package cm.android.sdk.permission;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.annotation.Nullable;
import android.support.annotation.StringRes;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import cm.android.sdk.permission.AfterPermissionGranted;
/**
* Created by Administrator on 2016/8/8.
*/
public class EasyPermissions {
public static final int SETTINGS_REQ_CODE = 16061;
private static final String TAG = "EasyPermissions";
public interface PermissionCallbacks extends
ActivityCompat.OnRequestPermissionsResultCallback {
void onPermissionsGranted(int requestCode, List<String> perms);
void onPermissionsDenied(int requestCode, List<String> perms);
}
/**
* Check if the calling context has a set of permissions.
*
* @param context the calling context.
* @param perms one ore more permissions, such as {@code android.Manifest.permission.CAMERA}.
* @return true if all permissions are already granted, false if at least one permission
* is not yet granted.
*/
public static boolean hasPermissions(Context context, String... perms) {
// Always return true for SDK < M, let the system deal with the permissions
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
Log.w(TAG, "hasPermissions: API version < M, returning true by default");
return true;
}
for (String perm : perms) {
boolean hasPerm = (ContextCompat.checkSelfPermission(context, perm) ==
PackageManager.PERMISSION_GRANTED);
if (!hasPerm) {
return false;
}
}
return true;
}
/**
* Request a set of permissions, showing rationale if the system requests it.
*
* @param object Activity or Fragment requesting permissions. Should implement
* {@link android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback}
* or
* {@link android.support.v13.app.FragmentCompat.OnRequestPermissionsResultCallback}
* @param rationale a message explaining why the application needs this set of permissions, will
* be displayed if the user rejects the request the first time.
* @param requestCode request code to track this request, must be < 256.
* @param perms a set of permissions to be requested.
*/
public static void requestPermissions(final Object object, String rationale,
final int requestCode, final String... perms) {
requestPermissions(object, rationale,
android.R.string.ok,
android.R.string.cancel,
requestCode, perms);
}
/**
* Request a set of permissions, showing rationale if the system requests it.
*
* @param object Activity or Fragment requesting permissions. Should implement
* {@link android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback}
* or
* {@link android.support.v13.app.FragmentCompat.OnRequestPermissionsResultCallback}
* @param rationale a message explaining why the application needs this set of permissions, will
* be displayed if the user rejects the request the first time.
* @param positiveButton custom text for positive button
* @param negativeButton custom text for negative button
* @param requestCode request code to track this request, must be < 256.
* @param perms a set of permissions to be requested.
*/
public static void requestPermissions(final Object object, String rationale,
@StringRes int positiveButton,
@StringRes int negativeButton,
final int requestCode, final String... perms) {
checkCallingObjectSuitability(object);
boolean shouldShowRationale = false;
for (String perm : perms) {
shouldShowRationale =
shouldShowRationale || shouldShowRequestPermissionRationale(object, perm);
}
if (shouldShowRationale) {
Activity activity = getActivity(object);
if (null == activity) {
return;
}
AlertDialog dialog = new AlertDialog.Builder(activity)
.setMessage(rationale)
.setPositiveButton(positiveButton, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
executePermissionsRequest(object, perms, requestCode);
}
})
.setNegativeButton(negativeButton, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// act as if the permissions were denied
if (object instanceof PermissionCallbacks) {
((PermissionCallbacks) object).onPermissionsDenied(requestCode, Arrays.asList(perms));
}
}
}).create();
dialog.show();
} else {
executePermissionsRequest(object, perms, requestCode);
}
}
/**
* Handle the result of a permission request, should be called from the calling Activity's
* {@link android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback#onRequestPermissionsResult(int, String[], int[])}
* method.
* <p>
* If any permissions were granted or denied, the Activity will receive the appropriate
* callbacks through {@link PermissionCallbacks} and methods annotated with
* {@link AfterPermissionGranted} will be run if appropriate.
*
* @param requestCode requestCode argument to permission result callback.
* @param permissions permissions argument to permission result callback.
* @param grantResults grantResults argument to permission result callback.
* @param object the calling Activity or Fragment.
* @throws IllegalArgumentException if the calling Activity does not implement
* {@link PermissionCallbacks}.
*/
public static void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults, Object object) {
checkCallingObjectSuitability(object);
// Make a collection of granted and denied permissions from the request.
ArrayList<String> granted = new ArrayList<>();
ArrayList<String> denied = new ArrayList<>();
for (int i = 0; i < permissions.length; i++) {
String perm = permissions[i];
if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
granted.add(perm);
} else {
denied.add(perm);
}
}
// Report granted permissions, if any.
if (!granted.isEmpty()) {
// Notify callbacks
if (object instanceof PermissionCallbacks) {
((PermissionCallbacks) object).onPermissionsGranted(requestCode, granted);
}
}
// Report denied permissions, if any.
if (!denied.isEmpty()) {
if (object instanceof PermissionCallbacks) {
((PermissionCallbacks) object).onPermissionsDenied(requestCode, denied);
}
}
// If 100% successful, call annotated methods
if (!granted.isEmpty() && denied.isEmpty()) {
runAnnotatedMethods(object, requestCode);
}
}
/**
* Calls {@link #checkDeniedPermissionsNeverAskAgain(Object, String, int, int, DialogInterface.OnClickListener, List)}
* with a {@code null} argument for the negatieb buttonOnClickListener.
