Android 在单击listview项目时启动新活动
我需要一些帮助来在listview项目中进行简单的单击以打开新活动。我在这里看到了很多类似的问题,但是没有人帮助我Android 在单击listview项目时启动新活动,android,listview,Android,Listview,我需要一些帮助来在listview项目中进行简单的单击以打开新活动。我在这里看到了很多类似的问题,但是没有人帮助我 public class CustomListView extends ListActivity { private EfficientAdapter adap; ... @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(saved
public class CustomListView extends ListActivity {
private EfficientAdapter adap;
...
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
adap = new EfficientAdapter(this);
setListAdapter(adap);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
startActivity(new Intent(CustomListView.this, next.class));
}
public static class EfficientAdapter extends BaseAdapter implements Filterable {
private LayoutInflater mInflater;
private Bitmap mIcon1;
private Context context;
public EfficientAdapter(Context context) {
// Cache the LayoutInflate to avoid asking for a new one each time.
mInflater = LayoutInflater.from(context);
this.context = context;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.adaptor_content, null);
convertView.setOnClickListener(new OnClickListener() {
private int pos = position;
@Override
public void onClick(View v) {
}
});
convertView.setTag(holder);
}else{
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
...
}
}
我还尝试在CustomListView类的onCreate方法中添加下一个代码,但也不起作用
ListView lv = getListView();
// listening to single list item on click
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
startActivity(new Intent(CustomListView.this, next.class));
}
});
ListView lv=getListView();
//在单击时侦听单个列表项
lv.setOnItemClickListener(新的OnItemClickListener(){
public void onItemClick(AdapterView父级、视图、,
内部位置,长id){
startActivity(新意图(CustomListView.this,next.class));
}
});
尝试将设置为startActivity(新的意图(1.this,2.class))编码>-编码到
convertView.setOnClickListener(new OnClickListener() {
private int pos = position;
@Override
public void onClick(View v) {...}
});
这是指什么?在你的代码中,它应该是一个上下文。这个指的是上下文
由于您的活动名称为CustomListView
,因此您应该编写CustomListView.this
,而不是one.this
您还可以使用getApplicationContext()
从CustomListView
类中删除onListItemClick()
,并将startActivity()
方法放在convertView.setOnClickListener()中
试试这个代码。我相信它会对您有所帮助,并且不会像这样将类设置为xml文件
setContentView(R.layout.second);
请确保您确实在类中放置了上述代码,否则在新活动中打开时会出现错误
package com.exampled.list;
import android.os.Bundle;
import android.app.ListActivity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
String [] names ={
"Iphone",
"Samsung",
"Nokia",
"Ericsson",
"BlackBerry",
"Benq"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,names));
}
public void onListItemClick(ListView Parent, View v, int position,long id){
startActivity(new Intent(MainActivity.this, Second.class));
//Toast.makeText(this, "Clicked on : " + names[position], Toast.LENGTH_LONG).show();
}
@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;
}
}
package com.exampled.list;
导入android.os.Bundle;
导入android.app.ListActivity;
导入android.content.Intent;
导入android.view.Menu;
导入android.view.view;
导入android.widget.ArrayAdapter;
导入android.widget.ListView;
导入android.widget.Toast;
公共类MainActivity扩展了ListActivity{
字符串[]名称={
“Iphone”,
“三星”,
“诺基亚”,
“爱立信”,
“黑莓”,
“明基”
};
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
setListAdapter(新的ArrayAdapter(这个,android.R.layout.simple_下拉列表_项目线,名称));
}
public void onListItemClick(ListView父视图、视图v、整数位置、长id){
startActivity(新意图(MainActivity.this,Second.class));
//Toast.makeText(点击:“+names[position],Toast.LENGTH\u LONG.show()”;
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.main,menu);
返回true;
}
}
“它不起作用”非常含糊。。。在第一个示例中,当您单击一个项目时会发生什么?您是否收到任何错误?如果需要,请发布。@DDjordjevic:What是one
中的one。这是传递给Intent
构造函数的?尝试CustomListView。此方法是我尝试过的一些尝试之一,但我遇到以下错误:此行有多个标记-无法从类型活动中静态引用非静态方法startActivity(Intent)-在范围中无法访问CustomListView类型的封闭实例。我还将one.class更改为我正在使用的正确类,很抱歉。请尝试startActivity(newintent(context,two.class))
,因为上下文被传递到适配器
-不起作用,我以前也尝试过,抛出错误:无法从ActivityTrycontext.startActivity类型对非静态方法startActivity(Intent)进行静态引用(new Intent(context,two.class))代码>现在方式。。错误:android.app.SuperNotCalledException:活动{com.xxx/com.xxx.SingleActivity}未调用super.onCreate()
package com.exampled.list;
import android.os.Bundle;
import android.app.ListActivity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
String [] names ={
"Iphone",
"Samsung",
"Nokia",
"Ericsson",
"BlackBerry",
"Benq"
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,names));
}
public void onListItemClick(ListView Parent, View v, int position,long id){
startActivity(new Intent(MainActivity.this, Second.class));
//Toast.makeText(this, "Clicked on : " + names[position], Toast.LENGTH_LONG).show();
}
@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;
}
}