我正在尝试制作导航抽屉，但每次执行时，应用程序都会崩溃。我是初学者。如果您需要更多信息，请告诉我们，谢谢
MainActivity.java
package com.pixalstudio.navigationdrawer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
public class MainActivity extends Activity implements OnItemClickListener {
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String[] mTitles;
DrawerLayout mDrawerLayout;
ListView mDrawerList;
mTitles = getResources().getStringArray(R.array.drawerItems);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.drawer_listview);
mDrawerList.setAdapter((ListAdapter) new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mTitles));
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerLayout.closeDrawers();
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
@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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void selectItem(int position) {
switch (position) {
case 0:
Intent i = new Intent(MainActivity.this, LocationSelection.class);
startActivity(i);
break;
default:
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
switch (position) {
case 0:
Intent i = new Intent(MainActivity.this, LocationSelection.class);
startActivity(i);
break;
default:
}
}
}
activity_main.xml中
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.pixalstudio.navigationdrawer.MainActivity" >
<RelativeLayout
android:id="@+id/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#757575" >
</RelativeLayout>
<ListView
android:id="@+id/drawer_listview"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#FF9800"
android:choiceMode="singleChoice" >
</ListView>
</android.support.v4.widget.DrawerLayout>
logcat的
07-07 16:53:20.301: D/OpenGLRenderer(1775): Use EGL_SWAP_BEHAVIOR_PRESERVED: true
07-07 16:53:20.305: D/(1775): HostConnection::get() New Host Connection established 0xb42d7750, tid 1775
07-07 16:53:20.322: D/Atlas(1775): Validating map...
07-07 16:53:20.398: D/libEGL(1775): loaded /system/lib/egl/libEGL_emulation.so
07-07 16:53:20.399: D/libEGL(1775): loaded /system/lib/egl/libGLESv1_CM_emulation.so
07-07 16:53:20.414: D/libEGL(1775): loaded /system/lib/egl/libGLESv2_emulation.so
07-07 16:53:20.427: D/(1775): HostConnection::get() New Host Connection established 0xaf039480, tid 1793
07-07 16:53:20.638: I/OpenGLRenderer(1775): Initialized EGL, version 1.4
07-07 16:53:20.728: D/OpenGLRenderer(1775): Enabling debug mode 0
07-07 16:53:20.900: W/EGL_emulation(1775): eglSurfaceAttrib not implemented
07-07 16:53:20.900: W/OpenGLRenderer(1775): Failed to set EGL_SWAP_BEHAVIOR on surface 0xaf035860, error=EGL_SUCCESS
07-07 16:53:20.940: D/AndroidRuntime(1775): Shutting down VM
07-07 16:53:20.940: D/AndroidRuntime(1775): --------- beginning of crash
07-07 16:53:20.941: E/AndroidRuntime(1775): FATAL EXCEPTION: main
07-07 16:53:20.941: E/AndroidRuntime(1775): Process: com.pixalstudio.navigationdrawer, PID: 1775
07-07 16:53:20.941: E/AndroidRuntime(1775): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.pixalstudio.navigationdrawer/com.pixalstudio.navigationdrawer.LocationSelection}: java.lang.ClassCastException: com.pixalstudio.navigationdrawer.LocationSelection cannot be cast to android.app.Activity
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2236)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread.access$800(ActivityThread.java:151)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.os.Handler.dispatchMessage(Handler.java:102)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.os.Looper.loop(Looper.java:135)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread.main(ActivityThread.java:5254)
07-07 16:53:20.941: E/AndroidRuntime(1775): at java.lang.reflect.Method.invoke(Native Method)
07-07 16:53:20.941: E/AndroidRuntime(1775): at java.lang.reflect.Method.invoke(Method.java:372)
07-07 16:53:20.941: E/AndroidRuntime(1775): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
07-07 16:53:20.941: E/AndroidRuntime(1775): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
07-07 16:53:20.941: E/AndroidRuntime(1775): Caused by: java.lang.ClassCastException: com.pixalstudio.navigationdrawer.LocationSelection cannot be cast to android.app.Activity
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.Instrumentation.newActivity(Instrumentation.java:1066)
07-07 16:53:20.941: E/AndroidRuntime(1775): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2226)
07-07 16:53:20.941: E/AndroidRuntime(1775): ... 10 more
07-07 16:53:23.310: I/Process(1775): Sending signal. PID: 1775 SIG: 9
Menifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pixalstudio.navigationdrawer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".LocationSelection"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.LOCATIONSELECTION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>