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本帖最后由 alltolove 于 2017-10-25 09:03 编辑
新建android项目,先在手机模拟器上添加两个联系人,出提示框选local选项,然后修改activity_main.xml- <?xml version="1.0" encoding="utf-8"?>
- <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:app="http://schemas.android.com/apk/res-auto"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- tools:context="com.example.xinwei.readcontacts.MainActivity">
- <ListView
- android:id="@+id/contacts_view"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
- </ListView>
- </android.support.constraint.ConstraintLayout>
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在AndroidManifest.xml的manifest标签下添加- <uses-permission android:name="android.permission.READ_CONTACTS" />
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修改mainactivity.java- import android.Manifest;
- import android.content.pm.PackageManager;
- import android.database.Cursor;
- import android.provider.ContactsContract;
- import android.support.annotation.NonNull;
- import android.support.v4.app.ActivityCompat;
- import android.support.v4.content.ContextCompat;
- import android.support.v7.app.AppCompatActivity;
- import android.os.Bundle;
- import android.widget.ArrayAdapter;
- import android.widget.ListView;
- import android.widget.Toast;
- import java.util.ArrayList;
- import java.util.List;
- public class MainActivity extends AppCompatActivity {
- ArrayAdapter<String> adapter;
- List<String> contactList = new ArrayList<>();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- ListView contactView=(ListView)findViewById(R.id.contacts_view);
- adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,contactList);
- contactView.setAdapter(adapter);
- if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)!= PackageManager.PERMISSION_GRANTED){
- ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_CONTACTS},1);
- }else{
- readContact();
- }
- }
- private void readContact() {
- Cursor cursor = null;
- try {
- 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 number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
- contactList.add(displayName + "\n" + number);
- }
- adapter.notifyDataSetChanged();
- }
- }catch(Exception e){
- e.printStackTrace();
- }finally {
- if(cursor!=null){
- cursor.close();
- }
- }
- }
- @Override
- public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
- super.onRequestPermissionsResult(requestCode, permissions, grantResults);
- switch (requestCode){
- case 1:
- if (grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED){
- readContact();
- }else{
- Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
- }
- break;
- default:
- }
- }
- }
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效果图:
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