Фрагмент деятельности Фрагмент связи
у меня естьДеятельность с двумя фрагментами (Frag1, Frag2).
ВFrag1, У меня естьРедактировать текст.
Пока вFrag2, У меня естькнопка а такжеTextView.
Что я пытаюсь сделать, так это то, что все, что я набрал в EditText, появится в Textview, когда я нажму кнопку. Вот мой код, но он не работает, потому что мое приложение вылетает, когда я пытаюсь его запустить:
Frag1:
public class Frag1 extends Fragment {
EditText edit1;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.frag2, container, false);
edit1 = (EditText) getActivity().findViewById(R.id.edit_1);
String str = edit1.getText().toString();
Intent intent = new Intent(getActivity().getBaseContext(),
MainActivity.class);
intent.putExtra("message", str);
getActivity().startActivity(intent);
return v;
}
}
Деятельность:
public class MainActivity extends FragmentActivity{
ViewPager viewPager = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
FragmentManager fragmentManager = getSupportFragmentManager();
viewPager.setAdapter(new MyAdapter(fragmentManager));
Intent intent = getIntent();
String message = intent.getStringExtra("message");
Bundle bundle=new Bundle();
bundle.putString("message", message);
Frag2 fragobj=new Frag2();
fragobj.setArguments(bundle);
}
public class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter (FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
Fragment fragment = null;
if (i == 0)
{
fragment = new Frag1();
}
if (i == 1)
{
fragment = new Frag2();
}
return fragment;
}
@Override
public int getCount() {
return 2;
}
}
}
Frag2:
public class Frag2 extends Fragment implements OnClickListener {
Button button1;
TextView text1;
String strtext;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.frag2, container, false);
button1 = (Button) getActivity().findViewById(R.id.button1);
button1.setOnClickListener(this);
text1 = (TextView) getActivity().findViewById(R.id.text1);
strtext=getArguments().getString("message");
return v;
}
@Override
public void onClick(View arg0) {
text1.setText(strtext);
}
}
LogCat:
12-01 02:47:22.763: D/jdwp(4115): sendBufferedRequest : len=0x31
12-01 02:47:22.769: W/asset(4115): AssetManager-->addDefaultAssets CIP path not exsit!
12-01 02:47:23.061: V/PhoneWindow(4115): DecorView setVisiblity: visibility = 4
12-01 02:47:23.084: V/PhoneWindow(4115): DecorView setVisiblity: visibility = 0
12-01 02:47:23.160: D/AndroidRuntime(4115): Shutting down VM
12-01 02:47:23.160: W/dalvikvm(4115): threadid=1: thread exiting with uncaught exception (group=0x40d819a8)
12-01 02:47:23.178: E/AndroidRuntime(4115): FATAL EXCEPTION: main
12-01 02:47:23.178: E/AndroidRuntime(4115): java.lang.NullPointerException
12-01 02:47:23.178: E/AndroidRuntime(4115): at lmf.sample5.Frag1.onCreateView(Frag1.java:21)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.View.measure(View.java:15635)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.View.measure(View.java:15635)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.widget.LinearLayout.measureVertical(LinearLayout.java:850)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.View.measure(View.java:15635)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-01 02:47:23.178: E/AndroidRuntime(4115): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2200)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.View.measure(View.java:15635)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2165)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1249)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1443)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4872)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.Choreographer.doCallbacks(Choreographer.java:579)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.Choreographer.doFrame(Choreographer.java:548)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.os.Handler.handleCallback(Handler.java:800)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.os.Handler.dispatchMessage(Handler.java:100)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.os.Looper.loop(Looper.java:194)
12-01 02:47:23.178: E/AndroidRuntime(4115): at android.app.ActivityThread.main(ActivityThread.java:5371)
12-01 02:47:23.178: E/AndroidRuntime(4115): at java.lang.reflect.Method.invokeNative(Native Method)
12-01 02:47:23.178: E/AndroidRuntime(4115): at java.lang.reflect.Method.invoke(Method.java:525)
12-01 02:47:23.178: E/AndroidRuntime(4115): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
12-01 02:47:23.178: E/AndroidRuntime(4115): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
12-01 02:47:23.178: E/AndroidRuntime(4115): at dalvik.system.NativeStart.main(Native Method)