- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
问候大家,我正在尝试制作一个带有抽屉导航的应用程序,并且能够在其中一个抽屉中包含可选择的联系人,但它一直在崩溃。我构建的应用程序非常适合显示联系人。当我开始尝试单击联系人以导航到另一个具有联系人信息的 fragment 时,该应用程序将无法启动。非常感谢任何帮助,即使是指出我正确的方向。
Project File
主要 Activity Java fragment
import android.support.v4.app.FragmentTransaction;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.example.v1z0.assignments.Utils.*;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
Log.d(TAG, "onCreate: started");
initImageLoader();
init();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
private void initImageLoader()
{
UniversalImageLoader universalImageLoader = new UniversalImageLoader(MainActivity.this);
ImageLoader.getInstance().init(universalImageLoader.getConfig());
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_activity_faculty) {
getSupportFragmentManager().beginTransaction().replace(R.id.content_frame,
new ViewContactsFragment()).commit();
} else if (id == R.id.nav_second_layout) {
getFragmentManager().beginTransaction().replace(R.id.content_frame,
new SecondFragment()).commit();
} else if (id == R.id.nav_third_layout) {
getFragmentManager().beginTransaction().replace(R.id.content_frame,
new ThirdFragment()).commit();
} else if (id == R.id.nav_fourth_layout) {
getFragmentManager().beginTransaction().replace(R.id.content_frame,
new FourthFragment()).commit();
} else if (id == R.id.nav_fifth_layout) {
getFragmentManager().beginTransaction().replace(R.id.content_frame,
new FifthFragment()).commit();
} else if (id == R.id.nav_sixth_layout) {
getFragmentManager().beginTransaction().replace(R.id.content_frame,
new SixthFragment()).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void init()
{
{
ViewContactsFragment fragment = new ViewContactsFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
}
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
public class ContactFragment extends Fragment {
private static final String TAG = "ContactFragment";
public ContactFragment(){
super();
setArguments(new Bundle());
}
private Toolbar toolbar;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_contact, container, false);
toolbar = (Toolbar) view.findViewById(R.id.contactToolbar);
Log.d(TAG, "onCreateView: started");
//Toolbar Pre-req//
((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);
setHasOptionsMenu(true);
//Go Back//
ImageView ivBackArrow = (ImageView) view.findViewById(R.id.ivBackArrow);
ivBackArrow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick: clicked back arrow");
getActivity().getSupportFragmentManager().popBackStack();
}
});
//Go To Edit//
ImageView ivEdit = (ImageView) view.findViewById(R.id.ivEdit);
ivEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick: clicked edit");
EditContactFragment fragment = new EditContactFragment();
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(getString(R.string.edit_contact_fragment));
Log.d(TAG, "onClick: fragment" + getString(R.string.edit_contact_fragment));
transaction.commit();
}
});
return view;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.contact_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId())
{
case R.id.menuitem_delete:
Log.d(TAG, "onOptionsItemSelected: deleting contact");
}
return super.onOptionsItemSelected(item);
}
}
import android.content.Context;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentTransaction;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import java.util.ArrayList;
import com.example.v1z0.assignments.Models.Contact;
import com.example.v1z0.assignments.Utils.CustomListAdapter;
public class ViewContactsFragment extends Fragment {
private static final String TAG = "FirstFragment";
//images
private String testImageURL = "cis.ncu.edu.jm/images/faculty/man.jpg";
private String hgraham = "cis.ncu.edu.jm/images/faculty/hgraham.jpg";
private String dmitchell = "cis.ncu.edu.jm/images/faculty/dmitchell.png";
private String mnarayana = "cis.ncu.edu.jm/images/faculty/mnarayana.jpg";
private String hosborne = "cis.ncu.edu.jm/images/faculty/hosborne.jpg";
private String mreid = "cis.ncu.edu.jm/images/faculty/mreid.jpg";
private String esmall = "cis.ncu.edu.jm/images/faculty/esmall.jpg";
private String hsmith = "cis.ncu.edu.jm/images/faculty/hsmith.jpg";
private String ktooma = "cis.ncu.edu.jm/images/faculty/ktooma.jpg";
//widgets etc
private static final int STANDARD_APPBAR = 0;
private static final int SEARCH_APPBAR = 1;
private int mAppBarState;
private AppBarLayout viewContactsBar, searchBar;
private CustomListAdapter adapter;
private ListView contactsList;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_viewcontacts, container, false);
