android.view.InflateException: ligne fichier XML binaire # 6: Erreur classe EditText

Question

gonflage Je suis en train de gonfler une mise en page dans un fragment et une erreur très frustrant

POURQUOI SEULEMENT erreur entraînant EDITTEXT

Mon mise en page de fragment code usb_view.xml

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

    <EditText 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/editText" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Begin" 
     android:id="@+id/buttonStart" 
     android:layout_below="@+id/editText" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:onClick="onClickStart"/> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Send" 
     android:id="@+id/buttonSend" 
     android:onClick="onClickSend" 
     android:layout_below="@+id/editText" 
     android:layout_toRightOf="@+id/buttonStart" 
     android:layout_toEndOf="@+id/buttonStart" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/textView" 
     android:layout_below="@+id/buttonSend" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_alignRight="@+id/editText" 
     android:layout_alignEnd="@+id/editText" 
     android:layout_alignParentBottom="true" /> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Stop" 
     android:id="@+id/buttonStop" 
     android:layout_below="@+id/editText" 
     android:layout_toRightOf="@+id/buttonSend" 
     android:layout_toEndOf="@+id/buttonSend" 
     android:onClick="onClickStop"/> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Clear" 
     android:id="@+id/buttonClear" 
     android:layout_below="@+id/editText" 
     android:layout_toRightOf="@+id/buttonStop" 
     android:layout_toEndOf="@+id/buttonStop" 
     android:onClick="onClickClear"/> 
</LinearLayout> 

Mon code fragment Usb.java

package com.example.rajat.blueusb 
import android.app.Fragment; 
import android.app.PendingIntent; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.hardware.usb.UsbDevice; 
import android.hardware.usb.UsbDeviceConnection; 
import android.hardware.usb.UsbManager; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 

import com.felhr.usbserial.UsbSerialDevice; 
import com.felhr.usbserial.UsbSerialInterface; 

import java.io.UnsupportedEncodingException; 
import java.util.HashMap; 
import java.util.Map; 

public class Usb extends Fragment { 
    public Usb(){} 


    public final String ACTION_USB_PERMISSION = "com.example.rajat.blueusb.USB_PERMISSION"; 
    Button startButton, sendButton, clearButton, stopButton; 
    TextView textView; 
    EditText editText; 
    UsbManager usbManager; 
    UsbDevice device; 
    UsbSerialDevice serialPort; 
    UsbDeviceConnection connection; 

    UsbSerialInterface.UsbReadCallback mCallback = new UsbSerialInterface.UsbReadCallback() { //Defining a Callback which triggers whenever data is read. 
     @Override 
     public void onReceivedData(byte[] arg0) { 
      String data = null; 
      try { 
       data = new String(arg0, "UTF-8"); 
       data.concat("/n"); 
       tvAppend(textView, data); 
      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 


     } 
    }; 
    private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { //Broadcast Receiver to automatically start and stop the Serial connection. 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      if (intent.getAction().equals(ACTION_USB_PERMISSION)) { 
       boolean granted = intent.getExtras().getBoolean(UsbManager.EXTRA_PERMISSION_GRANTED); 
       if (granted) { 
        connection = usbManager.openDevice(device); 
        serialPort = UsbSerialDevice.createUsbSerialDevice(device, connection); 
        if (serialPort != null) { 
         if (serialPort.open()) { //Set Serial Connection Parameters. 
          setUiEnabled(true); 
          serialPort.setBaudRate(9600); 
          serialPort.setDataBits(UsbSerialInterface.DATA_BITS_8); 
          serialPort.setStopBits(UsbSerialInterface.STOP_BITS_1); 
          serialPort.setParity(UsbSerialInterface.PARITY_NONE); 
          serialPort.setFlowControl(UsbSerialInterface.FLOW_CONTROL_OFF); 
          serialPort.read(mCallback); 
          tvAppend(textView,"Serial Connection Opened!\n"); 

         } else { 
          Log.d("SERIAL", "PORT NOT OPEN"); 
         } 
        } else { 
         Log.d("SERIAL", "PORT IS NULL"); 
        } 
       } else { 
        Log.d("SERIAL", "PERM NOT GRANTED"); 
       } 
      } else if (intent.getAction().equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) { 
       onClickStart(startButton); 
      } else if (intent.getAction().equals(UsbManager.ACTION_USB_DEVICE_DETACHED)) { 
       onClickStop(stopButton); 

