Question

我需要设置用户必须填写/选择页面中所有详细信息的验证。如果任何字段为空，则想显示Toast message to fill.现在我需要RadioButton中RadioGroup.的设置验证我尝试了此代码，但没有正常工作。建议我正确的方法。三江源。

// get selected radio button from radioGroup
int selectedId = gender.getCheckedRadioButtonId();
// find the radiobutton by returned id
selectedRadioButton = (RadioButton)findViewById(selectedId);
// do what you want with radioButtonText (save it to database in your case)
radioButtonText = selectedRadioButton.getText().toString();

if(radioButtonText.matches(""))
{
    Toast.makeText(getApplicationContext(), "Please select Gender", Toast.LENGTH_SHORT).show();
    Log.d("QAOD", "Gender is Null");
}
else
{
    Log.d("QAOD", "Gender is Selected");
}

Answer 1

如果您只想查看一个RadioButton，可以使用isChecked功能

if(radioButton.isChecked())
{
  // is checked    
}
else
{
  // not checked
}

如果您有RadioGroup，则可以使用

if (radioGroup.getCheckedRadioButtonId() == -1)
{
  // no radio buttons are checked
}
else
{
  // one of the radio buttons is checked
}

Answer 2

您需要做的就是使用getCheckedRadioButtonId()和isChecked()方法，

if(gender.getCheckedRadioButtonId()==-1)
{
    Toast.makeText(getApplicationContext(), "Please select Gender", Toast.LENGTH_SHORT).show();
}
else
{
    // get selected radio button from radioGroup
    int selectedId = gender.getCheckedRadioButtonId();
    // find the radiobutton by returned id
    selectedRadioButton = (RadioButton)findViewById(selectedId);
    Toast.makeText(getApplicationContext(), selectedRadioButton.getText().toString()+" is selected", Toast.LENGTH_SHORT).show();
}

https://developer.android.com/guide/topics/ui/controls/radiobutton.html

Answer 3

对每个必须检查的radioButton使用 isChecked（）函数。

RadioButton maleRadioButton, femaleRadioButton;

maleRadioButton = (RadioButton) findViewById(R.id.maleRadioButton);
femaleRadioButton = (RadioButton) findViewById(R.id.femaleRadioButton);

然后将结果用于if / else案例考虑。

if (maleRadioButton.isChecked() || femaleRadioButton.isChecked()) {
     Log.d("QAOD", "Gender is Selected");
} else {
    Toast.makeText(getApplicationContext(), "Please select Gender", Toast.LENGTH_SHORT).show();
    Log.d("QAOD", "Gender is Null");
}

Answer 4

尝试使用此

public void onRadioButtonClicked(View view) {
        // Is the button now checked?
        boolean checked = ((RadioButton) view).isChecked();

        // Check which radio button was clicked
        switch(view.getId()) {
            case R.id.standard_delivery:
                if (checked)
                    Toast.makeText(DishActivity.this," standard delivery",Toast.LENGTH_LONG).show();
                    break;
            case R.id.midnight_delivery:
                if (checked)
                    Toast.makeText(DishActivity.this," midnight delivery",Toast.LENGTH_LONG).show();
                    break;
        }
    }

这是java类

tryCatch()

Answer 5

尝试使用方法isChecked（）;

像，

selectedRadioButton.isChecked（） - ＆gt;返回布尔值。

参考here了解有关单选按钮

的更多详细信息

Answer 6

我使用我的radiobuttons的id与我使用enter code here

获得的checkedRadioButton的ID进行比较

这是我的代码：

mRadioGroup.getCheckedRadioButtonId()

Answer 7

我使用了以下内容，并且对我有用。我使用了一个布尔验证函数，其中如果选中了“单选组”中的任何“单选按钮”，则验证函数返回true并提交。如果返回false，则不提交任何内容，并显示“ Select Gender”的敬酒：

MainActivity.java

public class MainActivity extends AppCompatActivity {
    private RadioGroup genderRadioGroup;

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

    //Initialize Radio Group And Submit Button
    genderRadioGroup=findViewById(R.id.gender_radiogroup);
    AppCompatButton submit = findViewById(R.id.btnSubmit);

    //Submit Radio Group using Submit Button
    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //Check Gender radio Group For Selected Radio Button
            if(genderRadioGroup.getCheckedRadioButtonId()==-1){//No Radio Button Is Checked
                Toast.makeText(getApplicationContext(), "Please Select Gender", Toast.LENGTH_LONG).show();
            }else{//Radio Button Is Checked
                RadioButton selectedRadioButton = findViewById(genderRadioGroup.getCheckedRadioButtonId());
                gender = selectedRadioButton == null ? "" : selectedRadioButton.getText().toString().trim();
            }
            //Validate
            if (validateInputs()) {
                //code to proceed when Radio button is checked
            }
        }
    }
    //Validation - No process is initialized if no Radio button is checked
    private boolean validateInputs() {
        if (genderRadioGroup.getCheckedRadioButtonId()==-1) {
            return false;
        }
        return true;
    }
}

在activity_main.xml中：

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/gender"/>

    <RadioGroup
            android:id="@+id/gender_radiogroup"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

        <RadioButton
                android:id="@+id/male"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/male"/>

        <RadioButton
                android:id="@+id/female"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/female""/>

    </RadioGroup>

    <android.support.v7.widget.AppCompatButton
        android:id="@+id/btnSubmit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/submit"/>

</LinearLayout>

如果未选择性别单选按钮，则继续执行的代码将不会运行。

我希望这会有所帮助。

Answer 8

  rgrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
            switch(i) {
                case R.id.type_car:
                    num=1;
                    Toast.makeText(getApplicationContext()," Car",Toast.LENGTH_LONG).show();
                    break;
                case R.id.type_bike:
                    num=2;
                    Toast.makeText(getApplicationContext()," Bike",Toast.LENGTH_LONG).show();
                    break;
            }
        }
    });

Answer 9

我的回答是根据the documentation进行的，效果很好。

1）如下所示，在xml文件中包含android:onClick="onRadioButtonClicked"：

<RadioGroup
android:id="@+id/rg1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<RadioButton
    android:id="@+id/b1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="onCreateOptionsMenu()"
    android:onClick="onRadioButtonClicked"
            />
<RadioButton
    android:id="@+id/b2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="onCreateMenu()"
    android:onClick="onRadioButtonClicked"
            />
</RadioGroup>

2）在Java文件中，在onRadioButtonClicked方法之外实现onCreate()方法，如下所示：

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.b1:
            if (checked)
            {
                Log.e("b1", "b1" );
                break;
            }
        case R.id.b2:
            if (checked)
                break;
    }
}

Answer 10

mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
            if (mRadioButtonMale.isChecked()) {
                text = "male";
            } else {
                text = "female";
            }
        }
    });

OR

 mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
            if (mRadioButtonMale.isChecked()) { text = "male"; }
            if(mRadioButtonFemale.isChecked()) { text = "female"; }
        }
    });

Answer 11

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
                checkedId = radioGroup.getCheckedRadioButtonId();

                switch (checkedId) {
                    case R.id.expert_rb:
                        // do something
                        break;
                    case R.id.no_expert_rb:
                        // do something else
                        break;
                   
                }
            }
        });

如何检查Android中的radiogroup中是否检查了radiobutton？

11 个答案: