayoutParams.WRAP_CONTENT;
        params.height = WindowManager.LayoutParams.WRAP_CONTENT;
        getWindow().setAttributes(params);
    }

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

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

2.LoadingView的布局文件

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_centerInParent="true"
    android:layout_gravity="center_horizontal"
    android:background="@drawable/shape_dialog_bg"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp">

        <ProgressBar
            android:id="@+id/pb_load"
            android:layout_width="130dp"
            android:layout_height="130dp"
            android:layout_centerInParent="true"
            android:indeterminateDrawable="@drawable/progressbar" />
    </RelativeLayout>

    <TextView
        android:id="@+id/tv_load_dialog"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="加载中..."
        android:textColor="#9a9b98"
        android:textSize="24sp" />
</LinearLayout>

3.dialog圆角的shape

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<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="16dp" />
    <solid android:color="#88000000" />
</shape>

4.定义drawable旋转动画

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<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toDegrees="720">
    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="15"
        android:useLevel="false">
        <gradient
            android:centerColor="#c6c6c6"
            android:centerY="0.50"
            android:endColor="#c6c6c6"
            android:startColor="#55c6c6c6"
            android:type="sweep"
            android:useLevel="false" />
    </shape>
</animated-rotate>

5.定义一个Style

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<style name="CustomDialog" parent="Theme.AppCompat.Dialog">
       <item name="android:backgroundDimEnabled">false</item>
       <item name="android:windowBackground">@android:color/transparent</item>
   </style>

6.代码中使用

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if (loading == null) {
	loading = new LoadingView(this, R.style.CustomDialog);
	loading.show(); // 显示
      }

取消显示：loading.dismiss();

ok~终于完了…