[英]Android - Radiobutton click event to go to new activity
我想做一些小的选择表格。
我想做一个点击事件,如果我选择第一个无线电组中的一个,然后选择第二个无线电组中的另一个,它将带我进行新的活动。 我有两个无线电组,每个无线电组内部都有两个单选按钮。
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton android:id="@+id/physic"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="physic"
android:onClick="onRadioButtonClicked"/>
<RadioButton android:id="@+id/math"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="math"
android:onClick="onRadioButtonClicked"/>
</RadioGroup>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton android:id="@+id/theories"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="theories"
android:onClick="onRadioButtonClicked"/>
<RadioButton android:id="@+id/problems_solving"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="problem solving"
android:onClick="onRadioButtonClicked"/>
</RadioGroup>
我声明了按钮,并尝试如下使用onRadioButtonClicked:
public void onRadioButtonClicked(View view) {
boolean checked = ((RadioButton) view).isChecked();
switch(view.getId()) {
case R.id.math:
if (checked)
switch(view.getId()) {
case R.id.problems_solving:
if (checked)
showFirstWord("math problem resolution");
break;
case R.id.theories:
if (checked)
showSecondWord("math theories");
break;
}
break;
case R.id.physic:
if (checked)
switch(view.getId()) {
case R.id.problems_solving:
if (checked)
showThirdWord("physic problem solving");
break;
case R.id.theories:
if (checked)
showFourthWord("physic theories");
break;
}
break;
}
}
我希望函数中的字符串出现在如下所示的其他活动的文本视图中:
private void showFirstWord (String text) {
Intent first_word = new Intent(this, FirstActivity.class);
first_word.putExtra("key", text);
startActivity(first_word);
}
private void showSecondWord (String text) {
Intent second_word = new Intent(this, SecondActivity.class);
second_word.putExtra("key", text);
startActivity(second_word);
}
private void showThirdWord (String text) {
Intent third_word = new Intent(this, ThirdActivity.class);
third_word.putExtra("key", text);
startActivity(third_word);
}
private void showFourthWord (String text) {
Intent fourth_word = new Intent(this, FourthActivity.class);
fourth_word.putExtra("key", text);
startActivity(fourth_word);
}
我尝试从Android开发人员关注此页面,但仍不确定该如何处理: https : //stuff.mit.edu/afs/sipb/project/android/docs/guide/topics/ui/controls/ radiobutton.html
我的方法似乎不正确,因为我无法让字符串出现在其他活动中。 我现在可以进行推理还是应该学习另一种方法?
谢谢 :)
String str; // store the text corresponding to the RadioButton which is clicked
switch(view.getId()) {
case R.id.radioButton1:
if (checked)
str = "button1Text";
break;
case R.id.radioButton2:
if (checked)
str = "button2Text";
break;
case R.id.radioButton3:
if (checked)
str = "button3Text";
break;
}
Intent intent = new Intent(this, WinderDTActivity.class);
intent.putExtra("radioChosen", str); // pass "str" to the next Activity
您可以简化代码onRadioButtonClicked
只需先创建一个名为subjectSelected
的String
变量。
然后:
private String subjectSelected = "";
public void onRadioButtonClicked(View view) {
RadioButton radioButton = (RadioButton) view;
switch(view.getId()) {
case R.id.math:
subjectSelected = radioButton.getText().toString();
break;
case R.id.physic:
subjectSelected = radioButton.getText().toString();
break;
case R.id.problems_solving:
if (subjectSelected.equals("math")) {
showFirstWord ("math problem resolution");
} else if (subjectSelected.equals("physic")) {
showThirdWord("physic problem solving");
}
break;
case R.id.theories:
if (subjectSelected.equals("math")) {
showSecondWord("math theories");
} else if (subjectSelected.equals("physic")) {
showFourthWord("physic theories");
}
break;
}
}
并显示您传递给另一个活动的文本。 使用Bundle
获取key
的价值。
例如:
public class FirstActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
Bundle bundle = getIntent().getExtras();
String key = bundle.getString("key");
TextView textView = (TextView) findViewById(R.id.textView1); // Replace the textView1 with the id you set to your textview.
textView.setText(key);
}
}
您可以复制FirstActivity
的代码并将其粘贴到SecondActivity
, ThirdActivity
和FourthActivity
来获取密钥。
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