小编Wid*_*ide的帖子

如何在我的Android应用程序中实现像许多音乐播放器一样的播放/暂停动画？我尝试了很多解决方案,但都没有效果.

这是我到目前为止所做的:MainActivity.java:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageButton = (ImageButton) findViewById(R.id.imageView);
        imageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Animatable animatable = (Animatable) imageButton.getDrawable();
                animatable.start();
            }
        });
    }

activity_main.xml中:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="widefide.com.vectoranimation01.MainActivity">


    <ImageButton
        android:layout_width="wrap_content"
        style="@style/Widget.AppCompat.Button.Borderless"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:id="@+id/imageView"
        android:src="@drawable/play_pause"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

play_pause.xml:

<?xml version="1.0" encoding="utf-8"?>
<animated-selector xmlns:android="http://schemas.android.com/apk/res/android"
android:constantSize="true">
<item
    android:drawable="@drawable/pause_ic"
    android:state_checked="true"
    android:id="@+id/pause_state" />
<item
    android:drawable="@drawable/play_ic"
    android:id="@+id/play_state" />
<transition android:fromId="@id/play_state" android:toId="@id/pause_state" android:reversible="true">
    <animated-vector android:drawable="@drawable/play_ic">
        <target …

如何为调色板的样本添加透明度值？就像我将颜色(swatch.getRGB())添加到线性布局一样,它显示纯色.而且我不想使用alpha,因为它会使布局中的其他项目也变得透明.

我的代码片段:

Palette palette = Palette.from(myBitmap).generate();
Palette.Swatch swatch1 = palette.getDarkVibrantSwatch();
int color = swatch1.getRgb();
thatLayout.setBackgroundColor(color)