标题 ## Android中获取系统通讯录联系人并显示在EditText

1.需求
一个EditText 点击button的时候转到系统通讯录，选中其中一个通讯录item返回当前界面且把
选中的联系人号码用户名显示在EditText 上。
2.示例

3.代码
AddressList.java

public class AddressList extends CheckPermissionsActivity {EditText text;String username,usernumber;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.address_list);text = (EditText)findViewById(R.id.number);}public void click(View v){startActivityForResult(new Intent(Intent.ACTION_PICK,ContactsContract.Contacts.CONTENT_URI), 0);}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == Activity.RESULT_OK) {ContentResolver reContentResolverol = getContentResolver();Uri contactData = data.getData();@SuppressWarnings("deprecation")Cursor cursor = managedQuery(contactData, null, null, null, null);cursor.moveToFirst();username = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));Cursor phone = reContentResolverol.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + contactId,null,null);while (phone.moveToNext()) {usernumber = phone.getString(phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));text.setText(usernumber+" ("+username+")");}}}
}

address_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextViewandroid:text="联系人"android:textSize="45px"android:layout_width="match_parent"android:layout_height="wrap_content" /><EditTextandroid:id="@+id/number"android:layout_width="match_parent"android:layout_height="wrap_content" /><Buttonandroid:id="@+id/btn_number"android:text="选择联系人"android:onClick="click"android:layout_width="match_parent"android:layout_height="wrap_content" />
</LinearLayout>

在manifest 文件中已经添加了user-permission

<uses-permission android:name="android.permission.WRITE_CONTACTS"></uses-permission>  <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission> 

可能出现错误提示：

Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{49af1fb 14363:com.example.gszczepanski.eduandroid/u0a59} (pid=14363, uid=10059) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS

错误提示的意思是：需要用户自己去添加对contacts 的授权，而不是让系统给授权，这都是android 6.0及以上的设备上才出现的问题，google 主要是处于安全的考虑，才添加的机制；
解决的方法是：弹出授权提示框，提醒用户授权；

故，增加一个CheckPermissionsActivity
代码如下：

/*** 继承了Activity，实现Android6.0的运行时权限检测* 需要进行运行时权限检测的Activity可以继承这个类** @项目名称： AMapLocationDemo* @文件名称：PermissionsChecker.java* @类型名称：PermissionsChecker* @since 2.5.0*/
public class CheckPermissionsActivity extends ActivityimplementsActivityCompat.OnRequestPermissionsResultCallback {/*** 需要进行检测的权限数组*/protected String[] needPermissions = {Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.READ_PHONE_STATE,Manifest.permission.DISABLE_KEYGUARD,Manifest.permission.RECEIVE_BOOT_COMPLETED,Manifest.permission.READ_CONTACTS,};private static final int PERMISSON_REQUESTCODE = 0;/*** 判断是否需要检测，防止不停的弹框*/private boolean isNeedCheck = true;@Overrideprotected void onResume() {super.onResume();if(isNeedCheck){checkPermissions(needPermissions);}}/*** * @param needRequestPermissonList* @since 2.5.0**/private void checkPermissions(String... permissions) {List<String> needRequestPermissonList = findDeniedPermissions(permissions);if (null != needRequestPermissonList&& needRequestPermissonList.size() > 0) {ActivityCompat.requestPermissions(this,needRequestPermissonList.toArray(new String[needRequestPermissonList.size()]),PERMISSON_REQUESTCODE);}}/*** 获取权限集中需要申请权限的列表* * @param permissions* @return* @since 2.5.0**/private List<String> findDeniedPermissions(String[] permissions) {List<String> needRequestPermissonList = new ArrayList<String>();for (String perm : permissions) {if (ContextCompat.checkSelfPermission(this,perm) != PackageManager.PERMISSION_GRANTED|| ActivityCompat.shouldShowRequestPermissionRationale(this, perm)) {needRequestPermissonList.add(perm);} }return needRequestPermissonList;}/*** 检测是否说有的权限都已经授权* @param grantResults* @return* @since 2.5.0**/private boolean verifyPermissions(int[] grantResults) {for (int result : grantResults) {if (result != PackageManager.PERMISSION_GRANTED) {return false;}}return true;}@Overridepublic void onRequestPermissionsResult(int requestCode,String[] permissions, int[] paramArrayOfInt) {if (requestCode == PERMISSON_REQUESTCODE) {if (!verifyPermissions(paramArrayOfInt)) {showMissingPermissionDialog();isNeedCheck = false;}}}/*** 显示提示信息* * @since 2.5.0**/private void showMissingPermissionDialog() {AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle(R.string.notifyTitle);builder.setMessage(R.string.notifyMsg);// 拒绝, 退出应用builder.setNegativeButton(R.string.cancel,new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {finish();}});builder.setPositiveButton(R.string.setting,new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {startAppSettings();}});builder.setCancelable(false);builder.show();}/***  启动应用的设置* * @since 2.5.0**/private void startAppSettings() {Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);intent.setData(Uri.parse("package:" + getPackageName()));startActivity(intent);}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK){this.finish();return true;}return super.onKeyDown(keyCode, event);}}

只需在上面的权限数组中添加所需权限即可：
Manifest.permission.READ_CONTACTS,

修改strings.xml

<resources><string name="app_name">ScreenLocker2</string><string name="notifyTitle">提示</string><string name="notifyMsg">当前应用缺少必要权限。\n\n请点击\"设置\"-\"权限\"-打开所需权限。</string><string name="setting">设置</string><string name="cancel">取消</string>
</resources>

最后让需要权限的Activity继承于CheckPermissionsActivity即可
运行：