Android 如何将具有ListView的活动转换为片段?
我创建了一个带有Android 如何将具有ListView的活动转换为片段?,android,listview,android-fragments,android-studio,Android,Listview,Android Fragments,Android Studio,我创建了一个带有活动的列表视图;但是我需要创建一个带有片段的列表视图 public class Main extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); getSupportFragmentMan
活动的列表视图
;但是我需要创建一个带有片段的列表视图
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportFragmentManager().beginTransaction().
replace(R.id.fragmentContainer, new MyListFragment()).commit();
}
}
这是我的活动的屏幕截图
:
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportFragmentManager().beginTransaction().
replace(R.id.fragmentContainer, new MyListFragment()).commit();
}
}
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportFragmentManager().beginTransaction().
replace(R.id.fragmentContainer, new MyListFragment()).commit();
}
}
这是相应的代码:
public class Main extends ActionBarActivity implements
android.widget.CompoundButton.OnCheckedChangeListener {
ListView lv;
ArrayList<Planet> planetList;
PlanetAdapter plAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv = (ListView) findViewById(R.id.listview);
displayPlanetList();
}
private void displayPlanetList() {
planetList = new ArrayList<Planet>();
planetList.add(new Planet("Margherita", 6, "€"));
planetList.add(new Planet("Diavola", 7,"€"));
planetList.add(new Planet("Bufalina", 5,"€"));
planetList.add(new Planet("Marinara", 5,"€"));
planetList.add(new Planet("Viennese", 4,"€"));
plAdapter = new PlanetAdapter(planetList, this);
lv.setAdapter(plAdapter);
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int pos = lv.getPositionForView(buttonView);
if (pos != ListView.INVALID_POSITION) {
Planet p = planetList.get(pos);
p.setSelected(isChecked);
/*Toast.makeText(
this,
"Clicked on Planet: " + p.getName() + ". State: is "
+ isChecked, Toast.LENGTH_SHORT).show();*/
}
}
public void showResult(View v) {
String result = "Selected Product are :";
int totalAmount=0;
for (Planet p : plAdapter.getBox()) {
if (p.selected){
result += "\n" + p.name+" "+p.distance+"€"+"q.tà :"+p.getQuantità();
//if (p.quantità.equals("") && p.quantità.equals(null) ){
System.out.println("leggo questo record:"+p.name + " " + p.distance + " " + p.quantità );
System.out.println("leggo questo p.getquatità :"+p.quantità );
//}
//else{
System.out.println("leggo questo in p.quantità: "+p.getQuantità());
int quantitaInt= Integer.parseInt(p.getQuantità() );
totalAmount+=p.distance * quantitaInt;
//}
}
}
// Toast.makeText(this, result+"\n"+"Total Amount:="+totalAmount, Toast.LENGTH_LONG).show();
//Integer.toString(totalAmount);
Intent i = new Intent(Main.this, SecondActivity.class);
i.putExtra("NomeDati1", result);
i.putExtra("NomeDati2", String.valueOf(totalAmount));
startActivity(i);
}
}
class Planet {
String name;
int distance;
String quantità;
String valuta;
boolean selected = false;
public Planet(String name, int distance, String quantità) {
super();
this.name = name;
this.distance = distance;
this.quantità = quantità;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getDistance() {
return distance;
}
public void setDistance(int distance) {
this.distance = distance;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
public String getQuantità() {
return quantità;
}
public void setQuantità(String quantità) {
this.quantità = quantità;
}
public String getValuta() {
return valuta;
}
public void setValuta(String valuta) {
this.valuta = valuta;
}
}
public class PlanetAdapter extends ArrayAdapter<Planet>{
private List<Planet> planetList;
private Context context;
ArrayList<Planet> objects;