viewContactsBar = (AppBarLayout) view.findViewById(R.id.viewContactsToolbar);
searchBar = (AppBarLayout) view.findViewById(R.id.searchtoolbar);
contactsList = (ListView) view.findViewById(R.id.contactsList);
Log.d(TAG, "onCreate: started");
setAppBarState(STANDARD_APPBAR);
setupContactsList();
//add contact navigation//
FloatingActionButton fab = (FloatingActionButton) view.findViewById(R.id.fabAddContact);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick: clicked fab");
}
});
//search contact navigation//
ImageView ivSearchContact = (ImageView) view.findViewById(R.id.ivSearchIcon);
ivSearchContact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick: clicked search");
toggleToolBarState();
}
});
ImageView ivBackArrow = (ImageView) view.findViewById(R.id.ivBackArrow);
ivBackArrow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick: clicked back arrow");
toggleToolBarState();
}
});
return view;
}
private void setupContactsList()
{
final ArrayList<Contact> contacts = new ArrayList<>();
contacts.add(new Contact("Mr. Sheldon Glenn ", "(876) 963-7281", "work", "sheldon.glenn@ncu.edu.jm ", testImageURL));
contacts.add(new Contact("Mr. Hamlet Graham ", "(876) 963-7278", "work", "hamlet.graham@ncu.edu.jm ", hgraham));
contacts.add(new Contact("Mr. Oche Magbegor ", "(876) 963-7280", "work", "oche.magbegor@ncu.edu.jm ", testImageURL));
contacts.add(new Contact("Mr. Damion Mitchell ", "(876) 963-7285", "work", "damion.mitchell AT ncu.edu.jm ", dmitchell));
contacts.add(new Contact("Mr. Melvin Narayana ", "(876) 963-7279", "work", "melvin.narayana@ncu.edu.jm", mnarayana));
contacts.add(new Contact("Mr. Henry Osborne ", "(876) 963-7282", "work", "Henry.Osborne@ncu.edu.jm ", hosborne));
contacts.add(new Contact("Mr. Marlon Richards ", " (876) 963-7276", "work", "marlon.richards@ncu.edu.jm", testImageURL));
contacts.add(new Contact("Mrs. E. Beverley Small ", "(876) 963-7276", "work", "esmall@ncu.edu.jm ", esmall));
contacts.add(new Contact("Mr. Halzen Smith ", "(876) 963-7284", "work", "hsmith@ncu.edu.jm ", hsmith));
contacts.add(new Contact("Mr. Keron Tooma ", " (876) 963-7283", "work", "keron.tooma@ncu.edu.jm ", ktooma));
adapter = new CustomListAdapter(getActivity(), R.layout.layout_contactslistitem, contacts, "http://");
contactsList.setAdapter(adapter);
contactsList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
{
Log.d(TAG, "onClick: navigating to contact" + (R.string.contact_fragment));
ContactFragment fragment = new ContactFragment();
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(getString(R.string.edit_contact_fragment));
Log.d(TAG, "onClick: fragment" + getString(R.string.contact_fragment));
transaction.commit();
}
});
}
private void toggleToolBarState()
{
Log.d(TAG, "toggleToolBarState: toggling AppBatState");
if (mAppBarState == STANDARD_APPBAR)
{
setAppBarState(SEARCH_APPBAR);
}
else
{
setAppBarState(STANDARD_APPBAR);
}
}
@Override
public void onResume() {
super.onResume();
setAppBarState(STANDARD_APPBAR);
}
private void setAppBarState(int state)
{
Log.d(TAG, "setAppBarState: changing app bar state to" + state);
mAppBarState = state;
if (mAppBarState == STANDARD_APPBAR)
{
searchBar.setVisibility(View.GONE);
viewContactsBar.setVisibility(View.VISIBLE);
//keyboard hide//
View view = getView();
InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
try
{
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}catch (NullPointerException e)
{
Log.d(TAG, "setAppBarState: NullPointerException" + e.getMessage());
}
}
else if (mAppBarState == SEARCH_APPBAR)
{
viewContactsBar.setVisibility(View.GONE);
searchBar.setVisibility(View.VISIBLE);
//keyboard show//
InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}
}
}
--------- beginning of crash
2018-10-14 01:48:19.869 7041-7041/com.example.v1z0.assignments E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.v1z0.assignments, PID: 7041
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.v1z0.assignments/com.example.v1z0.assignments.MainActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f080055 (com.example.v1z0.assignments:id/fragment_container) for fragment ViewContactsFragment{dcf4537 #0 id=0x7f080055}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f080055 (com.example.v1z0.assignments:id/fragment_container) for fragment ViewContactsFragment{dcf4537 #0 id=0x7f080055}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1422)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1759)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1827)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2596)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2383)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2338)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2245)
at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3248)
at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3200)
at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:195)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:597)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1334)
at android.app.Activity.performStart(Activity.java:7029)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2741)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relLayout1">
<include layout="@layout/snippet_contacttoolbar"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/relLayout1"
android:id="@+id/relLayout2">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
app:civ_border_color="@color/black"
app:civ_border_width="1dp"
android:id="@+id/contactImage" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/contactImage"
android:layout_marginTop="30dp"
android:textSize="30sp"
android:textColor="@color/black"
android:layout_marginStart="30dp"
android:id="@+id/tvName" />
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/tvName"
android:id="@+id/lvContactProperties">
</ListView>
</RelativeLayout>
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@drawable/first">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/relLayout1">
<include layout="@layout/snippet_searchtoolbar"/>
<include layout="@layout/snippet_viewcontactstoolbar"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/relLayout1">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/contactsList"></ListView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textSize="25sp"
android:id="@+id/textNoContacts"
android:textColor="@color/black"
/>
</RelativeLayout>
</RelativeLayout>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginEnd="20dp"
android:layout_marginBottom="20dp"
android:elevation="10dp"
app:fabSize="normal"
app:rippleColor="@color/colorAccent"
android:src="@drawable/ic_person_add"
android:id="@+id/fabAddContact"/>
</android.support.design.widget.CoordinatorLayout>
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.constraint.ConstraintLayout>
最佳答案
在您的 init()
MainActivity 类文件的方法,您引用了不正确的资源 id。
private void init()
{
{
ViewContactsFragment fragment = new ViewContactsFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.content_frame, fragment);//not R.id.fragment_container
transaction.addToBackStack(null);
transaction.commit();
}
}
关于java - 无法启动 Activity ComponentInfo | E/Android运行时 : FATAL EXCEPTION,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52800320/
我正在尝试为 Android 设置 JUnit 测试并且我有 list 等设置但我不断收到此错误: java.lang.RuntimeException: Unable to instantiate
我的问题是当我运行应用程序并单击注册按钮时突然显示弹出窗口:“强制关闭” 这是我的代码: Main.java package com.example.server; import java.util.
当我运行我的 Activity registeration.java 或 login.java 时,它将 Intent 中的用户名传递给名为 profile.java 的新 Activity > 关于
这个问题已经有答案了: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo (47 个回答) 已关闭 8
以下 Android Studio 1.5 MainActivity.java 代码会在标题中生成错误,并带有 You need to use a Theme.AppCompat theme publ
尝试从文本消息 URL 在 Android 上启动 Xamarin 表单应用程序时,我收到此错误。我一直在遵循 THIS 中提到的步骤文章。 这里是我 AppManifest.xml 中的应用程序节点
我在我的应用程序中创建了一个 map View ,但出现了这个错误: 09-07 21:24:08.886: INFO/ActivityManager(243): Starting: Intent {
我的应用程序运行正常,但当应用程序进入后台时,它在应该恢复时崩溃了。正如您在源代码中看到的那样,我记录了 onStart、onStop 等事件。 在我的日志中,当我启动应用程序时,我可以看到 onSt
我正在处理从其他人那里导入的 Android 项目。我已经对所有依赖项进行排序,项目中没有错误,但是当我尝试启动它时,我得到: 04-08 16:49:41.761: E/AndroidRuntime
在我的应用程序中,当我选择按钮时,它会将我指向 mapView 类,它会显示用户的当前位置。 但是,它抛出 java.lang.RuntimeException: Unable to instanti
我在开发 Android 应用程序时遇到问题。我首先对我的错误进行了研究,然后发现还有其他人和我有同样的问题。我阅读了所有评论并尝试了所有方法,但我仍然遇到同样的错误。 这里是我的错误 05-29 1
我有一个 Google 云消息的接收器,它已在 AndroidManifest.xml 中注册:
我正在开发一个应用程序,最低版本为 Froyo,目标版本为 Gingerbread。因此, list 显示: 我有一个模拟器和一个带有 Gingerbread 的 Nexus One,应用程序部署和
我正在尝试将其作为我的主要 Activity 以打开另一个 Activity (ListAtivity)。但是,当我单击按钮时,应用程序崩溃并出现以下异常: 01-26 17:12:58.341: E
我正在制作一个可以搜索表“员工”并返回结果的应用程序。我正在使用 searchdialog 进行搜索。但是我在搜索对话框上按下搜索按钮时得到了 FC。请帮帮我。 代码: public class Si
我是 Android 开发的新手,所以我确信这会变成我错过的愚蠢的事情,但我有两个 Activity :StartScreen 和 Map。 StartScreen 只是简单的文本和一个按钮,然后应该
我修改了来自 http://www.elektor.com/magazines/2012/march/android-switch-interface.2084156.lynkx 的示例蓝牙通信应用程
我创建了一个应用程序,该应用程序应该从我的Thingspeak channel 接收数据。 首先,我只是使用了webview小部件,但我想走得更远,并使用Thingspeak Java api自己处理
可以找到 list 文件here . 可以找到DeviceAdminReceiver类here agent_device_xml 定义如下:
01-05 18:35:42.754: E/AndroidRuntime(5814): java.lang.RuntimeException: 无法实例化 Activity ComponentInfo
我是一名优秀的程序员,十分优秀!