以下是一个使用拨号键(字母组合/排列)来搜索Android通讯录的解决方法的代码示例:
import android.Manifest;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private EditText searchEditText;
private ListView resultsListView;
private List contactsList;
private ArrayAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
searchEditText = findViewById(R.id.searchEditText);
resultsListView = findViewById(R.id.resultsListView);
contactsList = new ArrayList<>();
adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, contactsList);
resultsListView.setAdapter(adapter);
searchEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
String searchText = charSequence.toString();
searchContacts(searchText);
}
@Override
public void afterTextChanged(Editable editable) {
}
});
// 检查读取联系人权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS}, 1);
} else {
loadContacts();
}
}
// 加载联系人数据
private void loadContacts() {
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contactsList.add(displayName + " - " + phoneNumber);
}
cursor.close();
adapter.notifyDataSetChanged();
}
}
// 搜索联系人
private void searchContacts(String searchText) {
contactsList.clear();
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " like ?",
new String[]{"%" + searchText + "%"},
null);
if (cursor != null) {
while (cursor.moveToNext()) {
String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contactsList.add(displayName + " - " + phoneNumber);
}
cursor.close();
adapter.notifyDataSetChanged();
}
}
}
以上是一个基本的示例,可以根据实际需求进行修改和改进。当用户在EditText中输入拨号键时,会实时搜索通讯录中与输入内容匹配的联系人,并将结果显示在ListView中。
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