public PlanetAdapter(List<Planet> planetList, Context context) {
super(context, R.layout.single_listview_item, planetList);
this.planetList = planetList;
this.context = context;
}
public class PlanetHolder {
public TextView planetName;
public TextView distView;
public CheckBox chkBox;
public EditText edit;
public String quantità;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
PlanetHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(R.layout.single_listview_item, parent, false);
holder = new PlanetHolder();
holder.planetName = (TextView) row.findViewById(R.id.name);
holder.distView = (TextView) row.findViewById(R.id.dist);
holder.chkBox = (CheckBox) row.findViewById(R.id.chk_box);
holder.edit = (EditText) row.findViewById(R.id.editText);
holder.edit.setVisibility(View.GONE);
holder.edit.setEnabled(false);
row.setTag(holder);
} else {
holder = (PlanetHolder) row.getTag();
}
final Planet p = planetList.get(position);
holder.chkBox.setOnCheckedChangeListener((Main) context);
final PlanetHolder finalHolder = holder;
holder.chkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (finalHolder.chkBox.isChecked()) {
finalHolder.edit.setVisibility(View.VISIBLE);
finalHolder.edit.setEnabled(true);
finalHolder.edit.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
p.setQuantità(finalHolder.edit.getText().toString().trim());
}
});
} else {
finalHolder.edit.setVisibility(View.GONE);
finalHolder.edit.setEnabled(false);
finalHolder.edit.setText(null);
}
}
});
holder.planetName.setText(p.getName());
holder.distView.setText("" + p.getDistance());
holder.chkBox.setChecked(p.isSelected());
holder.chkBox.setTag(p);
holder.edit.setEnabled(false);
return row;
}
ArrayList<Planet> getBox() {
ArrayList<Planet> box = new ArrayList<Planet>();
for (Planet p : planetList) {
if (p.selected)
box.add(p);
}
return box;
}
}
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportFragmentManager().beginTransaction().
replace(R.id.fragmentContainer, new MyListFragment()).commit();
}
}
public类主扩展ActionBarActivity实现
android.widget.CompoundButton.OnCheckedChangeListener{
ListView lv;
ArrayList planetList;
飞机适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv=(ListView)findViewById(R.id.ListView);
displayPlanetList();
}
私有void displaytlist(){
planetList=新的ArrayList();
添加(新行星(“玛格丽塔”,6,“€”);
添加(新行星(“迪亚沃拉”,7,“€”);
添加(新行星(“Bufalina”,5,“€”);
添加(新行星(“Marinara”,5,“€”);
添加(新行星(“维也纳”,4“€”);
plAdapter=新的PlanetAdapter(planetList,this);
低压设置适配器(plAdapter);
}
@凌驾
检查更改后的公共无效(复合按钮视图,布尔值已检查){
int pos=lv.getPositionForView(按钮视图);
如果(位置!=列表视图。位置无效){
行星p=行星列表get(位置);
p、 已选择(已检查);
/*Toast.makeText(
这
单击行星:“+p.getName()+”。状态:是”
+isChecked,Toast.LENGTH_SHORT).show()*/
}
}
公共无效显示结果(视图五){
String result=“所选产品为:”;
int totalAmount=0;
对于(Planet p:plAdapter.getBox()){
如果(p.selected){
结果+=“\n”+p.name+“+p.distance+”€“+”q.tá:“+p.getQuantitá();
//if(p.quantitáequals(“”)和p.quantitáequals(null)){
System.out.println(“leggo questo记录:”+p.name+“”+p.distance+“”+p.quantitá);
System.out.println(“leggo questo p.getquatit:”+p.quantit);
//}
//否则{
System.out.println(“p.quantitá中的leggo questo:+p.getQuantitá());
int quantitaInt=Integer.parseInt(p.getQuantitá());
总金额+=p.距离*数量;
//}
}
}
//Toast.makeText(此,结果+“\n”+”总量:=“+totalAmount,Toast.LENGTH_LONG).show();
//整数.toString(totalAmount);
意图i=新意图(Main.this,SecondActivity.class);
i、 putExtra(“NomeDati1”,结果);
i、 putExtra(“NomeDati2”,String.valueOf(totalAmount));
星触觉(i);
}
}
类行星{
字符串名;
整数距离;
字符串数量;
弦值;
所选布尔值=false;
公共行星(字符串名称、整数距离、字符串数量){
超级();
this.name=名称;
这个距离=距离;
这个。quantitá=quantitá;
}
公共字符串getName(){
返回名称;
}
公共void集合名(字符串名){
this.name=名称;
}
公共int getDistance(){
返回距离;
}
