内容简介:通过 PermissionUtil 对象作为门面将库暴露给使用模块。主要设置了 AppCompatActivity 和 Fragment 中获取权限的途径。将有关权限的操作封装成了 PermissionWrapper 对象。主要包括了判断权限是否获取,请求单个权限和请求多个权限的功能。直接调用系统方法 ContextCompat.checkSelfPermission(),通过返回值与 PackageManager.PERMISSION_GRANTED 进行比较返回结果。
通过 PermissionUtil 对象作为门面将库暴露给使用模块。主要设置了 AppCompatActivity 和 Fragment 中获取权限的途径。
public class PermissionUtil { public static PermissionWrapper with(AppCompatActivity activity) { return new PermissionWrapper(activity); } public static PermissionWrapper with(Fragment fragment) { return new PermissionWrapper(fragment); } } 复制代码
将有关权限的操作封装成了 PermissionWrapper 对象。主要包括了判断权限是否获取,请求单个权限和请求多个权限的功能。
public static class PermissionWrapper { private AppCompatActivity mActivity; private Fragment mFragment; PermissionWrapper(AppCompatActivity activity) { mActivity = activity; } PermissionWrapper(Fragment fragment) { mFragment = fragment; } public boolean isGranted(String permissionType) { int permissionCheck; if (mActivity != null) { permissionCheck = ContextCompat.checkSelfPermission(mActivity, permissionType); } else { permissionCheck = ContextCompat.checkSelfPermission(mFragment.getContext(), permissionType); } return permissionCheck == PackageManager.PERMISSION_GRANTED; } public PermissionRequestWrapper request(String permissionType) { if (mActivity != null) { return new PermissionRequestWrapper(mActivity, new String[]{permissionType}); } else { return new PermissionRequestWrapper(mFragment, new String[]{permissionType}); } } public PermissionRequestWrapper request(String ... permissionTypes) { if (mActivity != null) { return new PermissionRequestWrapper(mActivity, permissionTypes); } else { return new PermissionRequestWrapper(mFragment, permissionTypes); } } } 复制代码
- 判断权限是否获取
直接调用系统方法 ContextCompat.checkSelfPermission(),通过返回值与 PackageManager.PERMISSION_GRANTED 进行比较返回结果。
调用方式:
boolean hasContactsPermission = PermissionUtil.with(this).isGranted(Manifest.permission.WRITE_CONTACTS); 复制代码
- 请求单个权限和请求多个权限的功能
因为涉及到请求权限,我们将需要请求的权限封装成 PermissionRequestWrapper。
public static class PermissionRequestWrapper { private static final String TAG = PermissionRequestWrapper.class.getSimpleName(); private AppCompatActivity mActivity; private Fragment mFragment; private Func mDenyFunc; private Func mGrantFunc; private String[] mPermissionTypes; private List<SinglePermission> mPermissionsWeDontHave; private Func3 mRationalFunc; private int mRequestCode; private Func2 mResultFunc; public PermissionRequestWrapper(AppCompatActivity activity, String[] permissionTypes) { mActivity = activity; mPermissionTypes = permissionTypes; } public PermissionRequestWrapper(Fragment fragment, String[] permissionTypes) { mFragment = fragment; mPermissionTypes = permissionTypes; } public PermissionRequestWrapper requestCode(int reqCode) { mRequestCode = reqCode; int length = mPermissionTypes.length; mPermissionsWeDontHave = new ArrayList<>(length); for (String permissionType : mPermissionTypes) { mPermissionsWeDontHave.add(new SinglePermission(permissionType)); } if (needToRequest()) { Log.i(TAG, "Asking for permission"); if (mActivity != null) { ActivityCompat.requestPermissions(mActivity, mPermissionTypes, reqCode); } else { mFragment.requestPermissions(mPermissionTypes, reqCode); } } else { Log.i(TAG, "No need to ask for permission"); if (mGrantFunc != null) { mGrantFunc.call(); } } return this; } private boolean needToRequest() { List<SinglePermission> neededPermissions = new ArrayList<>(mPermissionsWeDontHave); for (int i = 0; i < mPermissionsWeDontHave.size(); i++) { SinglePermission perm = mPermissionsWeDontHave.get(i); int checkRes; if (mActivity != null) { checkRes = ContextCompat.checkSelfPermission(mActivity, perm.getPermissionName()); } else { checkRes = ContextCompat.checkSelfPermission(mFragment.getContext(), perm.getPermissionName()); } if (checkRes == PackageManager.PERMISSION_GRANTED) { neededPermissions.remove(perm); } else { boolean shouldShowRequestPermissionRationale; if (mActivity != null) { shouldShowRequestPermissionRationale = ActivityCompat.shouldShowRequestPermissionRationale(mActivity, perm.getPermissionName()); } else { shouldShowRequestPermissionRationale = mFragment.shouldShowRequestPermissionRationale(perm.getPermissionName()); } if (shouldShowRequestPermissionRationale) { perm.setRationalNeeded(true); } } } mPermissionsWeDontHave = neededPermissions; mPermissionTypes = new String[mPermissionsWeDontHave.size()]; for (int i = 0; i < mPermissionsWeDontHave.size(); i++) { mPermissionTypes[i] = mPermissionsWeDontHave.get(i).getPermissionName(); } return mPermissionsWeDontHave.size() != 0; } public PermissionRequestWrapper onRational(Func3 rationalFunc) { mRationalFunc = rationalFunc; return this; } public PermissionRequestWrapper onAllGranted(Func grantFunc) { mGrantFunc = grantFunc; return this; } public PermissionRequestWrapper