添加setText到主要活动应用程序突然停止

-1

我输入要在我的主要活动中使用setText到TextView。我的应用程序停止工作，请参阅我的nav_header.xml。添加setText到主要活动应用程序突然停止

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

    <ImageView 
     android:id="@+id/social_image" 
     android:layout_width="match_parent" 
     android:layout_height="200dp" 
     android:layout_gravity="center_horizontal" 
     android:contentDescription="@string/cd_main_image" 
     android:scaleType="centerCrop" 
     android:src="@drawable/left_menu_social_small" /> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:gravity="center_vertical" 
     android:orientation="vertical" 
     android:layout_centerVertical="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="center_vertical" > 

      <com.facebook.login.widget.ProfilePictureView 
       android:id="@+id/profimage" 
       android:layout_width="72dp" 
       android:layout_height="72dp" 
       android:layout_margin="20dp" 
       android:src="@drawable/ic_person"/> 

      <LinearLayout 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_centerInParent="true" 
       android:layout_marginLeft="4dp" 
       android:gravity="center_vertical" 
       android:orientation="vertical" > 

       <zesteve.com.myapplication.font.RobotoTextView 
        android:id="@+id/user_name" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_marginBottom="4dp" 
        android:text="Ravi Shankar" 
        android:textColor="@android:color/white" 
        android:textSize="24sp" 
        app:typeface="robotoLight" /> 

       <zesteve.com.myapplication.font.RobotoTextView 
        android:id="@+id/user_location" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="from Visakhapatnam" 
        android:textColor="@android:color/white" 
        android:textSize="12sp" 
        app:typeface="robotoLight" /> 
      </LinearLayout> 
     </LinearLayout> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:gravity="center_vertical" 
      android:orientation="vertical" > 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:gravity="center_vertical" 
       android:orientation="horizontal" > 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:gravity="center_vertical" 
        android:orientation="horizontal" > 

        <zesteve.com.myapplication.font.MaterialDesignIconsTextView 
         android:id="@+id/icon_friends" 
         style="@style/TextViewAppearance.Title1" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="32dp" 
         android:padding="0dp" 
         android:text="@string/material_icon_account_multiple" 
         android:textColor="@color/main_color_500" 
         android:textSize="22dp" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/number_of_friends" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:layout_marginRight="4dp" 
         android:text="152" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoBold" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/fb_gend" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:text="friends" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoLight" /> 
       </LinearLayout> 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:gravity="center_vertical" 
        android:orientation="horizontal" > 

        <zesteve.com.myapplication.font.MaterialDesignIconsTextView 
         android:id="@+id/icon_message" 
         style="@style/TextViewAppearance.Title1" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:padding="0dp" 
         android:text="@string/material_icon_message" 
         android:textColor="@color/main_color_500" 
         android:textSize="22dp" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/number_of_messages" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:layout_marginRight="4dp" 
         android:text="15" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoBold" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/fb_id" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:text="messages" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoLight" /> 
       </LinearLayout> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:gravity="center_vertical" 
       android:orientation="horizontal" > 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:gravity="center_vertical" 
        android:orientation="horizontal" > 

        <zesteve.com.myapplication.font.MaterialDesignIconsTextView 
         android:id="@+id/icon_photos" 
         style="@style/TextViewAppearance.Title1" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="32dp" 
         android:padding="0dp" 
         android:text="@string/material_icon_image_box" 
         android:textColor="@color/main_color_500" 
         android:textSize="22dp" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/number_of_photos" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:layout_marginRight="4dp" 
         android:text="22" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoBold" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:text="photos" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoLight" /> 
       </LinearLayout> 

       <LinearLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:gravity="center_vertical" 
        android:orientation="horizontal" > 

        <zesteve.com.myapplication.font.MaterialDesignIconsTextView 
         android:id="@+id/icon_videos" 
         style="@style/TextViewAppearance.Title1" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:padding="0dp" 
         android:text="@string/material_icon_video" 
         android:textColor="@color/main_color_500" 
         android:textSize="22dp" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/number_of_videos" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_marginLeft="8dp" 
         android:layout_marginRight="4dp" 
         android:text="2" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoBold" /> 

        <zesteve.com.myapplication.font.RobotoTextView 
         android:id="@+id/fb_email" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:text="videos" 
         android:textColor="@android:color/white" 
         android:textSize="12sp" 
         app:typeface="robotoLight" /> 
       </LinearLayout> 
      </LinearLayout> 
     </LinearLayout> 
    </LinearLayout> 