      } 
     } 

     ; 
    }; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View rootView = inflater.inflate(R.layout.usb_view, container, false); 
     usbManager = (UsbManager) getActivity(). getSystemService(Context.USB_SERVICE); 
     startButton = (Button)getView(). findViewById(R.id.buttonStart); 
     sendButton = (Button)getView(). findViewById(R.id.buttonSend); 
     clearButton = (Button)getView(). findViewById(R.id.buttonClear); 
     stopButton = (Button)getView(). findViewById(R.id.buttonStop); 
     editText = (EditText)getView().findViewById(R.id.editText); 
     textView = (TextView)getView().findViewById(R.id.textView); 
     setUiEnabled(false); 
     IntentFilter filter = new IntentFilter(); 
     filter.addAction(ACTION_USB_PERMISSION); 
     filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); 
     filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); 
     getActivity().registerReceiver(broadcastReceiver, filter); 

     return rootView; 
    } 

    public void setUiEnabled(boolean bool) { 
     startButton.setEnabled(!bool); 
     sendButton.setEnabled(bool); 
     stopButton.setEnabled(bool); 
     textView.setEnabled(bool); 

    } 

    public void onClickStart(View view) { 

     HashMap<String, UsbDevice> usbDevices = usbManager.getDeviceList(); 
     if (!usbDevices.isEmpty()) { 
      boolean keep = true; 
      for (Map.Entry<String, UsbDevice> entry : usbDevices.entrySet()) { 
       device = entry.getValue(); 
       int deviceVID = device.getVendorId(); 

       if (deviceVID ==1659)//Arduino Vendor ID 
       { 
        PendingIntent pi = PendingIntent.getBroadcast(getActivity().getApplicationContext(), 0, new Intent(ACTION_USB_PERMISSION), 0); 
        usbManager.requestPermission(device, pi); 
        keep = false; 

        break; 
       } else { 
        connection = null; 
        device = null; 
       } 

       if (!keep) 
        break; 
      } 
     } 
    } 

    public void onClickSend(View view) { 
     String string = editText.getText().toString(); 
     serialPort.write(string.getBytes()); 
     tvAppend(textView, "\nData Sent : " + string + "\n"); 
    } 

    public void onClickStop(View view) { 
     setUiEnabled(false); 
     serialPort.close(); 
     tvAppend(textView,"\nSerial Connection Closed! \n"); 

    } 

    public void onClickClear(View view) { 
     textView.setText(" "); 
    } 

    private void tvAppend(TextView tv, CharSequence text) { 
     final TextView ftv = tv; 
     final CharSequence ftext = text; 

     getActivity().runOnUiThread(new Runnable() { 
      @Override 
      public void run() { 
       ftv.append(ftext); 
      } 
     }); 
    } 

} 

Mon code MainActivity.java

package com.example.rajat.blueusb; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.view.View; 
import android.support.design.widget.NavigationView; 
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.app.Fragment; 
import android.app.FragmentManager; 
public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    @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 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) { 
     // Handle navigation view item clicks here. 
     Fragment fragment=null; 
     int id = item.getItemId(); 

     if (id == R.id.nav_usb) { 
      fragment = new Usb(); 
     } else if (id == R.id.nav_blue) { 
      fragment = new Bluetooth(); 

     } 

     if (fragment != null) { 
      FragmentManager fragmentManager = getFragmentManager(); 
      fragmentManager.beginTransaction() 
        .replace(R.id.content_main, fragment).commit(); 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 
} 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:fitsSystemWindows="true" 
    tools:openDrawer="start"> 

    <include 
     layout="@layout/app_bar_main" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

    <android.support.design.widget.NavigationView 
     android:id="@+id/nav_view" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:fitsSystemWindows="true" 
     app:headerLayout="@layout/nav_header_main" 
     app:menu="@menu/activity_main_drawer" /> 


</android.support.v4.widget.DrawerLayout> 

LogCat:

android.view.InflateException: Binary XML file line #6: Error inflating class EditText 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
    at com.example.rajat.blueusb.Usb.onCreateView(Usb.java:109) 
    at android.app.Fragment.performCreateView(Fragment.java:2069) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1072) 

Answer 1

Vous ne pouvez pas aligner votre vue à gauche et à droite en même temps.
Si vous wan't pour aligner votre EditText à gauche:

<EditText 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/editText" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentStart="true" /> 

Answer 2

changement import android.app.Fragment; à

import android.support.v4.app.Fragment; 
public class Usb extends Fragment