onAnyDenied(Func denyFunc) { mDenyFunc = denyFunc; return this; } public PermissionRequestWrapper onResult(Func2 resultFunc) { mResultFunc = resultFunc; return this; } public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { if (mRequestCode == requestCode) { if (mResultFunc != null) { Log.i(TAG, "Calling Results Func"); mResultFunc.call(requestCode, permissions, grantResults); return; } for (int i = 0; i < permissions.length; i++) { if (grantResults[i] == PackageManager.PERMISSION_DENIED) { if (mPermissionsWeDontHave.get(i).isRationalNeeded() && mRationalFunc != null) { Log.i(TAG, "Calling Rational Func"); mRationalFunc.call(mPermissionsWeDontHave.get(i).getPermissionName()); } else if (mDenyFunc != null) { Log.i(TAG, "Calling Deny Func"); mDenyFunc.call(); } else { Log.e(TAG, "NUll DENY FUNCTIONS"); } return; } } if (mGrantFunc != null) { Log.i(TAG, "Calling Grant Func"); mGrantFunc.call(); } else { Log.e(TAG, "NUll GRANT FUNCTIONS"); } } } } 复制代码
- 请求单个权限
请求权限是通过 PermissionRequestWrapper.requestCode() 方法发起,通过传入的请求码进行标示。
public PermissionRequestWrapper requestCode(int reqCode) { mRequestCode = reqCode; int length = mPermissionTypes.length; mPermissionsWeDontHave = new ArrayList<>(length); for (String permissionType : mPermissionTypes) { mPermissionsWeDontHave.add(new SinglePermission(permissionType)); } if (needToRequest()) { Log.i(TAG, "Asking for permission"); if (mActivity != null) { ActivityCompat.requestPermissions(mActivity, mPermissionTypes, reqCode); } else { mFragment.requestPermissions(mPermissionTypes, reqCode); } } else { Log.i(TAG, "No need to ask for permission"); if (mGrantFunc != null) { mGrantFunc.call(); } } return this; } 复制代码
mPermissionTypes 是通过构建 PermissionRequestWrapper 对象时传入的,代表了想要请求的所有权限。并将它封装为请求对象 SinglePermission 保存在一个集合中。因为有可能我们会重复请求权限,所以需要判断哪些权限已经请求。
private boolean needToRequest() { List<SinglePermission> neededPermissions = new ArrayList<>(mPermissionsWeDontHave); for (int i = 0; i < mPermissionsWeDontHave.size(); i++) { SinglePermission perm = mPermissionsWeDontHave.get(i); int checkRes; if (mActivity != null) { checkRes = ContextCompat.checkSelfPermission(mActivity, perm.getPermissionName()); } else { checkRes = ContextCompat.checkSelfPermission(mFragment.getContext(), perm.getPermissionName()); } if (checkRes == PackageManager.PERMISSION_GRANTED) { neededPermissions.remove(perm); } else { boolean shouldShowRequestPermissionRationale; if (mActivity != null) { shouldShowRequestPermissionRationale = ActivityCompat.shouldShowRequestPermissionRationale(mActivity, perm.getPermissionName()); } else { shouldShowRequestPermissionRationale = mFragment.shouldShowRequestPermissionRationale(perm.getPermissionName()); } if (shouldShowRequestPermissionRationale) { perm.setRationalNeeded(true); } } } mPermissionsWeDontHave = neededPermissions; mPermissionTypes = new String[mPermissionsWeDontHave.size()]; for (int i = 0; i < mPermissionsWeDontHave.size(); i++) { mPermissionTypes[i] = mPermissionsWeDontHave.get(i).getPermissionName(); } return mPermissionsWeDontHave.size() != 0; } 复制代码
在方法中会遍历所有请求的权限,然后通过系统方法 ContextCompat.checkSelfPermission() 判断是否获取过。获取过则从集合中移除,没有获取过则跳过。最后通过集合中的权限请求数是否为 0 ,判断是否进行权限请求。
- 请求多个权限
与请求单个权限同样。只是将单个权限封装为一个集合进行处理。
方法回调
通过返回的 PermissionRequestWrapper 方法,可以设置对应的回调方法。包括合理的,同意的,拒绝的,获取所有参数的方法。
public PermissionRequestWrapper onRational(Func3 rationalFunc) { mRationalFunc = rationalFunc; return this; } public PermissionRequestWrapper onAllGranted(Func grantFunc) { mGrantFunc = grantFunc; return this; } public PermissionRequestWrapper onAnyDenied(Func denyFunc) { mDenyFunc = denyFunc; return this; } public PermissionRequestWrapper onResult(Func2 resultFunc) { mResultFunc = resultFunc; return this; } public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { if (mRequestCode == requestCode) { if (mResultFunc != null) { Log.i(TAG, "Calling Results Func"); mResultFunc.call(requestCode, permissions, grantResults); return; } for (int i = 0; i < permissions.length; i++) { if (grantResults[i] == PackageManager.PERMISSION_DENIED) { if (mPermissionsWeDontHave.get(i).isRationalNeeded() && mRationalFunc != null) { Log.i(TAG, "Calling Rational Func"); mRationalFunc.call(mPermissionsWeDontHave.get(i).getPermissionName()); } else if (mDenyFunc != null) { Log.i(TAG, "Calling Deny Func"); mDenyFunc.call(); } else { Log.e(TAG, "NUll DENY FUNCTIONS"); } return; } } if (mGrantFunc != null) { Log.i(TAG, "Calling Grant Func"); mGrantFunc.call(); } else { Log.e(TAG, "NUll GRANT FUNCTIONS"); } } } 复制代码
然后在 Activity 和 Fragment 的 onRequestPermissionsResult() 方法中进行调用 PermissionRequestWrapper 的 onRequestPermissionsResult() 方法。
@Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); } 复制代码
以上所述就是小编给大家介绍的《Android运行时权限处理》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!
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