Android 应用适配 Android 7.0 权限要求详解

public class AppMainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//在App中需要请求权限才能执行用户的操作
getPermissionToReadUserContacts();
}
//定义请求
private static final int READ_CONTACTS_REQUEST = 1;
//当用户执行的操作需要权限时候进行询问
public void getPermissionToReadUserContacts() {
/**
* 1)使用ContextCompat.chefkSelfPermission(),因为Context.permission
* 只在棒棒糖系统中使用
* 2）总是检查权限（即使权限被授予）因为用户可能会在设置中移除你的权限*/
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
//权限为获取，检查用户是否被询问过并且拒绝了，如果是这样的话，给予更多
//解释
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION) ||
ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE) ||
ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_PHONE_STATE)) {
//在界面上展示为什么需要读取联系人
Toast.makeText(this, "需要定位位置权限,手机电话权限和存储权限才可以正常工作", Toast.LENGTH_SHORT).show();
}
//发起请求获得用户许可,可以在此请求多个权限
ActivityCompat.requestPermissions(this, new String[]{
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.READ_PHONE_STATE},
READ_CONTACTS_REQUEST);
}
}
//从requestPermissions()方法回调结果
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//确保是我们的请求
if (requestCode == READ_CONTACTS_REQUEST) {
if (grantResults.length == 3 && grantResults[0] == PackageManager.PERMISSION_GRANTED
&& grantResults[1] == PackageManager.PERMISSION_GRANTED
&& grantResults[2] == PackageManager.PERMISSION_GRANTED) {
System.out.println("应用权限获取成功");
} else {
System.out.println("应用权限获取失败");
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}