android权限动态检测工具类

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代码：

/**
 * created by ： bifan-wei
 */
public class PermissionChecker {
    private String tag = "PermissionChecker";
    private final int PermissionChecker_requestCode = 0x04;

    private AppCompatActivity context;
    private String[] Permissions;

    public PermissionChecker(AppCompatActivity context) {
        this.context = context;
    }

    public void requestPermission(String... permissions) {
        if (!checkPermission(permissions)) {
            ActivityCompat.requestPermissions(context,
                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                    PermissionChecker_requestCode);
        }
    }


    public boolean checkPermission(String... permissions) {
        if (permissions != null && permissions.length > 0) {
            this.Permissions = permissions;
            for (String p : permissions) {
                if (!permissionIsPermitted(p)) {
                    return false;
                }
            }
        }
        return true;
    }

    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults, IPermissionCheckListener checkListener) {
        switch (requestCode) {
            case PermissionChecker_requestCode: {
                if (grantResults.length > 0) {
                    if (grantResults.length == permissions.length) {
                        List<String> denies = new ArrayList<>();
                        for (int i = 0; i < grantResults.length; i++) {
                            if (grantResults[i] == android.content.pm.PackageManager.PERMISSION_DENIED) {
                                denies.add(Permissions[i]);
                            }
                        }
                        if (checkListener != null) {
                            if (denies.size() > 0) {
                                checkListener.onUnPermit((String[]) denies.toArray());
                            } else {
                                checkListener.onPermit();
                            }
                        }
                    } else {
                        Log.e("PermissionsCheck", "error may caused,grantResults.length != permissions.length");
                        if (checkListener != null) {
                            checkListener.onException();
                        }
                    }
                } else {
                    if (checkListener != null) {
                        checkListener.onException();
                    }
                }

                return;
            }
        }
    }

    public boolean permissionIsPermitted(String permission) {
        return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
    }


    public interface IPermissionCheckListener {
        void onPermit();
        void onException();
        void onUnPermit(String[] permissions);
    }
}

使用：

 permissionChecker = new PermissionChecker(this);
        permissionChecker.requestPermission(
                Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.ACCESS_NETWORK_STATE,
                Manifest.permission.ACCESS_WIFI_STATE,
                Manifest.permission.DISABLE_KEYGUARD,
                Manifest.permission.READ_EXTERNAL_STORAGE
                );


    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(permissionChecker!=null){
            permissionChecker.onRequestPermissionsResult(requestCode, permissions, grantResults, new PermissionChecker.IPermissionCheckListener() {
                @Override
                public void onPermit() {
                    showToast("onPermit");
                }

                @Override
                public void onException() {
                    showToast("onException");
                }

                @Override
                public void onUnPermit(String[] permissions) {
                  showToast("请确保权限已开启");
                }
            });
        }else{
            showToast("permissionChecker==null");
        }
    }

注意：如果targetSdkVersion 23 小于23，将不会弹出是否允许权限对话框