简单对话框中的 ViewPager

Question

我想在对话框中使用 ViewPager，但失败了！这是所有的代码。对话框中将显示两个片段：

布局

ma​​in.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Main" >

<Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="dialog" />

</RelativeLayout>

details.xml（片段布局）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/detailsText"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="center_horizontal|center_vertical"
    android:layout_marginTop="20dip"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="30dip" />

</LinearLayout>

image.xml（片段布局）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:src="@drawable/ic_launcher" />

</LinearLayout>

dialog.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="1" />

<com.viewpagerindicator.CirclePageIndicator
    android:id="@+id/indicator"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="10dip" />

</LinearLayout>

Main.java

public class Main extends FragmentActivity {

private Button button;

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

    setupUIComponents();
    setupListeners();
}

private void setupUIComponents() {
    button = (Button) findViewById(R.id.button);
}

private void setupListeners() {
    button.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            MyDialog dialog = new MyDialog(Main.this);
            dialog.startDialog();
        }
    });
}
}

MyDialog.java

public class MyDialog extends FragmentActivity {

private Dialog dialog;
private Context context;
private CirclePageIndicator mIndicator;
private Main mMain;
private ViewPager mPager;
private FragmentAdapter mAdapter;

public MyDialog(Context context) {
    super();
    this.context = context;
    this.mMain = (Main) context;
}

public void startDialog() {
    dialog = new Dialog(context);
    dialog.setContentView(R.layout.dialog);

    mAdapter = new FragmentAdapter(mMain.getSupportFragmentManager());
    mPager = (ViewPager) dialog.findViewById(R.id.pager);
    mPager.setAdapter(mAdapter);

    mIndicator = (CirclePageIndicator) dialog.findViewById(R.id.indicator);
    mIndicator.setViewPager(mPager);
    mIndicator.setCurrentItem(0);

    dialog.show();
}

}

FragmentAdapter.java

public class FragmentAdapter extends FragmentPagerAdapter {
public FragmentAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int which) {
    switch (which) {
        case 0:
            ImageFragment imageFragment = new ImageFragment();
            return imageFragment;
        case 1:
            DetailFragment detailsFragment = new DetailFragment();
            return detailsFragment;
    }
    return null;
}

@Override
public int getCount() {
    return 2;
}

}

DetailsFragment.java

public class DetailFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
    View view = inflater.inflate(R.layout.details, container, false);
    TextView textView = (TextView) view.findViewById(R.id.detailsText);
    textView.setText("Testing");
    return view;
}
}

ImageFragment.java

public class ImageFragment extends Fragment {

public ImageFragment() {
}

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

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
    View view = inflater.inflate(R.layout.image, container, false);
    ImageView imageView = (ImageView) view.findViewById(R.id.imageView1);
    imageView.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher));
    return view;
}
}

为了快速总结代码，Main.java 被启动，点击按钮将在视图分页器中启动一个包含两个片段的对话框。

有堆栈跟踪：

12-11 11:28:15.999: E/AndroidRuntime(7453): FATAL EXCEPTION: main
12-11 11:28:15.999: E/AndroidRuntime(7453): java.lang.IllegalArgumentException: No view found for id 0x7f040006 for fragment ImageFragment{410a2468 #0 id=0x7f040006 android:switcher:2130968582:0}
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:864)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1080)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:622)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:139)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.view.ViewPager.populate(ViewPager.java:804)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1016)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2148)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.View.measure(View.java:15172)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1850)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1077)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1275)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4214)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.Choreographer.doCallbacks(Choreographer.java:555)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.Choreographer.doFrame(Choreographer.java:525)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.os.Handler.handleCallback(Handler.java:615)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.os.Handler.dispatchMessage(Handler.java:92)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.os.Looper.loop(Looper.java:137)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at android.app.ActivityThread.main(ActivityThread.java:4966)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at java.lang.reflect.Method.invokeNative(Native Method)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at java.lang.reflect.Method.invoke(Method.java:511)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
12-11 11:28:15.999: E/AndroidRuntime(7453):     at dalvik.system.NativeStart.main(Native Method)

再次，是否可以在对话框的视图页面中显示片段？如果是这样，我哪里出错了？

Answer 1

再次，是否可以在对话框中的 viewpager 中显示片段？

是的，但不是您尝试的方式（如果我没有遗漏您的代码中的某些内容），ViewPager 将无法附加那些位于对话框中的子 Fragments。 4.2 API 级别带来了nested Fragments（但也适用于具有新版本兼容包的较低版本），您应该使用它来显示“对话片段”。

在您的Main 活动中，您将创建一个DialogFragment，并在该DialogFragment 中设置ViewPager 并将getChildFragmentManager() 传递给它的适配器。

另外，只需在 Main 活动中使用移动 startDialog() 方法，不要实例化一个新的 Activity，因为这不是 Android 的方式（在你的情况下它可以工作因为你没有用它做任何事情）。