Question

编辑：我的代码没有任何问题，真正的问题是我的图片内容，当我减少我的图片内容问题已经解决了

我希望在RadioGroup中有一个带有3个RadioButtons的警报对话框，每个RadioButtons都有一个图像而不是简单的单选按钮视图，并且根据此选择在我的mainActivity中进行更改。一切正常，除了我不能将selected_user返回到mainActivity。我搜索了很多，但我找不到解决方案。我是Android新手，请帮助我。

mainActivity.java：

 myImage.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {

                myAlert alert = new myAlert(this, value);//I use this value to check the item that was chosen in mainActivity before calling AlertDialog
                alert.show();
            }
        });

myAlert.java：

public class myAlert extends Dialog implements View.OnClickListener {

Context context;
String value;
RadioButton rb1, rb2, rb3;
RadioGroup rg;

public myAlert(@NonNull Context context, String value)
{
    super(context);
    this.context = context;
    this.value = value;
}

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

    rb1 = (RadioButton)findViewById(R.id.rb1);
    rb2 = (RadioButton)findViewById(R.id.rb2);
    rb3 = (RadioButton)findViewById(R.id.rb3);

    if(value.equals("car"))
        rb1.setChecked(true);
    else if(value.equals("bus"))
        rb2.setChecked(true);
    else
        rb3.setChecked(true);

    rb1.setOnClickListener(this);
    rb2.setOnClickListener(this);
    rb3.setOnClickListener(this);
}

@Override
public void onClick(View v)
{
    int selectId=rg.getCheckedRadioButtonId();
    RadioButton selected = (RadioButton)findViewById(selectId);
    String selected_user = selected.getText().toString();

    dismiss();
}}

alert.xml：

<RadioButton
    android:id="@+id/rb1"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:background="@drawable/draw"
    android:button="@null"
    android:drawableBottom="@drawable/ib_rb1_alert"
    />

<RadioButton
    android:id="@+id/rb3"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:background="@drawable/draw"
    android:button="@null"
    android:drawableBottom="@drawable/ib_rb3_alert" />

<RadioButton
    android:id="@+id/rb2"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:background="@drawable/draw"
    android:button="@null"
    android:drawableBottom="@drawable/ib_rb2_alert" />

Answer 1

如果我理解了您的问题和代码，那么您将无法返回或设置＆＃34; selected_user＆＃34;主要活动的变量，如果是，则在主要活动上添加一个类变量＆amp;创建它的setter方法并设置你的＆＃34; selected_user＆＃34;变量值，请检查：

   class  MainActivity extends AppCompatActivity{
    String mySelectedUserID = "";

     public void setMySelectedUserID(String mySelectedUserID) {
        this.mySelectedUserID = mySelectedUserID;
    }
 }

myAlert.class：

public class myAlert extends Dialog implements View.OnClickListener {

                MainActivity context;
                String value;
                RadioButton rb1, rb2, rb3;
                RadioGroup rg;

                public myAlert(@NonNull MainActivity context, String value) {
                    super(context);
                    this.context = context;
                    this.value = value;
                }

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

                    rb1 = (RadioButton) findViewById(R.id.rb1);
                    rb2 = (RadioButton) findViewById(R.id.rb2);
                    rb3 = (RadioButton) findViewById(R.id.rb3);

                    if (value.equals("car"))
                        rb1.setChecked(true);
                    else if (value.equals("bus"))
                        rb2.setChecked(true);
                    else
                        rb3.setChecked(true);

                    rb1.setOnClickListener(this);
                    rb2.setOnClickListener(this);
                    rb3.setOnClickListener(this);
                }

                @Override
                public void onClick(View v) {
                    int selectId = rg.getCheckedRadioButtonId();
                    RadioButton selected = (RadioButton) findViewById(selectId);
                    String selected_user = selected.getText().toString();
                    context.setMySelectedUserID(selected_user);

                    dismiss();
                }
            }

Android - 如何在AlertDialog中使用图像而不是RadioButtons

1 个答案: