我有一个简单的一键应用程序。该应用程序显示一个调用电话的按钮。我在将代码清晰地重构为 MVP 架构时遇到困难。还有一个类似的问题( What's the best way to check for permissions at runtime using MVP architecture? )。然而,在这个问题中,答案还不够明确,无法应用于我的问题。
演示者的 View 中无法识别权限请求。我遇到的问题是在 startActivity(intent); 的 View 中。 Android Studio 用红色强调了 Intent ,并告诉我“调用需要权限,可能会被用户拒绝。代码应显式检查权限”。
为什么这种重构是错误的?我该如何纠正它以遵守 MVP 架构?
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void BtnSetEmergency_onclick(View view) {
String number = "1112223333";
final int REQUEST_PHONE_CALL = 1;
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + number));
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MainActivity.this, "One Button App", LENGTH_SHORT).show();
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
}
else{
startActivity(intent);
}
return;
}
startActivity(intent);
}
}
我重构 MVP 架构的尝试
查看
public class MainActivity extends AppCompatActivity {
mainActivityPresenter mainActivityPresenterObject = new mainActivityPresenter();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void BtnSetEmergency_onclick(View view) {
boolean phonePermissions = false;
String number = "1112223333";
final int REQUEST_PHONE_CALL = 1;
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + number));
phonePermissions = mainActivityPresenterObject.checkPhonePermissions(view);
if(phonePermissions == true){
startActivity(intent);
}else if (phonePermissions == false){
}
}
}
演讲者
public class mainActivityPresenter {
public boolean checkPhonePermissions(View view){
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MainActivity.this "One Button App", LENGTH_SHORT).show();
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
return false;
}
else
{
return true;
}
}
return false;
}
}
================================================== ============>
编辑:应用基于 Nilesh Rathod 答案的最终答案
================================================== ============>
查看
public class MainActivity extends AppCompatActivity {
mainActivityPresenter mainActivityPresenterObject = new mainActivityPresenter();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void BtnSetEmergency_onclick(View view) {
boolean phonePermissions = false;
int number = 1112223333;
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + Integer.toString(number)));
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE)
== PackageManager.PERMISSION_GRANTED) {
startActivity(intent);
}else {
mainActivityPresenterObject.checkPhonePermissions(view, MainActivity.this);
}
}
}
演讲者
public class mainActivityPresenter {
final int REQUEST_PHONE_CALL = 1;
public void checkPhonePermissions(View view, MainActivity mainActivity){
ActivityCompat.requestPermissions(mainActivity, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
}
}
最佳答案
"Call requires permission which may be rejected by the user. The code should explicitly check for permissions"
其行为符合预期。
使用 startActivity(intent);
仅供引用
您可以使用 ActivityCompat.OnRequestPermissionsResultCall
处理权限对话框的结果
This interface is the contract for receiving the results for permission requests
试试这个
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE)
== PackageManager.PERMISSION_GRANTED) {
startActivity(intent);
}else {
// ask here for call permission
}
关于java - 安卓3.1 : Refactoring Button Code and Permissions to MVP Architecture,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49745115/