我尝试在所有活动中出现两个滑动抽屉。因此，我构建了一个BaseActivity，它扩展了我的子类MainActivity。我使用this代码来组合布局。这很有效，两个布局都出现在我的孩子活动上。我为我的抽屉和一些onItemClick Listenere等实现了一个列表视图。但是这些都没有在我的子类中执行。我有一个空抽屉。扼杀每一个toast我放入任何BaseActivity的方法出现在屏幕上。
activity_base.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/act_content"
android:layout_width="match_parent"
android:layout_height="200dp" >
</FrameLayout>
<android.support.v4.widget.DrawerLayout
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="de.trialar.mtb_werkstatt.BaseActivity" >
<ListView
android:id="@+id/drawerList"
android:layout_width="200dp"
android:layout_height="match_parent"
android:layout_gravity="left"
android:background="#FF8800"
android:divider="@null" >
</ListView>
</android.support.v4.widget.DrawerLayout>
</FrameLayout>
BaseActivity.java
public class BaseActivity extends ActionBarActivity implements
OnItemClickListener {
private DrawerLayout drawerLayout;
private ListView listView;
private ActionBarDrawerToggle drawerListener;
private MyAdapter myAdapter;
protected FrameLayout fullLayout;
protected FrameLayout actContent;
@Override
public void setContentView(final int layoutResID) {
fullLayout = (FrameLayout) getLayoutInflater().inflate(
R.layout.activity_base, null); // Your base layout here
actContent = (FrameLayout) fullLayout.findViewById(R.id.act_content);
getLayoutInflater().inflate(layoutResID, actContent, true);
super.setContentView(fullLayout);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_base);
listView = (ListView) findViewById(R.id.drawerList);
myAdapter = new MyAdapter(this);
listView.setAdapter(myAdapter);
listView.setOnItemClickListener(this);
drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
drawerListener = new ActionBarDrawerToggle(this, drawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
@Override
public void onDrawerClosed(View drawerView) {
// TODO Auto-generated method stub
}
@Override
public void onDrawerOpened(View drawerView) {
// TODO Auto-generated method stub
}
};
drawerLayout.setDrawerListener(drawerListener);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onPostCreate(savedInstanceState);
drawerListener.syncState();
}
@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) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
if (drawerListener.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// TODO Auto-generated method stub
super.onConfigurationChanged(newConfig);
drawerListener.onConfigurationChanged(newConfig);
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
selectItem(arg2);
Toast.makeText(BaseActivity.this,
myAdapter.getItem(arg2) + " angeklickt: " + arg2,
Toast.LENGTH_LONG).show();
switch (arg2) {
case 0:
startActivity(new Intent(this, MainActivity.class));
break;
case 1:
startActivity(new Intent(this, Teileliste.class));
break;
case 2:
startActivity(new Intent(this, Reinigung.class));
break;
default:
}
}
public void selectItem(int position) {
// TODO Auto-generated method stub
listView.setItemChecked(position, true);
}
public void setTitle(String title) {
// TODO Auto-generated method stub
getSupportActionBar().setTitle(title);
}
class MyAdapter extends BaseAdapter {
private Context context;
String[] mainCatSites;
int[] images = { R.drawable.ic_werkstatt, R.drawable.ic_teileliste,
R.drawable.ic_reinigung };
public MyAdapter(Context context) {
this.context = context;
mainCatSites = context.getResources().getStringArray(
R.array.mainCat);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mainCatSites.length;
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return mainCatSites[arg0];
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
View row = null;
if (arg1 == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.custom_row, arg2, false);
} else {
row = arg1;
}
TextView titleTextView = (TextView) row
.findViewById(R.id.tvRowList);
ImageView titleImageView = (ImageView) row
.findViewById(R.id.imageView1);
titleTextView.setText(mainCatSites[arg0]);
titleImageView.setImageResource(images[arg0]);
return row;
}
}
}
MainActivity.java
public class MainActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
答案 0 :(得分：1)
您仍在调用super.setContentView（）和THEN setContentView（）。这意味着您要对R.layout.activity_base进行膨胀并检索其布局，然后使用activity_main替换整个布局。现在setContentView（）再次膨胀R.layout.activity_base，这次没有初始化来自activity_base的视图。基本上，变量＆＃34; listView＆＃34;等等，参考你所替换的布局的视图。
要解决此问题，您需要将BaseActivity中的onCreate（）替换为类似
的内容protected final void initViews() { ... }
并删除里面的super.onCreate（）和super.setContentView（）。最后，只需添加initViews（）;低于setContentView（R.layout.activity_main）;
这将确保您的变量中保存正确的视图。