Pros of Dexter

• Simpler API with a more intuitive interface for handling multiple permissions
• Built-in support for handling rationale and permanently denied cases
• Easier to integrate into existing projects without RxJava dependency

Cons of Dexter

• Less flexible for complex permission scenarios
• Not as well-suited for projects already using RxJava
• Slightly more verbose for single permission requests

Code Comparison

Dexter:

Dexter.withActivity(this)
    .withPermission(Manifest.permission.CAMERA)
    .withListener(new PermissionListener() {
        @Override public void onPermissionGranted(PermissionGrantedResponse response) { /* ... */ }
        @Override public void onPermissionDenied(PermissionDeniedResponse response) { /* ... */ }
        @Override public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) { /* ... */ }
    }).check();

RxPermissions:

RxPermissions rxPermissions = new RxPermissions(this);
rxPermissions
    .request(Manifest.permission.CAMERA)
    .subscribe(granted -> {
        if (granted) { /* ... */ } else { /* ... */ }
    });

Both libraries simplify Android runtime permissions, but Dexter offers a more straightforward API for handling complex permission scenarios, while RxPermissions integrates seamlessly with RxJava workflows. Choose based on your project's existing architecture and specific permission handling needs.

Pros of PermissionsDispatcher

• Uses annotation processing, which can lead to cleaner and more maintainable code
• Provides a more declarative approach to handling permissions
• Offers built-in support for handling permission rationale

Cons of PermissionsDispatcher

• Requires additional setup and configuration compared to RxPermissions
• May have a steeper learning curve for developers unfamiliar with annotation processing
• Can increase build times due to the annotation processing step

Code Comparison

PermissionsDispatcher:

@RuntimePermissions
public class MainActivity extends AppCompatActivity {
    @NeedsPermission(Manifest.permission.CAMERA)
    void showCamera() {
        // Camera permission granted
    }
}

RxPermissions:

RxPermissions rxPermissions = new RxPermissions(this);
rxPermissions
    .request(Manifest.permission.CAMERA)
    .subscribe(granted -> {
        if (granted) {
            // Camera permission granted
        }
    });

PermissionsDispatcher uses annotations to define permission requirements and callbacks, while RxPermissions employs a more reactive approach with RxJava. PermissionsDispatcher's code is more declarative, but RxPermissions offers a more flexible and composable solution, especially when dealing with multiple permissions or complex permission flows.

Pros of EasyPermissions

• Simpler API and easier to use for basic permission handling
• Supports both Activity and Fragment contexts
• Includes built-in rationale handling and UI for permission requests

Cons of EasyPermissions

• Less flexible for complex permission scenarios
• Not based on reactive programming paradigms
• May require more boilerplate code for advanced use cases

Code Comparison

EasyPermissions:

@AfterPermissionGranted(RC_CAMERA_AND_LOCATION)
private void methodRequiresTwoPermission() {
    String[] perms = {Manifest.permission.CAMERA, Manifest.permission.ACCESS_FINE_LOCATION};
    if (EasyPermissions.hasPermissions(this, perms)) {
        // Already have permission, do the thing
    } else {
        // Do not have permissions, request them now
        EasyPermissions.requestPermissions(this, getString(R.string.camera_and_location_rationale),
                RC_CAMERA_AND_LOCATION, perms);
    }
}

RxPermissions:

RxPermissions rxPermissions = new RxPermissions(this);
rxPermissions
    .request(Manifest.permission.CAMERA, Manifest.permission.ACCESS_FINE_LOCATION)
    .subscribe(granted -> {
        if (granted) {
            // All requested permissions are granted
        } else {
            // At least one permission is denied
        }
    });

Pros of TedPermission

• Simpler API with less boilerplate code
• Supports both Kotlin and Java
• Includes a built-in rationale dialog for explaining permissions

Cons of TedPermission

• Less flexible for complex permission scenarios
• May not integrate as well with RxJava-based projects
• Fewer customization options for permission request flow

Code Comparison

TedPermission:

TedPermission.create()
    .setPermissions(Manifest.permission.CAMERA)
    .check()

RxPermissions:

rxPermissions
    .request(Manifest.permission.CAMERA)
    .subscribe { granted ->
        if (granted) {
            // Permission granted
        } else {
            // Permission denied
        }
    }

TedPermission offers a more straightforward approach with less code, while RxPermissions provides better integration with reactive programming paradigms. TedPermission is easier to use for simple permission requests, but RxPermissions offers more flexibility for complex scenarios and better fits into RxJava-based architectures.

Both libraries aim to simplify Android runtime permissions, but they cater to different development styles and project requirements. The choice between them depends on the specific needs of the project and the developer's familiarity with reactive programming concepts.