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首页 > 解决方案 > android.graphics.drawable.AdaptiveIconDrawable 无法转换为 android.graphics.drawable.BitmapDrawable 错误

android - android.graphics.drawable.AdaptiveIconDrawable 无法转换为 android.graphics.drawable.BitmapDrawable 错误

问题描述

在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。

我无法想象为什么会出现此错误，因为在下面的错误日志中提到的文件中（MainActivity和BaseActivity），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)

此错误消息的“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，但自适应图标也无法正常工作......

在这两种情况下都会引发错误的行：

super.onCreate(savedInstanceState);

标签： androidandroid-8.0-oreo

解决方案

在 ATE.java 文件中，实现这个

@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()));

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