1

我正在开发一个安卓应用程序。这就是我想要的。

有性别微调器;男性和女性。当用户选择男性时,它会出现image1,但是当用户选择女性时,image1会消失。我正在考虑使用 set.alpha(0)。

这是我的代码。

public class Froyo2Activity extends Activity {
    Spinner genderSpin;
    ImageView image1;
    Button submit;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_froyo2);

        addButtonListener();
    }

    public void addButtonListener(){
        submit = (Button)findViewById(R.id.submit);
        image1 = (ImageView)findViewById(R.id.imageView1);
        genderSpin = (Spinner)findViewById(R.id.gender_spin);

        submit.setOnClickListener(new OnClickListener(){            
            @Override
            public void onClick(View arg0) {                
                if(genderSpin.getSelectedItemPosition() == 1){
                    image1.setAlpha(0);
                }
            }
        });     
    }
}

这是我在 res/layout 中的代码 froyo2.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/widget54"
    android:layout_width="wrap_content"
    android:layout_height="fill_parent" >

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="819dp"
    tools:context=".RelativeActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="Welcome"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1" >

        <TextView
            android:id="@+id/textView2"
            android:layout_width="131dp"
            android:layout_height="wrap_content"
            android:text="Priority Level"
            android:textAppearance="?android:attr/textAppearanceMedium" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/linearLayout1"
        android:layout_toRightOf="@+id/linearLayout1" >

        <Spinner
            android:id="@+id/prior_spin"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:entries="@array/priorArray"
            android:prompt="@string/prior_prompt" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/linearLayout2"
        android:layout_toRightOf="@+id/linearLayout2" >

    </LinearLayout>

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/linearLayout2"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText1"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button1"
        android:layout_alignBottom="@+id/button1"
        android:layout_alignParentLeft="true"
        android:text="Age"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button
        android:id="@+id/button2"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_alignRight="@+id/button1"
        android:layout_below="@+id/button1"
        android:text="5.1" />

    <Button
        android:id="@+id/button3"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button2"
        android:layout_alignRight="@+id/button2"
        android:layout_below="@+id/button2"
        android:text="Select ETA" />

    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button1"
        android:text="BP/P"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button3"
        android:layout_alignBottom="@+id/button3"
        android:layout_alignLeft="@+id/textView9"
        android:text="ETA"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button3"
        android:layout_marginTop="15dp"
        android:text="Location"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/editText6"
        android:text="Submit 5.1" />

    <EditText
        android:id="@+id/editText3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button3"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/button3"
        android:ems="10"
        android:inputType="textPostalAddress" />

    <EditText
        android:id="@+id/editText4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText3"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText3"
        android:ems="10" />

    <TextView
        android:id="@+id/textView10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView5"
        android:layout_alignTop="@+id/editText4"
        android:layout_toLeftOf="@+id/editText4"
        android:text="Special Handling"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView10"
        android:layout_below="@+id/editText4"
        android:layout_marginTop="15dp"
        android:text="Drug"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText4"
        android:layout_toRightOf="@+id/textView10"
        android:ems="10" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/linearLayout2"
        android:text="Firstname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/linearLayout2"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/textView4"
        android:ems="10" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText2"
        android:layout_alignBottom="@+id/editText2"
        android:layout_alignRight="@+id/textView4"
        android:text="Lastname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText2"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText2"
        android:text="OriFroyoAge" />

    <EditText
        android:id="@+id/editText6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText5"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText5"
        android:ems="10" />

    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText6"
        android:layout_alignBottom="@+id/editText6"
        android:layout_alignParentLeft="true"
        android:text="Diagnostic"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="300dp"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/imageView1"
        android:layout_toRightOf="@+id/imageView1"
        android:src="@drawable/back2" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="300dp"
        android:layout_below="@+id/editText6"
        android:layout_toRightOf="@+id/textView10"
        android:src="@drawable/malefull" />

    <TextView
        android:id="@+id/textView13"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignTop="@+id/imageView1"
        android:layout_marginTop="124dp"
        android:text="Injury(s)"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_toRightOf="@+id/linearLayout2"
        android:layout_weight="1"
        android:text="Gender"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner
        android:id="@+id/gender_spin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/textView3"
        android:entries="@array/genderArray"
        android:prompt="@string/gender_prompt" />

</RelativeLayout>
</ScrollView>

这个在 res/layout-land

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/widget54"
android:layout_width="wrap_content"
android:layout_height="fill_parent" >

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="798dp"
    android:layout_height="wrap_content"
    tools:context=".RelativeActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="Welcome"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:text="Priority Level"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView2"
        android:layout_toLeftOf="@+id/spinner2"
        android:entries="@array/priorArray"
        android:prompt="@string/prior_prompt" />

    <Spinner
        android:id="@+id/spinner2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView3"
        android:layout_below="@+id/textView3"
        android:layout_toRightOf="@+id/textView7"
        android:entries="@array/genderArray"
        android:prompt="@string/gender_prompt" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/spinner1"
        android:text="Firstname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/spinner2"
        android:layout_below="@+id/textView4"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText1"
        android:text="Lastname"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/editText1"
        android:layout_below="@+id/textView5"
        android:ems="10" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText2"
        android:text="Age"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/textView5"
        android:layout_below="@+id/textView6"
        android:text="Age" />

    <Button
        android:id="@+id/button2"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/button1"
        android:layout_toLeftOf="@+id/button3"
        android:layout_toRightOf="@+id/textView4"
        android:text="BP/P" />

    <Button
        android:id="@+id/button3"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView8"
        android:layout_alignRight="@+id/editText2"
        android:layout_below="@+id/textView8"
        android:text="ETA" />

    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/button2"
        android:layout_toRightOf="@+id/textView4"
        android:text="BP/P"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView8"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/button2"
        android:layout_alignLeft="@+id/textView3"
        android:text="ETA"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_toLeftOf="@+id/imageView1"
        android:src="@drawable/malefull" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/spinner1"
        android:layout_toLeftOf="@+id/imageView2"
        android:text="Gender"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button1"
        android:text="Location"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView9"
        android:layout_toLeftOf="@+id/imageView2"
        android:ems="10" />

    <TextView
        android:id="@+id/textView10"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText3"
        android:text="Special Handling"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/editText3"
        android:layout_below="@+id/textView10"
        android:ems="10" />

    <TextView
        android:id="@+id/textView11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText4"
        android:text="Drug(s)"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView11"
        android:layout_toLeftOf="@+id/imageView2"
        android:ems="10" />

    <TextView
        android:id="@+id/textView12"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText5"
        android:text="Diagnostic"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <EditText
        android:id="@+id/editText6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView12"
        android:layout_toLeftOf="@+id/imageView2"
        android:ems="10" />

    <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/editText6"
        android:text="Submit" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/imageView2"
        android:layout_alignParentRight="true"
        android:src="@drawable/back2" />

</RelativeLayout>
</ScrollView>

然后我在模拟器中运行它,当点击按钮提交时,它说强制关闭应用程序。我有断点,我认为genderSpin.getSelectedItemPosition()是原因。但是我怎样才能获得用户为微调器选择的值?

感谢您的帮助。

===编辑解决方案。状态已关闭===

感谢那些在这方面帮助我很多的人。这是我的最终解决方案。我需要先让 SpinnerAdapter 检索所选微调器的上下文。

我也跟着教程从这里

我的最后一个代码是

genderSpin = (Spinner)findViewById(R.id.gender_spin);

    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
            R.array.genderArray, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    genderSpin.setAdapter(adapter);
    genderSpin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> parent, View arg1, int pos, long arg3){
            String fontname = parent.getItemAtPosition(pos).toString();
            Toast.makeText(parent.getContext(), "The External Font Is " +fontname, Toast.LENGTH_LONG).show();

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

选中微调项后,如果选择女性会吐出“外部字体是女性”,如果选择男性会吐出“外部字体是男性”。谢谢你的帮助。希望这可以为寻求帮助的人提供很好的指导。

4

1 回答 1

2

您能否发布您的微调器 OnItemSelectedListener 代码。在按钮 onclick 中,只有您添加了获取微调器位置的代码。下面的代码用于获取用户选择的微调器项目。

    Spinner spinner = (Spinner) findViewById(R.id.spinner);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
            this, R.array.planets_array, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(listener);
    private OnItemSelectedListener listener =new OnItemSelectedListener() {
      //do what ever you want to do when item selected


    public void onItemSelected(AdapterView<?> parent, View arg1, int pos,
            long arg3) {
        // TODO Auto-generated method stub
        fontname=parent.getItemAtPosition(pos).toString();
         Toast.makeText(parent.getContext(), "The External Font Is " +fontname, Toast.LENGTH_LONG).show();
       }
       }
于 2012-09-07T07:07:32.487 回答