公共空间设置距离(整数距离){
这个距离=距离;
}
公选{
返回选中的;
}
已选择公共无效设置(已选择布尔值){
this.selected=selected;
}
公共字符串getQuantitá(){
返回量;
}
public void setQuantitá(字符串quantitá){
这个。quantitá=quantitá;
}
公共字符串getValuta(){
返回值;
}
公共void setValuta(字符串valuta){
this.valuta=valuta;
}
}
公共级飞机适配器扩展阵列适配器{
私人名单;
私人语境;
阵列列表对象;
公共平面捕捉器(列表平面列表、上下文){
超级(上下文、右布局、单个列表视图、平面列表);
this.planetList=planetList;
this.context=上下文;
}
公共级刨床{
公共文本视图平面名称;
公共文本视图;
公共复选框chkBox;
公共编辑文本编辑;
公共字符串量化;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视图行=转换视图;
刨刀夹持器=空;
if(行==null){
LayoutInflater充气器=((活动)上下文)。getLayoutInflater();
行=充气机。充气(R.layout.single\u listview\u项目,父项,false);
支架=新的刨床支架();
holder.planetName=(TextView)row.findViewById(R.id.name);
holder.distView=(TextView)row.findViewById(R.id.dist);
holder.chkBox=(复选框)row.findViewById(R.id.chk_框);
holder.edit=(EditText)row.findViewById(R.id.EditText);
holder.edit.setVisibility(View.GONE);
holder.edit.setEnabled(false);
row.setTag(支架);
}否则{
holder=(PlanetHolder)行。getTag();
}
最终行星p=行星列表get(位置);
holder.chkBox.setOnCheckedChangeListener((主)上下文);
最终刨床最终刨床=保持架;
holder.chkBox.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
if(finalHolder.chkBox.isChecked()){
finalHolder.edit.setVisibility(View.VISIBLE);
finalHolder.edit.setEnabled(true);
finalHolder.edit.addTextChangedListener(新的TextWatcher(){
@凌驾
更改前的公共void(字符序列s、int start、in
<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"
>
<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
public class Main extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportFragmentManager().beginTransaction().
replace(R.id.fragmentContainer, new MyListFragment()).commit();
}
}
public class MyListFragment extends Fragment implements
android.widget.CompoundButton.OnCheckedChangeListener {
ListView lv;
ArrayList<Planet> planetList;
PlanetAdapter plAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_view, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
lv = (ListView) findViewById(R.id.listview);
displayPlanetList();
}
private void displayPlanetList() {
planetList = new ArrayList<Planet>();
planetList.add(new Planet("Margherita", 6, "€"));
planetList.add(new Planet("Diavola", 7,"€"));
planetList.add(new Planet("Bufalina", 5,"€"));
planetList.add(new Planet("Marinara", 5,"€"));
planetList.add(new Planet("Viennese", 4,"€"));
plAdapter = new PlanetAdapter(planetList, this);
lv.setAdapter(plAdapter);
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int pos = lv.getPositionForView(buttonView);
if (pos != ListView.INVALID_POSITION) {
Planet p = planetList.get(pos);
p.setSelected(isChecked);
/*Toast.makeText(
this,
"Clicked on Planet: " + p.getName() + ". State: is "
+ isChecked, Toast.LENGTH_SHORT).show();*/
}
}
public void showResult(View v) {
String result = "Selected Product are :";
int totalAmount=0;
for (Planet p : plAdapter.getBox()) {
if (p.selected){
result += "\n" + p.name+" "+p.distance+"€"+"q.tà :"+p.getQuantità();
//if (p.quantità.equals("") && p.quantità.equals(null) ){
System.out.println("leggo questo record:"+p.name + " " + p.distance + " " + p.quantità );
System.out.println("leggo questo p.getquatità :"+p.quantità );
//}
//else{
System.out.println("leggo questo in p.quantità: "+p.getQuantità());
int quantitaInt= Integer.parseInt(p.getQuantità() );
totalAmount+=p.distance * quantitaInt;
//}
}
}
// Toast.makeText(this, result+"\n"+"Total Amount:="+totalAmount, Toast.LENGTH_LONG).show();
//Integer.toString(totalAmount);
Intent i = new Intent(getActivity(), SecondActivity.class);
i.putExtra("NomeDati1", result);
i.putExtra("NomeDati2", String.valueOf(totalAmount));
startActivity(i);
}
}