片段和活动未显示布局（所有活动和片段均为空白）

时间：2014-06-20 21:32:09

标签： android android-layout android-activity android-fragments

我的android项目有问题。今天我打开了一个我正在研究的项目，当我运行它时，所有活动和片段都是空白的，就像我没有设置布局一样，但在我的代码中，一切正常，所有方法都被正确调用

最奇怪的是，当我尝试打开旧项目（已完成且工作正常）时，问题也会发生。我确定这不是代码或IDE的问题（我在eclipse和android studio中执行了代码并且问题仍然存在于booth中）。有人知道它会是什么吗？

1 个答案:

答案 0 :(得分：0)

我使用了这些教程（Android Developer）：

Creating a Navigation Drawer

Fragments

我的代码如下。

<强> activity_navigation_drawer.xml 

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

<android.support.v4.view.ViewPager 
android:id="@+id/content_frame" 
android:layout_width="match_parent" 
android:layout_height="match_parent"/>

<ListView android:id="@+id/left_drawer" 
android:layout_width="240dp" 
android:layout_height="match_parent" 
android:layout_gravity="start" 
android:choiceMode="singleChoice" 
android:divider="@android:color/transparent" 
android:dividerHeight="0dp" 
android:background="#ffff"/>

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

NavigationDrawer.java（启动器活动） 

package recode.mygv.view;

import android.app.Activity;
import android.app.Fragment;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;


public class NavigationDrawer extends Activity implements AdapterView.OnItemClickListener {

private DrawerLayout mDrawerLayout;
private ListView mDrawerLista;
private static ActionBarDrawerToggle mDrawerToggle;
private AdapterDrawerItem adapterCustomDrawer;
private DrawerControl drawerControl;



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

    getActionBar().setDisplayHomeAsUpEnabled(true);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerLista = (ListView) findViewById(R.id.left_drawer);

    drawerControl = new DrawerControl(this);
    drawerControl.setDrawerItens();

    adapterCustomDrawer = new AdapterDrawerItem(this,drawerControl);
    mDrawerLista.setAdapter(adapterCustomDrawer);
    mDrawerLista.setOnItemClickListener(this);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, R.string.drawer_abrir,
            R.string.drawer_fechar) {

        public void onDrawerClosed(View view) {
            super.onDrawerClosed(view);
            getActionBar().setTitle("A");
            invalidateOptionsMenu();
        }

        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle("B");
            invalidateOptionsMenu();
        }
    };

    mDrawerLayout.setDrawerListener(mDrawerToggle);

    if(savedInstanceState == null) {

        selectItem(0);
    }
}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggles
    mDrawerToggle.onConfigurationChanged(newConfig);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }

    return false;
}

public void selectItem(int position) {

    Fragment fragment = null;

    switch (position) {

        case 0:

            fragment = new FragmentClienteNovo();
            break;

        default:
            break;
    }

    android.app.FragmentManager frgManager = getFragmentManager();
    frgManager.beginTransaction().replace(R.id.content_frame, fragment)
            .commit();

    mDrawerLayout.closeDrawer(mDrawerLista);

}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    selectItem(position);
  }
}

<强> fragment_cliente_novo.xml 

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/scrollView1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_centerHorizontal="true" android:layout_centerVertical="true">
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical">
        <EditText android:id="@+id/editText_cliente_nome" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_nome" android:inputType="textPersonName">
            <requestFocus/>
        </EditText>
        <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:text="@string/cliente_tel" android:textAppearance="?android:attr/textAppearanceMedium"/>
        <View android:id="@+id/view_linha" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_marginLeft="3dp" android:layout_marginRight="3dp" android:background="@color/Black"/>
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content">
            <EditText android:id="@+id/editText_cliente_tel_cel1" android:layout_width="160dp" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_tel_cel1" android:inputType="phone"/>
            <Spinner android:id="@+id/spinner_clinte_tel_cel_operadora1" android:layout_width="130dp" android:layout_height="33dp" android:layout_marginLeft="3dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp"/>
        </LinearLayout>
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content">
            <EditText android:id="@+id/editText_cliente_tel_cel2" android:layout_width="160dp" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_tel_cel2" android:inputType="phone"/>
            <Spinner android:id="@+id/spinner_cliente_tel_cel_operadora2" android:layout_width="130dp" android:layout_height="32dp" android:layout_marginLeft="3dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp"/>
        </LinearLayout>
        <EditText android:id="@+id/editText_cliente_tel_casa" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_tel_casa" android:inputType="phone"/>
        <EditText android:id="@+id/editText_cliente_tel_tabalho" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_tel_trabalho" android:inputType="phone"/>
        <TextView android:id="@+id/TextView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:text="@string/cliente_trabalho" android:textAppearance="?android:attr/textAppearanceMedium"/>
        <View android:id="@+id/View_linha2" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_marginLeft="3dp" android:layout_marginRight="3dp" android:background="@color/Black"/>
        <EditText android:id="@+id/editText_cliente_trabalho_empresa" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_empresa"/>
        <EditText android:id="@+id/editText_cliente_trabalho_ocupacao" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_ocupacao"/>
        <EditText android:id="@+id/editText_cliente_trabalho_cidade" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_cidade"/>
        <EditText android:id="@+id/editText_cliente_trabalho_bairro" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_bairro"/>
        <EditText android:id="@+id/editText_cliente_trabalho_endereco" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_endereco"/>
        <TextView android:id="@+id/TextView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:text="@string/cliente_residencia" android:textAppearance="?android:attr/textAppearanceMedium"/>
        <View android:id="@+id/View01" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_marginLeft="3dp" android:layout_marginRight="3dp" android:background="@color/Black"/>
        <EditText android:id="@+id/EditText_cliente_trabalho_cidade" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_cidade"/>
        <EditText android:id="@+id/EditText_trabalho_bairro" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_bairro"/>
        <EditText android:id="@+id/EditText_cliente_trabalho_endereco" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginRight="6dp" android:layout_marginTop="12dp" android:ems="10" android:hint="@string/cliente_trabalho_endereco"/>
    </LinearLayout>
</ScrollView>

<强> FragmentClienteNovo.java 

package recode.mygv.view;

import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;

public class FragmentClienteNovo extends Fragment {

    public FragmentClienteNovo(){

    }

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

        View view = inflater.inflate(R.layout.fragment_cliente_novo, container,
                false);

        setHasOptionsMenu(true);

        return view;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);

        inflater.inflate(R.menu.fragment_cliente_novo, menu);

    }
}
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