    <View 
     android:id="@+id/divider_top" 
     android:layout_width="match_parent" 
     android:layout_height="3dp" 
     android:layout_alignParentLeft="true" 
     android:layout_below="@id/social_image" 
     android:background="@color/material_light_yellow_600" /> 

</RelativeLayout>

和我activity_main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:fitsSystemWindows="true" 
    android:orientation="vertical" 
    android:background="@color/main_color_grey_300" 
    tools:context="zesteve.com.myapplication.MainActivity"> 


<android.support.v7.widget.Toolbar 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="@color/cpb_blue" 
    android:id="@+id/toolbar" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
    app:title="Select Your Location" /> 

<android.support.v4.widget.DrawerLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_height="match_parent" 
    android:layout_width="match_parent" 
    android:id="@+id/drawerLayout" > 

    <FrameLayout 
     android:orientation="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/containerView"> 
    </FrameLayout> 

    <android.support.design.widget.NavigationView 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:id="@+id/shitstuff" 
     app:itemTextColor="@color/white" 
     app:headerLayout="@layout/nav_header" 
     app:menu="@menu/drawermenu" 

     /> 

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

</LinearLayout>

和MainActiviry是

package zesteve.com.myapplication; 

import android.content.Intent; 
import android.net.Uri; 
import android.os.Handler; 
import android.support.design.widget.NavigationView; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.text.Html; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.bumptech.glide.Glide; 
import com.facebook.login.widget.ProfilePictureView; 

import static zesteve.com.myapplication.R.attr.headerLayout; 
import static zesteve.com.myapplication.R.attr.layout; 

public class MainActivity extends AppCompatActivity { 
    DrawerLayout mDrawerLayout; 
    NavigationView mNavigationView; 
    FragmentManager mFragmentManager; 
    FragmentTransaction mFragmentTransaction; 
    Session session; 

    TextView fbuname , fbulocation , fbuid , fbuemail , fbugend ; 
    ImageView fbpropic; 



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

     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); 
     mNavigationView = (NavigationView) findViewById(R.id.shitstuff) ; 

     session= new Session(MainActivity.this); 

     fbuname = (TextView) findViewById(R.id.user_name); 
     fbulocation = (TextView) findViewById(R.id.user_location); 
     //fbuid = (TextView) findViewById(R.id.fb_id); 
     //fbuemail = (TextView) findViewById(R.id.fb_email); 
     //fbugend = (TextView) findViewById(R.id.fb_gend); 


     //fbulocation.setText("Hyderabad"); 
     fbuname.setText("Ramachandra"); 





     mFragmentManager = getSupportFragmentManager(); 
     mFragmentTransaction = mFragmentManager.beginTransaction(); 
     mFragmentTransaction.replace(R.id.containerView,new TabFragment()).commit(); 

     mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { 
      @Override 
      public boolean onNavigationItemSelected(MenuItem menuItem) { 
       mDrawerLayout.closeDrawers(); 



       if (menuItem.getItemId() == R.id.settings) { 
        FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction(); 
        fragmentTransaction.replace(R.id.containerView,new SentFragment()).commit(); 

       } 

       if (menuItem.getItemId() == R.id.home) { 
        FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction(); 
        xfragmentTransaction.replace(R.id.containerView,new TabFragment()).commit(); 
       } 


       if (menuItem.getItemId() == R.id.logout){ 

        finish(); 
        startActivity(new Intent(MainActivity.this, LoginActivity.class)); 
       } 

       return false; 
      } 

     }); 



     android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar); 
     ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout, toolbar,R.string.app_name, 
       R.string.app_name); 

     mDrawerLayout.setDrawerListener(mDrawerToggle); 

     mDrawerToggle.syncState(); 

    } 



    boolean doubleBackToExitPressedOnce = false; 

    @Override 
    public void onBackPressed() { 
     if (doubleBackToExitPressedOnce) { 
      super.onBackPressed(); 
      return; 
     } 

     this.doubleBackToExitPressedOnce = true; 
     Toast.makeText(this, "Please click BACK again to exit", Toast.LENGTH_SHORT).show(); 

     new Handler().postDelayed(new Runnable() { 

      @Override 
      public void run() { 
       doubleBackToExitPressedOnce=false; 
      } 
     }, 2000); 
    } 


