希望你们能帮忙。
我有一个活动，处理所有10个图像按钮点击和列表视图意图。我要做的是为所有列表视图按钮点击提供1个布局。并在此布局中调用不同的数据。当我开始这个项目时，我有很多活动，直到一个伟大的堆栈溢出用户指出我可以使它更简单，我做了，并使它很清楚。
package com.example.testtest;
import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class Listviewact extends Activity {
public void onCreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.listview_layout);
Typeface tf = Typeface.createFromAsset(getAssets(),"fonts/AlexBrush-Regular-OTF.otf");
TextView tv = (TextView) findViewById(R.id.textView1);
tv.setTypeface(tf);
}
public void onResume() {
super.onResume();
int buttonId = getIntent().getIntExtra("buttonId", 0);
int buttonIdx = getButtonIdx(buttonId);
// find and set image according to buttonId
int imageId = IMAGE_IDS[buttonIdx]; // image to show for given button
ImageView imageView = (ImageView)findViewById(R.id.imageView1);
imageView.setImageResource(imageId);
// find and set listview imtes according to buttonId
String[] items = LISTVIEW_DATA[buttonIdx]; // listview items to show for given button
ListView listView = (ListView)findViewById(R.id.listView1);
ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, items);
listView.setAdapter(adapter);
}
private void setListAdapter(ArrayAdapter adapter) {
// TODO Auto-generated method stub
}
// a little helper to map ids to array indices
// to be able to fetch the correct image and listview data later
private final static int[] BUTTON_IDS = new int[] {
R.id.imageButton1,
R.id.imageButton2,
R.id.imageButton3,
R.id.imageButton4,
R.id.imageButton5,
R.id.imageButton6
};
// 6 images
private final static int[] IMAGE_IDS = new int[] {
R.drawable.bmw,
R.drawable.ford,
R.drawable.honda,
R.drawable.toy,
R.drawable.vok2,
R.drawable.ic_launcher
};
// 6 different sets of strings for the listviews
private final static String[][] LISTVIEW_DATA = new String[][] {
{"First A", "First B", "First C", "First D","First E","First F"},
{"Second A", "Second B", "Second C"},
{"Third A", "Third B", "Third C"},
{"Forth A", "Forth B", "Forth C"},
{"Fifth A", "Fifth B", "Fifth C"},
{"Sixth A", "Sixth B", "Sixth C"},
};
// map button id to array index
static private int getButtonIdx(int id) {
for(int i = 0; i<BUTTON_IDS.length; i++) {
if (BUTTON_IDS[i] == id) return i;
}
return 0; // should not happen
}
}
如果有人可以告诉我如何创建一个类，我可以从我的代码中调用所有列表视图中的所有项目点击，这将是很棒的。
package com.example.testtest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
public class MainActivity extends Activity implements OnClickListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_of_button);
ImageButton btn1 = (ImageButton)findViewById(R.id.imageButton1);
ImageButton btn2 = (ImageButton)findViewById(R.id.imageButton2);
ImageButton btn3 = (ImageButton)findViewById(R.id.imageButton3);
ImageButton btn4 = (ImageButton)findViewById(R.id.imageButton4);
ImageButton btn5 = (ImageButton)findViewById(R.id.imageButton5);
ImageButton btn6 = (ImageButton)findViewById(R.id.imageButton6);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
btn5.setOnClickListener(this);
btn6.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId()) {
// if one of the image buttons is pressed...
case R.id.imageButton1:
case R.id.imageButton2:
case R.id.imageButton3:
case R.id.imageButton4:
case R.id.imageButton5:
case R.id.imageButton6:
Intent intent = new Intent(this, Listviewact.class);
// pass ID of pressed button to listview-activity
intent.putExtra("buttonId", v.getId());
startActivity(intent);
break;
// here you could place handling of other clicks if necessary...
