新增權限請求功能

app/src/main/java/ecom/android/newparkapp/database/InfoDatabase.java

@@ -34,7 +34,8 @@ import ecom.android.newparkapp.entity.VehicleColor;
 import ecom.android.newparkapp.entity.VehicleType;
 
 // DataBase 一個資料庫一個，並涵蓋多個資料表
-@Database(entities = {Case.class, Road.class, Space.class, SpaceRate.class, SpaceStatus.class, SpaceType.class, User.class, UserPermission.class, VehicleBrand.class, VehicleColor.class, VehicleType.class}, version = 1)
+@Database(entities = {Case.class, Road.class, Space.class, SpaceRate.class, SpaceStatus.class, SpaceType.class, User.class, UserPermission.class, VehicleBrand.class, VehicleColor.class, VehicleType.class},
+        version = 1)
 @TypeConverters({LocationConverter.class, TimestampConverter.class})
 public abstract class InfoDatabase extends RoomDatabase {
     public abstract CaseDao caseDao();

app/src/main/java/ecom/android/newparkapp/view/MainActivity.java

 package ecom.android.newparkapp.view;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.databinding.DataBindingUtil;
-import androidx.lifecycle.ViewModelProvider;
+import static android.Manifest.permission.ACCESS_COARSE_LOCATION;
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static android.Manifest.permission.ACCESS_LOCATION_EXTRA_COMMANDS;
+import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
+import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
 
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.widget.Toast;
 
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.databinding.DataBindingUtil;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModelProvider;
+
+import java.util.Map;
+
 import ecom.android.newparkapp.R;
 import ecom.android.newparkapp.databinding.ActivityMainBinding;
-import ecom.android.newparkapp.repository.InfoRepository;
 import ecom.android.newparkapp.viewModel.UserViewModel;
 
 public class MainActivity extends AppCompatActivity {
@@ -18,19 +30,66 @@ public class MainActivity extends AppCompatActivity {
     private ActivityMainBinding dataBinding;
     private ViewModelProvider viewModelProvider;
     private UserViewModel userViewModel;
+    private ActivityResultLauncher<String[]> requestPermissionLauncher;
+    private String[] permissions = new String[]{ WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE,
+            ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION, ACCESS_LOCATION_EXTRA_COMMANDS};
+    private MutableLiveData<Boolean> hasPermissions = new MutableLiveData<>();
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         dataBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);
-
         viewModelProvider = new ViewModelProvider(this);
         userViewModel = viewModelProvider.get(UserViewModel.class);
+
         userViewModel.setCurrentUser();
 
         dataBinding.setUserViewModel(userViewModel);
 
-        eventBinding();
+        resultLauncherRegister();
+        // 檢查權限
+        permissionRequest();
+
+        hasPermissions.observe(this, has -> {
+            if (has){
+                eventBinding();
+            }
+        });
+    }
+
+    private void permissionRequest(){
+//        參考資料 https://developer.android.com/training/permissions/requesting
+        hasPermissions.setValue(false);
+        if (!checkPermissions()){
+            requestPermissionLauncher.launch(permissions);
+        }else {
+            hasPermissions.setValue(true);
+        }
+    }
+
+    private boolean checkPermissions(){
+        boolean ret = true;
+        for (String permission : permissions){
+            if(ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED){
+                ret = false;
+                break;
+            }
+        }
+        return ret;
+    }
+
+    private void resultLauncherRegister(){
+        requestPermissionLauncher = registerForActivityResult(
+                new ActivityResultContracts.RequestMultiplePermissions(),
+                results -> {
+                    for (Map.Entry<String, Boolean> result : results.entrySet()) {
+                        if (!result.getValue()){
+                            return;
+                        }
+                    }
+                    hasPermissions.setValue(true);
+                }
+        );
     }
 
     /**