我正在編寫一個代碼,其中用戶選擇一些應用程序作爲敏感來將鎖定給它們。我使用API22中預定義的佈局android.R.layout.simple_list_item_multiple_choice
,其中包含CheckedTextView
。我無法檢索用戶選擇了哪些項目。我在Listener
中嘗試了一些操作,但我無法獲得所需的輸出。 請幫助我走上正軌。Android:從ListView中獲取所選項目
SensitiveApps.java
package com.sr.droidlock;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Switch;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class SensitiveApps extends ActionBarActivity {
ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sensitive_apps);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setIcon(R.drawable.sensitive);
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
final List pkgAppsList = getPackageManager().queryIntentActivities(mainIntent, 0);
ArrayList<String> tasks = new ArrayList<String>();
String title;
for (Object object : pkgAppsList) {
ResolveInfo info = (ResolveInfo) object;
title = (String) ((info != null) ? getBaseContext().getPackageManager().getApplicationLabel(info.activityInfo.applicationInfo) : "???");
tasks.add(title);
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, tasks);
adapter.sort(new Comparator<String>() {
@Override
public int compare(String lhs, String rhs) {
return lhs.compareToIgnoreCase(rhs);
}
});
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
listView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String str = listView.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), str, Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
//Do nothing
}
});
}
}
use'listView.setOnItemClickListener()' –