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我有一個Listview包含文本和綠色正方形的活動。我終於改變了主意，並修改了我的代碼以使用片段而不是活動。但隨後我的文字顏色發生了變化，我再也看不到綠色方塊了。我沒有改變我的列表代碼或文本的顏色，所以我不明白髮生了什麼。從活動切換到片段後，用戶界面外觀發生變化
謝謝你的幫助。
MainActivity僅作爲一個片段容器：
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.ll_container);
if (fragment == null) {
fragment = new PollutionLevelsFragment();
fm.beginTransaction()
.add(R.id.ll_container, fragment)
.commit();
}
}
}
MainActivity佈局
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
片段類
public class PollutionLevelsFragment extends Fragment implements PollutionLevelsFragmentMVP.View {
private PollutionLevelAdapter plAdapter;
@BindString(R.string.city)
String city;
@BindString(R.string.aqicn_token)
String authToken;
@BindView(R.id.lv_pollution_levels)
ListView lvPollutionLevels;
@Inject
PollutionLevelsFragmentMVP.Presenter presenter;
private ViewModel pollutionData;
private ArrayList<String> testbidon;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_pollution_levels, container, false);
ButterKnife.bind(this,view);
// Construct the data source
ArrayList<PollutionLevel> arrayOfPollutionLevel = new ArrayList<>();
// Create the adapter to convert the array to views
plAdapter = new PollutionLevelAdapter(getActivity().getApplicationContext(), arrayOfPollutionLevel);
lvPollutionLevels.setAdapter(plAdapter);
return view;
}
@Override
public void onStart() {
super.onStart();
presenter.setView(this);
presenter.loadData(city, authToken);
}
@Override
public void onStop() {
super.onStop();
presenter.rxUnsubscribe();
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
((App) getActivity().getApplication()).getComponent().inject(this);
}
@Override
public void updateData(ViewModel viewModel) {
this.pollutionData = viewModel;
ArrayList<PollutionLevel> pollutionLevels = viewModel.getAllPolluants();
for(PollutionLevel pl : pollutionLevels) {
plAdapter.add(pl);
}
}
}
片段佈局
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView android:id="@+id/lv_pollution_levels"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
爲ListView
public class PollutionLevelAdapter extends ArrayAdapter<PollutionLevel> {
@BindView(R.id.tv_name)
TextView tvName;
@BindView(R.id.tv_value)
TextView tvValue;
public PollutionLevelAdapter(Context context, ArrayList<PollutionLevel> pollutionLevels) {
super(context,0,pollutionLevels);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item_pollution, parent, false);
}
View view = convertView;
ButterKnife.bind(this,view);
PollutionLevel pollutionLevel = getItem(position);
tvName.setText(pollutionLevel.getName());
tvValue.setText(pollutionLevel.getValue());
return view;
}
}
我的列表項一個ArrayAdapter
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv_warning"
android:layout_width="20dp"
android:layout_height="20dp"
app:srcCompat="@drawable/rectangle"/>
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:gravity="center_vertical"
android:text="TextView"/>
<TextView
android:id="@+id/tv_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:gravity="center_vertical"
android:text="TextView"/>
這是佈局的代碼，呈現Activity類正確的列表視圖（所以之前我從一個活動到一個片段）。我沒有把ListView的適配器的代碼在這裏，因爲它並沒有改變：
活動
public class PollutionLevelsActivity extends AppCompatActivity implements PollutionLevelsActivityMVP.View {
private PollutionLevelAdapter plAdapter;
@BindString(R.string.city)
String city;
@BindString(R.string.aqicn_token)
String authToken;
@BindView(R.id.lv_pollution_levels)
ListView lvPollutionLevels;
@Inject
PollutionLevelsActivityMVP.Presenter presenter;
private ViewModel pollutionData;
private ArrayList<String> testbidon;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
((App) getApplication()).getComponent().inject(this);
ButterKnife.bind(this);
// Construct the data source
ArrayList<PollutionLevel> arrayOfPollutionLevel = new ArrayList<>();
// Create the adapter to convert the array to views
plAdapter = new PollutionLevelAdapter(this, arrayOfPollutionLevel);
lvPollutionLevels.setAdapter(plAdapter);
}
@Override
protected void onStart() {
super.onStart();
presenter.setView(this);
presenter.loadData(city, authToken);
}
@Override
protected void onDestroy() {
super.onDestroy();
presenter.rxUnsubscribe();
}
@Override
public void updateData(ViewModel viewModel) {
this.pollutionData = viewModel;
ArrayList<PollutionLevel> pollutionLevels = viewModel.getAllPolluants();
for(PollutionLevel pl : pollutionLevels) {
plAdapter.add(pl);
}
}
}
佈局
<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.livos.citypollution.pollutionlevels.PollutionLevelsActivity">
<ListView
android:id="@+id/lv_pollution_levels"
android:layout_width="368dp"
android:layout_height="495dp"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
我剛剛解決了通過改變這個'a pp：srcCompat =「@ drawable/rectangle」'這個android：src =「@ drawable/rectangle」'。我仍然有問題的文字顏色。 – Laurent