Question

我是Android编程新手。我想在Android应用程序内的滚动视图内创建动态单选按钮单选按钮组。无线电组具有仅以水平方式显示的限制。但我想要的是像矩阵一样的单选按钮模式。

下面的图片将为您提供我想要达到的目标的线索第一张图是我能做的。第二张图是我想要实现的。

与此相关的另一个挑战是，当选中一个时，单选按钮必须取消选中。（假设它们会在不同的广播组中显示。）

Answer 1

在xml布局中添加

        <LinearLayout
            android:id="@+id/linear1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:orientation="vertical">

            <RadioGroup
                android:id="@+id/radiogroup"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_centerVertical="true"
                android:orientation="vertical" />
        </LinearLayout>

并将此添加到您希望拥有单选按钮的“活动”中

RadioGroup rg = (RadioGroup) findViewById(R.id.radiogroup);
RadioButton[] rb = new RadioButton[items.size()];
for (int i = 0; i < items.size(); i++) {
    rb[i] = new RadioButton(this);
    rg.addView(rb[i]);
    rb[i].setText(items.get(i).getName());
}

Answer 2

使用此

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

    <RadioGroup android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/radioGroup">

     </RadioGroup>
</LinearLayout>

您可以添加动态单选按钮，如下所示

    RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radioGroup);
    for (int i=0;i<10,i++) {
        RadioButton radioButton = new RadioButton(getBaseContext());
        radioGroup.addView(radioButton);
    }

Answer 3

以下功能执行所需的功能： -

/**
 *Returns a linear layout containing radio buttons in nX2 matrix fashion
 * where n is Math.Ceil(iRadioBtnDs.size/2)
 *
 * @param iRadioBtnInfoDs Data Structure containing RadioBtnInformation..
 *                        Contains id and label of the radio buttons.
 * @param iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs Currently checked radio button's index
 *
 * @return returns the linear layout containing the generated nX2 radio buttons.
 */
public LinearLayout getLinearLayoutContainingRadioButtonInNX2MatrixFashion(Context iContext,ArrayList<DynamicRadioBtnDs> iRadioBtnInfoDs ,int iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs){


    final ArrayList<DynamicRadioBtnDs> loanTypeRadioBtns     =      iRadioBtnInfoDs;

    float halfOfRadioCount                                   =      (float) iRadioBtnInfoDs.size() / 2;

    int noOfRadioGroupsNeeded                                =      (int) Math.ceil(halfOfRadioCount);

    LinearLayout radioGrpParentLl                            =      new LinearLayout(iContext);
    LinearLayout.LayoutParams paramsRadioGrpParentLl         =      new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    radioGrpParentLl.setLayoutParams(paramsRadioGrpParentLl);
    radioGrpParentLl.setOrientation(LinearLayout.VERTICAL);

    for (int i = 0; i < noOfRadioGroupsNeeded; i++) {

        final int indexOfCurrentRadioGrpInParentLl = i;

        //Creating i th radio group...

        final RadioGroup radioGroupCurrentInteration                 =       new RadioGroup(iContext);
        RadioGroup.LayoutParams paramsRadio         =       new RadioGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        radioGroupCurrentInteration.setOrientation(RadioGroup.HORIZONTAL);
        radioGroupCurrentInteration.setLayoutParams(paramsRadio);

        //Creating 2*i th radio button...
        //This will always be in the left...

        RadioButton leftRadioButtonInCurrentRadioGroup = new RadioButton(iContext);
        RadioGroup.LayoutParams paramsLeftRadioBtnInCurrentRadioGroup = new RadioGroup.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT);

        String leftRadionBtnLabel = loanTypeRadioBtns.get(2 * i).getLabel();
        leftRadioButtonInCurrentRadioGroup.setText(leftRadionBtnLabel);
        leftRadioButtonInCurrentRadioGroup.setLayoutParams(paramsLeftRadioBtnInCurrentRadioGroup);

        radioGroupCurrentInteration.addView(leftRadioButtonInCurrentRadioGroup);
        paramsLeftRadioBtnInCurrentRadioGroup.weight = 1f;
        leftRadioButtonInCurrentRadioGroup.setTypeface(Typeface.DEFAULT_BOLD);

        class CustomCheckedChangeListener implements CompoundButton.OnCheckedChangeListener {

            private int indexOfCurrentlyCheckedRbInRadioBtnInfoDs;

            CustomCheckedChangeListener(int iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs) {
                indexOfCurrentlyCheckedRbInRadioBtnInfoDs       =  iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs;
            }

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    indexOfCurrentlyCheckedRbInRadioBtnInfoDs   = indexOfCurrentRadioGrpInParentLl * 2;
                }
            }
        }

        CustomCheckedChangeListener checkChangedListenerForLeftRb = new CustomCheckedChangeListener(iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs);

        leftRadioButtonInCurrentRadioGroup.setOnCheckedChangeListener(checkChangedListenerForLeftRb);



        //Right radio button may or may not be required..
        //(i+1) represents the level starting from 1....
        //For example i+1 is 5 means we are now in the 5th iteration
        //ie 5th radio group...

