Android将自定义图标设置为标记在Marshmallow中返回null

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

private static final int REQUEST_CODE = 1;

// 请求权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
        != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
            REQUEST_CODE);
}

// 处理权限请求的结果
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    if (requestCode == REQUEST_CODE) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 权限已授予，可以设置自定义图标
        } else {
            // 权限被拒绝，无法设置自定义图标
        }
    }
}

// 获取应用程序的包名
String packageName = getApplicationContext().getPackageName();

// 获取自定义图标的文件路径
String iconPath = Environment.getExternalStorageDirectory() + "/custom_icon.png";

// 创建ComponentName对象
ComponentName componentName = new ComponentName(packageName, packageName + ".MainActivity");

// 创建ShortcutInfo对象
ShortcutInfo shortcutInfo = new ShortcutInfo.Builder(getApplicationContext(), "shortcut_id")
        .setShortLabel("Shortcut")
        .setIcon(Icon.createWithBitmap(BitmapFactory.decodeFile(iconPath)))
        .setIntent(new Intent(Intent.ACTION_MAIN).setComponent(componentName))
        .build();

// 创建ShortcutManager对象
ShortcutManager shortcutManager = getSystemService(ShortcutManager.class);

// 动态添加快捷方式
shortcutManager.setDynamicShortcuts(Arrays.asList(shortcutInfo));