我有一个两窗格布局，按钮位于左侧。当按下按钮时，其相应的片段会显示在右侧。有时片段会重叠，但这是一个间歇性问题。我无法一直复制它，但它确实发生了
public void onClick(View v) {
switch (v.getId()) {
case R.id.imageButtonSettingsManageBooks:
SettingsManageBooksFragment mbFragment = new SettingsManageBooksFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, mbFragment).addToBackStack(null).commit();
mImgFragmentTitle.setImageResource(R.drawable.manage_my_books);
this.getSupportFragmentManager().executePendingTransactions();
break;
case R.id.imageButtonSettingsPurchaseHistory:
SettingsPurchaseHistoryFragment phFragment = new SettingsPurchaseHistoryFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, phFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.purchase_history);
this.getSupportFragmentManager().executePendingTransactions();
break;
case R.id.imageButtonSettingsAudio:
SettingsAudioFragment aFragment = new SettingsAudioFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, aFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.audio);
this.getSupportFragmentManager().executePendingTransactions();
break;
case R.id.imageButtonSettingsRestore:
SettingsRestoreFragment rFragment = new SettingsRestoreFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, rFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.restore);
this.getSupportFragmentManager().executePendingTransactions();
break;
case R.id.imageButtonSettingsCopyright:
SettingsCopyrightFragment cFragment = new SettingsCopyrightFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, cFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.copyright);
this.getSupportFragmentManager().executePendingTransactions();
break;
case R.id.imageButtonSettingsAbout:
SettingsAboutFragment abFragment = new SettingsAboutFragment();
getFragmentManager().beginTransaction().replace(R.id.setting_detail_container2, abFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.about);
this.getSupportFragmentManager().executePendingTransactions();
break;
看起来是因为我正在用可能导致重叠的新片段替换每个片段。有没有办法在提交新片段之前清除所有片段？
正如 StackOverflowed 上面提到的，这是一个间歇性问题。我找到了一种解决此问题的方法，方法是编写自己的代码，在提交新片段之前删除任何现有片段。下面是我的代码：
fragmentManager = getFragmentManager();
ft = fragmentManager.beginTransaction();
mbFragment = new SettingsManageBooksFragment();
ft.replace(R.id.setting_detail_container2, mbFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.manage_my_books);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.imageButtonSettingsManageBooks:
if (mPurchaseHistory == true) {
ft.remove(phFragment);
Log.d(TAG, "REMOVING PURCHASE HISTORY FRAG");
} else if (mAudio == true) {
ft.remove(aFragment);
Log.d(TAG, "REMOVING AUDIO FRAG");
} else if (mRestore == true) {
ft.remove(rFragment);
Log.d(TAG, "REMOVING RESTORE FRAG");
} else if (mCopyright == true) {
ft.remove(cFragment);
Log.d(TAG, "REMOVING COPYRIGHT FRAG");
} else if (mAbout == true) {
ft.remove(abFragment);
Log.d(TAG, "REMOVING ABOUT FRAG");
}
ft = fragmentManager.beginTransaction();
mbFragment = new SettingsManageBooksFragment();
ft.replace(R.id.setting_detail_container2, mbFragment).commit();
mImgFragmentTitle.setImageResource(R.drawable.manage_my_books);
mManageBooks = true;
mPurchaseHistory = false;
mAudio = false;
mRestore = false;
mCopyright = false;
mAbout = false;
break;
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