Saturday, February 8, 2014

Each entry in the ListView how to jump to another Activity?


            
listview layout has 16 entries (Item), how each item can jump to another Activity, I do, but there is no response, please give pointers about: the code is that these GroupActivity.java 
 package com.test.listview; 

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 

import android.app.Activity; 
import android.content.Intent; 
import android.content.SharedPreferences; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ListView; 

public class GroupActivity extends Activity {
private ListView listView; 
private ListViewAdapter listViewAdapter; 
private List > listItems; 
protected SharedPreferences group_sp; 

@ Override 
public void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); 
setContentView (R.layout.group); 

listView = (ListView) findViewById (R.id.group1_list); 
listItems = getlistItems (); 
listViewAdapter = new ListViewAdapter (this, listItems); 
listView.setAdapter (listViewAdapter); 
listView.setTextFilterEnabled (true); 

listView.setOnItemClickListener (new OnItemClickListener () {
@ Override 
public void onItemClick (AdapterView  parent, View view, int position, long id) {
Log.i ("mm", "onItemClick"); 
Intent intent = new Intent (); 
switch (position) {
case 0: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 1: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 2: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 3: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 4: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 5: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 6: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 7: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 8: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 9: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 10: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 11: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 12: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 13: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 14: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
case 15: 
intent.setClass (getApplicationContext (), ListViewGroup.class); 
GroupActivity.this.startActivity (intent); 
break; 
} 

} 

}); 
} 

private List > getlistItems () {
List > listItems = new ArrayList > (); 
for (int i = 1; i <= 16; i + +) {
Map  map = new HashMap  (); 
map.put ("imageButton", R.drawable.goff1); 
map.put ("textView", "Group" + i); 
map.put ("imageView", R.drawable.arrow1); 
listItems.add (map); 
} 
return listItems; 
} 
}


Adapter 
 package com.test.listview; 

import java.util.List; 
import java.util.Map; 

import android.content.Context; 
import android.content.Intent; 
import android.content.SharedPreferences; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.ImageButton; 
import android.widget.ImageView; 
import android.widget.TextView; 

public class ListViewAdapter extends BaseAdapter {
private Context context; / / run the context 
private List > listItems; / / group list 
private LayoutInflater layoutInflater; / / View container 
protected SharedPreferences group_sp; 

/ ** Custom list control collection * / 
public final class ListItemView {
public ImageButton imageButton; 
public TextView textView; 
public ImageView imageView; 
} 

public ListViewAdapter (Context context, List > listItems) {
this.context = context; 
layoutInflater = LayoutInflater.from (context) ;/ / create a view of the container to set the context 
this.listItems = listItems; 
} 

public int getCount () {
return listItems.size (); 
} 

public Object getItem (int position) {
return listItems.get (position); 
} 

public long getItemId (int position) {
return position; 
} 

/ ** List list settings * / 
public View getView (int position, View convertView, ViewGroup parent) {
/ / TODO Auto-generated method stub 
convertView = layoutInflater.inflate (R.layout.group_list, null); 
/ / Get the spatial object 
final ImageButton imageButton = (ImageButton) convertView.findViewById (R.id.goff1); 
imageButton.setBackgroundResource (R.drawable.goff1); 
imageButton.setOnClickListener (new View.OnClickListener () {
boolean flag = true; 
public void onClick (View v) {
if (flag) {
imageButton.setBackgroundResource (R.drawable.gon1); 
flag = false; 
} Else {
imageButton.setBackgroundResource (R.drawable.goff1); 
flag = true; 
} 

} 


}); 
TextView textView = (TextView) convertView.findViewById (R.id.title); 
ImageView imageView = (ImageView) convertView.findViewById (R.id.right_image); 
/ / ImageView.setOnClickListener (new View.OnClickListener () {
/ / 
/ / @ Override 
/ / Public void onClick (View v) {
/ / Intent intent = new Intent (); 
/ / Intent.setClass (context, ListViewGroup.class); 
/ / Context.startActivity (intent); 
/ /} 
/ /}); 

/ / Fill the text and pictures 
imageButton.setBackgroundResource ((Integer) listItems.get (position) get ("imageButton").); 
textView.setText ((String) listItems.get (position) get ("textView").); 
imageView.setBackgroundResource ((Integer) listItems.get (position) get ("imageView").); 

/ / AddListener (convertView); 
return convertView; 
} 

}

Reply:
adb logcat E> e.log
Reply:
LZ not use startActivity (intent) do?
Reply:
Breakpoints
Reply:
If you want to start in onItemClick Activity, does not require using switch case in each row click to jump to a new Activity, use the following code to replace your: 

 listView.setOnItemClickListener (new OnItemClickListener () {
@ Override 
public void onItemClick (AdapterView  parent, View view, int position, long id) {
Log.i ("mm", "onItemClick"); 
Intent intent = new Intent (GroupActivity.this, ListViewGroup.class); GroupActivity.this.startActivity (intent);} 
});

Reply:
Do not use the application context, try using Activity context: 

 intent.setClass (GroupActivity.this, ListViewGroup.class);

Reply:
The reply was deleted administrator at 2012-12-14 16:14:55

Reply:
references, 4th Floor CSDN_Ask reply:
onItemClick If you want to start Activity, does not require using switch case in each row click to jump to a new Activity, with the following code instead of your:



Java code
?



123456

listView.setOnItemClickListener (new OnItemClickListener () {@ Override publi ......


Ah, has been solved
Reply:
The landlord how to solve, I also teach experience points to it, thank you
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