Java EditText字段获得不正确的输出
因此,我有一个测试应用程序,我试图让两个片段通过Java EditText字段获得不正确的输出,java,android-fragments,android-studio,android-bundle,fragmentmanager,Java,Android Fragments,Android Studio,Android Bundle,Fragmentmanager,因此,我有一个测试应用程序,我试图让两个片段通过MainActivity进行通信。经过一些研究,我成功地将数据从MainFragment传递到FragmentTwo。然而,每当我从MainFragment传入字符串值时,就会收到一条消息 “android.support.v7.widget.AppCompatiEditText{cce883f VFED。。。。。 app:id/editText}” 我找不到这个案子的问题所在。请帮忙。 顺便说一句,我知道如何使用意图,它们(有时)比片段灵活得多,
MainActivity
进行通信。经过一些研究,我成功地将数据从MainFragment
传递到FragmentTwo
。然而,每当我从MainFragment
传入字符串值时,就会收到一条消息
“android.support.v7.widget.AppCompatiEditText{cce883f VFED。。。。。
app:id/editText}”
我找不到这个案子的问题所在。请帮忙。
顺便说一句,我知道如何使用意图,它们(有时)比片段灵活得多,但这只是为了让我知道我可以使用片段走多远
这是我的主要活动
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener, MainFragment.OnHeadlineSelectedListener {
private String dataReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void sendInformations(String message) {
FragmentTwo fragmentTwo = new FragmentTwo();
Bundle args = new Bundle();
args.putString(fragmentTwo.DATA_RECEIVE, message);
fragmentTwo.setArguments(args);
getFragmentManager().beginTransaction()
.replace(R.id.container, fragmentTwo)
.commit();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
FragmentManager fragmentManager = getFragmentManager();
int id = item.getItemId();
if (id == R.id.frag_one) {
fragmentManager.beginTransaction().replace(R.id.container, new FragmentOne()).commit();
} else if (id == R.id.frag_two) {
fragmentManager.beginTransaction().replace(R.id.container, new FragmentTwo()).commit();
} else if (id == R.id.frag_three) {
fragmentManager.beginTransaction().replace(R.id.container, new FragmentThree()).commit();
} else if (id == R.id.frag_four) {
fragmentManager.beginTransaction().replace(R.id.container, new FragmentFour()).commit();
} else if (id == R.id.main_frag) {
fragmentManager.beginTransaction().replace(R.id.container, new MainFragment()).commit();
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
主片段类
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
public class MainFragment extends Fragment {
OnHeadlineSelectedListener mCallback;
Button sendData;
public interface OnHeadlineSelectedListener {
public void sendInformations(String message);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallback = (OnHeadlineSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.main_fragment, container, false);
final EditText userInput = (EditText) rootView.findViewById(R.id.editText);
sendData = (Button) rootView.findViewById(R.id.button);
sendData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (v.getId() == R.id.button) {
mCallback.sendInformations(userInput.toString());
}
}
});
return rootView;
}
}
零碎的两类
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class FragmentTwo extends Fragment {
final static String DATA_RECEIVE = "data_receive";
TextView textView;
String input;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_two, container, false);
textView = (TextView) rootView.findViewById(R.id.data_receiver2);
savedInstanceState = getArguments();
if(savedInstanceState != null) {
input = savedInstanceState.getString(DATA_RECEIVE);
}
textView.setText(input);
return rootView;
}
}
哦,我收到的信息是,当我运行应用程序,在文本字段中键入,然后按下按钮,我会收到奇怪的信息。如果有人能告诉我是什么导致了这种奇怪的输出,我将不胜感激
如果这是一个bug(我在某些情况下注意到了这一点),是因为我不推荐使用v7.Fragment&v7.FragmentManager吗?您基本上是以字符串形式传递EditText,而不是EditText值 在MainFragment中,更改mCallback.sendInformations(userInput.toString())to
mCallback.sendInformations(userInput.getText().toString())代码>
多谢各位。这似乎解决了问题。干杯!很高兴我能帮忙。
sendData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (v.getId() == R.id.button) {
mCallback.sendInformations(userInput.getText().toString());
}
}
});