扩展抽屉式导航活动,其他活动 [英] extending navigation drawer activity to other activities
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问题描述
我想创建一个导航抽屉里的活动,所以我可以延长该活动,并使用在所有活动中的菜单,按照这一问题<一给出了答案href="http://stackoverflow.com/questions/19451715/same-navigation-drawer-on-different-activities">Link但我的测试应用程序总是崩溃,这是我的code:
BaseActivity.java
公共类BaseActivity延伸活动{
公共DrawerLayout drawerLayout;
公众的ListView drawerList;
公众的String []层;
私人ActionBarDrawerToggle drawerToggle;
保护无效的onCreate(包savedInstanceState){
// R.id.drawer_layout应在每一次活动完全一样
// ID。
drawerLayout =(DrawerLayout)findViewById(R.id.drawer_layout);
drawerToggle =新ActionBarDrawerToggle((活动)这一点,drawerLayout,
R.drawable.ic_drawer,0,0){
公共无效onDrawerClosed(查看视图){
。getActionBar()的setTitle(R.string.hello_world);
}
公共无效onDrawerOpened(查看drawerView){
。getActionBar()的setTitle(R.string.hello_world);
}
};
drawerLayout.setDrawerListener(drawerToggle);
getActionBar()setDisplayHomeAsUpEnabled(真)。
getActionBar()setHomeButtonEnabled(真)。
。层= getResources()getStringArray(R.array.planets_array);
drawerList =(ListView控件)findViewById(R.id.left_drawer);
drawerList.setAdapter(新ArrayAdapter&LT;字符串&GT;(这一点,
R.layout.drawer_list_item,android.R.id.text1,层));
}
@覆盖
公共布尔onOptionsItemSelected(菜单项项){
如果(drawerToggle.onOptionsItemSelected(项目)){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
@覆盖
保护无效onPostCreate(包savedInstanceState){
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
@覆盖
公共无效onConfigurationChanged(配置NEWCONFIG){
super.onConfigurationChanged(NEWCONFIG);
drawerToggle.onConfigurationChanged(NEWCONFIG);
}
}
MainActivity.java
公共类MainActivity扩展BaseActivity {
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_profile);
}
}
activity_profile.xml
&LT; RelativeLayout的的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:paddingBottom会=@扪/ activity_vertical_margin
机器人:以下属性来=@扪/ activity_horizontal_margin
机器人:paddingRight =@扪/ activity_horizontal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
工具:上下文=ProfileActivity。&GT;
&LT;的TextView
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:文本=@字符串/参考hello world/&GT;
&LT; / RelativeLayout的&GT;
logcat的
1月3日至3号:22:18.031:D / AndroidRuntime(27902):关闭虚拟机
一月3日至3号:22:18.031:W / dalvikvm(27902):主题ID = 1:螺纹退出与未捕获的异常(组= 0x2b542210)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):致命异常:主要
一月3日至3号:22:18.041:E / AndroidRuntime(27902):java.lang.RuntimeException的:无法启动的活动ComponentInfo {com.example.slider / com.example.slider.MainActivity}:显示java.lang.NullPointerException
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread.access $ 600(ActivityThread.java:127)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1158)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.os.Handler.dispatchMessage(Handler.java:99)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.os.Looper.loop(Looper.java:137)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread.main(ActivityThread.java:4441)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在java.lang.reflect.Method.invokeNative(本机方法)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在java.lang.reflect.Method.invoke(Method.java:511)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在dalvik.system.NativeStart.main(本机方法)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):由:显示java.lang.NullPointerException
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在com.example.slider.BaseActivity.onCreate(BaseActivity.java:35)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在com.example.slider.MainActivity.onCreate(MainActivity.java:12)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.Activity.performCreate(Activity.java:4465)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
一月3日至3号:22:18.041:E / AndroidRuntime(27902):11 ...更多
解决方案
在你要调用super.onCreate(savedInstanceState)的setContentView()后的主要活动
I'm trying to create a navigation drawer activity so I can extend that activity and use the menu in all activities by following the answer given in this question Link but my test app keeps crashing, here's my code:
BaseActivity.java
public class BaseActivity extends Activity {
public DrawerLayout drawerLayout;
public ListView drawerList;
public String[] layers;
private ActionBarDrawerToggle drawerToggle;
protected void onCreate(Bundle savedInstanceState) {
// R.id.drawer_layout should be in every activity with exactly the same
// id.
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
drawerToggle = new ActionBarDrawerToggle((Activity) this, drawerLayout,
R.drawable.ic_drawer, 0, 0) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(R.string.hello_world);
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(R.string.hello_world);
}
};
drawerLayout.setDrawerListener(drawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
layers = getResources().getStringArray(R.array.planets_array);
drawerList = (ListView) findViewById(R.id.left_drawer);
drawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, android.R.id.text1, layers));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
drawerToggle.onConfigurationChanged(newConfig);
}
}
MainActivity.java
public class MainActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
}
}
activity_profile.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".ProfileActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
Logcat
03-03 01:22:18.031: D/AndroidRuntime(27902): Shutting down VM
03-03 01:22:18.031: W/dalvikvm(27902): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
03-03 01:22:18.041: E/AndroidRuntime(27902): FATAL EXCEPTION: main
03-03 01:22:18.041: E/AndroidRuntime(27902): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.slider/com.example.slider.MainActivity}: java.lang.NullPointerException
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread.access$600(ActivityThread.java:127)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.os.Handler.dispatchMessage(Handler.java:99)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.os.Looper.loop(Looper.java:137)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread.main(ActivityThread.java:4441)
03-03 01:22:18.041: E/AndroidRuntime(27902): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:22:18.041: E/AndroidRuntime(27902): at java.lang.reflect.Method.invoke(Method.java:511)
03-03 01:22:18.041: E/AndroidRuntime(27902): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-03 01:22:18.041: E/AndroidRuntime(27902): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-03 01:22:18.041: E/AndroidRuntime(27902): at dalvik.system.NativeStart.main(Native Method)
03-03 01:22:18.041: E/AndroidRuntime(27902): Caused by: java.lang.NullPointerException
03-03 01:22:18.041: E/AndroidRuntime(27902): at com.example.slider.BaseActivity.onCreate(BaseActivity.java:35)
03-03 01:22:18.041: E/AndroidRuntime(27902): at com.example.slider.MainActivity.onCreate(MainActivity.java:12)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.Activity.performCreate(Activity.java:4465)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-03 01:22:18.041: E/AndroidRuntime(27902): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
03-03 01:22:18.041: E/AndroidRuntime(27902): ... 11 more
解决方案
In the main activity you have to call super.onCreate(savedInstanceState) after setContentView()
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