代码比较简单...

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="club.seliote.readcontact"> <uses-permission android:name="android.permission.READ_CONTACTS"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>

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="club.seliote.readcontact.MainActivity"> <TextView android:id="@+id/text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Unknow Data" android:scrollbars="vertical" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout>

MainActivity.java

package club.seliote.readcontact; import android.Manifest;import android.content.ContentResolver;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.text.method.ScrollingMovementMethod;import android.widget.TextView;import android.widget.Toast; import java.util.HashMap;import java.util.Map; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.activity_main); Map<String, String> contacts = null; if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_CONTACTS}, 0); } else { contacts = readContact(); } String displayString = "UserName : PhoneNumber\n\n"; if (contacts != null && !contacts.isEmpty()) { for (Map.Entry<String, String> entry : contacts.entrySet()) { displayString += entry.getKey() + " : " + entry.getValue() + "\n"; } } TextView textView = (TextView) this.findViewById(R.id.text_view); textView.setMovementMethod(ScrollingMovementMethod.getInstance()); textView.setText(displayString); } private Map<String, String> readContact() { Map<String, String> contacts = new HashMap<>(); try (Cursor cursor = MainActivity.this.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null)) { cursor.moveToFirst(); while (!cursor.isAfterLast()) { String userName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); String phoneNum = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); contacts.put(userName, phoneNum); cursor.moveToNext(); } } catch (SecurityException exp) { exp.printStackTrace(); } return contacts; } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case 0 : if (permissions[0] == Manifest.permission.READ_CONTACTS && grantResults[0] == PackageManager.PERMISSION_GRANTED) { readContact(); } else { Toast.makeText(MainActivity.this, "Permisson deny!", Toast.LENGTH_LONG).show(); } break; default: break; } }}