}

nav_header.xml是抽屉菜单标题。我正在使用setText在TextView中绑定显示名称。但我的应用程序突然停止。

logcat的

05-03 23:06:16.764 2439-2439/zesteve.com.myapplication E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.internal.zzadf.zzg 
05-03 23:06:20.376 2439-2439/zesteve.com.myapplication E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering 
05-03 23:06:20.388 2439-2439/zesteve.com.myapplication E/AndroidRuntime: FATAL EXCEPTION: main 
                     java.lang.RuntimeException: Unable to start activity ComponentInfo{zesteve.com.myapplication/zesteve.com.myapplication.MainActivity}: java.lang.NullPointerException 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
                      at android.app.ActivityThread.access$600(ActivityThread.java:141) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
                      at android.os.Handler.dispatchMessage(Handler.java:99) 
                      at android.os.Looper.loop(Looper.java:137) 
                      at android.app.ActivityThread.main(ActivityThread.java:5041) 
                      at java.lang.reflect.Method.invokeNative(Native Method) 
                      at java.lang.reflect.Method.invoke(Method.java:511) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
                      at dalvik.system.NativeStart.main(Native Method) 
                      Caused by: java.lang.NullPointerException 
                      at zesteve.com.myapplication.MainActivity.onCreate(MainActivity.java:55) 
                      at android.app.Activity.performCreate(Activity.java:5104) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)  
                      at android.app.ActivityThread.access$600(ActivityThread.java:141)  
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)  
                      at android.os.Handler.dispatchMessage(Handler.java:99)  
                      at android.os.Looper.loop(Looper.java:137)  
                      at android.app.ActivityThread.main(ActivityThread.java:5041)  
                      at java.lang.reflect.Method.invokeNative(Native Method)  
                      at java.lang.reflect.Method.invoke(Method.java:511)  
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)  
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)  
                      at dalvik.system.NativeStart.main(Native Method)

TabFragment.java

import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.design.widget.TabLayout; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

import zesteve.com.myapplication.R; 


public class TabFragment extends Fragment { 

    public static TabLayout tabLayout; 
    public static ViewPager viewPager; 
    public static int int_items = 3 ; 

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

      View x = inflater.inflate(R.layout.tab_layout,null); 
      tabLayout = (TabLayout) x.findViewById(R.id.tabs); 
      viewPager = (ViewPager) x.findViewById(R.id.viewpager); 


     viewPager.setAdapter(new MyAdapter(getChildFragmentManager())); 


     tabLayout.post(new Runnable() { 
      @Override 
      public void run() { 
        tabLayout.setupWithViewPager(viewPager); 
        } 
     }); 

     return x; 

    } 

    class MyAdapter extends FragmentPagerAdapter{ 

     public MyAdapter(FragmentManager fm) { 
      super(fm); 
     } 



     @Override 
     public Fragment getItem(int position) 
     { 
      switch (position){ 
       case 0 : return new PrimaryFragment(); 
       case 1 : return new SocialFragment(); 
       case 2 : return new UpdatesFragment(); 
      } 
     return null; 
     } 

     @Override 
     public int getCount() { 

      return int_items; 

     } 



     @Override 
     public CharSequence getPageTitle(int position) { 

      switch (position){ 
       case 0 : 
        return "Category"; 
       case 1 : 
        return "Events"; 
       case 2 : 
        return "Updates"; 
      } 
       return null; 
     } 
    } 

}

请评论，如果您有任何疑问。

来源

2017-05-03 Asesha George

把你的堆栈跟踪这里 –

是其附加刚才说了NullPointerException异常 –

为什么下降投票？ –

您必须使用导航header view的参考才能使用TextView（user_name和user_location）。如下

更新MainActivity：

public class MainActivity extends AppCompatActivity { 

    DrawerLayout mDrawerLayout; 
    NavigationView mNavigationView; 
    FragmentManager mFragmentManager; 
    FragmentTransaction mFragmentTransaction; 
    Session session; 

    TextView fbuname , fbulocation , fbuid , fbuemail , fbugend ; 
    ImageView fbpropic; 

    // NavigationView Header 
    View mHeaderView; 

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

     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); 
     mNavigationView = (NavigationView) findViewById(R.id.shitstuff) ; 

     session= new Session(MainActivity.this); 

     // NavigationView Header 
     mHeaderView = mNavigationView.getHeaderView(0); 

     // Views 
     fbuname = (TextView) mHeaderView.findViewById(R.id.user_name); 
     fbulocation = (TextView) mHeaderView.findViewById(R.id.user_location); 

     // Set text 
     fbulocation.setText("Hyderabad"); 
     fbuname.setText("Ramachandra"); 

     ........... 
     ...................... 
    } 
}

希望这将有助于〜

来源

2017-05-03 19:06:22 FAT

是的，它真的帮助谢谢你。它工作炉排 –

高兴地帮助:) – FAT

添加setText到主要活动应用程序突然停止

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