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你好我新的android工作室，我可能犯了一個愚蠢的錯誤，我找不到。 因此，基本上我做了一個標籤式的活動，所有的日子，我想做一個清單（我想做一個自定義的時間表應用程序，將有我所做的每日活動）。我ListView不顯示:(。什麼有我做錯了Android studio listview不顯示
EditActivity類代碼：https://hastebin.com/amajusutid.java
package com.timemanagement.restrictedpower.timemanagement;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class EditActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_edit, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static String day(int id){
switch (id) {
case 1:
return "Monday";
case 2:
return "Tuesday";
case 3:
return "Wednesday";
case 4:
return "Thirsday";
case 5:
return "Friday";
case 6:
return "Saturday";
case 7:
return "Sunday";
}
return null;
}
public static class PlaceholderFragment extends Fragment {
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_edit, container, false);
ListView lv = (ListView) v.findViewById(R.id.Activities);
List<String> fruits_list = new ArrayList<String>();
fruits_list.add("Apple");
fruits_list.add("Strawberry");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, fruits_list);
lv.setAdapter(arrayAdapter);
lv.invalidateViews();
View rootView = inflater.inflate(R.layout.fragment_edit, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.Day);
int id = getArguments().getInt(ARG_SECTION_NUMBER);
String day = day(getArguments().getInt(ARG_SECTION_NUMBER));
textView.setText(day);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
return rootView;
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show 3 total pages.
return 7;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
case 2:
return "SECTION 3";
case 3:
return "SECTION 4";
case 4:
return "SECTION 5";
case 5:
return "SECTION 6";
case 6:
return "SECTION 7";
}
return null;
}
}
}
XML代碼：https://hastebin.com/yapepideme.xml
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#1234">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/Activities"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
style="@android:style/Widget.DeviceDefault.ExpandableListView" />
</LinearLayout>
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_height="60dp"
android:layout_width="match_parent">
<TextView
android:text="TextView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textSize="5mm"
android:id="@+id/Day" />
<TextView
android:id="@+id/section_label"
android:layout_width="match_parent"
android:layout_height="0dp"
android:textColor="#FFCC91"
android:textSize="6mm"
android:gravity="center"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
我想你列表diplaying但你的ListView項的背景顏色和文字顏色相同。檢查這個。點擊或長按列表視圖 –
爲什麼你要採取查看rootView = inflater.inflate（R.layout.fragment_edit，container，false）; rootView？你已經有了這個視圖v = inflater.inflate（R.layout.fragment_edit，container，false）; 所以只需返回v並刪除rootView –