*/
public static boolean checkDeniedPermissionsNeverAskAgain(final Object object,
String rationale,
@StringRes int positiveButton,
@StringRes int negativeButton,
List<String> deniedPerms) {
return checkDeniedPermissionsNeverAskAgain(object, rationale,
positiveButton, negativeButton, null, deniedPerms);
}
/**
* If user denied permissions with the flag NEVER ASK AGAIN, open a dialog explaining the
* permissions rationale again and directing the user to the app settings. After the user
* returned to the app, {@link Activity#onActivityResult(int, int, Intent)} or
* {@link Fragment#onActivityResult(int, int, Intent)} or
* {@link android.app.Fragment#onActivityResult(int, int, Intent)} will be called with
* {@value #SETTINGS_REQ_CODE} as requestCode
* <p>
* NOTE: use of this method is optional, should be called from
* {@link PermissionCallbacks#onPermissionsDenied(int, List)}
*
* @param object the calling Activity or Fragment.
* @param deniedPerms the set of denied permissions.
* @param negativeButtonOnClickListener negative button on click listener. If the
* user click the negative button, then this listener will
* be called. Pass null if you don't want to handle it.
* @return {@code true} if user denied at least one permission with the flag NEVER ASK AGAIN.
*/
public static boolean checkDeniedPermissionsNeverAskAgain(final Object object,
String rationale,
@StringRes int positiveButton,
@StringRes int negativeButton,
@Nullable DialogInterface.OnClickListener negativeButtonOnClickListener,
List<String> deniedPerms) {
boolean shouldShowRationale;
for (String perm : deniedPerms) {
shouldShowRationale = shouldShowRequestPermissionRationale(object, perm);
if (!shouldShowRationale) {
final Activity activity = getActivity(object);
if (null == activity) {
return true;
}
AlertDialog dialog = new AlertDialog.Builder(activity)
.setMessage(rationale)
.setPositiveButton(positiveButton, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", activity.getPackageName(), null);
intent.setData(uri);
startAppSettingsScreen(object, intent);
}
})
.setNegativeButton(negativeButton, negativeButtonOnClickListener)
.create();
dialog.show();
return true;
}
}
return false;
}
@TargetApi(23)
private static boolean shouldShowRequestPermissionRationale(Object object, String perm) {
if (object instanceof Activity) {
return ActivityCompat.shouldShowRequestPermissionRationale((Activity) object, perm);
} else if (object instanceof Fragment) {
return ((Fragment) object).shouldShowRequestPermissionRationale(perm);
} else if (object instanceof android.app.Fragment) {
return ((android.app.Fragment) object).shouldShowRequestPermissionRationale(perm);
} else {
return false;
}
}
@TargetApi(23)
private static void executePermissionsRequest(Object object, String[] perms, int requestCode) {
checkCallingObjectSuitability(object);
if (object instanceof Activity) {
ActivityCompat.requestPermissions((Activity) object, perms, requestCode);
} else if (object instanceof Fragment) {
((Fragment) object).requestPermissions(perms, requestCode);
} else if (object instanceof android.app.Fragment) {
((android.app.Fragment) object).requestPermissions(perms, requestCode);
}
}
@TargetApi(11)
private static Activity getActivity(Object object) {
if (object instanceof Activity) {
return ((Activity) object);
} else if (object instanceof Fragment) {
return ((Fragment) object).getActivity();
} else if (object instanceof android.app.Fragment) {
return ((android.app.Fragment) object).getActivity();
} else {
return null;
}
}
@TargetApi(11)
private static void startAppSettingsScreen(Object object,
Intent intent) {
if (object instanceof Activity) {
((Activity) object).startActivityForResult(intent, SETTINGS_REQ_CODE);
} else if (object instanceof Fragment) {
((Fragment) object).startActivityForResult(intent, SETTINGS_REQ_CODE);
} else if (object instanceof android.app.Fragment) {
((android.app.Fragment) object).startActivityForResult(intent, SETTINGS_REQ_CODE);
}
}
private static void runAnnotatedMethods(Object object, int requestCode) {
Class clazz = object.getClass();
if (isUsingAndroidAnnotations(object)) {
clazz = clazz.getSuperclass();
}
for (Method method : clazz.getDeclaredMethods()) {
if (method.isAnnotationPresent(AfterPermissionGranted.class)) {
// Check for annotated methods with matching request code.
AfterPermissionGranted ann = method.getAnnotation(AfterPermissionGranted.class);
if (ann.value() == requestCode) {
// Method must be void so that we can invoke it
if (method.getParameterTypes().length > 0) {
throw new RuntimeException(
"Cannot execute non-void method " + method.getName());
}
try {
// Make method accessible if private
if (!method.isAccessible()) {
method.setAccessible(true);
}
method.invoke(object);
} catch (IllegalAccessException e) {
Log.e(TAG, "runDefaultMethod:IllegalAccessException", e);
} catch (InvocationTargetException e) {
Log.e(TAG, "runDefaultMethod:InvocationTargetException", e);
}
}
}
}
}
private static void checkCallingObjectSuitability(Object object) {
// Make sure Object is an Activity or Fragment
boolean isActivity = object instanceof Activity;
boolean isSupportFragment = object instanceof Fragment;
boolean isAppFragment = object instanceof android.app.Fragment;
boolean isMinSdkM = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
if (!(isSupportFragment || isActivity || (isAppFragment && isMinSdkM))) {
if (isAppFragment) {
throw new IllegalArgumentException(
"Target SDK needs to be greater than 23 if caller is android.app.Fragment");
} else {
throw new IllegalArgumentException("Caller must be an Activity or a Fragment.");
}
}
}
private static boolean isUsingAndroidAnnotations(Object object) {
if (!object.getClass().getSimpleName().endsWith("_")) {
return false;
}
try {
Class clazz = Class.forName("org.androidannotations.api.view.HasViews");
return clazz.isInstance(object);
} catch (ClassNotFoundException e) {
return false;
}
}
}