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許多人對修復片段有疑問，但我的困惑可能基於片段API的演變本質，或者我只是誤解了它們。我正在修剪此代碼以顯示嘗試如何使用片段在大屏幕上顯示多個佈局或在小屏幕上使用按鈕轉到其他佈局的單個佈局。我的日誌的主要部分是沒有找到片段的視圖
12-03 21:17:29.711: E/FragmentManager(13440): No view found for id 0x7f090046
(com.ruleagents.rpgsheet:id/main_fragment) for fragment MainFragment{4053b368 #0 ....
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.ruleagents.rpgsheet/com.ruleagents.rpgsheet.SheetActivity}:
java.lang.IllegalArgumentException: No view found for id 0x7f090046
(com.ruleagents.rpgsheet:id/main_fragment) for fragment MainFragment{4053b368 #0 id=0x7f090046}
12-03 21:17:29.721: E/AndroidRuntime(13440): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1821)
我activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="@+id/container"
android:layout_width="0px"
android:layout_height="match_parent"
tools:context="com.ruleagents.rpgsheet.MainActivity"
tools:ignore="MergeRootFrame" />
</RelativeLayout>
attribute_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/linear1">
... nested layout that works independently
</LinearLayout>
main_fragment.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:id="@+id/main_fragment" >
<LinearLayout
...
</LinearLayout>
<LinearLayout
...
</LinearLayout>
<LinearLayout
...
</RelativeLayout>
用我MainActivity.java如：
package com.ruleagents.rpgsheet;
import java.io.BufferedReader;
...
public class MainActivity extends FragmentActivity { //ActionBarActivity {
SectionsPagerAdapter mSectionsPagerAdapter;
FragmentManager fragmentManager; // = getFragmentManager();
AttributeFragment af = new AttributeFragment();
MainFragment mf = new MainFragment();
String characterClass, level, att1, att2, att3;
//other local variables
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_fragment);
Configuration config = getResources().getConfiguration();
af.setArguments(getIntent().getExtras());
mf.setArguments(getIntent().getExtras());
fragmentManager = getSupportFragmentManager();
if (config.orientation == Configuration.ORIENTATION_LANDSCAPE) {
fragmentManager.beginTransaction().add(R.id.main_fragment, mf).commit();
fragmentManager.beginTransaction().add(R.layout.attribute_fragment, af).commit();
}else{
System.err.println("AAA creating portrait view");
fragmentManager.beginTransaction().add(R.id.container, mf).commit();
}
}
public void onMainButton(View view) {
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.id.main_fragment, mf);
ft.addToBackStack(null);
ft.commit();
}
public void onAttributesButton(View view) {
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.layout.attribute_fragment, af);
ft.addToBackStack(null);
ft.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
// Unused PlaceholderFragment method ...
// unused FragmentPageAdapter ...
// local methods
}
我MainFragment.java
package com.ruleagents.rpgsheet;
... imports
public class MainFragment extends Fragment {
public MainFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
return inflater.inflate(R.layout.main_fragment, container, false);
}
@Override
public void onPause() {
super.onPause();
}
}
我SheetActivity.java
package com.ruleagents.rpgsheet;
... imports
public class SheetActivity extends ActionBarActivity {
// Local variables...
FragmentManager fragmentManager; // = getFragmentManager();
AttributeFragment af = new AttributeFragment();
MainFragment mf = new MainFragment();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.err.println("AAA in onCreate of SheetActivity");
Configuration config = getResources().getConfiguration();
//FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
//setContentView(R.layout.activity_main);
//setContentView(R.layout.whole_sheet);
System.err.println("AAA got config");
af.setArguments(getIntent().getExtras());
mf.setArguments(getIntent().getExtras());
fragmentManager = getSupportFragmentManager();
System.err.println("AAA got frag manager");
if (config.orientation == Configuration.ORIENTATION_LANDSCAPE) {
fragmentManager.beginTransaction().add(R.id.container, mf).commit();
fragmentManager.beginTransaction().add(R.id.container, af).commit();
}else{
System.err.println("AAA creating portrait view");
fragmentManager.beginTransaction().add(R.id.main_fragment, mf).commit();
}
}
public void onMainButton(View view) {
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.id.main_fragment, mf);
ft.addToBackStack(null);
ft.commit();
}
public void onSkillsButton(View view) {
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.addToBackStack(null);
ft.commit();
}
public void onAttributesButton(View view) {
android.support.v4.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.layout.attribute_fragment, af);
ft.addToBackStack(null);
ft.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
// Local methods ...
// Unused PlaceholderFragment ...
// Unused SectionsPagerAdapter
}