我需要有关片段内部片段的帮助,实际上我在按“后退”按钮时遇到问题。应用程序主屏幕上有按钮,并在每个按钮视图上按,然后用新片段替换(该片段包含在另一个片段内),通过按button1替换片段,动态添加/替换片段的工作正常,但按按钮时也会发生同样的情况,但是如果按该按钮再次出现异常:
"Duplicate id 0x7f05000a, tag null, or parent id 0x7f050009 with
another fragment for com........ fragmentname"
表示已经添加了片段或内部片段,而我正尝试再次添加它们,任何人都知道如何使用片段内部的片段并可以毫无问题地来回移动,谢谢您的支持。
MainActivity,动态添加和替换片段。
public class FragmentInsideFragmentTestActivity extends Activity {
private Button button1;
private Button button2;
private Button button3;
private Button button4;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button1 =(Button) this.findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);
}
});
button2 =(Button) this.findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);
}
});
button3 =(Button) this.findViewById(R.id.button3);
button3.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);
}
});
button4 =(Button) this.findViewById(R.id.button4);
button4.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);
}
});
}
public void onButtonClick(View v) {
Fragment fg;
switch (v.getId()) {
case R.id.button1:
fg=FirstFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button2:
fg=SecondFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button3:
fg=FirstFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button4:
fg=SecondFragment.newInstance();
replaceFragment(fg);
break;
}
}
private void replaceFragment(Fragment newFragment) {
FragmentTransaction trasection = getFragmentManager().beginTransaction();
if(!newFragment.isAdded()) {
try {
//FragmentTransaction trasection =
getFragmentManager().beginTransaction();
trasection.replace(R.id.linearLayout2, newFragment);
trasection.addToBackStack(null);
trasection.commit();
} catch (Exception e) {
// TODO: handle exception
// AppConstants.printLog(e.getMessage());
} else {
trasection.show(newFragment);
}
}
}
这是布局:main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button1" />
<Button
android:id="@+id/button2"
android:text="Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/button3"
android:text="Button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/button4"
android:text="Button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" />
</LinearLayout>
希望我设法解决我的问题。