我试图从ListView项目中检索值为" mylistview.getItemAtPosition(position(.toString(("，但它只返回我正在单击的项目的位置。
我的主要活动.java：
public class MainActivity extends AppCompatActivity{
RelativeLayout rl1;
Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bhash,bStar,del,call;
EditText editText;
Intent phoneIntent,callIntent;
getContacts.MyAdapter myAdapter;
ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
rl1=(RelativeLayout) findViewById(R.id.relativeLayout);
rl1.setVisibility(View.GONE);
editText = (EditText)findViewById(R.id.textView);
editText.setShowSoftInputOnFocus(false);
b1 = (Button)findViewById(R.id.button);
b2 = (Button)findViewById(R.id.button2);
b3 = (Button)findViewById(R.id.button3);
b4 = (Button)findViewById(R.id.button4);
b5 = (Button)findViewById(R.id.button5);
b6 = (Button)findViewById(R.id.button6);
b7 = (Button)findViewById(R.id.button7);
b8 = (Button)findViewById(R.id.button8);
b9 = (Button)findViewById(R.id.button9);
b0 = (Button)findViewById(R.id.button0);
bhash = (Button)findViewById(R.id.buttonHash);
bStar = (Button)findViewById(R.id.buttonStar);
call = (Button) findViewById(R.id.buttonCall);
del = (Button)findViewById(R.id.buttonDel);
getContacts.getAllContacts(this.getContentResolver());
myAdapter = new getContacts.MyAdapter(getApplicationContext());
final List<Object> name2 = new ArrayList<>();
final ListView lv= (ListView) findViewById(R.id.lv);
lv.setAdapter(myAdapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Toast.makeText(MainActivity.this, lv.getItemAtPosition(position).toString(), Toast.LENGTH_SHORT).show();
}
});
phoneIntent = new Intent(Intent.ACTION_CALL);
callIntent = new Intent(Intent.ACTION_CALL);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
rl1.setVisibility(rl1.isShown()?View.GONE:View.VISIBLE);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"1" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"2"+str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"3" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"4" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"5" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"6" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"7" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"8" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"9" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
b0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"0" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
bhash.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"#" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
bStar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int pos = editText.getSelectionStart();
String str = editText.getText().toString();
String str1 = (String) str.substring(0, pos);
String str2 = (String) str.substring(pos);
editText.setText(str1+"*" +str2);
int pos1 = pos+1;
editText.setSelection(pos1);
}
});
call.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String number = editText.getText().toString();
if (number.charAt(0)!='*') {
if (number.length()<=9)
{
Toast.makeText(MainActivity.this, "Please enter a valid number", Toast.LENGTH_SHORT).show();
}
else {
phoneIntent.setData(Uri.parse("tel:" + number));
startActivity(phoneIntent);
}
}
else if (number.subSequence(number.length()-1,number.length()).equals("#"))
{
number = number.substring(0, number.length() - 1);
String callInfo = "tel:" + number + Uri.encode("#");
callIntent.setData(Uri.parse(callInfo));
startActivity(callIntent);
}
}
});
del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int posElse = editText.getSelectionStart();
String text = editText.getText().toString();
if(text.length()!=0 && posElse >= 1) {
int pos = editText.getSelectionStart();
String str1 = (String) text.substring(0, pos-1);
if(str1.equals(null))
{
}
String str2 = (String) text.substring(pos);
String latest = str1+str2;
editText.setText(latest);
int pos1 = pos-1;
editText.setSelection(pos1);
}
else if ( posElse < 1)
{
int pos = editText.getSelectionStart();
String str2 = (String) text.substring(pos);
String latest = str2;
editText.setText(latest);
int pos1 = pos;
editText.setSelection(pos1);
}
}
});
del.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if (del.equals(v))
{
editText.setText("");
}
return false;
}
});
/*Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).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.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我的联系人.java：
public class getContacts {
static List<String> name1 = new ArrayList<String>();
static List<String> phno1 = new ArrayList<String>();
public static void getAllContacts(ContentResolver cr) {
Cursor phones = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, null);
while (phones.moveToNext())
{
String name=phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
System.out.println(".................."+phoneNumber);
name1.add(name);
phno1.add(phoneNumber);
}
phones.close();
}
static class MyAdapter extends BaseAdapter
{
private SparseBooleanArray mCheckStates;
LayoutInflater mInflater;
TextView tv1,tv;
MyAdapter(Context ctx)
{
mCheckStates = new SparseBooleanArray(name1.size());
//mInflater = (LayoutInflater)Display.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return name1.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi=convertView;
if(convertView==null)
vi = mInflater.inflate(R.layout.row, null);
TextView tv= (TextView) vi.findViewById(R.id.textView1);
tv1= (TextView) vi.findViewById(R.id.textView2);
tv.setText(name1.get(position));
// tv1.setText(phno1.get(position));
return vi;
}
}
}
有人可以帮我从选定的列表项中获取数据吗？
您可以尝试在适配器中制作方法，如下所示：
public String getName(int position) {
return name1.get(position);
}
public String getPhoneNumber(int position) {
return phno1.get(position);
}
既然你说你得到了索引，那就在适配器对象的主活动中调用这些方法。仅当数组列表中项的位置匹配时，这才有效。
我还建议使用对象来存储数据，请在此处查找更多信息：https://www.raywenderlich.com/124438/android-listview-tutorial