Question

我需要使用类似setMultiChoiceItems样式的对话框，但需要更多信息，所以我使用的是自定义布局。

我认为我的代码非常庞大且混乱。我想知道是否还有其他更简单的方法来做到这一点。

####正在运行的对话框：####

####活动布局：R.layout.activity_formsmultipleselectcustom_java ####

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".FormsMultipleSelectCustomJava">

    <Button
            android:text="Dialog"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:id="@+id/btndialog" app:layout_constraintEnd_toEndOf="parent"
            android:layout_marginEnd="8dp" android:layout_marginRight="8dp"
            app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="8dp"
            android:layout_marginStart="8dp" app:layout_constraintTop_toTopOf="parent" android:layout_marginTop="8dp"
            app:layout_constraintBottom_toTopOf="@+id/btnenviar"/>
    <Button
            android:text="Send"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/btnenviar"
            app:layout_constraintTop_toBottomOf="@+id/btndialog" android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent"
            android:layout_marginEnd="8dp" android:layout_marginRight="8dp"
            app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="8dp"
            android:layout_marginStart="8dp"/>
</androidx.constraintlayout.widget.ConstraintLayout>

####布局：R.layout.activity_formsmultipleselectcustom_java_lines ####

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:gravity="center">

    <ImageView
            android:id="@+id/imgvicon"
            tools:srcCompat="@tools:sample/avatars"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:layout_marginTop="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginBottom="8dp"
            android:adjustViewBounds="true"/>
    <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" android:layout_weight="1">
        <TextView
                android:text="Titulo"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" android:id="@+id/txtv_titulo"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginRight="8dp" android:textSize="18sp"/>
        <TextView
                android:text="Descrição"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" android:id="@+id/txtv_desc"
                android:layout_marginLeft="8dp" android:layout_marginStart="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginRight="8dp" android:visibility="visible" android:layout_marginTop="3dp"/>
    </LinearLayout>
    <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:id="@+id/chkbox"
            android:layout_marginEnd="8dp" android:layout_marginRight="8dp"
            android:layout_marginTop="8dp" android:layout_marginBottom="8dp"
    />
</LinearLayout>

#### ALItensValuesList ####

public class ALItensValuesList {
    private int icon;
    private String value;
    private String titulo;
    private String descricao;
    private Boolean isChecked;

    public ALItensValuesList (int icon, String value, String titulo, String descricao) {
        this.icon = icon;
        this.value = value;
        this.titulo = titulo;
        this.descricao = descricao;
        this.isChecked = false;
    }

    int getIcon() { return icon; }
    public String getValue() { return value; }
    public String getTitulo() { return titulo; }
    String getDescricao() { return descricao; }
    public Boolean getChecked() { return isChecked; }
    public void setChecked(Boolean isChecked) {
        this.isChecked = isChecked;
    }
}

#### ALItensInterface（适配器中ItemChecked的接口）####

public interface ALItensInterface {
    void onItemChecked(int position);
}

#### ALItensValuesAdapter ####

public class ALItensValuesAdapter  extends BaseAdapter {
    private ArrayList<ALItensValuesList> mData;
    private Context mContext;
    private ALItensInterface minterface;

    public ALItensValuesAdapter(ArrayList<ALItensValuesList> aldata, Context context, ALItensInterface minterface) {
        this.mData = aldata;
        this.mContext = context;
        this.minterface = minterface;
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = Objects.requireNonNull(mInflater).inflate(R.layout.activity_formsmultipleselectcustom_java_lines, null);
        }

        ImageView icon = convertView.findViewById(R.id.imgvicon);
        icon.setImageResource(mData.get(position).getIcon());
        TextView titulo = convertView.findViewById(R.id.txtv_titulo);
        titulo.setText(mData.get(position).getTitulo());
        TextView decricao = convertView.findViewById(R.id.txtv_desc);
        decricao.setText(mData.get(position).getDescricao());
        CheckBox checkbox = convertView.findViewById(R.id.chkbox);
        checkbox.setChecked(mData.get(position).getChecked());

        // When you click on the item line.
        convertView.setOnClickListener(v -> {
            checkbox.toggle();
            this.minterface.onItemChecked(position);
        });

        // When you click directly on the checkbox
        checkbox.setOnClickListener(v -> {
            this.minterface.onItemChecked(position);
        });

        return convertView;
    }
}

####对话框的活动####

public class FormsMultipleSelectCustomJava extends AppCompatActivity {

    String selectItensServer;
    String[] selectInitItens;
    ArrayList<String> selectedItemsList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_formsmultipleselectcustom_java);

        selectItensServer = "0b2,0e5,0f6,0h8"; // Example of random value received by the server.
        selectInitItens = selectItensServer.split(",");

