android.graphics.drawable.AdaptiveIconDrawable无法强制转换为android.graphics.drawable.BitmapDrawable错误

Question

当我的应用程序在启动时崩溃时尝试实现自适应图标时出现此错误...

我无法想象为什么我会收到此错误,因为在下面的错误日志(MainActivity和BaseActivity)中提到的文件中,我不同时使用AdaptiveIconDrawable和BitmapDrawable...

2018-04-28 16:50:17.014 31282-31282/de.markustippner.wondermusic2 E/AndroidRuntime: FATAL EXCEPTION: main
    Process: de.markustippner.wondermusic2, PID: 31282
    java.lang.RuntimeException: Unable to start activity ComponentInfo{de.markustippner.wondermusic2/de.markustippner.wondermusic2.activities.MainActivity}: java.lang.ClassCastException: android.graphics.drawable.AdaptiveIconDrawable cannot be cast to android.graphics.drawable.BitmapDrawable
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2892)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3027)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:101)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:73)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
     Caused by: java.lang.ClassCastException: android.graphics.drawable.AdaptiveIconDrawable cannot be cast to android.graphics.drawable.BitmapDrawable
        at com.afollestad.appthemeengine.ATE.applyTaskDescription(ATE.java:259)
        at com.afollestad.appthemeengine.ATE.preApply(ATE.java:128)
        at com.afollestad.appthemeengine.ATEActivity.onCreate(ATEActivity.java:22)
        at de.markustippner.wondermusic2.activities.BaseActivity.onCreate(BaseActivity.java:44)
        at de.markustippner.wondermusic2.activities.MainActivity.onCreate(MainActivity.java:137)
        at android.app.Activity.performCreate(Activity.java:7117)
        at android.app.Activity.performCreate(Activity.java:7108)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1262)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2867)

这个错误消息的"有趣"部分是,当我删除"mipmap-anydpi-v26"文件夹时,我的应用程序不再崩溃,但随后自适应图标也无法运行...

在这两种情况下,抛出错误的行:

super.onCreate(savedInstanceState);

Answer 1

在ATE.java文件中,实现此目的

@NonNull
static private Bitmap getBitmapFromDrawable(@NonNull Drawable drawable) {
    final Bitmap bmp = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    final Canvas canvas = new Canvas(bmp);
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);
    return bmp;
}

并改变

if (icon == null)
        icon = ((BitmapDrawable) activity.getApplicationInfo().loadIcon(activity.getPackageManager())).getBitmap();

至

if (icon == null)
        icon = getBitmapFromDrawable(activity.getApplicationInfo().loadIcon(activity.getPackageManager()));

Answer 2

看来您正在使用App Theme Engine，它会尝试将您的应用程序图标用作位图。但从 Android 8.0 开始，您可以设置自适应图标，该图标不是位图，因此应用程序主题引擎会在其上崩溃。

此问题已在此处报告，但尚未修复（并且可能不会，因为它已经两年没有看到任何更新）。

您也许可以通过分叉项目并将有问题的部分更改为不需要位图图标来自行修复此问题。或者，使用另一个主题引擎。