如何从自定义列表视图中启动项目单击的不同活动？

Question

如何从自定义列表视图中启动项目单击的不同活动？

Ste*_*mau 3 android-intent android-activity

我跟随了无数的保镖,如http://www.javacodegeeks.com/2013/09/android-listview-with-adapter-example.html 也跟着这里提出的问题如何在点击列表项时使自定义ListView打开其他活动？但是在这里尝试了答案后(如何在单击列表项时使自定义ListView打开其他活动？)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){ 
      };
    });}
}

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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();
	}

}

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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">

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我的logcat:11-10 14:25:58.080:W/dalvikvm(13150):拒绝重启开机DEX'/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):Build Date:10/26/12 Fri 11-10 14:25:59.360:I/Adreno200-EGL(13150):Local Branch:11-10 14:25:59.360:I/Adreno200-EGL(13150):Remote Branch: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)

在某些地方我看不到有什么问题.我是Android开发的新手,你们的任何帮助都会非常感激.

Answer 1

eur*_*com 5

你的代码运行正常.我没有Customadapter就做到了.所有你需要的是下面.

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

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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();
}

}

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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>

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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>

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AndroidManifest.xml中

<?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>

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