        //If we need right radio button,
        //The size will be equal to no of radio groups*2

        if((i+1)*2 <=loanTypeRadioBtns.size()) {
            //The right radio group is needed

            RadioButton rightRadioButtonInCurrentRadioGroup                     =   new RadioButton(iContext);
            RadioGroup.LayoutParams paramsRightRadioBtnInCurrentRadioGroup      =   new RadioGroup.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT);
            rightRadioButtonInCurrentRadioGroup.setLayoutParams(paramsLeftRadioBtnInCurrentRadioGroup);
            paramsRightRadioBtnInCurrentRadioGroup.weight                       =   1f;
            rightRadioButtonInCurrentRadioGroup.setTypeface(Typeface.DEFAULT_BOLD);
            String rightRadioBtnLabel                                           =   loanTypeRadioBtns.get((2 * i) + 1).getLabel();
            rightRadioButtonInCurrentRadioGroup.setText(rightRadioBtnLabel);
            radioGroupCurrentInteration.addView(rightRadioButtonInCurrentRadioGroup);


            class CustomCheckedChangeListenerForRightRb implements CompoundButton.OnCheckedChangeListener {

                private int indexOfCurrentlyCheckedRbInRadioBtnInfoDs;

                CustomCheckedChangeListenerForRightRb(int iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs) {
                    indexOfCurrentlyCheckedRbInRadioBtnInfoDs       =  iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs;
                }

                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    if (isChecked) {
                        indexOfCurrentlyCheckedRbInRadioBtnInfoDs   = (indexOfCurrentRadioGrpInParentLl * 2)+1;
                    }
                }
            }

            CustomCheckedChangeListenerForRightRb checkChangedListenerForRightRb = new CustomCheckedChangeListenerForRightRb(iIndexOfCurrentlyCheckedRbInRadioBtnInfoDs);

            rightRadioButtonInCurrentRadioGroup.setOnCheckedChangeListener(checkChangedListenerForRightRb);


        }

        radioGroupCurrentInteration.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {

                RadioButton checkChangedRadioBtn = (RadioButton) group.findViewById(checkedId);
                if (checkChangedRadioBtn.isChecked()) {
                    //Some radio button in currentradioGrpParentLl
                    //Radio group has been checked....
                    LinearLayout loanEmiParentLl = (LinearLayout) group.getParent();
                    for (int i = 0; i < loanEmiParentLl.getChildCount(); i++) {
                        RadioGroup childRadioGroupAtIndexI = (RadioGroup) loanEmiParentLl.getChildAt(i);
                        if (!childRadioGroupAtIndexI.equals(group)) {
                            //Means the current radio group is a sister radio group....
                            //So clear checks...
                            childRadioGroupAtIndexI.setOnCheckedChangeListener(null);
                            childRadioGroupAtIndexI.clearCheck();
                            childRadioGroupAtIndexI.setOnCheckedChangeListener(this);

                        } else {
                            //Current radio group...
                            //So do nothing...
                        }
                    }
                }
            }
        });

        radioGrpParentLl.addView(radioGroupCurrentInteration);
    }

    return  radioGrpParentLl;

}







 public class DynamicRadioBtnDs {

    DynamicRadioBtnDs(String iId,String iLabel){
        id      =   iId;
        label   =   iLabel;
    }

    private String id;
    private String label;


    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getLabel() {
        return label;
    }

    public void setLabel(String label) {
        this.label = label;
    }
}

如果他们不打算处理单选按钮的id，用户可以将DynamicRadioBtnDs更改为String。

Answer 4

您可以动态添加任何视图到 Scrollview ，例如：

layoutInflater = LayoutInflater.from(this);
layoutParam = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1);
layoutParam.setMargins(10, 0, 10, 10);

for (int i = 0; i < 10; i++) {               
    View view = layoutInflater.inflate(R.layout.deals_style, null);
    ((TextView) deals.findViewById(R.id.tv_product_name))
        .setText("my text")

        layoutNewDeals.addView(deals, layoutParam);
}

将 TextView 替换为单选按钮。

您必须创建自定义布局文件或在运行时创建单选按钮

在Scroll视图中添加Dynamic RadioButtons

4 个答案: