android - setContentView 和 EditText

Question

我有两个布局 xml，但无法使第二个布局正常工作。 放置在第二个布局上的 EditText 无法按预期工作。它不接受字符。

我在这里错过了什么？ 我应该改用 startActivity() 吗？

主.java

public class Main extends Activity implements View.OnClickListener {

    EditText box1, box2;

    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        showXml1();
    }

    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.button1:
            String box11 = box1.getText().toString();
            Toast.makeText(this, box11,Toast.LENGTH_SHORT).show();
            showXml2();
            break;
        case R.id.button2:
            String box22 = box2.getText().toString();
            Toast.makeText(this, box22,Toast.LENGTH_SHORT).show();
            showXml1();
            break;
        }
    }

    public void showXml2() {
        setContentView(R.layout.main2);
        box2 = (EditText) findViewById(R.id.editText2);
    }
    public void showXml1() {
        setContentView(R.layout.main);
        box1 = (EditText) findViewById(R.id.editText1);
    }
}

主.xml

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

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Main1" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button1" 
        android:onClick="onClick"
        />

</LinearLayout>

mail2.xml

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

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Main2" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button2" 
        android:onClick="onClick"
        />
</LinearLayout>

Answer 1

使用结构类似于此的元布局 xml 文件:

meta_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<ViewFlipper
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
      android:id="@+id/root">
    <include
      layout="@layout/main" />
    <include
       layout="@layout/main2" />
</ViewFlipper>

然后是main.java:

public class Main extends Activity implements View.OnClickListener {

    EditText box1, box2;
    ViewFlipper root;

    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        setContentView(R.layout.meta_main);
        box1 = (EditText) findViewById(R.id.editText1);
        box2 = (EditText) findViewById(R.id.editText2);
        root = (ViewFlipper) findViewById(R.id.root);
    }

    public void onClick(View v) {
        EditText editText = null;
        switch (v.getId()) {
            case R.id.button1:
                editText = box1;
                root.showNext();
            break;
            case R.id.button2:
                editText = box2;
                root.showPrevious();
            break;
        }
        if(editText != null) {
            Toast.makeText(this, editText.getText(), Toast.LENGTH_SHORT).show();
        }
    }
}

希望对您有所帮助;)