java - 从进度对话框中删除背景

Question

我在我的应用程序中使用自定义进度对话框。如下图所示。我想编辑两件事。首先，删除圆圈后面出现的黑色背景。其次，增加圆圈的体积并更改其颜色。

这就是风格

<style name="CustomDialog" parent="@android:style/Theme.Dialog">
        <item name="android:textColor">#FF4081</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:background">@android:color/transparent</item>
        <item name="android:windowFrame">@android:color/transparent</item>
    </style>

这是我的代码

dialog = new ProgressDialog(activity.this,R.style.CustomDialog);
            dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
            dialog.show();

Answer 1

ProgressDialog 已弃用。您可以使用警报对话框创建自定义进度对话框。

public static AlertDialog showProgressBar(Context context){
    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    @SuppressLint("InflateParams") View view = inflater.inflate(R.layout.layout_custom_progress_bar, null);
    builder.setView(view);
    AlertDialog dialog = builder.create();
    dialog.show();
    return dialog;
}

然后您可以实例化该对话框，以便手动将其关闭。像这样使用它。

AlertDialog dialog = showProgressBa(this); // this will automatically show the custom progress bar
// to dismiss
dialog.dismiss();

这是您的进度对话框的自定义布局。

//layout_custom_progress_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/transparent">

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="20dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <ProgressBar
        android:id="@+id/progress_bar"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginStart="16dp"
        android:indeterminateDrawable="@drawable/progress_bar"
        android:max="100"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

您的进度条可绘制。您可以通过更改 android:centerColor android:endColor android:startColor

的值来更改颜色

// progress_bar
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="200"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="1080" >

<shape
android:innerRadius="18dp"
android:shape="ring"
android:thickness="4dp"
android:useLevel="false" >

<size
    android:height="48dp"
    android:width="48dp" />

<gradient
    android:centerColor="@color/colorPrimary"
    android:centerY="0.5"
    android:endColor="@color/colorWhite"
    android:startColor="@color/colorPrimary"
    android:type="sweep"
    android:useLevel="false" />

</shape>
</rotate>