Android6.0以后的某些权限需要动态申请，下面以一个打电话/获取手机联系人的权限为例，了解其具体实现。
获取打电话权限
AndroidManifest.xml中增加权限配置
<uses-permission-sdk-23 android:name="android.permission.CALL_PHONE"/>
MainActivity中的实现代码
public class MainActivity extends AppCompatActivity {
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.call_phone);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CALL_PHONE},1);
}else {
call();
}
}
});
}
@SuppressLint("MissingPermission")
private void call() {
try {
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:10086"));
startActivity(intent);
}catch (Exception e){
e.printStackTrace();
}
}
@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){
call();
}else {
Toast.makeText(MainActivity.this,"you denied the permission",Toast.LENGTH_SHORT).show();
}
break;
default:
}
}
}
获取联系人信息
权限配置
<uses-permission-sdk-23 android:name="android.permission.READ_CONTACTS" />
具体实现
public class MainActivity extends AppCompatActivity {
private ListView listView;
ArrayAdapter<String> adapter;
List<String> contacts = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView)findViewById(R.id.listview);
adapter = new ArrayAdapter<String>(this,R.layout.item,contacts);
listView.setAdapter(adapter);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS},1);
}else {
readContacts();
}
}
public void readContacts(){
Cursor cursor = null;
try {
//查询联系人数据
cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,null,null,null);
if (cursor != null){
while (cursor.moveToNext()){
//获取联系人姓名
String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
//获取联系人号
String displayNumber = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contacts.add(displayName+"\n"+displayNumber);
}
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){
readContacts();
}else {
Toast.makeText(this,"you denied permission",Toast.LENGTH_LONG).show();
}
break;
default:
}
}
}
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