Android 中运行时权限获取联系人信息 Demo

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
";
 
        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;
        }
    }
}