Android中的自定义进度条？

Question

我还没有弄清楚如何做到这一点.我的进度条应该是云的形状.有人可以指导我一本书,教程或只是给出正确的一步一步的方法吗？

感谢您的时间.

Answer 1

如此处所示,您可以使用图像视图来获得自定义滚动条效果.

该示例中自定义进度条的布局XML为:

<RelativeLayout android:id="@+id/RelativeLayout01"
    android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"
    android:gravity="center" android:layout_height="wrap_content"
    android:paddingLeft="30sp" android:paddingRight="30sp">
    <ImageView android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:src="@drawable/progress_1"
        android:id="@+id/imgOne" android:tag="1"></ImageView>
    <ImageView android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:src="@drawable/progress_2"
        android:id="@+id/imgTwo" android:layout_toRightOf="@id/imgOne"
        android:tag="2"></ImageView>
    <ImageView android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:src="@drawable/progress_3"
        android:id="@+id/imgThree" android:layout_toRightOf="@id/imgTwo"
        android:tag="3"></ImageView>
    <TextView android:id="@+id/TextView01" android:layout_height="wrap_content"
        android:layout_toRightOf="@id/imgThree" android:layout_width="wrap_content"
        android:layout_alignTop="@id/imgThree" android:layout_alignBottom="@id/imgThree"
        android:gravity="bottom" android:text="Please Wait..."></TextView>
</RelativeLayout>

然后他在类文件中创建了一个图像列表:

/**
 * Loads the layout and sets the initial set of images
 */
private void prepareLayout() {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.myprogressbar, null);
    addView(view);

    imageHolders = new ArrayList<ImageView>();
    imageHolders.add((ImageView) view.findViewById(R.id.imgOne));
    imageHolders.add((ImageView) view.findViewById(R.id.imgTwo));
    imageHolders.add((ImageView) view.findViewById(R.id.imgThree));

    // Prepare an array list of images to be animated
    images = new ArrayList<String>();

    images.add("progress_1");
    images.add("progress_2");
    images.add("progress_3");
    images.add("progress_4");
    images.add("progress_5");
    images.add("progress_6");
    images.add("progress_7");
    images.add("progress_8");
    images.add("progress_9");
}

然后他启动一个休眠0.3秒的线程并调用处理程序,handler.sendEmptyMessage(0);最后在Handler中执行其余的图像工作:

@Override
public void handleMessage(Message msg) {
    int currentImage = 0;
    int nextImage = 0;
    // Logic to change the images
    for (ImageView imageView : imageHolders) {
        currentImage = Integer.parseInt(imageView.getTag().toString());
        if (currentImage < 9) {
            nextImage = currentImage + 1;
        } else {
            nextImage = 1;
        }
        imageView.setTag("" + nextImage);
        imageView.setImageResource(getResources().getIdentifier(
                images.get(nextImage - 1), "drawable",
                "com.beanie.example"));
    }
    super.handleMessage(msg);
}

还可以看看这里和这里.