        // Fixed values that fill the dialog
        ArrayList<ALItensValuesList> AlertDialogitemList = new ArrayList<>();
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_bicycle, "0a1", "Test 1", "Lorem ipsum dolor sit amet"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_btc, "0b2", "Test 2", "Duis at ullamcorper quam"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_car, "0c3", "Test 3", "Aenean aliquam sit amet nibh eget bibendum"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_credit_card, "0d4", "Test 4", "Sed a est vel velit rutrum porta"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_gamepad, "0e5", "Test 5", "Phasellus pellentesque arcu et fermentum tempus"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_gift, "0f6", "Test 6", "Integer arcu leo, consequat eget tempus sed"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_paypal, "0g7", "Test 7", "Pellentesque habitant morbi tristique senectus"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_taxi, "0h8", "Test 8", "Proin iaculis, velit ac consectetur bibendum, orci nisi scelerisque"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_utensils, "0i9", "Test 9", "Ut ullamcorper nisi dui, et sagittis ante mollis vitae"));
        AlertDialogitemList.add(new ALItensValuesList(R.drawable.atrib_whatsapp, "k10", "Test 10", "Donec rhoncus magna in mauris ultricies"));

        // Starting with some values already selected. 
        // I would like to know a way to simplify this loop.
        StringBuilder itensexib = new StringBuilder();
         for (int i = 0; i < AlertDialogitemList.size(); i++) {
             for (int j = 0; j < selectInitItens.length; j++) {
                 if (AlertDialogitemList.get(i).getValue().equals(selectInitItens[j])) {
                     AlertDialogitemList.get(i).setChecked(true);
                     selectedItemsList.add(AlertDialogitemList.get(i).getValue());
                     itensexib.append(AlertDialogitemList.get(i).getTitulo()+",");
                 }
             }
         }

        // Displays the items selected on the button.
        Button btnopendialog = findViewById(R.id.btndialog);
         if(selectedItemsList.size() >= 1) {
             btnopendialog.setText(itensexib);
         } else {
             btnopendialog.setText("Select Itens");
         }

        // Creating the dialog
        AlertDialog.Builder dialogbuider = new AlertDialog.Builder(this);
        dialogbuider.setCancelable(false);
        dialogbuider.setTitle("Itens");
        ALItensValuesAdapter mAdapter = new ALItensValuesAdapter(AlertDialogitemList, this, new ALItensInterface() {
            @Override
            public void onItemChecked(int position)
            {
                AlertDialogitemList.get(position).setChecked(!AlertDialogitemList.get(position).getChecked());
            }
        });
        dialogbuider.setAdapter(mAdapter, (dialog, which) -> {});

        dialogbuider.setPositiveButton("OK", (dialogInterface, which) -> {
            StringBuilder itensexib2 = new StringBuilder();
            selectedItemsList.clear();
            for(ALItensValuesList item : AlertDialogitemList) {
                if(item.getChecked()) {
                    selectedItemsList.add(item.getValue());
                    itensexib2.append(item.getTitulo()+",");
                }
            }
            if(selectedItemsList.size() > 0) {
                btnopendialog.setText(itensexib2);
            } else {
                btnopendialog.setText("Select Itens");
            }
        });

        dialogbuider.setNeutralButton("Clear", (dialogInterface, which) -> {
            for (int i = 0; i < AlertDialogitemList.size(); i++){
                AlertDialogitemList.get(i).setChecked(false);
            }
            selectedItemsList.clear();
            btnopendialog.setText("Select Itens");
        });

        AlertDialog dialog = dialogbuider.create();
        ListView listView = dialog.getListView();
        listView.setDivider(new ColorDrawable(Color.GRAY));
        listView.setDividerHeight(2);
        btnopendialog.setOnClickListener(v -> {
            dialog.show();
        });

        // Displays the values that will be sent by the form.
        findViewById(R.id.btnenviar).setOnClickListener(v -> {
            Toast.makeText(this, selectedItemsList.toString(), Toast.LENGTH_LONG).show();
        });
}

如果有人知道使该对话框以这种方式工作的其他方法，我很想见面。

Answer 1

您的逻辑代码保持不变。但是它转移到了Dialog Fragment中，因此活动代码减少了，并且所有与对话框相关的代码也转移到了对话框片段中。

您可以在这里看到简单的DialogFragment代码。

public class SimpleDialogFragment extends DialogFragment {

public static final String TAG = "SimpleDialogFragment";

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
    @Nullable Bundle savedInstanceState) {
    return inflater.inflate(R.layout.dialog_company_insight, container);
}

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
}

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setCancelable(false);
    setStyle(DialogFragment.STYLE_NO_TITLE, R.style.AppTheme_FullWidthDialog_MoreRounded);
}

}

用于从片段打开对话框：

new SimpleDialogFragment ()
        .show(getChildFragmentManager(), SimpleDialogFragment .TAG);

用于从活动中打开对话框：

  new SimpleDialogFragment ()
        .show(getSupportFragmentManager(), SimpleDialogFragment .TAG);

您可以在此处编码，就像简单的片段一样。如果仍然有任何查询评论，我会看到的。

如何使用“自定义布局”中的“列表”和“复选框”简化对话框代码？

1 个答案: