前几天遇到一个需求强制用户去申请某个权限，大家都知道(Api 23)以后官方提出动态权限，所以我们要提示用户打开权限，实现功能后总结了一下实现方法，下面来说一下我是怎么强制用户去申请权限的：

1.先介绍一下平时申请动态权限常用的一些API：

//用于检测权限是否打开

ContextCompat.checkSelfPermission(@NonNull Context context, @NonNull String permission) == PackageManager.PERMISSION_DENIED

//去申请权限

ActivityCompat.requestPermissions(final @NonNull Activity activity,final @NonNull String[] permissions, final @IntRange(from =0)int requestCode)

//返回权限申请结果

onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)

2.几句话说明强制用户申请权限流程：

1.判断用户是否打开权限   checkSelfPermission()

2.如果用户没有打开权限则去申请权限  requestPermissions()

3.返回申请结果  onRequestPermissionsResult()

4.判断用户是否决绝权限  grantResult == PackageManager.PERMISSION_DENIED

5.如果用户拒绝则提示弹出Dialog提示去设置页面打开权限

6.在onActivityResult()判断全是是否打开，如果没有调用 requestPermissions()去申请权限

上面是一个循环申请的过程

3.代码图片

4.直接上代码了

public class MainActivityextends Activity {

private String[]PERMISSION =new String[]{Manifest.permission.ACCESS_FINE_LOCATION};

private static final StringTAG ="";

private static final int OPEN_SET_REQUEST_CODE =15;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initData();

}

private void initData() {

if (lacksPermissions(PERMISSION)) {

Log.i(TAG, "缺少权限去申请");

ActivityCompat.requestPermissions(this, PERMISSION, OPEN_SET_REQUEST_CODE);

}else {

Log.i(TAG, "已经全部打开权限");

}

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (requestCode ==OPEN_SET_REQUEST_CODE) {

if (lacksPermissions(PERMISSION)) {

Log.i(TAG, "缺少权限去申请");

ActivityCompat.requestPermissions(this, PERMISSION, OPEN_SET_REQUEST_CODE);

}

}

}

@Override

public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

super.onRequestPermissionsResult(requestCode, permissions, grantResults);

if (requestCode ==OPEN_SET_REQUEST_CODE) {

if (hasAllPermissionsGranted(grantResults)) {

Log.i(TAG, "用户允许打开权限");

}else {

Log.i(TAG, "用户拒绝打开权限");

showPermissionDialog("请去设置页面打开***权限", OPEN_SET_REQUEST_CODE);

}

}

}

/**

* 判断权限申请结果

*

* @param grantResults

* @return

*/

private boolean hasAllPermissionsGranted(@NonNull int[] grantResults) {

for (int grantResult : grantResults) {

if (grantResult == PackageManager.PERMISSION_DENIED) {//PERMISSION_GRANTED 授予

return false;

}

}

return true;

}

// 判断是否缺少权限权限集合 true=缺少权限

public boolean lacksPermissions(String... permissions) {

for (String permission : permissions) {

if (lacksPermission(permission)) {

return true;

}

}

return false;

}

// 判断是否缺少权限  true=缺少权限

public boolean lacksPermission(String permission) {

return ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_DENIED;

}

private void showPermissionDialog(String text, int requestCode) {

/*此处弹出Dialog显示内容为text(需要去设置页面打开***权限)具体Dialog我就不写了,

点击确定按钮调用toSetActivity(OPEN_SET_REQUEST_CODE)方法*/

toSetActivity(requestCode);

}

private void toSetActivity(int requestCode) {

Intent intent =new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);

Uri uri = Uri.fromParts("package", getPackageName(), null);

intent.setData(uri);

startActivityForResult(intent, requestCode);

}

}