}
}
private void setListAdapter(ArrayAdapter<String> arrayAdapter) {
// TODO Auto-generated method stub
}
private ListView getListView() {
// TODO Auto-generated method stub
return null;
}
}
欢呼声。
答案 0 :(得分：0)
您使用的是ListView但未使用任何回调功能？在这里，这是我用于ListView的代码。我把活动放在我的阵列中，但你可以放任何东西。修改R.layout.mfd_view允许您为每个列表项添加任何内容。一个Button，如果这是你需要的。希望这可以帮助。我还在学习自己。
import android.app.Activity;
import android.app.ListFragment;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
public class MyListFragment extends ListFragment {
String fragmentBackStack;
MyMapHandler handler;
OnViewSelectedListener mListener;
/**
* An array of POJOs used to hold the info about the fragments we'll be
* swapping between This should be inserted into an array adapter of some
* sort before being passed onto ListAdapter
*/
private static final ViewDetails[] ACTIVITY_DETAILS = {
new ViewDetails(R.string.action_largeTach,
R.string.largeTach_description, LargeTachActivity.class),
new ViewDetails(R.string.action_map, R.string.map_description,
MyMapHandler.class),
new ViewDetails(R.string.action_navigation,
R.string.navigation_description, NavigationActivity.class),
new ViewDetails(R.string.action_raceMode,
R.string.raceMode_description, RaceModeActivity.class),
new ViewDetails(R.string.action_settings,
R.string.settings_description, SettingsFragment.class),
new ViewDetails(R.string.action_extraInfo,
R.string.extraInfo_description, ExtraInfoActivity.class) };
/**
* @author PyleC1
*
* A POJO that holds a class object and it's resource info
*/
public static class ViewDetails {
private final Class<? extends Activity> viewActivity;
private int titleId;
private int descriptionId;
/**
* @param titleId
* The resource ID of the string for the title
* @param descriptionId
* The resource ID of the string for the description
* @param activityClass
* The fragment's class associated with this list position
*/
ViewDetails(int titleId, int descriptionId,
Class<? extends Activity> viewActivity) {
super();
this.titleId = titleId;
this.descriptionId = descriptionId;
this.viewActivity = viewActivity;
}
public Class<? extends Activity> getViewActivity() {
return viewActivity;
}
}
/**
* @author PyleC1
*
* Extends the ArrayAdapter class to support our custom array that
* we'll insert into the ListAdapter so the user can pick between
* MFD screens at boot time.
*/
private static class CustomArrayAdapter extends ArrayAdapter<ViewDetails> {
public CustomArrayAdapter(Context context, ViewDetails[] activities) {
super(context, R.layout.mfd_view, R.id.mfdTitle, activities);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
MFDView mfdView;
if (convertView instanceof MFDView) {
mfdView = (MFDView) convertView;
} else {
mfdView = new MFDView(getContext());
}
ViewDetails details = getItem(position);
mfdView.setTitleId(details.titleId);
mfdView.setDescriptionId(details.descriptionId);
return mfdView;
}
}
public void onAttach(Activity activity) {
super.onAttach(activity);
ListAdapter listAdapter = new CustomArrayAdapter(getActivity(),
ACTIVITY_DETAILS);
setListAdapter(listAdapter);
try {
mListener = (OnViewSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnViewSelectedListener!");
}
}
@Override
public void onResume() {
super.onResume();
}
public interface OnViewSelectedListener {
public void onViewSelected(Class<? extends Activity> activityClass);
}
public void onListItemClick(ListView l, View v, int position, long id) {
ViewDetails details = (ViewDetails) getListAdapter().getItem(position);
mListener.onViewSelected(details.viewActivity);
}
}
请注意，无论何种活动调用此片段都必须实现OnViewSelectedListener接口。如果您将此作为子类添加到主活动中，则不需要这样做。 public void onListItemClick(arg0, arg1, arg2, arg3)回调很好。你只需从里面交换片段或调用活动。
答案 1 :(得分：0)
如果我理解你想要的东西，你可以创建一个类似static Arraylist的类，每次点击一个项目时都要附加。所以创建类似
public class Data class
{
static ArrayList<String> dataArray = new ArrayList<String>();;
public Data()
{
// empty constructor but could be used if needed
}
然后你可以在这里添加不同的getters/setters或任何你需要的东西。当您点击某个项目时，您只需调用类似
Data.dataArray.add("stuff");
然后在下一个Activity中检索此处的项目。
如果这太复杂或超出您的需要，那么您可以通过ArrayList
Intent或您需要的任何对象
此外，只是偏好，但由于您的所有Button都做同样的事情，您可以取消初始化它们并在所有这些上设置listeners。在xml中只需添加
`android:onClick="someFunctionName"`
到每个Button然后使用该函数名称
public void someFunctionName(View v) {
switch(v.getId()) {
// if one of the image buttons is pressed...
Intent intent = new Intent(this, Listviewact.class);
// pass ID of pressed button to listview-activity
intent.putExtra("buttonId", v.getId());
startActivity(intent);
break;
// here you could place handling of other clicks if necessary...
}
也不需要case语句，因为他们都做同样的事情而你在implements OnClickListener声明中不需要Activity