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社区首页 >问答首页 >如何从自定义列表视图开始项目单击上的不同活动？

问如何从自定义列表视图开始项目单击上的不同活动？
EN

Stack Overflow用户
提问于 2014-11-10 11:36:36
回答 4查看 20.5K关注 0票数 3

我跟踪了许多教程，比如http://www.javacodegeeks.com/2013/09/android-listview-with-adapter-example.html，也跟踪了这里询问的问题，但在尝试了这里的答案(How to make custom ListView to open other activities when clicking list item?)之后，每当我从列表视图中选择一个项目时，我的应用程序就会停止运行。我的主要活动代码：

​

代码语言：javascript
复制
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){ 
      };
    });}
}

​

下面是其中一项活动(学校)的代码：

​

代码语言：javascript
复制
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();
	}

}

​

在我的舱单上我补充说：

​

代码语言：javascript
复制
</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">

​

我的日志:11-1014:25:58.080: W/dalvikvm(13150)：拒绝重新启动DEX‘/system/framework/hwfrawork.jar’11-10 14:25:59.360: I/Adreno200-EGL(13150)：EGL1.4QualcommBuild: AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.01.21.010_msm8625_JB_REL_2.0.3_Merge_release_AU (合并)11-1014:25:59。I/Adreno200-EGL(13150)：构建日期: 10/26/12 Fri 11-10 14:25:59.360: I/Adreno200-EGL(13150)：本地分部:11-1014:25:59.360: I/Adreno200-EGL(13150)：远程分支:quic/jb_rel_2.0.311-1014:25:59.360: I/Adreno200-EGL(13150)：本地补丁:NO11-10 14:25:59.360: 59.360: I/Adreno200-EGL(13150 ))：重构分支: AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.01.21.010 + NOTHING 11-10 14:26:00.450: I/编舞师(13150)：跳过90帧！应用程序可能在其主线程上做了太多的工作。11-10 14:26:03.230: W/dalvikvm(13150)：threadid=1:线程退出与未明异常(group=0x413fe438)

有些地方不对劲，我对android的开发并不熟悉，如果你们能提供帮助，我会非常感激的。

android-intent
android-activity
EN

回答 4

Stack Overflow用户

回答已采纳

发布于 2014-11-10 15:54:34

你的代码运行良好。我在没有定制适配器的情况下成功了。你所需要的就是下面。

MainActivity.java

代码语言：javascript
复制
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

代码语言：javascript
复制
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

代码语言：javascript
复制
<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

代码语言：javascript
复制
<?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>

AndroidManifest.xml

代码语言：javascript
复制
<?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>

​

票数 5
EN

Stack Overflow用户

发布于 2016-03-10 13:08:43

​

代码语言：javascript
复制
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){ 
      };
    });}
}

​

票数 1
EN

Stack Overflow用户

发布于 2016-07-01 10:44:57

通过这样做，您不必为活动编写所有的开关大小写。

代码语言：javascript
复制
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){ 
        };
     });
  }

}

别忘了说‘’。就在你包裹的名字后面。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/26842916

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