Java 尝试在片段中实现所有列表活动
在我的android应用程序中,我试图检索用户安装的应用程序,并将它们放入一个片段中。不幸的是,没有FragmentListActivity支持,所以我不确定该怎么做,我需要帮助才能解决这个问题 我试图实现这个,除了一个片段 目前我有三个可滚动的选项卡,每个选项卡中都有片段 下面是我为InstalledAppActivity编写的java代码:Java 尝试在片段中实现所有列表活动,java,android,android-fragments,Java,Android,Android Fragments,在我的android应用程序中,我试图检索用户安装的应用程序,并将它们放入一个片段中。不幸的是,没有FragmentListActivity支持,所以我不确定该怎么做,我需要帮助才能解决这个问题 我试图实现这个,除了一个片段 目前我有三个可滚动的选项卡,每个选项卡中都有片段 下面是我为InstalledAppActivity编写的java代码: package com.spicycurryman.getdisciplined10.app; import android.app.AlertDi
package com.spicycurryman.getdisciplined10.app;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;
import com.javatechig.listapps.ApplicationAdapter;
import java.util.ArrayList;
import java.util.List;
public class InstalledAppActivity extends FragmentActivity {
private PackageManager packageManager = null;
private List<ApplicationInfo> applist = null;
private ApplicationAdapter listadaptor = null;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
packageManager = getPackageManager();
new LoadApplications().execute();
return inflater.inflate(R.layout.installed_apps, container, false);
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.block, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
boolean result = true;
switch (item.getItemId()) {
case R.id.main_text: {
displayAboutDialog();
break;
}
default: {
result = super.onOptionsItemSelected(item);
break;
}
}
return result;
}
private void displayAboutDialog() {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(getString(R.string.app_name));
builder.setMessage(getString(R.string.slogan));
builder.setPositiveButton("Know More", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://javatechig.com"));
startActivity(browserIntent);
dialog.cancel();
}
});
builder.setNegativeButton("No Thanks!", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
builder.show();
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
ApplicationInfo app = applist.get(position);
try {
Intent intent = packageManager
.getLaunchIntentForPackage(app.packageName);
if (null != intent) {
startActivity(intent);
}
} catch (ActivityNotFoundException e) {
Toast.makeText(InstalledAppActivity.this, e.getMessage(),
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(InstalledAppActivity.this, e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
private List<ApplicationInfo> checkForLaunchIntent(List<ApplicationInfo> list) {
ArrayList<ApplicationInfo> applist = new ArrayList<ApplicationInfo>();
for (ApplicationInfo info : list) {
try {
if (null != packageManager.getLaunchIntentForPackage(info.packageName)) {
applist.add(info);
}
} catch (Exception e) {
e.printStackTrace();
}
}
return applist;
}
private class LoadApplications extends AsyncTask<Void, Void, Void> {
private ProgressDialog progress = null;
@Override
protected Void doInBackground(Void... params) {
applist = checkForLaunchIntent(packageManager.getInstalledApplications(PackageManager.GET_META_DATA));
listadaptor = new ApplicationAdapter(InstalledAppActivity.this,
R.layout.snippet_list_row, applist);
return null;
}
@Override
protected void onCancelled() {
super.onCancelled();
}
@Override
protected void onPostExecute(Void result) {
setListAdapter(listadaptor);
progress.dismiss();
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
progress = ProgressDialog.show(InstalledAppActivity.this, null,
"Loading application info...");
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
}
无法调用onListItemClick方法,因为不存在FragmentListActivity。因此,我不确定如何修复此问题以及扩展什么
这也会在我的TabsPagerAdapter类中导致错误,该类也链接到问题的同一来源
基本上,我正在尝试修复它,以便列表可以显示在我的片段活动中。将InstalledAppActivity更改为扩展ListFragment。如果有一个ListFragment可能会对您有所帮助,则FragmentActivity是一个片段,而不是一个活动。您需要修改/克隆InstalledAppActivity以从Fragment继承,这样您的想法才能发挥作用。ListFragment有何帮助?我到底应该如何修改/克隆?