使用片段破坏的活动
问题描述:
我有一个ListView在ListView.class
,当用户点击一个项目(假设位置= 0的项目)Fragment6应该打开。使用片段破坏的活动
此外,我有一个HandleListClick.class
获取位置(例如位置= 0),然后使用switch
来打开一个片段,但我得到一个错误。
java.lang.IllegalStateException:活动遭到破坏
我该如何处理这个恼人的问题?我的活动在Manifest中声明。
这是我ListView.class
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// ListView Clicked item index
int itemPosition = position;
// ListView Clicked item value
String itemValue = (String) listView.getItemAtPosition(position);
if (position==0){
HandleListClick handleListClick = new HandleListClick();
handleListClick.getItemPosition(0);
}
}
这里是我的handleListClick.class
public class HandleListClick extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_handle_list_click);
}
public void getItemPosition(int position) {
switch (position) {
case 0:
Fragment6 frag6 = null;
frag6 = new Fragment6();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.framelayout, frag6)
.commit();
}
}
}
这里是我的Fragment6.java
public class Fragment6 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragmentdescrip6, container,false);
return v;
// ViewGroup rootView = (ViewGroup) inflater.inflate(
// R.layout.fragmentdescrip6, container, false);
// return rootView;
}
}
这里是activity_handle_list_click.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.user.app.HandleListClick">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id= "@+id/framelayout"
>
</FrameLayout>
</android.support.constraint.ConstraintLayout>
这里是fragmentdescrip6.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frag6"
>
<TextView
android:id="@+id/textfrag6label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="foo"
android:textStyle="bold"
android:textColor="#FFFF4444"
android:textSize="20dp"
android:layout_marginTop="17dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:id="@+id/textfrag6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/textfrag6label"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="33dp"
android:textStyle="bold"
android:text="some Text" />
</RelativeLayout>
答
尝试这种方式
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// ListView Clicked item index
int itemPosition = position;
// ListView Clicked item value
String itemValue = (String) listView.getItemAtPosition(position);
if (position==0){
Intent intent = new Intent(CurrentActivity.this, HandleListClick.class);
intent.putExtra("POSITION", position);
startActivity(intent);
}
/* HandleListClick handleListClick = new HandleListClick();
handleListClick.getItemPosition(0);*/
}
}
更改活动代码
public class HandleListClick extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_handle_list_click);
Intent intent = getIntent();
int pos = intent.getIntExtra("POSITION",0);
getItemPosition(pos);
}
public void getItemPosition(int position) {
switch (position) {
case 0:
Fragment6 frag6 = null;
frag6 = new Fragment6();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.framelayout, frag6)
.commit();
}
}
}
谢谢!它终于奏效了。我非常感谢 – Blnpwr
但是如果我的位置= 1,会发生什么?然后'int pos = intent.getIntExtra(“POSITION”,0);'不起作用,对吧? – Blnpwr
如果position == 1,那么HandleListClick类的onCreate将不会被调用,因为我们只在onItemClick()中放置了位置== 0的条件。 –