通过编程错误java.lang.IllegalArgumentException在片段中创建自己的设计

Question

大家好，我刚进入android开发阶段，我正在以编程方式在片段中创建一个不用xml的设计，我试图用java编程地在片段中添加textview和imageview

下面是扩展片段的Tab1类

public class Tab1 extends Fragment {

LinearLayout linearLayout;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.tab1, container, false);

    linearLayout = (LinearLayout)rootView.findViewById(R.id.linear);
    getActivity().setContentView(linearLayout);
    linearLayout.setOrientation(LinearLayout.VERTICAL);

    TextView textView = new TextView(getActivity());
    textView.setText("example");
    textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT));
    linearLayout.addView(textView);

    ImageView imageView = new ImageView(getActivity());
    imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    imageView.setImageResource(R.drawable.placeholder_icon);
    linearLayout.addView(imageView);

    TextView textView2 = new TextView(getActivity());
    textView.setText("example2");
    linearLayout.addView(textView2);

    return rootView;
}

}

这是我的xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.gawapa.exampleproject.MainActivity">

​

但它给了我这个错误

FATAL EXCEPTION: main
Process: com.gawapa.exampleproject, PID: 15104
java.lang.IllegalArgumentException: No view found for id 0x7f0c0071 (com.gawapa.exampleproject:id/container) for fragment Tab2{41eb5380 #1 id=0x7f0c0071 android:switcher:2131492977:1}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1102)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1240)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1088)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:700)
at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1364)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:765)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16677)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5286)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2421)
at android.view.View.measure(View.java:16677)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1927)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1119)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1301)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1006)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5652)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5433)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
    at com.android.internal.os.ZygoteInit.main(Zygote

我怎么才能解决这个问题？我试图使用java编程地在我的片段中添加textview和imageview，但是堆栈跟踪并没有给我错误的代码行

Answer 1

试试这样的..。并删除getActivity().setContentView(linearLayout)；属于活动的范围。

public class Tab1 extends Fragment {

LinearLayout linearLayout;
View rootView

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
   rootView = inflater.inflate(R.layout.tab1, container, false);

   return rootView;
}

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

    linearLayout = (LinearLayout)rootView.findViewById(R.id.linear);

    linearLayout.setOrientation(LinearLayout.VERTICAL);

    TextView textView = new TextView(getActivity());
    textView.setText("example");
    textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT));
    linearLayout.addView(textView);

    ImageView imageView = new ImageView(getActivity());
    imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    imageView.setImageResource(R.drawable.placeholder_icon);
    linearLayout.addView(imageView);

    TextView textView2 = new TextView(getActivity());
    textView.setText("example2");
    linearLayout.addView(textView2);
}
}