Android-Bug收集
阿新 • • 發佈：2019-01-02
- java.lang.IllegalStateException: RecyclerView has no LayoutManager
at android.support.v7.widget.RecyclerView.generateLayoutParams(RecyclerView.java:3256)
at android.view.LayoutInflater.inflate(LayoutInflater.java:499)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
解決方式：給RecycleView設定LayoutManger，recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
如果有對RecycleView新增HeaderView，該設定請放到新增載入Header佈局之前
2.
FATAL EXCEPTION: main
Process: com.fotoable.torchflashlight, PID: 5764
java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class 解決方法：可能是新增MultiDex分包，但未初始化的原因，在Application中初始化即可。
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(base);
}3.
此問題是使用系統DownloadManager導致的
因為我設定了下載通知不可見；
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
java.lang.SecurityException: Invalid value for visibility: 2
at android.os.Parcel.readException(Parcel.java:1546)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:476)
at android.content.ContentResolver.insert(ContentResolver.java:1260)
at android.app.DownloadManager.enqueue(DownloadManager.java:1336)解決方法：
新增許可權即可
<!--DownloadManager下載時不顯示Notification-->
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />4.
問題：使用 Collections.sort導致出現的異常
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.TimSort.mergeLo(TimSort.java:743)
at java.util.TimSort.mergeAt(TimSort.java:479)
at java.util.TimSort.mergeCollapse(TimSort.java:406)
at java.util.TimSort.sort(TimSort.java:210)
at java.util.TimSort.sort(TimSort.java:169)
at java.util.Arrays.sort(Arrays.java:2010)
at java.util.Collections.sort(Collections.java:1883)程式碼：
Collections.sort(appInfoList, new Comparator<AppInfo>() {
@Override
public int compare(AppInfo o1, AppInfo o2) {
int value = (int) (o1.getLastUpdateTime() - o2.getLastUpdateTime());
int state = 0;
if (value > 0) {
state = 1;
} else if (value < 0) {
state = -1;
}
Log.e("AppList", "value:::::" + state);
return state;
}
});解決方法：
網上說設定：
System.setProperty(“java.util.Arrays.useLegacyMergeSort”, “true”);
好像不好使啊。
解決後的程式碼是，型別轉換導致：
long value = (o1.getLastUpdateTime() - o2.getLastUpdateTime());5.
異常：使用了PagerAdapter出現的問題
FATAL EXCEPTION: main
Process: com.xxx.youtube.music, PID: 22803
java.lang.UnsupportedOperationException: Required method instantiateItem was not overridden
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:178)
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:111)出錯程式碼：
@Override
public Object instantiateItem(ViewGroup container, int position) {
View itemView = View.inflate(context, R.layout.view_home_banner_item, null);
ImageView coverIv = (ImageView) itemView.findViewById(R.id.cover_iv);
int rid = bannerList.get(position % bannerList.size());
coverIv.setImageResource(rid);
container.addView(itemView);
return super.instantiateItem(container, position);
}解決方法：
return super.instantiateItem(container, position);改為：
return itemView;不認真導致的錯誤