Question

我的自定义进度栏不显示。我在我的活动中为其设置动画，并为其使用可绘制资源文件。这是我的代码。

Activity.java

  ProgressBar progressBar;

   @Override
   protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
      progressBar =  findViewById(R.id.progressBar);
    ObjectAnimator animation = ObjectAnimator.ofInt(progressBar, "progress", 
   0, 500); 
    animation.setDuration(5000); // in milliseconds
    animation.setInterpolator(new DecelerateInterpolator());
    animation.start();

activity.xml

      <ProgressBar
    android:id="@+id/progressBar"
    style="?android:attr/progressBarStyleHorizontal"

    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:max="500"
    android:progress="0"
    android:progressDrawable="@drawable/circular"
    app:layout_constraintBottom_toBottomOf="@+id/relativeLayout"
    app:layout_constraintEnd_toEndOf="@+id/relativeLayout"
    app:layout_constraintHorizontal_bias="0.475"
    app:layout_constraintStart_toStartOf="@+id/relativeLayout"
    app:layout_constraintTop_toTopOf="@+id/relativeLayout"
    app:layout_constraintVertical_bias="0.153" />

drawableResource.xml

     <?xml version="1.0" encoding="utf-8"?>
        <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:useLevel="true"
        android:indeterminate="true"
        android:innerRadiusRatio="2.3"
        android:shape="ring"
        android:thickness="3.8sp" >
        <solid android:color="@color/colorPrimary" />
     </shape>

want this kind of progress bar

Answer 1

不确定您的自定义代码为什么不起作用，但是该代码对您的activity.java起作用，因此您的XML肯定是问题所在。这是一个有效的进度条。如果您想添加百分比，建议您在这里查看：https://github.com/ylyc/circular_progress_bar。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ProgressBar android:indeterminate="true"
        android:useLevel="true"
        android:layout_centerInParent="true"
        android:indeterminateDrawable="@drawable/circular"
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:id="@+id/progressBar1"></ProgressBar>

</RelativeLayout>

Android progressBar未显示

1 个答案: