我跟随了许多像http://www.javacodegeeks.com/2013/09/android-listview-with-adapter-example.html这样的保镖 还按照此处提出的问题How to make custom ListView to open other activities when clicking list item? 然而，在这里尝试了答案（How to make custom ListView to open other activities when clicking list item?）后，每当我从列表视图中选择一个项目时，我的应用程序就会一直停止。 我的主要活动代码：
public class MainActivity extends Activity {
ListView list;
String[] web = {
"Notifications",
"School",
"What's Hot",
"Tell a friend",
"Hit us up",
"Settings",
"About & Help"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CustomList adapter = new
CustomList(MainActivity.this, web, imageId);
list=(ListView)findViewById(R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position){
case 0: Intent newActivity = new Intent(MainActivity.this, Notifications.class);
startActivity(newActivity);
break;
case 1: Intent newActivity1 = new Intent(MainActivity.this, School.class);
startActivity(newActivity1);
break;
case 2: Intent newActivity2 = new Intent(MainActivity.this, Whats_hot.class);
startActivity(newActivity2);
break;
case 3: Intent newActivity3 = new Intent(MainActivity.this, Tellafriend.class);
startActivity(newActivity3);
break;
case 4: Intent newActivity4 = new Intent(MainActivity.this, Hitusup.class);
startActivity(newActivity4);
break;
case 5: Intent newActivity5 = new Intent(MainActivity.this, Settings.class);
startActivity(newActivity5);
break;
case 6: Intent newActivity6 = new Intent(MainActivity.this, AboutHelp.class);
startActivity(newActivity6);
break;
}
}
@SuppressWarnings("unused")
public void onClick(View v){
};
});}
}
以下是我尝试开始的其中一项活动（学校）的代码：
public class School extends Activity{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detail);
Intent newActivity1=new Intent();
setResult(RESULT_OK, newActivity1);
finish();
}
}
在我的清单上，我添加了这个：
</activity>
<activity android:name=".Notifications"></activity>
<activity android:name=".School"></activity>
<activity android:name=".Whats_hot"></activity>
<activity android:name=".Tellafriend"></activity>
<activity android:name=".Hitusup"></activity>
<activity android:name=".Settings"></activity>
<activity android:name=".AboutHelp">
我的logcat： 11-10 14：25：58.080：W / dalvikvm（13150）：拒绝重启开机DEX＆＃39; /system/framework/hwframework.jar' 11-10 14：25：59.360：I / Adreno200-EGL（13150）:: EGL 1.4 QUALCOMM build：AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.01.21.010_msm8625_JB_REL_2.0.3_Merge_release_AU（Merge） 11-10 14：25：59.360：I / Adreno200-EGL（13150）：建造日期：10/26/12周五 11-10 14：25：59.360：I / Adreno200-EGL（13150）：本地分行： 11-10 14：25：59.360：I / Adreno200-EGL（13150）：远程分支：quic / jb_rel_2.0.3 11-10 14：25：59.360：I / Adreno200-EGL（13150）：本地补丁：无 11-10 14：25：59.360：I / Adreno200-EGL（13150）：重建分支：AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.01.21.010 + NOTHING 11-10 14：26：00.450：I / Choreographer（13150）：跳过90帧！应用程序可能在其主线程上做了太多工作。 11-10 14：26：03.230：W / dalvikvm（13150）：threadid = 1：线程退出未捕获异常（组= 0x413fe438）
在某些地方出现了一些我无法看到的错误。我是Android开发的新手，非常感谢你们的任何帮助。
答案 0 :(得分：5)
您的代码运行正常。我没有Customadapter就做到了。您只需要下面的内容。
MainActivity.java
public class MainActivity extends Activity {
String[] web = {
"Notifications",
"School",
"What's Hot",
"Tell a friend",
"Hit us up",
"Settings",
"About & Help"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mainlist);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.activity_listview, web);
ListView list = (ListView) findViewById(R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position){
case 0: Intent newActivity = new Intent(MainActivity.this, School.class);
startActivity(newActivity);
break;
}
}
@SuppressWarnings("unused")
public void onClick(View v){
};
});
}//end oncreate
}//endactivity
School.java
public class School extends Activity{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.school);
Intent newActivity1=new Intent();
setResult(RESULT_OK, newActivity1);
//finish();
}
}
activity_mainlist.xml
<LinearLayout 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:orientation="vertical"
tools:context=".ListActivity" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
activity_listview.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Single List Item Design -->
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/label"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dip"
android:textSize="16dip"
android:textStyle="bold" >
</TextView>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.zzztest2"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name">
<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="com.example.zzztest2.School" android:label="@string/app_name"> </activity>
</application>
答案 1 :(得分：1)
public class MainActivity extends Activity {
ListView list;
String[] web = {
"Notifications",
"School",
"What's Hot",
"Tell a friend",
"Hit us up",
"Settings",
"About & Help"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CustomList adapter = new
CustomList(MainActivity.this, web, imageId);
list=(ListView)findViewById(R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position){
case 0: Intent newActivity = new Intent(MainActivity.this, Notifications.class);
startActivity(newActivity);
break;
case 1: Intent newActivity1 = new Intent(MainActivity.this, School.class);
startActivity(newActivity1);
break;
case 2: Intent newActivity2 = new Intent(MainActivity.this, Whats_hot.class);
startActivity(newActivity2);
break;
case 3: Intent newActivity3 = new Intent(MainActivity.this, Tellafriend.class);
startActivity(newActivity3);
break;
case 4: Intent newActivity4 = new Intent(MainActivity.this, Hitusup.class);
startActivity(newActivity4);
break;
case 5: Intent newActivity5 = new Intent(MainActivity.this, Settings.class);
startActivity(newActivity5);
break;
case 6: Intent newActivity6 = new Intent(MainActivity.this, AboutHelp.class);
startActivity(newActivity6);
break;
}
}
@SuppressWarnings("unused")
public void onClick(View v){
};
});}
}
答案 2 :(得分：1)
通过这种方式，您不必为活动编写所有开关案例。
public class MainActivity extends Activity {
ListView list;
String[] web = {
"Notifications",
"School",
"What's Hot",
"Tell a friend",
"Hit us up",
"Settings",
"About & Help"
};
String[] s1 = {
"Notifications",
"School",
"Whats_hot",
"Tellafriend",
"Hitusup",
"Settings",
"AboutHelp"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CustomList adapter = new
CustomList(MainActivity.this, web, imageId);
list=(ListView)findViewById(R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String a=s1[position];
Class a1= null;
try {
a1 = Class.forName("<Your Package name>."+a);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
startActivity(new Intent(MainActivity.this,a1));
}
@SuppressWarnings("unused")
public void onClick(View v){
};
});
}
}
不要忘记提出要点。＆＃39;紧跟包裹名称后。
答案 3 :(得分：0)
public class Menu extends ListActivity {
String classes[]={"startingPoint","TextPlay","TextPlayPerfectJavaCode","EXAMPLE2","example3","example4"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Menu.this, android.R.layout.simple_list_item_1,classes);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String className=classes[position];
Class ourClass=null;
try{
ourClass=Class.forName("travis.thenewboston.com.thenewboston."+className);
Intent ourIntent = new Intent(getApplicationContext(), ourClass);//replacing Menu.this - getApplicationContext()
startActivity(ourIntent);
}
catch (ClassNotFoundException e){
e.printStackTrace();
}
finally {
Toast.makeText(Menu.this, "Clicked at Position: "+Integer.toString(position), Toast.LENGTH_SHORT).show();
}
}
}